WO2022038725A1 - Waveguide mode measurement device, waveguide mode measurement method, waveguide system, and waveguide device - Google Patents

Abstract

The present invention provides a waveguide mode measurement device (5) that measures the amplitude of a TM01-mode electromagnetic wave propagating through a circular waveguide (2) having a tube wall (2a) or of a TE11-mode electromagnetic wave propagating through the circular waveguide (2). The waveguide mode measurement device (5) comprises: a measured value acquisition unit (11) that acquires, from a measuring instrument (4) connected to the ends of a plurality of probes (3) inserted into a plurality of holes (2b) penetrating the tube wall (2a), a measured value of the voltage appearing at each of the plurality of probes (3); an average value calculation unit (12) that calculates the average value of the plurality of measured values acquired by the measured value acquisition unit (11); and an amplitude calculation unit (13) that is provided with at least one among a first amplitude calculation processing unit (14) and a second amplitude calculation processing unit (15), where the first amplitude calculation processing unit (14) calculates the amplitude of an electromagnetic wave in the TM01 mode from the average value calculated by the average value calculation unit (12), and the second amplitude calculation processing unit (15) subtracts the average value calculated by the average value calculation unit (12) from the individual measured values acquired by the measured value acquisition unit (11), calculates a weighted average value of the plurality of measured values after subtracting the average value, and calculates the amplitude of an electromagnetic wave in the TE11 mode from the weighted average value. Therefore, the waveguide mode measurement device (5) makes it possible to measure the amplitude of an electromagnetic wave inside the circular waveguide (2) without having to emit the electromagnetic wave into a space.

Description

Waveguide mode measuring device, waveguide mode measuring method, waveguide system and waveguide device

The present disclosure relates to a waveguide mode measuring device, a waveguide mode measuring method, a waveguide system, and a waveguide device.

As a method of measuring the amplitude of each electromagnetic wave in a plurality of waveguide modes possessed by a circular waveguide, a horn antenna is used to radiate the electromagnetic wave in the waveguide mode into space, and the electromagnetic wave in space is emitted. There is a method of measuring the amplitude of each electromagnetic wave by analyzing the radiation pattern (hereinafter referred to as "conventional waveguide mode measuring method").

By the way, by connecting a plurality of coaxial cables around the circular waveguide, a power distributor that enables the extraction of the electromagnetic wave of the TM01 mode possessed by the circular waveguide from each coaxial cable. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-040900

In the conventional waveguide mode measurement method, depending on the power of the electromagnetic wave in the circular waveguide, the electromagnetic wave radiated in the space may have an adverse effect such as electromagnetic interference on the peripheral equipment of the circular waveguide. be. In order to reduce the adverse effects on peripheral devices, it may be necessary to stop the radiation of electromagnetic waves into the space. The conventional waveguide mode measuring method has a problem that if the radiation of the electromagnetic wave to the space is stopped, the amplitude of the electromagnetic wave cannot be measured.
Even if the power distributor disclosed in Patent Document 1 is applied to a conventional waveguide mode measuring device, the adverse effect on peripheral devices cannot be suppressed, so that the above problem cannot be solved.

The present disclosure has been made to solve the above-mentioned problems, and is a waveguide mode measuring device and a guide that can measure the amplitude of an electromagnetic wave without radiating an electromagnetic wave in a circular waveguide into space. The purpose is to obtain a waveguide mode measurement method.

The waveguide mode measuring device according to the present disclosure measures the amplitude of the TM01 mode electromagnetic wave propagating in a circular waveguide having a tube wall or the TE11 mode electromagnetic wave propagating in a circular waveguide mode. It is a measuring device, and the measured value of the voltage appearing in each probe is acquired from the measuring instrument connected to the end of the plurality of probes inserted in each of the plurality of holes penetrating the tube wall. The amplitude of the electromagnetic wave in the TM01 mode is calculated from the measured value acquisition unit, the average value calculation unit that calculates the average value of multiple measured values acquired by the measurement value acquisition unit, and the average value calculated by the average value calculation unit. The average value calculated by the average value calculation unit is subtracted from each measured value acquired by the first amplitude calculation processing unit or the measurement value acquisition unit, and the weighting of a plurality of measured values after the average value is subtracted. Among the second amplitude calculation processing units that calculate the average value and calculate the amplitude of the electromagnetic wave in the TE11 mode from the weighted average value, the second amplitude calculation processing unit includes an amplitude calculation unit including one or more amplitude calculation processing units.

According to the present disclosure, the amplitude of the electromagnetic wave can be measured without radiating the electromagnetic wave in the circular waveguide into the space.

It is a block diagram which shows the waveguide system which concerns on Embodiment 1. FIG. It is a perspective view which shows the waveguide device 1 which concerns on Embodiment 1. FIG. It is a side view which shows the waveguide device 1 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the waveguide device 1 which concerns on Embodiment 1. FIG. It is an enlarged view which shows the main part of the waveguide apparatus 1 which concerns on Embodiment 1. FIG. It is a block diagram which shows the waveguide mode measuring apparatus 5 which concerns on Embodiment 1. FIG. It is a hardware block diagram which shows the hardware of the waveguide mode measuring apparatus 5 which concerns on Embodiment 1. FIG. FIG. 3 is a hardware configuration diagram of a computer when the waveguide mode measuring device 5 is realized by software, firmware, or the like. 9A is an explanatory diagram showing each of the electric field and the magnetic field of the electromagnetic wave in the TE11A mode, FIG. 9B is an explanatory diagram showing each of the electric field and the magnetic field of the electromagnetic wave in the TE11B mode, and FIG. 9C is the electric field and the magnetic field of the electromagnetic wave in the TM01 mode. It is explanatory drawing which shows each of. It is a flowchart which shows the waveguide mode measuring method which is the processing procedure of the waveguide mode measuring apparatus 5. It is a block diagram which shows the waveguide system which concerns on Embodiment 2. It is a side view which shows the waveguide device 1 which concerns on Embodiment 2. FIG. It is sectional drawing which shows the waveguide device 1 which concerns on Embodiment 2. FIG.

