CN102956939A - Double-frequency waveguide tube - Google Patents

Abstract

A dual-frequency waveguide includes an outer waveguide for receiving satellite signals of a lower frequency band, and an inner waveguide for receiving satellite signals of a higher frequency band. The outer waveguide has a first waveguide space with one end open and the other end closed, and the inner waveguide is fixed to the outer waveguide and has a second waveguide space with a dielectric material waveguide member coaxially plugged at one end, and at least a portion of the second waveguide space is coaxially located in the outer waveguide with the first waveguide space. Thereby, when the dual-frequency waveguide is mounted on a dish antenna, the first and second waveguide spaces of the outer and inner waveguides can be coaxially arranged at the reflection focus position of the dish antenna to respectively receive satellite signals of different frequency bands.

Description

Dual frequency waveguide

technical field

The present invention relates to a waveguide (feed horn) which is set up at the reflective focus position of a dish antenna and is used to receive satellite signals of a specific frequency band, and particularly relates to a waveguide (feed horn) which is used to receive satellite signals of two different frequency bands (such as Ku frequency band signals) respectively. (Ku band signal) and S band signal (S band signal)) and a dual-frequency waveguide with an inner waveguide and an outer waveguide coaxially arranged.

Background technique

In the process of transmitting and receiving satellite signals, the feed horn is a kind of signal used to receive the signal sent by the satellite, and feed the received satellite signal to a signal processor (such as a low noise frequency reducer ( loW noise block downconvertor), hereinafter referred to as LNB), when the waveguide is used with a parabolic dish antenna (parabolic dish), the best setting position of the waveguide is at the reflection focus position of the dish antenna , at this time the waveguide can most effectively receive the satellite signal reflected by the dish antenna.

Early satellite TV signals sent by a single satellite were received by a set of satellite signal receiving devices including a dish antenna, a waveguide and an LNB. To receive satellite signals from two satellites, you need Utilize two groups of satellite signal receiving devices to achieve. If the user wants to receive different satellite signals from two nearby satellites at the same time, or two different frequency satellite signals from the same satellite, for example, one is the S-band and the other is the Ku-band satellite signal, the current practice Two waveguides that receive different satellite signals are arranged side by side on the same dish antenna. However, waveguides occupy a certain space, and waveguides that receive different wave frequencies have different calibers, such as receiving S-band The caliber of the waveguide is much larger than the caliber of the waveguide for receiving the Ku frequency band, and the focusing range of the dish antenna has a certain limit. Therefore, the current practice of setting two waveguides side by side on the same dish antenna will Because the two waveguides cannot be set at the reflection focus of the dish antenna at the same time, the satellite signal intensity received by each waveguide is reduced. Secondly, the parallel waveguides have a relatively large volume, which relatively increases the shielding rate of the effective signal receiving area of the dish antenna. In other words, how to install two waveguides that can effectively receive satellite signals of two different frequency bands from adjacent satellites or the same satellite in the limited space of the dish antenna is a problem that the industry is trying to solve.

Contents of the invention

In view of this, one object of the present invention is to provide a dual-frequency waveguide, which has a first waveguide space and a second waveguide space coaxially arranged to receive satellite signals of different frequency bands respectively, so as to When the dual-frequency waveguide is erected on a dish antenna, the first and second waveguide spaces can correspond to the reflective focus of the dish antenna at the same time, so as to achieve good satellite signal reception effect.

Another object of the invention is to provide a dual-frequency waveguide having a first and a second waveguide arranged substantially coaxially so as to have a smaller volume.

