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WO2018146773A1 - Plaque de sélection de fréquence - Google Patents

Plaque de sélection de fréquence Download PDF

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Publication number
WO2018146773A1
WO2018146773A1 PCT/JP2017/004745 JP2017004745W WO2018146773A1 WO 2018146773 A1 WO2018146773 A1 WO 2018146773A1 JP 2017004745 W JP2017004745 W JP 2017004745W WO 2018146773 A1 WO2018146773 A1 WO 2018146773A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
notch
contact
frequency selection
dielectric case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/004745
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English (en)
Japanese (ja)
Inventor
真悟 山浦
西岡　泰弘
田中　泰
雄一郎 福間
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2017/004745 priority Critical patent/WO2018146773A1/fr
Priority to JP2018563931A priority patent/JP6486581B2/ja
Publication of WO2018146773A1 publication Critical patent/WO2018146773A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures

Definitions

  • This invention relates to a frequency selection plate for switching the phase of a radio wave passing therethrough.
  • Patent Document 1 discloses a frequency selection plate capable of switching the phase of a passing radio wave by mechanical driving.
  • the frequency selection plate includes a dielectric substrate that can be set to an arbitrary angle, and a drive unit that rotates the dielectric substrate by mechanical driving. Since the apparent relative permittivity of the dielectric that contributes to the incident radio wave changes as the driving unit rotates the dielectric substrate, the phase of the passing radio wave can be switched.
  • the phase of the passing radio wave can be switched.
  • the phase of the passing radio wave is switched by mechanical driving, there is a problem that reliability is lowered when used for a long time.
  • the present invention has been made to solve the above-mentioned problems, and frequency selection that can improve reliability when used for a long period of time, rather than switching the phase of a passing radio wave by mechanical drive.
  • the purpose is to obtain a board.
  • the frequency selection plate includes a first metal plate provided with a first notch for forming a slot in a part of the periphery and a second metal for forming a slot in a part of the periphery.
  • a second metal plate disposed in a non-contact state with the first metal plate such that the second notch faces the first notch, and the first notch
  • a dielectric case that is disposed in a slot formed by the notch and the second notch and contains an ionizing gas therein, one end in contact with the ionizing gas, and the other end of the first metal plate
  • An electrode, and the phase switching unit applies a voltage between the first metal plate and the second metal plate, so that the ionizing gas is applied. It causes a transition to the state of plasma, by varying the voltage, is obtained to switch the radio wave phase passing through the dielectric case.
  • the dielectric case that is disposed in the slot formed by the first notch and the second notch and contains the ionizing gas therein, and one end thereof is in contact with the ionizing gas
  • the first electrode penetrating the dielectric case so that the other end is in contact with the first metal plate
  • the dielectric so that one end is in contact with the ionizing gas and the other end is in contact with the second metal plate
  • a second electrode penetrating the case, and the phase switching unit applies a voltage between the first metal plate and the second metal plate to transition the ionizing gas to a plasma state.
  • it is configured to switch the phase of the radio wave passing through the dielectric case by changing the voltage, so when using it for a long time rather than switching the phase of the radio wave passing through mechanical drive There is an effect that can improve the reliability.
  • FIG. 1A is a plan view showing a frequency selection plate according to Embodiment 1 of the present invention
  • FIG. 1B is a cross-sectional view taken along line AA ′ of the frequency selection plate of FIG. 1A
  • FIG. 1C is BB ′ of the frequency selection plate of FIG. It is sectional drawing.
  • It is a top view which shows the 1st metal plate 1 and the 2nd metal plate 2 of the frequency selection board by Embodiment 1 of this invention.
  • It is a conceptual diagram which shows a plasma characteristic.