Hereinafter, in order to explain the present disclosure in more detail, a mode for carrying out the present disclosure will be described in accordance with the attached drawings.

Embodiment 1.
FIG. 1 is a configuration diagram showing a waveguide system according to the first embodiment.
The waveguide system shown in FIG. 1 includes a waveguide device 1, a measuring device 4, and a waveguide mode measuring device 5.
The waveguide device 1 includes a circular waveguide 2 and an n-th power probe 3 of 2. n is an integer of 2 or more.
In the waveguide system shown in FIG. 1, n = 3, and the waveguide device 1 includes 2 cubes (= 8) probes 3-1 to 3-8. Hereinafter, when the probes 3-1 to 3-8 are not distinguished, the term “probe 3” may be used.
The circular waveguide 2 has a TM01 mode and a TE11 mode as the waveguide modes, respectively.
The circular waveguide 2 shown in FIG. 1 may have a TM01 mode and a TE11 mode, respectively, and may further have a waveguide mode different from each of the TM01 mode and the TE11 mode.

FIG. 2 is a perspective view showing the waveguide device 1 according to the first embodiment, FIG. 3 is a side view showing the waveguide device 1 according to the first embodiment, and FIG. 4 is a side view showing the embodiment. It is sectional drawing which shows the waveguide device 1 which concerns on Embodiment 1. FIG.
FIG. 5 is an enlarged view showing a main part of the waveguide device 1 according to the first embodiment.
The circular waveguide 2 has a tube wall 2a, and the tube wall 2a is provided with a plurality of holes 2b as through holes.
The number of holes 2b is 2 to the nth root, and 2 to the nth root holes 2b are arranged at intervals of 45 degrees in the circumferential direction of the pipe wall 2a. In the waveguide system shown in FIG. 1, n = 3, and the number of holes 2b is 2 to the 3rd power (= 8).
As a plurality of probes 3, 2 n-th power probes 3 are arranged at intervals of 45 degrees in the circumferential direction of the tube wall 2a.
In the waveguide system shown in FIG. 1, n = 3, and eight probes 3-1 to 3-8 are arranged at intervals of 45 degrees in the circumferential direction of the tube wall 2a.
Probe 3-1 is the first probe, probe 3-2 is the second probe, probe 3-3 is the third probe, and probe 3-4 is the fourth probe.
Probe 3-5 is the fifth probe, probe 3-6 is the sixth probe, probe 3-7 is the seventh probe, and probe 3-8 is the eighth probe.

The probe 3-m (m = 1, 2, ..., 8) is realized by, for example, a coaxial line.
When the probe 3-m is realized by a coaxial line, the probe 3-m has an inner conductor 3a of the coaxial line.
One end of the probe 3-m is inserted into a hole 2b penetrating the tube wall 2a of the circular waveguide 2.
The other end of the probe 3-m is connected to the measuring instrument 4.
When the probe 3-m is realized by a coaxial line, the inner conductor 3a of the coaxial line is inserted into the hole 2b as shown in FIG.
In FIG. 5, the inner conductor 3a of the coaxial line is inserted into the hole 2b, and the tip of the inner conductor 3a remains at the position of the hole 2b. However, this is only an example, and the tip of the inner conductor 3a may be inserted into the circular waveguide 2 through the hole 2b.
In the waveguide system shown in FIG. 1, it is assumed that probes 3 having the same shape are used as the eight probes 3-1 to 3-8. However, this is only an example, and probes 3 having different shapes may be used as probes 3-1 to 3-8.
In the waveguide system shown in FIG. 1, the probe 3-m is realized by a coaxial line. However, this is only an example, and the probe 3-m may be realized by, for example, a rectangular waveguide.

The measuring instrument 4 is realized by, for example, an oscilloscope.
The other ends of the probes 3-1 to 3-8 are connected to the measuring instrument 4.
The measuring instrument 4 measures the voltage appearing in each probe 3-m.
The measuring device 4 outputs measurement information indicating the measured value Pm (m = 1, 2, ..., 8) of each voltage to the waveguide mode measuring device 5.

As shown in FIG. 6, the waveguide mode measuring device 5 includes a measured value acquisition unit 11, an average value calculation unit 12, and an amplitude calculation unit 13.
The waveguide mode measuring device 5 calculates each of the amplitude of the electromagnetic wave in the TM01 mode and the amplitude of the electromagnetic wave in the TE11 mode.

FIG. 6 is a block diagram showing the waveguide mode measuring device 5 according to the first embodiment.
FIG. 7 is a hardware configuration diagram showing the hardware of the waveguide mode measuring device 5 according to the first embodiment.
The measured value acquisition unit 11 is realized by, for example, the measured value acquisition circuit 21 shown in FIG. 7.
The measured value acquisition unit 11 acquires measurement information indicating the measured value Pm of the voltage appearing in each probe 3-m (m = 1, 2, ..., 8) from the measuring instrument 4.
The measured value acquisition unit 11 outputs the measurement information to each of the average value calculation unit 12 and the amplitude calculation unit 13.