To achieve the above object, a dual-frequency waveguide provided by the present invention includes an outer feedhorn for receiving and feeding a first satellite signal to a low-noise frequency reducer, and an outer feedhorn for To receive and feed a second satellite signal to an inner feed horn of a low noise frequency reducer, wherein the frequency of the second satellite signal is higher than the frequency of the first satellite signal. The outer waveguide has a first waveguide space, a horizontally polarized probe and a vertically polarized probe, and these probes respectively protrude into the first waveguide space and project on the first waveguide On a transverse section of the space, they appear perpendicular to each other. The inner waveguide has a tube body, a dielectric waveguide arranged at one end of the tube body, a base connected to the other end of the tube body, a dielectric waveguide, the The second wave guiding space defined by the pipe body and the base, and a horizontally polarized probe and a vertically polarized probe that are perpendicular to each other when projected on a transverse section of the second wave guiding space. The base is connected to the outer waveguide in such a way that at least a part of the tube body and the dielectric material waveguide can be located in the outer waveguide coaxially with the first waveguide space. Thereby, when the dual-frequency waveguide is erected on a dish antenna, the coaxially arranged first waveguide space and the second waveguide space can align the reflection focus of the dish antenna at the same time, and effectively receive the second waveguide respectively. A satellite signal and a second satellite signal. Secondly, since the waveguide made of dielectric material of the inner waveguide is coaxially arranged in the outer waveguide, the overall volume of the dual-frequency waveguide of the present invention can be effectively reduced, thereby reducing the Type antenna for the purpose of shielding satellite signals.

In the dual-frequency waveguide provided by the present invention, the first satellite signal is preferably (but not limited to) S band (S band) satellite signal, and the second satellite signal is preferably (but not limited to) Ku Frequency band (Ku band) satellite signal.

In the dual-frequency waveguide provided by the present invention, the outer waveguide may include an open end and a closed end with a central perforation, and the aforementioned first waveguide space is between the open end between the end and the closed end. And the base of the inner waveguide is fixed on the closed end, and the tube body of the inner waveguide passes through the central hole of the closed end, and at least a part of it is coaxial with the first waveguide space and is located at the first waveguide. In a guided wave space.

Preferably, the base of the inner waveguide is provided with an arc-shaped slot, and the inner waveguide passes through a fixing piece that passes through the arc-shaped slot of the base and is combined with the closed end of the outer waveguide ( Such as screws or other suitable components) are combined with the outer waveguide. In this way, the base can be rotated and positioned relative to the outer waveguide within the range of the arc-shaped slot to adjust the azimuth of the inner waveguide body relative to the outer waveguide, so that the inner waveguide The tube is effectively capable of receiving the second satellite signal.

In an embodiment provided by the present invention, the outer waveguide is composed of a wave collecting part with the aforementioned open end, and a tube body connected with the wave collecting part and having the aforementioned closed end. However, the waveguide is not limited to the aforementioned structure, for example, the outer waveguide may be an integrally formed pipe.

Preferably, the outer waveguide includes a wave collecting portion and a body, the pipe body has an open end connected to the wave collecting portion, and a closed end with a central perforation; the inner waveguide The base of the inner waveguide is fixed to the closed end, and the tube system of the inner waveguide passes through the central perforation of the closed end and at least a part is located on the outer waveguide coaxially with the tube body of the outer waveguide in the tube body.

In the present invention, the structure of the wave-collecting part of the outer waveguide is not particularly limited. For example, the wave-collecting part may include a set of fixing rings set and fixed on the open end of the body of the outer waveguide, and a A guide part extending outward in a trumpet shape from the outer peripheral surface of the fixing ring.

Alternatively, the wave collecting part may include a fixing ring set and fixed on the open end of the body of the outer waveguide, and at least one annular guide part surrounding the outer peripheral surface of the fixing ring.

Preferably, at least a part of the waveguide made of dielectric material of the inner waveguide is located in the above-mentioned guiding portion of the wave collecting portion. That is, the dielectric material waveguide is disposed close to the inlet end of the wave collecting part so as to effectively guide the second satellite signal.

In an embodiment provided by the present invention, the inner surface of the closed end of the outer waveguide forms a reflective surface, and the horizontally polarized probe and the vertically polarized probe of the outer waveguide are respectively Protrude in the tube body of the outer waveguide, and the distance between any one of them and the reflecting surface is 2N+1 times of the quarter wavelength of the satellite signal that the outer waveguide is intended to receive (N is positive integer). For example, one of the distances may be (but not limited to) 1/4λ or 3/4λ, and the other distance may be (but not limited to) 1/4λ or 3/4λ. Here "λ" represents the wavelength of the received satellite signal.