  • 4A is a plan view showing a frequency selection plate according to Embodiment 2 of the present invention
  • FIG. 4B is a cross-sectional view taken along line AA ′ of the frequency selection plate of FIG. 4A
  • FIG. 4C is BB ′ of the frequency selection plate of FIG. It is sectional drawing. It is a block diagram which shows the frequency selection board by Embodiment 3 of this invention. It is a block diagram which shows the frequency selection board by Embodiment 4 of this invention. It is a block diagram which shows the other frequency selection board by Embodiment 4 of this invention.
  • 8A is an explanatory diagram showing the relationship between the operating frequency and the amplitude of S21
  • FIG. 8B is an explanatory diagram showing the relationship between the operating frequency and the phase of S21
  • FIG. 8C shows the relationship between the relative permittivity ⁇ r and the phase of S21. It is explanatory drawing shown.
  • FIG. 9A is an explanatory diagram showing an analysis model for electromagnetic field simulation
  • FIG. 9A is an explanatory diagram showing an analysis model for electromagnetic field simulation
  • FIG. 9B is a cross-sectional view taken along the line A-A 'in the analysis model of FIG. 9A. It is a conceptual diagram which shows a transmit array antenna. It is a block diagram which shows the frequency selection board by Embodiment 5 of this invention. It is a block diagram which shows the frequency selection board by Embodiment 6 of this invention. It is a block diagram which shows the other frequency selection board by Embodiment 6 of this invention. It is a block diagram which shows the frequency selection board by Embodiment 7 of this invention. It is a block diagram which shows the frequency selection board by Embodiment 8 of this invention.
  • FIG. 16 is a cross-sectional view taken along the line A-A ′ of the frequency selection plate in FIG. 15.
  • FIG. 1 is a block diagram showing a frequency selection plate according to Embodiment 1 of the present invention.
  • 1A is a plan view showing a frequency selection plate according to Embodiment 1 of the present invention
  • FIG. 1B is a cross-sectional view taken along line AA ′ of the frequency selection plate of FIG. 1A
  • FIG. 1C is BB ′ of the frequency selection plate of FIG. It is sectional drawing.
  • FIG. 2 is a plan view showing the first metal plate 1 and the second metal plate 2 of the frequency selection plate according to Embodiment 1 of the present invention.
  • the first metal plate 1 is a metal plate provided with a first notch 1a for forming a rectangular slot 20 on a part of one side (a part of the periphery).
  • the second metal plate 2 is a metal plate provided with a second notch 2a for forming a rectangular slot 20 on a part of one side (a part of the periphery).
  • the second metal plate 2 is disposed in a non-contact state with the first metal plate 1 so that the second notch 2a faces the first notch 1a.
  • the slit 3 is a gap between the first metal plate 1 and the second metal plate 2. This gap is sufficiently short with respect to the wavelength ⁇ of the operating frequency. For example, the length is ⁇ / 20 or less. Since the slit 3 is provided between the first metal plate 1 and the second metal plate 2, the first metal plate 1 and the second metal plate 2 are separated in a direct current manner.
  • the dielectric case 4 is disposed in a slot 20 formed by the first notch 1a and the second notch 2a so that the outer frame is in contact with the first metal plate 1 and the second metal plate 2.
  • the ionizing gas 5 is contained inside.
  • the dielectric case 4 is used as a discharge tube.
  • the ionizing gas 5 include rare gases such as helium, neon, argon, xenon, and krypton.
  • the ionizing gas 5 is enclosed in the dielectric case 4.
  • the first electrode 6 passes through the dielectric case 4 so that one end is in contact with the ionizing gas 5 and the other end is in contact with the first metal plate 1.
  • the second electrode 7 penetrates the dielectric case 4 so that one end is in contact with the ionizing gas 5 and the other end is in contact with the second metal plate 2.
  • the outer frame of the dielectric case 4 is disposed so as to be in contact with the first metal plate 1 and the second metal plate 2. It is only necessary that the first metal plate 1 and the second metal plate 2 are close to each other, and they are not necessarily in contact with each other.
  • the distance between the outer frame of the dielectric case 4 and the first metal plate 1 and the second metal plate 2 may be ⁇ / 20 or less.