The average value calculation unit 12 is realized by, for example, the average value calculation circuit 22 shown in FIG. 7.
The average value calculation unit 12 calculates the average value _Pave of the measured values P1 to P8 acquired by the measured value acquisition unit 11.
The mean value calculation unit 12 outputs the mean value _Pave to the amplitude calculation processing unit 13.

The amplitude calculation unit 13 includes a first amplitude calculation processing unit 14 and a second amplitude calculation processing unit 15.
The amplitude calculation unit 13 calculates the electromagnetic wave amplitude Amp ₁ in the TM01 mode and the electromagnetic wave amplitudes Amp _2A and Amp _2B in the TE11 mode.
In the waveguide system shown in FIG. 1, the amplitude calculation unit 13 includes a first amplitude calculation processing unit 14 and a second amplitude calculation processing unit 15. However, even if the amplitude calculation unit 13 calculates the amplitude of the electromagnetic wave in any one of the amplitude Amp ₁ of the electromagnetic wave in the TM01 mode and the amplitude Amp _2A and Amp _2B of the electromagnetic wave in the TE11 mode. good. When calculating the amplitude of the electromagnetic wave in any one mode, the amplitude calculation unit 13 may include either the first amplitude calculation processing unit 14 or the second amplitude calculation processing unit 15. ..

The first amplitude calculation processing unit 14 is realized by, for example, the first amplitude calculation circuit 23 shown in FIG. 7.
The first amplitude calculation processing unit 14 calculates the amplitude Amp ₁ of the electromagnetic wave in the TM01 mode from the average value _Ave calculated by the average value calculation unit 12.
The second amplitude calculation processing unit 15 is realized by, for example, the second amplitude calculation circuit 24 shown in FIG. 7.
The second amplitude calculation processing unit 15 subtracts the average value _Pave calculated by the average value calculation unit 12 from each measured value Pm acquired by the measurement value acquisition unit 11, so that the average value is subtracted. Calculate the measured value Pm'.
The second amplitude calculation processing unit 15 calculates the weighted average value of the plurality of measured values Pm'after the average value is subtracted, and calculates the amplitudes Amp _2A and Amp _2B of the electromagnetic wave in the TE11 mode from the weighted average value.

In FIG. 6, each of the measured value acquisition unit 11, the average value calculation unit 12, the first amplitude calculation processing unit 14, and the second amplitude calculation processing unit 15, which are the components of the waveguide mode measuring device 5, is shown in FIG. It is assumed that it is realized by dedicated hardware as shown in 7. That is, it is assumed that the waveguide mode measuring device 5 is realized by the measured value acquisition circuit 21, the mean value calculation circuit 22, the first amplitude calculation circuit 23, and the second amplitude calculation circuit 24.
Each of the measured value acquisition circuit 21, the average value calculation circuit 22, the first amplitude calculation circuit 23 and the second amplitude calculation circuit 24 is, for example, a single circuit, a composite circuit, a programmed processor, or a parallel programmed processor. , ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or a combination thereof.

The components of the waveguide mode measuring device 5 are not limited to those realized by dedicated hardware, and the waveguide mode measuring device 5 is realized by software, firmware, or a combination of software and firmware. It may be what is done.
The software or firmware is stored as a program in the memory of the computer. A computer means hardware that executes a program, and corresponds to, for example, a CPU (Central Processing Unit), a central processing unit, a processing unit, a computing device, a microprocessor, a microcomputer, a processor, or a DSP (Digital Signal Processor). do.

FIG. 8 is a hardware configuration diagram of a computer when the waveguide mode measuring device 5 is realized by software, firmware, or the like.
When the waveguide mode measuring device 5 is realized by software, firmware, or the like, the measured value acquisition unit 11, the average value calculation unit 12, the first amplitude calculation processing unit 14, and the second amplitude calculation processing unit 15, respectively. A program for causing the computer to execute the processing procedure of is stored in the memory 31. Then, the processor 32 of the computer executes the program stored in the memory 31.

Further, FIG. 7 shows an example in which each of the components of the waveguide mode measuring device 5 is realized by dedicated hardware, and FIG. 8 shows an example in which the waveguide mode measuring device 5 is realized by software, firmware, or the like. An example is shown. However, this is only an example, and some components in the waveguide mode measuring device 5 may be realized by dedicated hardware, and the remaining components may be realized by software, firmware, or the like. ..

The circular waveguide 2 has at least TM01 mode and TE11 mode as waveguide modes.
The electromagnetic wave in the TE11 mode includes a first polarization and a second polarization orthogonal to the first polarization. The first polarization is, for example, vertical vertical polarization as shown in FIG. 9A, and the second polarization is, for example, horizontal horizontal polarization as shown in FIG. 9B.
Hereinafter, the vertical polarization in the vertical direction as shown in FIG. 9A is referred to as an electromagnetic wave in the TE11A mode. Further, the horizontal horizontal polarization as shown in FIG. 9B is referred to as an electromagnetic wave in the TE11B mode.
Among the electromagnetic waves in the TE11 mode, even if the polarization has an arbitrary tilt angle, it can be included in either the TE11A mode or the TE11B mode.
FIG. 9A is an explanatory diagram showing each of the electric field and the magnetic field of the electromagnetic wave in the TE11A mode, and FIG. 9B is an explanatory diagram showing each of the electric field and the magnetic field of the electromagnetic wave in the TE11B mode.
FIG. 9C is an explanatory diagram showing each of the electric field and the magnetic field of the electromagnetic wave in the TM01 mode.
In the waveguide system shown in FIG. 1, each of the vertical polarization in the vertical direction and the horizontal polarization in the horizontal direction is defined as follows.
In FIG. 3, the vertical polarization in the vertical direction is defined as the polarization in the φ = 0 [deg] direction, which is the direction from the center of the circular waveguide 2 to the probe 3-1.
The horizontal polarization in the lateral direction is defined as the polarization in the φ = 90 [deg] direction, which is the direction from the center of the circular waveguide 2 to the probe 3-3 in FIG.