Preferably, the horizontally polarized probes protruding from the body of the outer waveguide and the vertically polarized probes are not located on the same plane. For example, the distance between one probe and the reflective surface is 3/4λ, and the distance from the other is 1/4λ.

In an embodiment provided by the present invention, the base of the inner waveguide has an accommodating space, which coaxially communicates with the inner space of the body of the inner waveguide, and is connected to the inner space of the inner waveguide. The inner space of the body together forms the second waveguide space. However, the structure of the second waveguide space is not limited to the foregoing embodiments, for example, the second waveguide space may be completely formed by the inner space of the inner waveguide body.

In the embodiment mentioned in the preceding paragraph, the base of the inner waveguide has a reflective surface located at the bottom of its accommodating space, and the horizontally polarized probe and the vertically polarized probe of the inner waveguide protrude respectively in the accommodating space of the base, and the distance between one of them and the reflection surface of the base is 1/4 wavelength of the satellite signal that the inner waveguide is intended to receive.

Preferably, a reflector protrudes from the accommodating space of the base of the inner waveguide, the reflector is located between the horizontally polarized probe and the vertically polarized probe, and is closer to the inner waveguide The distance between the one of the two probes of the tube body is a quarter wavelength of the satellite signal that the inner waveguide is intended to receive.

In one embodiment of the present invention, the waveguide made of dielectric material of the inner waveguide has an outer end and an inner end opposite to the outer end and plugged into the body of the inner waveguide. department.

Preferably, the outer end of the dielectric material waveguide has a central cone, an annular portion coaxially surrounding the periphery of the central cone, and an annular portion between the central cone and the central cone. Annular groove between rings. In this way, a good side wave suppression effect is achieved.

Preferably, the inner end of the waveguide made of dielectric material has a central cone, an annular portion coaxially surrounding the periphery of the central cone, and an annular portion between the central cone and the ring. An annular groove between the shape parts, and a fixing ring coaxially surrounding the periphery of the ring part with the central cone part, the fixing ring is plugged in the body of the inner waveguide.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is a perspective view of a dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 2 is a perspective view of another viewing direction of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 3 is a three-dimensional exploded view of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 4 is a longitudinal sectional view of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 5 is a longitudinal sectional view of the inner waveguide base of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Figure 6 is a partial end view of the base of the inner waveguide;

Fig. 7 is a perspective view of the dual-frequency waveguide provided by the second preferred embodiment of the present invention;

Fig. 8 is a perspective view of the dual-frequency waveguide provided by the third preferred embodiment of the present invention;

FIG. 9 is a three-dimensional exploded view illustrating another possible embodiment of the base of the inner waveguide.

Among them, reference signs

10 dual-frequency waveguide 20 external waveguide

20a open end 20b closed end

20c The first guided wave space 22 Wave collecting part

22a fixed ring 22b first annular guide part

22c second ring guide part 24 tube body

24a Open End 24b Center Piercing

24c closed end 24d inner surface

Horizontal Polarization Probes 26 Vertical Polarization Probes 28

Base 29 30 inner waveguide

30a second waveguide space 32 pipe body

34 Dielectric material waveguide 34a outer end

34a1 central cone 34a2 ring

34a3 annular groove 34b inner end

34b1 central cone 34b2 ring

34b3 ring groove 34b4 retaining ring

36 base 36a accommodation space

36b reflective surface 36c flange

36d arc-shaped slotted hole 36e thread

36f screw 38, 38'horizontal polarization probe

40, 40' vertically polarized probe 42 reflectors

44 circuit board

Detailed ways

The technical contents and features of the present invention will be described in detail below in conjunction with the accompanying drawings through the enumerated embodiments, wherein:

Fig. 1 is a perspective view of a dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 2 is a perspective view of another viewing direction of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 3 is a three-dimensional exploded view of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 4 is a longitudinal sectional view of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Fig. 5 is a longitudinal sectional view of the inner waveguide base of the dual-frequency waveguide provided by the first preferred embodiment of the present invention;

Figure 6 is a partial end view of the base of the inner waveguide;

Fig. 7 is a perspective view of the dual-frequency waveguide provided by the second preferred embodiment of the present invention;

Fig. 8 is a perspective view of the dual-frequency waveguide provided by the third preferred embodiment of the present invention; and

FIG. 9 is a three-dimensional exploded view illustrating another possible embodiment of the base of the inner waveguide.

Please refer to Fig. 1 to Fig. 7, the dual-frequency waveguide 10 provided by the first preferred embodiment of the present invention mainly includes an outer waveguide for receiving and feeding a first satellite signal to a low-noise frequency reducer tube 20, and an inner waveguide 30 for receiving and feeding a second satellite signal to another low-noise frequency reducer, wherein the frequency of the second satellite signal is higher than the frequency of the first satellite signal, for example The first satellite signal is a lower frequency band radio frequency satellite signal such as the S band, and the second satellite signal is a higher frequency radio frequency satellite signal such as the Ku band. However, the types of the first and second satellite signals are not limited to the foregoing.

The outer waveguide 20 has an open end 20a, a closed end 20b, and a first waveguide space 20c between the open end 20a and the closed end 20b. In detail, the outer waveguide 20 is mainly composed of a wave collecting portion 22 having the aforementioned open end portion 20a, and a cylindrical tube body 24 connected with the wave collecting portion 22 and having the aforementioned closed end portion 20b. In this way, the inner space of the tube body 24 can form the aforementioned first wave guiding space 20c, or the inner space of the tube body 24 and the inner space of the wave collecting part 22 can together define the aforementioned first wave guiding space 20c. However, the outer waveguide 20 is not limited to the aforementioned structure, for example, the outer waveguide 20 may be an integrally formed tube. Secondly, a horizontally polarized probe 26 and a vertically polarized probe 28 are arranged in the tube body 24, and these probes 26, 28 pass through the tube wall of the tube body 24 vertically and protrude from the tube body 24 respectively. In the first waveguide space 20c, and when the probes 26, 28 are projected on a transverse section of the first waveguide space 20c (for example, when on the bottom of the pipe body), they are perpendicular to each other, for Respectively receive two kinds of electromagnetic waves whose electric field vibration directions are perpendicular to each other in the same frequency band. In addition, an LNB base 29 for processing the first satellite signal is fixed on the outer peripheral surface of the tube, and an LNB electronic circuit ( not shown in the figure). It should be noted here that the location of the LNB is not limited to the above, and the working principle of the probes 26 , 28 and the LNB belongs to the prior art, so it will not be repeated here.

In further words, the wave collecting part 22 has a fixing ring 22a fixed on the open end 24a of the tube body 24 of the outer waveguide 20, and a first ring 22a which surrounds the outer peripheral surface of the fixing ring 22a and whose diameter increases sequentially. The ring guide part 22b and the second ring guide part 22c. However, the structural features of the wave collecting unit 22 can be changed into rectangular, circular, or elliptical shapes depending on the type of polarization required to receive the first satellite signal, such as linear polarization, circular polarization, or elliptical polarization. Or it gradually changes from an elliptical outline to a circular shape, so it is not limited to the circular structure of receiving circular polarization; and the structural size is designed according to the specifications of its signal gain or side wave suppression bandwidth, so it is not limited to this The coaxial double-ring structure is limited, for example, taking the dual-frequency waveguide 10 provided by the second preferred embodiment of the present invention disclosed in the seventh figure as an example, the wave collecting part 22 is only provided with a ring-shaped guiding part 22b , or, as disclosed in the eighth figure, the dual-frequency waveguide 10 provided by the third preferred embodiment of the present invention is an example, the wave collecting part 22 has a trumpet-shaped extension from the outer peripheral surface of its fixing ring 22a (also That is, the diameter gradually expands) the guide portion 22b. In other words, the aforementioned wave collecting parts of various shapes or wave collecting parts of other shapes can be applied to the dual-frequency waveguide 10 provided by the present invention.