  • the phase switching unit 8 includes a wiring 9 and a plasma excitation power source 10.
  • the phase switching unit 8 applies a voltage between the first metal plate 1 and the second metal plate 2 to change the ionizing gas 5 to a plasma state, and at the same time, the first metal plate 1 and the first metal plate 1
  • the phase of the radio wave passing through the dielectric case 4 is switched by changing the voltage applied between the two metal plates 2.
  • the wiring 9 has one end connected to the first metal plate 1 and the other end connected to the second metal plate 2.
  • the plasma excitation power supply 10 is provided in the middle of the wiring 9 and is a power supply that applies a voltage between the first metal plate 1 and the second metal plate 2 and changes the voltage.
  • the dimension of the frequency selection board of this Embodiment 1 is illustrated.
  • the outer dimension (dimension in the xy axis direction) of the first metal plate 1, the slit 3, and the second metal plate 2 is, for example, 0.7 ⁇ 0 ⁇ 0.7 ⁇ 0 .
  • X-axis dimension of the slit 3 is, for example, about 0.017 ⁇ 0.
  • the dimension of the dielectric case 4 in the xy axis direction is, for example, 0.41 ⁇ 0 ⁇ 0.1 ⁇ 0 .
  • Z-axis dimension of the dielectric case 4 is, for example, 0.1 [lambda] 0, the outer frame of the thickness of the dielectric casing 4, considering the manufacturing aspect, for example, 1 mm.
  • lambda 0 is a wavelength corresponding to the operating frequency f 0 of the frequency selective surface.
  • FIG. 3 is a conceptual diagram showing plasma characteristics.
  • FIG. 3 shows the relationship between the frequency f of the incident radio wave and the relative dielectric constant ⁇ r of the plasma as plasma characteristics.
  • the relative permittivity ⁇ r of plasma changes depending on the frequency f of the incident radio wave.
  • e is the free electron charge
  • n e is the electron density
  • epsilon 0 is the vacuum dielectric constant
  • m e is the electron mass.
  • the electron density n e is dependent the type of ionizing gas 5, pressure, etc. to the discharge current. Therefore, for the plasma frequency f p, it depends the type of ionizing gas 5, pressure, etc. to the discharge current.
  • the discharge current is a current that flows when the plasma excitation power supply 10 applies a voltage between the first metal plate 1 and the second metal plate 2 to generate a discharge in the slot 20.
  • the relative dielectric constant ⁇ r tilde of the non-magnetized plasma which is a non-magnetized plasma, can be represented by, for example, the Drude model disclosed in Non-Patent Document 1, as shown in the following formula (2).
  • the symbol “ ⁇ ” cannot be added on the letter because of the electronic application, so it is expressed as “ ⁇ r tilde”.
  • v m the plasma collision frequency
  • omega is the angular frequency of the radio wave is incident.
  • Plasma collision frequency v m is dependent on the pressure of the ionized gas 5.
  • Non-Patent Document 1 R. J. Vidmar, “On the Use of Atmospheric Pressure Plasmas as Electromagnetic Reflectors and Absorbers,” IEEE Trans. Plasma Sci., Vol18, no.4, pp. 733-741. Aug. 1990.
  • the plasma excitation power supply 10 of the phase switching unit 8 causes the ionizing gas 5 enclosed in the dielectric case 4 to transition to the plasma state. It shall be used in the body area. That is, plasma is used in a frequency band equal to or higher than the plasma frequency fp.
  • the plasma excitation power supply 10 of the phase switching unit 8 discharges by changing the voltage applied between the first metal plate 1 and the second metal plate 2 when the ionizing gas 5 is in a plasma state. By changing the current, the relative dielectric constant ⁇ r of the plasma is varied between 0 and 1 in the band including the operating frequency f 0 as shown in FIG.
  • the first notch 1a and the second notch 2a are disposed in the slot 20 and the ionizing gas 5 is contained therein.