Eight probes 3-1 to 3-8 are arranged at intervals of 45 degrees in the circumferential direction on the tube wall 2a of the circular waveguide 2.
The probe 3-1 is arranged in the φ = 0 [deg] direction, and the measured value of the voltage appearing on the probe 3-1 is P1.
The probe 3-2 is arranged in the φ = 45 [deg] direction, and the measured value of the voltage appearing on the probe 3-2 is P2.
The probe 3-3 is arranged in the φ = 90 [deg] direction, and the measured value of the voltage appearing on the probe 3-3 is P3.
The probe 3-4 is arranged in the φ = 135 [deg] direction, and the measured value of the voltage appearing on the probe 3-4 is P4.
The probe 3-5 is arranged in the φ = 180 [deg] direction, and the measured value of the voltage appearing on the probe 3-5 is P5.
The probe 3-6 is arranged in the φ = 225 [deg] direction, and the measured value of the voltage appearing on the probe 3-6 is P6.
The probe 3-7 is arranged in the φ = 270 [deg] direction, and the measured value of the voltage appearing on the probe 3-7 is P7.
The probe 3-8 is arranged in the φ = 315 [deg] direction, and the measured value of the voltage appearing on the probe 3-8 is P8.

The relative amount of electromagnetic waves coupled to each probe 3-m (m = 1, 2, ..., 8) is as follows. The amount of binding is represented by the amplitude of the electromagnetic wave coupled to the probe 3-m and the phase of the electromagnetic wave coupled to the probe 3-m.
In TM01 mode, the amplitude of the electromagnetic wave coupled to each probe 3-m (m = 1, 2, ..., 8) is the same, and the phase of the electromagnetic wave coupled to each probe 3-m is , In phase.

In TE11A mode, the amplitude of the electromagnetic wave coupled to each of probe 3-1 and probe 3-5 is that of the electromagnetic wave coupled to each of the other probes 3-2 to 3-4, 3-6 to 3-8. It is larger than the amplitude and has the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-1 and the phase of the electromagnetic wave coupled to the probe 3-5 are opposite in phase. The amplitude of the electromagnetic wave coupled to each of the probe 3-2 and the probe 3-6 is -3 [dB] rather than the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-2 and the phase of the electromagnetic wave coupled to the probe 3-6 are opposite in phase. The amplitude of the electromagnetic wave coupled to each of the probe 3-4 and the probe 3-8 is -3 [dB] rather than the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-4 and the phase of the electromagnetic wave coupled to the probe 3-8 are opposite in phase. Almost no electromagnetic wave is bound to each of the probe 3-3 and the probe 3-7.

In TE11B mode, the amplitude of the electromagnetic wave bound to each of probe 3-3 and probe 3-7 is bound to each of the other probes 3-1, 3-2, 3-4 to 3-6, 3-8. It is larger than the amplitude of the electromagnetic wave to be generated and has the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-3 and the phase of the electromagnetic wave coupled to the probe 3-7 are opposite in phase. The amplitude of the electromagnetic wave coupled to each of the probe 3-2 and the probe 3-6 is -3 [dB] rather than the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-2 and the phase of the electromagnetic wave coupled to the probe 3-6 are opposite in phase. The amplitude of the electromagnetic wave coupled to each of the probe 3-4 and the probe 3-8 is -3 [dB] rather than the maximum amplitude. The phase of the electromagnetic wave coupled to the probe 3-4 and the phase of the electromagnetic wave coupled to the probe 3-8 are opposite in phase. Almost no electromagnetic wave is bound to each of the probe 3-1 and the probe 3-5.

If the shapes of the probes 3-1 to 3-8 are the same, the amount of electromagnetic waves bound to each probe 3-m is the relative amount of binding as described above.
For example, in a computer (not shown), if the shapes of the probes 3-1 to 3-8 are the same, the amount of electromagnetic waves bound to each probe 3-m is used in the TM01 mode for all the probes 3. The binding amount B _TM01 , the binding amount B TE11A for all probes 3 in TE11A mode, and the binding amount B _TE11B for all probes 3 in _TE11B mode are calculated. Since each calculation process for the binding amount B _TM01 , the binding amount B _TE11A , and the binding amount B _TE11B is a known technique, detailed description thereof will be omitted.
The amount of electromagnetic waves coupled to each probe 3-m differs depending on the shape of each probe 3-m. If the shapes of the probes 3-1 to 3-8 are different from each other, for example, a computer (not shown) may perform electromagnetic field analysis or the like to bond the amount B in the _TM01 mode and the binding in the TE11A mode. The amount B _TE11A and the binding amount B _TE11B in the TE11B mode are calculated respectively.
The coupling amount B _TM01 is stored in the internal memory of the first amplitude calculation processing unit 14, and each of the coupling amount B _TE11A and the coupling amount B _TE11B is stored in the internal memory of the second amplitude calculation processing unit 15.