Secondly, the tube body 24 is basically a cylindrical tube body with one end open and the other end closed. In detail, the tube body 24 has an open end 24a connected to the wave collecting portion 22, a closed end 24c having a central through hole 24b (forming the closed end 20b of the outer waveguide 20), And a cylindrical inner space between the open end 24a and the closed end 24c. Secondly, the inner surface 24d of the closed end of the tube forms a reflective surface, and the distance between the horizontally polarized probe 26 and the vertically polarized probe 28 of the outer waveguide and the reflective surface 24d is predetermined. Odd multiples (2N+1 times, N is a positive integer) of a quarter of the wavelength of the received first satellite signal; of course, in order to maintain the isolation between vertical and horizontal polarization signals, and based on signal strength and space saving Considering that the distances between the horizontally polarized probe 26 and the vertically polarized probe 28 and the reflective surface 24d are respectively three-quarters and one-fourth of the wavelength of the first satellite signal to be received, that is, 3/4λ and 1/4 lambda. In other words, when the probes 26 , 28 protrude into the inner space of the tube body 24 , there is a difference in height and they are not on the same plane.

The inner waveguide 30 mainly includes a cylindrical tube body 32 with two ends open, a dielectric material waveguide (dielectric waveguide) 34 arranged at one end of the tube body 32, and a tube connected to the tube body 32. One end is fixed to the base 36 of the closed end 24c of the outer waveguide 20 body 24, whereby the dielectric material waveguide 34, the inner space of the tube body 32 and the base 36 can define a first Two waveguide spaces 30a.

In this embodiment, the base 36 of the inner waveguide 30 can be realized by using the base of the LNB for processing the second satellite signal. In other words, the base 36 is used to connect the outer waveguide 20 and support the tube The body 32 and the dielectric material waveguide 34 are located outside the first waveguide space 20c, and the electronic circuit of the LNB (not shown in the figure) can still be accommodated in the base. On the other hand, the base 36 has a cylindrical accommodating space 36a, which communicates coaxially with the inner space of the tube body 32 of the inner waveguide 30, and is connected with the inner space of the inner waveguide body 32. Together, the second waveguide space 30a is formed. However, the structure defining the second waveguide space 30a is not limited to the above-mentioned embodiments, for example, the second waveguide space 30a can be completely formed by the inner space of the tube body 32 of the inner waveguide.

Secondly, the inner waveguide 30 also includes a horizontally polarized probe protruding from the second waveguide space 30a and projected on a transverse section of the second waveguide space 30a to be perpendicular to each other. 38 and a vertically polarized probe 40 . Specifically, the base 36 of the inner waveguide 30 has a reflective surface 36b located at the bottom of the accommodating space 36a, and the horizontally polarized probe 38 and the vertically polarized probe 40 of the inner waveguide 30 are Protrude respectively in the accommodating space 36a of the base 36, and are relatively close to the reflective surface 36b of the base 36 (such as the vertically polarized probe 40 in this embodiment) and the distance from the reflective surface 36b is the predetermined reception Odd multiples of 1/4 of the wavelength of the second satellite signal are 1/4 of the wavelength of the second satellite signal, ie 1/4λ, in consideration of signal strength and space saving. In addition, a reflective member 42 is further provided between the horizontally polarized probe 38 and the vertically polarized probe 40, and the distance between the reflective member 42 and the horizontally polarized probe 38 is 1/4λ, same as the above-mentioned Considering signal strength and space saving, the vertically polarized probe 40 is used to enhance the signal reflection effect of horizontally polarized electromagnetic waves. In other words, when the probes 38 and 40 protrude into the second wave guiding space 30a, there is a difference in height and they are not on the same plane. However, the configurations of the probes 38 and 40 are not limited to the above. For example, please refer to FIG. 9, which is another feasible inner waveguide provided by the applicant of this case in Taiwan Patent Publication No. 511783 An exploded perspective view of an embodiment of the base 36 ′, wherein the horizontally polarized probe 38 ′ and the vertically polarized probe 40 ′ are built on the circuit board 44 of the LNB and are located on the same horizontal plane.