  • a dielectric case 4 one end in contact with the ionizing gas 5, and the other end in contact with the first metal plate 1.
  • a second electrode 7 penetrating the dielectric case 4 is provided so that the other end is in contact with the gas 5 and the other end is in contact with the second metal plate 2, and the phase switching unit 8 is connected to the first metal plate 1.
  • the phase of the passing radio wave can be switched electrically. As a result, there is an effect that the reliability in the case of long-term use can be improved rather than switching the phase of the passing radio wave by mechanical driving. Further, according to the first embodiment, since the first metal plate 1 and the second metal plate 2 are used as the bias circuit for changing the discharge current, the effect of simplifying the configuration of the bias line is also obtained. can get.
  • the slot 20 formed by the first notch 1a and the second notch 2a is a rectangular slot, but the present invention is not limited to this.
  • It may be a circular type, a bow tie type, a cross dipole type, a tripole type, a circular ring type or a square loop type slot.
  • Embodiment 2 FIG. In the first embodiment, the frequency selection plate in which the slit 3 is provided between the first metal plate 1 and the second metal plate 2 is shown. A frequency selection plate in which a capacitor 11 is connected between one metal plate 1 and a second metal plate 2 will be described.
  • FIG. 4 is a block diagram showing a frequency selection plate according to Embodiment 2 of the present invention.
  • 4A is a plan view showing a frequency selection plate according to Embodiment 2 of the present invention
  • FIG. 4B is a cross-sectional view taken along line AA ′ of the frequency selection plate of FIG. 4A
  • FIG. 4C is BB ′ of the frequency selection plate of FIG. It is sectional drawing.
  • the capacitor 11 has one end connected to the first metal plate 1 and the other end connected to the second metal plate 2.
  • FIG. 4 shows an example in which two capacitors 11 are connected, it is sufficient that one or more capacitors 11 are connected.
  • the value of the capacitor 11 flows to the second metal plate 2 for a high-frequency current excited by the incident radio wave, for example, to the first metal plate 1, but for the current supplied from the plasma excitation power supply 10, Set to the value to be blocked.
  • the value of the capacitor 11 is set to 20 pF, for example.
  • a method of connecting the capacitor 11 between the first metal plate 1 and the second metal plate 2 in addition to a method of connecting a lumped constant chip component, the first metal plate 1 and the second metal plate 2 are connected. For example, a method of forming a parallel plate type capacitor by overlapping a part of the above.
  • a capacitor 11 is connected between the first metal plate 1 and the second metal plate 2 in order to suppress unnecessary resonance due to the slit 3.
  • the first metal plate 1 and the second metal plate 2 separated by the slit 3 are electrically connected in high frequency. Thereby, unnecessary resonance by the slit 3 is suppressed. Further, the operating frequency f 0 of the frequency selection plate does not depend on the length of the slit 3 in the x-axis direction.
  • Embodiment 3 FIG. In the third embodiment, an example in which a plurality of cells are arranged one-dimensionally using the frequency selection plate of FIG. 1 or FIG. 4 as one cell will be described.
  • FIG. 5 is a block diagram showing a frequency selection plate according to Embodiment 3 of the present invention.
  • FIG. 5 shows an example in which the frequency selection plate of FIG. 4 is one cell and four cells are arranged in the x-axis direction. The four cells arranged in the x-axis direction are in close contact with adjacent cells.
  • FIG. 5 shows an example in which four cells are arranged, the number of arranged cells may be two or more, and is not limited to four.
  • the frequency selection plate of FIG. 4 is a single cell.
  • the frequency selection plate of FIG. 1 may be a single cell, and a plurality of cells may be arranged in the x-axis direction. .
  • each of the four cells can switch the phase of the passing radio wave for every two cells.
  • the frequency selection board of this Embodiment 3 can be used as a switch which switches the propagation direction of an electromagnetic wave, for example in a reflect array antenna and a transmit array antenna.