Next, the operation of the waveguide system shown in FIG. 1 will be described.
FIG. 10 is a flowchart showing a waveguide mode measuring method, which is a processing procedure of the waveguide mode measuring device 5.
The measuring instrument 4 measures the voltage appearing in each probe 3-m (m = 1, 2, ..., 8) as a time waveform.
The measuring device 4 outputs measurement information indicating the measured value Pm (m = 1, 2, ..., 8) of each voltage to the waveguide mode measuring device 5.

The measured value acquisition unit 11 of the waveguide mode measuring device 5 acquires measurement information indicating the measured value Pm of the voltage appearing in each probe 3-m from the measuring device 4 (step ST1 in FIG. 10).
The measured value acquisition unit 11 outputs the measurement information to each of the average value calculation unit 12 and the second amplitude calculation processing unit 15.

　平均値算出部１２は、平均値Ｐ_ａｖｅを第１の振幅算出処理部１４及び第２の振幅算出処理部１５のそれぞれに出力する。 The average value calculation unit 12 acquires measurement information from the measurement value acquisition unit 11.
As shown in the following equation (1), the mean value calculation unit 12 calculates the mean value _Pave of the measured values P1 to P8 indicated by the measurement information (step ST2 in FIG. 10).

The mean value calculation unit 12 outputs the mean value _Pave to each of the first amplitude calculation processing unit 14 and the second amplitude calculation processing unit 15.

The first amplitude calculation processing unit 14 acquires the average value _Pave from the average value calculation unit 12.
As shown in the following equation (2), the first amplitude calculation processing unit 14 adds the coupling amount B _TM01 in the TM01 mode stored in the internal memory to the average value _Pave , thereby in the TM01 mode. The amplitude Amp ₁ of the electromagnetic wave is calculated (step ST3 in FIG. 10).
Amp ₁ = P _ave + B _TM01 (2)
The first amplitude calculation processing unit 14 outputs the amplitude Amp ₁ of the electromagnetic wave in the TM01 mode to, for example, an external device (not shown) that uses the electromagnetic wave in the TM01 mode.

The second amplitude calculation processing unit 15 acquires measurement information from the measured value acquisition unit 11, and acquires the average value _Pave from the average value calculation unit 12.
As shown in the following equation (3), the second amplitude calculation processing unit 15 obtains the average value _Pave from each measured value Pm (m = 1, 2, ..., 8) indicated by the measurement information. By subtracting, the measured value Pm'after subtracting the average value is calculated (step ST4 in FIG. 10).
Pm'= Pm-P _ave (3)

　ｋは、係数であり、ｋ＝√２であれば、ｋをデシベル換算すると、３［ｄＢ］に相当する。 As shown in the following equation (4), the second amplitude calculation processing unit 15 has a measured value P1', a measured value P2', a measured value P4', a measured value P5', a measured value P6', and a measured value P8'. Is calculated as the first weighted average value WP _ave1 (step ST5 in FIG. 10).

k is a coefficient, and if k = √2, it corresponds to 3 [dB] when k is converted into decibels.

As shown in the following equation (5), the second amplitude calculation processing unit 15 has a measured value P2', a measured value P3', a measured value P4', a measured value P6', a measured value P7', and a measured value P8'. Is calculated as the second weighted average value WP _ave2 (step ST6 in FIG. 10).

As shown in the following equation (6), the second amplitude calculation processing unit 15 adds the coupling amount B _TE11A in the TE11A mode stored in the internal memory to the first weighted average value WP _ave1 . , The amplitude Amp _2A of the electromagnetic wave in the TE11 mode A is calculated (step ST7 in FIG. 10).
Amp _2A = WP _ave1 + B _TE11A (6)

As shown in the following equation (7), the second amplitude calculation processing unit 15 adds the coupling amount B _TE11B in the TE11B mode stored in the internal memory to the second weighted average value WP _ave2 . , The amplitude Amp _2B of the electromagnetic wave in the TE11B mode is calculated (step ST8 in FIG. 10).
Amp _2B = WP _ave2 + B _TE11B (7)
The second amplitude calculation processing unit 15 is an external device that uses each of the electromagnetic wave amplitude Amp _2A in the TE11A mode and the electromagnetic wave amplitude Amp _2B in the TE11B mode, for example, the electromagnetic wave in the TE11A mode and the electromagnetic wave in the TE11B mode. Output to) (not shown).

In the above-described first embodiment, the waveguide mode measurement for measuring the amplitude of the TM01 mode electromagnetic wave propagating in the circular waveguide 2 having the tube wall 2a or the TE11 mode electromagnetic wave propagating in the circular waveguide 2. In the device 5, the voltage appearing in each probe 3 from the measuring instrument 4 connected to the end of the plurality of probes 3 inserted in each of the plurality of holes 2b penetrating the tube wall 2a. From the measured value acquisition unit 11 that acquires the measured value, the average value calculation unit 12 that calculates the average value of the plurality of measured values acquired by the measured value acquisition unit 11, and the average value calculated by the average value calculation unit 12. , The average value calculated by the average value calculation unit 12 is subtracted from each measurement value acquired by the first amplitude calculation processing unit 14 for calculating the amplitude of the electromagnetic wave in the TM01 mode or the measurement value acquisition unit 11. , One or more amplitude calculation processes in the second amplitude calculation processing unit 15 that calculates the weighted average value of a plurality of measured values after subtracting the average value and calculates the amplitude of the electromagnetic wave in the TE11 mode from the weighted average value. It is provided with an amplitude calculation unit 13 including a unit. Therefore, the waveguide mode measuring device 5 can measure the amplitude of the electromagnetic wave without radiating the electromagnetic wave in the circular waveguide 2 into the space.