In addition, referring to FIG. 2 and FIG. 4 to FIG. 6, the base 36 has a circular flange 36c, and a plurality of arc-shaped slots 36d passing through the flange 36c in an equiangular manner, and the accommodating The wall surface of the inlet end of the housing space 36a is provided with a screw thread 36e. In this way, the base 36 can be engaged with the tube body 32 through the thread 36e, and through the arc-shaped slot holes 36d of the base and locked to the closed end 20b of the outer waveguide 20, such as Fasteners such as screws 36f enable the base 36 and the outer waveguide 20 to be fixed to each other. At this time, the tube body 32 of the inner waveguide 30 passes through the central perforation 24b of the closed end 20b of the outer waveguide 20, and is supported in the first waveguide space together with the dielectric material waveguide 34 The axial center position of 20c, that is, coaxially suspended in the tube body 24 of the outer waveguide 20 . In addition, through the design of the arc-shaped slot 36d, when the base 36 is fixed on the closed end 20b of the outer waveguide 20, the base 36 can be defined by the left and right ends of the arc-shaped slot 36d. Rotate coaxially relative to the outer waveguide 20 within a certain range to a specific azimuth angle corresponding to the second satellite signal transmitting end, and then fix the position of the base 36 by screws 36f to ensure that the horizontal polarization probe 38 is aligned with the vertical pole. The chemical probe 40 is effective to receive the second satellite signal. In other words, through the design of the arc-shaped slot 36d, the dual-frequency waveguide 10 provided by the present invention can adjust the azimuth angle of the tube body 32 of the inner waveguide 30 relative to the outer waveguide 20, so that the inner waveguide 30 The waveguide 30 is effective for receiving satellite signals. The design that the azimuth angle of the inner waveguide 30 can be adjusted is especially suitable for the situation that the first and second satellite signals are sent by two different but similar satellites. If the first and second satellite signals are sent by the same satellite, the aforementioned adjustment mechanism may not be provided, and the base 36 is directly fixed on the outer waveguide 20, for example, the base 36 shown in Figure 9 is used 'design, the horizontal polarized probe 38' and the vertical polarized probe 40' are built on the circuit board 44, and the base 36' is directly connected to the base 36' through the through hole of the flange of the base by means of screws (not shown in the figure). fixed on the outer waveguide 20.

The dielectric material waveguide 34 of the inner waveguide 30 is used to guide high-frequency satellite signals, because the waveguide 34 is made of such as polycarbonate (polycarbonate), polyethylene (polyethylene), polypropylene (polypropylene) ), polystyrene (polystyrene) and acrylonitrile-butadiene-styrene (acrylonitrile-butadiene-styrene) and other dielectric materials, so for the low-frequency satellite received by the outer waveguide 20 Signals have no effect. Structurally, the dielectric material waveguide 34 has an outer end 34a and an inner end 34b opposite to the outer end 34a and plugged in the body 32 of the inner waveguide 30, so as to guide Leading the second satellite signal into the second waveguide space 30a. Furthermore, the outer end portion 34a has a central cone portion 34a1, an annular portion 34a2 coaxially surrounding the central cone portion 34a1, and an annular portion 34a2 between the central cone portion 34a1 and the central cone portion 34a1. An annular groove 34a3 between the annular portions 34a2. Through the design of the annular portion 34a2 and the annular groove 34a3, a good side wave suppression effect can be achieved. Similarly, the inner end portion 34b of the dielectric material waveguide 34 has a central cone portion 34b1, an annular portion 34b2 coaxially surrounding the central cone portion 34b1 and a circular portion 34b2 located at the An annular groove 34b3 between the central cone portion 34b1 and the annular portion 34b2, and a fixing ring 34b4 coaxial with the central cone portion 34b1 surrounds the periphery of the annular portion 34b2. During assembly, the fixing ring 34b4 is plugged into the body 32 of the inner waveguide 30 so that the waveguide 34 made of dielectric material can be coaxially connected with the body 32 . At this time, a part of the dielectric material waveguide 34 is located in the guide portion 22 b of the wave collecting portion 22 . That is, the dielectric material waveguide 34 is disposed close to the entrance of the wave collecting part 22 to effectively guide the second satellite signal. However, the structural features of the outer end portion 34a and the inner end portion 34b of the dielectric waveguide 34 depend on the type of polarization required to receive the second satellite signal, such as linear polarization, circular polarization, or elliptical polarization. Different shapes can be changed into rectangle, circle, ellipse or those gradually turning from ellipse to circle, so it is not limited to the ring structure of receiving circular polarization; and it depends on its signal gain or side wave suppression frequency The structural size is designed for wide specifications, so it is not limited to the number of two rings of the ring parts 34a2, 34b2 of this coaxial double ring structure.