  • Embodiment 4 FIG. In the fourth embodiment, an example in which a plurality of cells are two-dimensionally arranged using the frequency selection plate of FIG. 1 or 4 as one cell will be described.
  • FIG. 6 is a block diagram showing a frequency selection plate according to Embodiment 4 of the present invention.
  • the leftmost cell group in the x-axis direction is SG 1
  • the second cell group from the left in the x-axis direction is SG 2
  • the third cell group from the left in the x-axis direction is SG 3
  • the fourth cell group from the left side is referred to as SG 4.
  • the phase switching unit 8 is not provided in all cells but is provided in cell group units. Therefore, one phase switching unit 8 is a phase switching unit common to three cells belonging to the same cell group, and sets the operating frequencies of the three cells to the same operating frequency. In the example of FIG. 6, since four cell groups SG 1 to SG 4 exist, four phase switching units 8 are provided.
  • FIG. 6 shows an example in which four cells are arranged in the x-axis direction and three cells are arranged in the y-axis direction.
  • the number of cells to be arranged is not limited to this. Three cells in the direction and four cells in the y-axis direction may be arranged, or six cells in the x-axis direction and five cells in the y-axis direction. Also good.
  • the frequency selection plate of FIG. 4 is a single cell, but the frequency selection plate of FIG. 1 is a single cell, and a plurality of cells are arranged in the x-axis direction and the y-axis direction. There may be.
  • the phase switching unit 8 since the phase switching unit 8 is provided for each cell group, the phase of the passing radio wave can be switched in units of two cell groups.
  • the frequency selection board of this Embodiment 4 can be used as a switch which switches the propagation direction of an electromagnetic wave, for example in a reflect array antenna and a transmit array antenna.
  • FIG. 7 is a block diagram showing another frequency selection plate according to Embodiment 4 of the present invention.
  • the frequency selective surface of Figure 7, the cell group SG 1, a ground line 12 is provided for connecting the connecting portion between the cell group SG 2 to the ground. Further, the cell group SG 3, ground lines 12 are provided for connecting the connecting portion between the cell group SG 4 to ground.
  • the number of plasma excitation power supplies 10 is three, and the cell group SG 2 and the cell group SG 3 use the same plasma excitation power supply 10 in common.
  • a plasma excitation power supply 10 of the leftmost in the x-axis direction the current supplied to the cell group SG 1 is such that I 1, first in the three cells belonging to the cell group SG 1 of by setting the voltage applied to the metal plate 1, the operating frequency of the three cells belonging to the cell group SG 1 is set to f 1.
  • cell groups SG in the three cells belonging to two second metal plate 2 setting a voltage to be applied, and a voltage applied to the first metal plate 1 in the three cells belonging to the cell group SG 3 to.
  • the operating frequency of the three cells belonging to the three cells and cell groups SG 3 belonging to the cell group SG 2 is in f 2.
  • one rightmost plasma excitation power supply 10 in the x-axis direction so that the current supplied to the cell group SG 4 is I 3, the second metal plate 2 in the three cells belonging to the cell group SG 4 by setting the voltage to be applied, the operating frequency of the three cells belonging to the cell group SG 4 is in f 3.
  • the ground line 12 is provided as shown in FIG. 7 and the two plasma groups commonly use the same plasma excitation power supply 10 if the number of cell groups arranged in the x-axis direction is further increased, two rows of cells
  • the operating frequency can be set for each group.
  • FIG. 8 is an explanatory view showing an analysis result of the electromagnetic field simulation.
  • FIG. 9 is an explanatory diagram showing an analysis model for electromagnetic field simulation.
  • FIG. 9A shows an analysis model of electromagnetic field simulation
  • FIG. 9B shows a cross section taken along line AA ′ of FIG. 9A. Since the slit 3 becomes conductive at a high frequency by the capacitor 11, the slit 3 is omitted in the analysis model of FIG.
  • the first electrode 6, the second electrode 7, and the wiring 9 are also omitted, and an infinite period boundary is applied around one cell in an infinite period state. Analyzing.