The circular waveguide 2 shown in FIG. 1 has a TM01 mode and a TE11 mode as waveguide modes, respectively. The circular waveguide 2 shown in FIG. 1 may have, for example, a TE21 mode in addition to the TM01 mode and the TE11 mode as the waveguide mode.
When the circular waveguide 2 shown in FIG. 1 has the TE21 mode, in the TE21 mode, the phases of the electromagnetic waves coupled to each of the two probes 3 arranged at opposite positions are in phase. Become. Further, the phase of the electromagnetic wave coupled to the certain probe 3 is in phase with the phase of the electromagnetic wave coupled to the probe 3 arranged at a position 90 degrees away from the certain probe 3. In the _TE21 mode, the average value Pave of the measured values P1 to P8 becomes 0, so that the circular waveguide 2 has the _TE21 mode is the amplitude of the electromagnetic wave in the TM01 mode calculated from the average value Pave. Does not affect Amp ₁ .
Further, in the TE21 mode, the phases of the electromagnetic waves coupled to each of the two probes 3 arranged at opposite positions are in phase, so that the circular waveguide 2 has the TE21 mode. , Does not affect the calculation of electromagnetic wave amplitudes Amp _2A and Amp _2b in TE11 mode.

In the waveguide device 1 shown in FIG. 1, eight probes 3-1 to 3-8 are arranged in a row at intervals of 45 degrees in the circumferential direction of the tube wall 2a. However, the value of the coefficient k included in each of the equations (4) and (5) may be changed according to the interval between the respective probes, and the eight probes 3-1 to 3-8 may be used. , It is not necessary to line up at equal intervals of 45 degrees. However, the four coefficients k included in each of the equations (4) and (5) are set as k1, k2, k3, and k4, and different values are set according to the distance between the respective probes. There is a need.
Further, the probes 3-1 to 3-8 do not need to be arranged in a line in the circumferential direction of the tube wall 2a.

Embodiment 2.
In the second embodiment, n = ² , and 4 (= 22) probes 3 are arranged in the circumferential direction of the tube wall 2a of the circular waveguide 2 at an interval of 45 degrees. Will be explained.

FIG. 11 is a configuration diagram showing a waveguide system according to the second embodiment.
FIG. 12 is a side view showing the waveguide device 1 according to the second embodiment, and FIG. 13 is a cross-sectional view showing the waveguide device 1 according to the second embodiment.
In FIGS. 11 to 13, the same reference numerals as those in FIGS. 1 to 5 indicate the same or corresponding portions, and thus the description thereof will be omitted.
Probe 3-1 is the first probe, probe 3-2 is the second probe, probe 3-3 is the third probe, and probe 3-4 is the fourth probe.

The probe 3-1 is arranged in the φ = 0 [deg] direction, and the measured value of the voltage appearing on the probe 3-1 is P1.
The probe 3-2 is arranged in the φ = 45 [deg] direction, and the measured value of the voltage appearing on the probe 3-2 is P2.
The probe 3-3 is arranged in the φ = 90 [deg] direction, and the measured value of the voltage appearing on the probe 3-3 is P3.
The probe 3-4 is arranged in the φ = 135 [deg] direction, and the measured value of the voltage appearing on the probe 3-4 is P4.

The configuration of the waveguide mode measuring device 5 according to the second embodiment is the same as the configuration of the waveguide mode measuring device 5 according to the first embodiment, and the waveguide mode measuring device 5 according to the second embodiment. FIG. 6 is a configuration diagram showing the above.
In the waveguide system shown in FIG. 11, the amplitude calculation unit 13 includes a first amplitude calculation processing unit 14 and a second amplitude calculation processing unit 15. However, even if the amplitude calculation unit 13 calculates the amplitude of the electromagnetic wave in any one of the amplitude Amp ₁ of the electromagnetic wave in the TM01 mode and the amplitude Amp _2A and Amp _2B of the electromagnetic wave in the TE11 mode. good. When calculating the amplitude of the electromagnetic wave in any one mode, the amplitude calculation unit 13 may include either the first amplitude calculation processing unit 14 or the second amplitude calculation processing unit 15. ..

Next, the operation of the waveguide system shown in FIG. 11 will be described.
The measuring instrument 4 measures the voltage appearing in each probe 3-m (m = 1, 2, 3, 4) as a time waveform.
The measuring device 4 outputs measurement information indicating the measured value Pm (m = 1, 2, 3, 4) of each voltage to the waveguide mode measuring device 5.

The measured value acquisition unit 11 of the waveguide mode measuring device 5 acquires measurement information indicating the measured value Pm of the voltage appearing in each probe 3-m from the measuring device 4.
The measured value acquisition unit 11 outputs the measurement information to each of the average value calculation unit 12 and the second amplitude calculation processing unit 15.

　平均値算出部１２は、平均値Ｐ_ａｖｅを第１の振幅算出処理部１４及び第２の振幅算出処理部１５のそれぞれに出力する。 The average value calculation unit 12 acquires measurement information from the measurement value acquisition unit 11.
As shown in the following equation (8), the average value calculation unit 12 calculates the average value _Pave of the measured values P1 to P4 indicated by the measurement information.

The mean value calculation unit 12 outputs the mean value _Pave to each of the first amplitude calculation processing unit 14 and the second amplitude calculation processing unit 15.