Through the above structural design, due to the manner in which the base 36 is fixed on the closed end 20b of the outer waveguide 20, the body 32 of the inner waveguide 30 and the waveguide 34 made of dielectric material can be connected with the The first waveguide space 20c is coaxially located in the outer waveguide 20. Therefore, when the dual-frequency waveguide 10 provided by the present invention is erected on a dish antenna (not shown in the figure), the coaxial arrangement The first wave guiding space 20c and the second wave guiding space 30a can be aligned with the reflection focus of the dish antenna at the same time, and effectively receive the first satellite signal and the second satellite signal respectively. Secondly, since the dielectric material waveguide 34 of the inner waveguide 30 is coaxially arranged in the outer waveguide 20 with the tube body 32, it is different from the conventional dual-frequency waveguide arranged in parallel. In comparison, the dual-frequency waveguide 10 of the present invention has a smaller overall volume.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (17)

1. a double frequency waveguide pipe is characterized in that, includes:

One outer waveguide pipe has one first guided wave space, and is stretched on respectively in this first guided wave space and presents a horizontal polarization probe and a perpendicular polarization probe of mutual vertical configuration when being projected on the lateral cross section in this first guided wave space; And

One interior waveguide pipe, have base, that dielectric material wave guide, that a body, is arranged at this body one end is connected in this body other end by this dielectric material wave guide, this body and the second guided wave space that this base defined out, and the horizontal polarization probe and the perpendicular polarization probe that present mutual vertical configuration when being projected on the lateral cross section in this second guided wave space; This base is connected in this outer waveguide pipe, and at least a portion of this base, this body and this dielectric material wave guide are coaxial with this first guided wave space, and at least a portion of this body and this dielectric material wave guide are arranged in this outer waveguide pipe.

2. double frequency waveguide pipe according to claim 1 is characterized in that, this outer waveguide pipe is in order to receiving one first satellite-signal, and should in waveguide pipe in order to receiving one second satellite-signal, and the frequency of this second satellite-signal is greater than this first satellite-signal.

3. double frequency waveguide pipe according to claim 1 is characterized in that, this outer waveguide pipe includes the closed end that an open end, has a central hole, and aforementioned the first guided wave space between this open end and this closed end; And the base of waveguide pipe is fixed in this closed end in being somebody's turn to do, and the body of waveguide pipe passes the central hole of this closed end and has at least a part and this first guided wave space to be arranged in coaxially this first guided wave space in being somebody's turn to do.

4. double frequency waveguide pipe according to claim 3, it is characterized in that, should in the base of waveguide pipe have a circular-arc slotted eye, and should in waveguide pipe pass the circular-arc slotted eye of this base by one and the fixture of being combined with waveguide pipe closed end outside this and outside with this waveguide pipe mutually combine.