  • the analysis model of FIG. 9 shows an analysis model of electromagnetic field simulation
  • FIG. 9B shows a cross section taken along line AA ′ of FIG. 9A. Since the slit 3 becomes conductive at a high frequency by the capacitor 11, the slit 3 is omitted in the analysis model of FIG.
  • the first electrode 6, the second electrode 7, and the wiring 9 are also omitted, and an infinite period boundary is applied around
  • the outer dimension (dimension in the xy axis direction) of the first metal plate 1 and the second metal plate 2 is 0.7 ⁇ 0 ⁇ 0.7 ⁇ 0 .
  • the dimension in the xy axis direction of the dielectric case 4 is 0.41 ⁇ 0 ⁇ 0.1 ⁇ 0
  • the dimension in the z-axis direction of the dielectric case 4 is 0.1 ⁇ 0 .
  • the thickness of the outer frame is 1 mm.
  • the relative dielectric constant of the dielectric case 4 is 3.78.
  • radio waves are passed from the + z-axis direction to the -z-axis direction, and the characteristics of the reflected wave and transmitted wave of one cell are analyzed. Further, since the + z axis direction is defined as Port 1 and the ⁇ z axis direction is defined as Port 2, the reflection characteristic is S11 and the transmission characteristic is S21.
  • quartz that is often used in plasma discharge is used.
  • the polarization direction of the incident radio wave is the x-axis direction. Since the plasma is used in a region where it behaves as a dielectric, the relative dielectric constant ⁇ r of the plasma is changed in the range of 0.1 to 1 in the band including the operating frequency f 0 .
  • FIG. 8A shows the relationship between the operating frequency f 0 and the amplitude of S21
  • FIG. 8B shows the relationship between the operating frequency f 0 and the phase of S21
  • FIG. 8C shows the relationship between the relative permittivity ⁇ r and the phase of S21. Show.
  • the phase [deg] of S21 that is the passing phase changes by about 57 degrees.
  • the phase of S21 is about +32 degrees, and when the relative dielectric constant ⁇ r of the plasma is 1, the phase of S21 is about -25 degrees.
  • the operating frequency f 0 changes as shown in FIG. 8A by changing the phase [deg] of S21 which is the passing phase. Note that, as the operating frequency f 0 changes, the phase [deg] of S21 changes as shown in FIG. 8B.
  • the frequency selection plate of the fourth embodiment if the discharge currents of all the plasma excitation power supplies 10 are the same, it can be operated as a band-pass filter that transmits radio waves incident at the operating frequency. Further, in the frequency selection plate of FIG. 6, if the discharge currents of the respective plasma excitation power sources 10 are made different, the passing phase changes in units of two cell groups. Further, in the frequency selection plate of FIG. 7, if the discharge currents from the respective plasma excitation power sources 10 are made different, the passing phase is changed in units of two cell groups. For this reason, if the frequency selection plate of the fourth embodiment is used for a transmit array antenna, it is possible to refract radio waves.
  • FIG. 10 is a conceptual diagram showing a transmit array antenna.
  • the radio wave can be refracted in an arbitrary direction by adjusting the passage phase of the radio wave in each discharge tube.
  • the frequency selection plate of the fourth embodiment can be used as a switch for switching the propagation direction of radio waves in, for example, a reflect array antenna and a transmit array antenna.
  • Embodiment 5 FIG. In the fourth embodiment, an example is shown in which cells adjacent to each other in the x-axis direction are in close contact, but in this fifth embodiment, cells adjacent in the x-axis direction are connected via a capacitor. An example will be described.
  • FIG. 11 is a block diagram showing a frequency selection plate according to Embodiment 5 of the present invention.
  • Capacitor 13 has one end connected to the cell group SG 1, SG 2, SG 3 second metal plate 2 of the cell belonging to (one cell group), the other end cell group SG 2, SG 3, SG 4 It is connected to the first metal plate 1 of the cell belonging to (the other cell group).