The first amplitude calculation processing unit 14 acquires the average value _Pave from the average value calculation unit 12.
As shown in the following equation (9), the first amplitude calculation processing unit 14 adds the coupling amount B _TM01 in the TM01 mode stored in the internal memory to the average value _Pave , thereby in the TM01 mode. Calculate the amplitude Amp ₁ of the electromagnetic wave.
Amp ₁ = P _ave + B _TM01 (9)
The first amplitude calculation processing unit 14 outputs the amplitude Amp ₁ of the electromagnetic wave in the TM01 mode to, for example, an external device (not shown) that uses the electromagnetic wave in the TM01 mode.

The second amplitude calculation processing unit 15 acquires measurement information from the measured value acquisition unit 11, and acquires the average value _Pave from the average value calculation unit 12.
As shown in the following equation (10), the second amplitude calculation processing unit 15 subtracts the average value _Pave from each measured value Pm (m = 1, 2, 3, 4) indicated by the measurement information. By doing so, the measured value Pm'after subtracting the average value is calculated.
Pm'= Pm-P _ave (10)

As shown in the following equation (11), the second amplitude calculation processing unit 15 calculates the weighted average value of the measured value P1', the measured value P2', and the measured value P4'as the first weighted average value WP _ave1. do.

As shown in the following equation (12), the second amplitude calculation processing unit 15 calculates the weighted average value of the measured value P2', the measured value P3', and the measured value P4'as the second weighted average value WP _ave2. do.

As shown in the following equation (13), the second amplitude calculation processing unit 15 adds the coupling amount B _TE11A in the TE11A mode stored in the internal memory to the first weighted average value WP _ave1 . , The amplitude Amp _2A of the electromagnetic wave in the TE11 mode is calculated.
Amp _2A = WP _ave1 + B _TE11A (13)

As shown in the following equation (14), the second amplitude calculation processing unit 15 adds the coupling amount B _TE11B in the TE11B mode stored in the internal memory to the second weighted average value WP _ave2 . , The amplitude Amp _2B of the electromagnetic wave in the TE11B mode is calculated.
Amp _2B = WP _ave2 + B _TE11B (14)
The second amplitude calculation processing unit 15 is an external device that uses each of the electromagnetic wave amplitude Amp _2A in the TE11A mode and the electromagnetic wave amplitude Amp _2B in the TE11B mode, for example, the electromagnetic wave in the TE11A mode and the electromagnetic wave in the TE11B mode. Output to) (not shown).

In the above embodiment ² , the waveguide mode measuring device 5 in which 4 (= 22) probes 3 are arranged at intervals of 45 degrees in the circumferential direction of the tube wall 2a of the circular waveguide 2. Configured. Even when the four probes 3 are arranged at intervals of 45 degrees in the circumferential direction of the tube wall 2a of the circular waveguide 2, the waveguide mode measuring device 5 transmits electromagnetic waves in the circular waveguide 2. The amplitude of an electromagnetic wave can be measured without radiating it into space.
When the four probes 3 are arranged at an interval of 45 degrees in the circumferential direction of the tube wall 2a of the circular waveguide 2, the eight probes 3 are the circumferences of the tube wall 2a of the circular waveguide 2. It is possible to reduce the amplitude calculation process of the electromagnetic wave in the amplitude calculation unit 13 of the waveguide mode measuring device 5 as compared with the case where they are arranged at intervals of 45 degrees in the direction.

In the waveguide system shown in FIGS. 1 and 11, the number of the plurality of probes 3 inserted into the holes 2b of the tube wall 2a is 2 to the nth power. However, the value of the coefficient k included in each of the equations (4) and (5) or the value of the coefficient k included in each of the equations (11) and (12) is changed and weighted. By changing the calculation formula of the average, the number of the plurality of probes 3 inserted into the holes 2b of the tube wall 2a does not have to be 2 to the nth power.
However, for example, the four coefficients k included in each of the equations (4) and (5) are set to different k according to the number of probes 3 and the position of each probe 3, and the number of probes 3 is set. And, depending on the position of each probe 3, it is necessary to set different values to k.

In the present disclosure, any combination of the embodiments can be freely combined, any component of the embodiment can be modified, or any component can be omitted in each embodiment.

The present disclosure is suitable for a waveguide mode measuring device and a waveguide mode measuring method.
The present disclosure is suitable for waveguide systems including waveguide devices and waveguide mode measuring devices.
The present disclosure is suitable for waveguide devices.

1 Waveguide device, 2 Circular waveguide, 2a Waveguide wall, 2b hole, 3,3-1 to 3-8 probe, 3a Inner conductor, 4 Measuring instrument, 5 Waveguide mode measuring device, 11 Measurement value acquisition Unit, 12 average value calculation unit, 13 amplitude calculation unit, 14 first amplitude calculation processing unit, 15 second amplitude calculation processing unit, 21 measurement value acquisition circuit, 22 average value calculation circuit, 23 first amplitude calculation processing unit. , 24 Second amplitude calculation circuit, 31 Memory, 32 Processor.