  • the value of the capacitor 11 is set to 20 pF, for example.
  • the capacitor 13 that cuts off the current supplied from the plasma excitation power supply 10 since the capacitor 13 that cuts off the current supplied from the plasma excitation power supply 10 is connected, it is affected by the current supplied from the plasma excitation power supply 10 connected to the adjacent cell group.
  • the discharge current can be easily adjusted to a desired discharge current for each cell group.
  • the phase of the passing radio wave in each cell group can be set to a desired phase. This makes it possible to switch the phase of the passing radio wave at fine intervals. In other words, it is possible to switch the passage phase of radio waves incident at fine intervals. For this reason, if the frequency selection plate of the fifth embodiment is used for a transmit array antenna, for example, sharp directivity can be obtained when refracting radio waves.
  • Embodiment 6 FIG.
  • an example is shown in which one end of the wiring 9 of the phase switching unit 8 is connected to the first metal plate 1 and the other end of the wiring 9 is connected to the second metal plate 2.
  • an inductor 14 a is provided between the first metal plate 1 and one end of the wiring 9
  • an inductor 14 b is provided between the second metal plate 2 and the other end of the wiring 9.
  • FIG. 12 is a block diagram showing a frequency selection plate according to Embodiment 6 of the present invention.
  • the inductor 14 a has one end connected to the first metal plate 1 and the other end connected to one end of the wiring 9.
  • the inductor 14 b has one end connected to the second metal plate 2 and the other end connected to the other end of the wiring 9.
  • FIG. 13 shows an example in which a plurality of cells are two-dimensionally arranged with the frequency selection plate of FIG. 12 as one cell.
  • the value of the inductor 14a is set to a value at which the high-frequency current excited by the first metal plate 1 by the incident radio wave is blocked, but the current supplied from the plasma excitation power supply 10 flows.
  • the value of the inductor 14b is set to a value that blocks the high-frequency current excited by the second metal plate 2 by the incident radio wave and flows the current supplied from the plasma excitation power source 10.
  • the inductors 14a and 14b are connected. However, it is sufficient that the high-frequency current is interrupted and the current supplied from the plasma excitation power supply 10 can flow. Instead of the inductors 14a and 14b, resistors may be connected.
  • the frequency selection plate of FIG. 1 since the high frequency current excited by the first metal plate 1 and the second metal plate 2 flows through the wiring 9, unnecessary resonance may occur in the wiring 9.
  • the inductors 14a and 14b that cut off the high-frequency current excited by the first metal plate 1 and the second metal plate 2 are connected, the first metal plate 1 and the second metal plate 1 are connected.
  • the high frequency current excited by the metal plate 2 does not flow through the wiring 9. For this reason, unnecessary resonance generated in the wiring 9 can be suppressed.
  • the operating frequency f 0 of the frequency selection plate does not depend on the length of the wiring 9 and how it is turned.
  • the inductor 14a is provided between the first metal plate 1 and one end of the wiring 9, and the second metal plate 2 and the other end of the wiring 9 are connected. Since the inductor 14b is provided between the two, the unnecessary resonance generated in the wiring 9 can be suppressed, and the degree of freedom of the wiring 9 can be increased.
  • Embodiment 7 FIG. In the seventh embodiment, an example in which a plurality of cells arranged two-dimensionally in the z-axis direction, which is the incident direction of radio waves passing through the dielectric case 4, is multilayered will be described.
  • FIG. 14 is a block diagram showing a frequency selection plate according to Embodiment 7 of the present invention.
  • the same reference numerals as those in FIGS. 1 and 13 denote the same or corresponding parts, and the description thereof will be omitted.
  • FIG. 14 shows a cross section when a plurality of cells are multilayered in AA ′ of FIG.
  • FIG. 14 shows an example in which the number of layers is three, but the number of layers is not limited to three.
  • the passing phase changes by the set phase amount each time a radio wave incident from the + z-axis direction passes through the cells of each layer. To do. For this reason, in the frequency selection plate of FIG. 14, it is possible to widen the range of pass phases that can be set as compared with the frequency selection plate having one layer.
  • Embodiment 8 FIG. In this eighth embodiment, an example in which a reflecting plate 15 that reflects radio waves that have passed through a plurality of cells arranged in two dimensions is provided will be described.
  • FIG. 15 is a block diagram showing a frequency selection plate according to an eighth embodiment of the present invention
  • FIG. 16 is a cross-sectional view taken along the line AA ′ of the frequency selection plate of FIG. 15 and FIG. 16, the same reference numerals as those in FIGS.
  • the reflecting plate 15 is arranged in the ⁇ z-axis direction of the plurality of cells arranged two-dimensionally, and reflects the radio wave that has passed through the plurality of cells.
  • the passing phase changes.
  • the radio waves that have passed through the plurality of cells are reflected by the reflecting plate 15.
  • the radio wave reflected by the reflecting plate 15 is again incident on the plurality of cells arranged two-dimensionally, and the passing phase changes when passing through the plurality of cells arranged two-dimensionally.
  • the propagation direction of the reflected radio wave can be refracted, so that it can be used as, for example, a reflectarray antenna.
  • the present invention is suitable for a frequency selection plate that switches the phase of a radio wave that passes therethrough.

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  • Aerials With Secondary Devices (AREA)

Abstract

La présente invention comprend : un boîtier diélectrique (4) qui est disposé à l'intérieur d'une fente (20) formée par une première encoche (1a) et une seconde encoche (2a), et dans lequel est contenu un gaz ionisant (5) ; une première électrode (6) qui pénètre dans le boîtier diélectrique (4) de sorte qu'une de ses extrémités est en contact avec le gaz ionisant (5) et son autre extrémité est en contact avec une première plaque métallique (1) ; et une seconde électrode (7) qui pénètre dans le boîtier diélectrique (4) de sorte qu'une de ses extrémités est en contact avec le gaz ionisant (5) et son autre extrémité est en contact avec une seconde plaque métallique (2). Une partie de commutation de phase (8) est configurée pour provoquer la transition du gaz ionisant (5) vers un état de plasma par application d'une tension entre la première plaque métallique (1) et la seconde plaque métallique (2), et pour commuter les phases d'ondes radio qui passent à l'intérieur du boîtier diélectrique (4) en faisant varier la tension.
PCT/JP2017/004745 2017-02-09 2017-02-09 Plaque de sélection de fréquence Ceased WO2018146773A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN113381194A (zh) * 2020-12-25 2021-09-10 中国航空工业集团公司沈阳飞机设计研究所 一种频率选择吸波体

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US20120037420A1 (en) * 2010-08-16 2012-02-16 The Boeing Company Electronic device protection
JP2013225797A (ja) * 2012-04-23 2013-10-31 Mitsubishi Electric Corp 周波数選択板
JP2016048901A (ja) * 2014-08-28 2016-04-07 三菱電機株式会社 アレーアンテナ装置

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US9559426B1 (en) * 2013-04-23 2017-01-31 Imaging Systems Technology, Inc. Frequency selective surfaces

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Publication number Priority date Publication date Assignee Title
US20120037420A1 (en) * 2010-08-16 2012-02-16 The Boeing Company Electronic device protection
JP2013225797A (ja) * 2012-04-23 2013-10-31 Mitsubishi Electric Corp 周波数選択板
JP2016048901A (ja) * 2014-08-28 2016-04-07 三菱電機株式会社 アレーアンテナ装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113381194A (zh) * 2020-12-25 2021-09-10 中国航空工业集团公司沈阳飞机设计研究所 一种频率选择吸波体
CN113381194B (zh) * 2020-12-25 2023-06-02 中国航空工业集团公司沈阳飞机设计研究所 一种频率选择吸波体

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JPWO2018146773A1 (ja) 2019-04-11

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