Claims (11)

A waveguide mode measuring device for measuring the amplitude of an electromagnetic wave in TM01 mode propagating in a circular waveguide having a tube wall or an electromagnetic wave in TE11 mode propagating in the circular waveguide.
A measurement value acquisition unit that acquires a measured value of the voltage appearing in each probe from a measuring instrument connected to the end of a plurality of probes inserted in each of the plurality of holes penetrating the tube wall. ,
An average value calculation unit that calculates the average value of a plurality of measured values acquired by the measured value acquisition unit, and an average value calculation unit.
From the average value calculated by the mean value calculation unit, the first amplitude calculation processing unit that calculates the amplitude of the electromagnetic wave in the TM01 mode, or from each measurement value acquired by the measurement value acquisition unit, the average. A second amplitude in which the average value calculated by the value calculation unit is subtracted, the weighted average value of a plurality of measured values after the average value is subtracted is calculated, and the amplitude of the electromagnetic wave in the TE11 mode is calculated from the weighted average value. Among the calculation processing units, a waveguide mode measuring device including an amplitude calculation unit including one or more amplitude calculation processing units. As the plurality of probes, probes of 2 n (n is an integer of 2 or more) are arranged at intervals of 45 degrees in the circumferential direction of the tube wall.
The waveguide mode measuring device according to claim 1, wherein the measured value acquisition unit acquires a measured value of a voltage appearing in each probe from the measuring device. n = 3, and as 2 cubed probes, the first probe, the second probe, the third probe, the fourth probe, the fifth probe, the sixth probe, the seventh probe and the like. The eighth probes are lined up at intervals of 45 degrees in the circumferential direction.
The measured value of the voltage appearing in the first probe is P1, the measured value of the voltage appearing in the second probe is P2, the measured value of the voltage appearing in the third probe is P3, and the first. The measured value of the voltage appearing in the probe 4 is P4, the measured value of the voltage appearing in the fifth probe is P5, the measured value of the voltage appearing in the sixth probe is P6, and the seventh probe. When the measured value of the voltage appearing on the probe is P7 and the measured value of the voltage appearing on the eighth probe is P8.
The average value calculation unit is
The waveguide according to claim 2, wherein the average value of the P1, the P2, the P3, the P4, the P5, the P6, the P7, and the P8 is calculated. Mode measuring device. The first amplitude calculation processing unit is
The waveguide mode measuring device according to claim 3, wherein the amplitude of the electromagnetic wave in the TM01 mode is calculated from the average value calculated by the average value calculation unit. The second amplitude calculation processing unit is
By subtracting the average value calculated by the mean value calculation unit from each of the P1, the P2, the P3, the P4, the P5, the P6, the P7, and the P8, P1', P2', Calculate each of P3', P4', P5', P6', P7'and P8',
The weighted average values of the P1', the P2', the P4', the P5', the P6', and the P8'are calculated as the first weighted average value.
The weighted average values of the P2', the P3', the P4', the P6', the P7'and the P8' are calculated as the second weighted average value.
From the first weighted average value, the amplitude of the first polarization in the TE11 mode is calculated, and from the second weighted average value, the first in the TE11 mode, which is orthogonal to the first polarization. The waveguide mode measuring device according to claim 3, wherein the amplitude of the polarization of 2 is calculated. n = 2, and as squared 2 probes, the first probe, the second probe, the third probe, and the fourth probe are arranged at intervals of 45 degrees in the circumferential direction of the tube wall. And
The measured value of the voltage appearing in the first probe is P1, the measured value of the voltage appearing in the second probe is P2, the measured value of the voltage appearing in the third probe is P3 and the first. When the measured value of the voltage appearing on the probe of 4 is P4,
The average value calculation unit is
The waveguide mode measuring device according to claim 2, wherein the average value of the P1, the P2, the P3, and the P4 is calculated. The first amplitude calculation unit is
The waveguide mode measuring device according to claim 6, wherein the amplitude of the electromagnetic wave in the TM01 mode is calculated from the average value calculated by the average value calculation unit. The second amplitude calculation unit is
By subtracting the average value calculated by the average value calculation unit from each of the P1, the P2, the P3, and the P4, each of P1', P2', P3', and P4'is calculated.
The weighted average values of the P1', the P2', and the P4'are calculated as the first weighted average value.
The weighted average value of the P2', the P3', and the P4'is calculated as the second weighted average value.
From the first weighted average value, the amplitude of the first polarization in the TE11 mode is calculated, and from the second weighted average value, the first in the TE11 mode, which is orthogonal to the first polarization. The waveguide mode measuring device according to claim 6, wherein the amplitude of the polarization of 2 is calculated. A waveguide mode measuring method for measuring the amplitude of an electromagnetic wave in TM01 mode propagating in a circular waveguide having a tube wall or an electromagnetic wave in TE11 mode propagating in the circular waveguide.
The measured value acquisition unit acquires the measured value of the voltage appearing in each probe from the measuring instrument connected to the end of the plurality of probes inserted in each of the plurality of holes penetrating the tube wall. death,
The average value calculation unit calculates the average value of a plurality of measured values acquired by the measured value acquisition unit, and then calculates the average value.
Amplitude calculation processing, in which the amplitude calculation unit calculates the amplitude of the electromagnetic wave in the TM01 mode from the average value calculated by the average value calculation unit.
Alternatively, the average value calculated by the average value calculation unit is subtracted from each measurement value acquired by the measurement value acquisition unit, and a weighted average value of a plurality of measured values after the average value is subtracted is calculated. A waveguide mode measuring method comprising performing one or more amplitude calculation processes among the amplitude calculation processes for calculating the amplitude of an electromagnetic wave in the TE11 mode from a weighted average value. A circular waveguide having a tube wall, having TM01 mode and TE11 mode as a waveguide mode, and having a plurality of holes penetrating the tube wall as through holes of the tube wall. With a tube
Multiple probes with one end inserted into each hole penetrating the tube wall,
With the measuring instrument to which the other end of each probe is connected,
A waveguide system including the waveguide mode measuring device according to any one of claims 1 to 8. A circular waveguide having a tube wall, having TM01 mode and TE11 mode as a waveguide mode, and having a plurality of holes penetrating the tube wall as through holes of the tube wall. With a tube
A waveguide device with a plurality of probes having one end inserted into each hole penetrating the tube wall.

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