5. double frequency waveguide pipe according to claim 3 is characterized in that, this outer waveguide pipe includes a collection ripple section with aforementioned open end, and one is connected and has the body of aforementioned closed end with this collection ripple section.

6. double frequency waveguide pipe according to claim 1 is characterized in that, this outer waveguide pipe includes:

One collection ripple section, and

One body has an open end that is connected with this collection ripple section, and a closed end with a central hole; Should in the base of waveguide pipe be fixed in this closed end, and should in the body of waveguide pipe pass the central hole of this closed end and have at least a part and body that should outer waveguide pipe to be arranged in coaxially the body of this outer waveguide pipe.

7. double frequency waveguide pipe according to claim 6 is characterized in that, this collection ripple section includes the retainer ring of the open end of a sheathed body that is fixed in this outer waveguide pipe, and a guidance part from the outside horn-like extension of this retainer ring outer peripheral face.

8. double frequency waveguide pipe according to claim 6 is characterized in that, this collection ripple section includes the retainer ring of the open end of a sheathed body that is fixed in this outer waveguide pipe, and at least one ring-type guidance part that is surrounded on this retainer ring outer peripheral face.

9. according to claim 7 or 8 described double frequency waveguide pipe, it is characterized in that, dielectric material wave guide of waveguide pipe has at least a part to be arranged in the guidance part of this collection ripple section in this.

10. double frequency waveguide pipe according to claim 6, it is characterized in that, be somebody's turn to do the inner surface of the body closed end of outer waveguide pipe, form a reflecting surface, and horizontal polarization probe and perpendicular polarization probe that should outer waveguide pipe be stretched on respectively in the body of this outer waveguide pipe, and any one is quarter-wave 2N+1 times (N is positive integer) of this outer waveguide pipe satellite-signal of being scheduled to reception with the distance of this reflecting surface.

11. double frequency waveguide pipe according to claim 10 is characterized in that, the horizontal polarization probe and the perpendicular polarization probe that are stretched on respectively in the body of this outer waveguide pipe are positioned on the Different Plane.

12. double frequency waveguide pipe according to claim 1, it is characterized in that, the base of waveguide pipe has an accommodation space in being somebody's turn to do, the coaxial inner space that is communicated with accordingly the body of waveguide pipe in this, and the inner space of the body of the accommodation space of this base and this interior waveguide pipe forms this second guided wave space.

13. double frequency waveguide pipe according to claim 12, it is characterized in that, should in the base of waveguide pipe have a reflecting surface that is positioned at its accommodation space bottom, and should in horizontal polarization probe and the perpendicular polarization probe of waveguide pipe be stretched on respectively in the accommodation space of this base, and one of them be the quarter-wave that this interior waveguide pipe is scheduled to the satellite-signal of reception with the distance of the reflecting surface of this base.

14. double frequency waveguide pipe according to claim 13, it is characterized in that, go back projection in being somebody's turn to do in the accommodation space of the base of waveguide pipe one reflecting element is arranged, this reflecting element between this horizontal polarization probe and perpendicular polarization probe, and with the distance near this two one of them probe of the body of waveguide pipe in this comparatively be the quarter-wave of the predetermined satellite-signal that receives of waveguide pipe in this.

15. double frequency waveguide pipe according to claim 1 is characterized in that, the dielectric material wave guide of waveguide pipe has an outer end and relative with this outer end and be arranged in the inner end of the body of this waveguide pipe in this.

16. double frequency waveguide pipe according to claim 15, it is characterized in that, the outer end of this dielectric material wave guide have tapering, a center, one and this tapering, center be centered around coaxially the annulus of this tapering, center periphery, and a annular recess between this tapering, center and this annulus.

17. double frequency waveguide pipe according to claim 16, it is characterized in that, the inner end of this dielectric material wave guide have tapering, a center, one and the tapering, center of this inner end be centered around coaxially the annulus, of tapering, the center periphery of this inner end at the tapering, center of this inner end and the annular recess between this annulus, and one and the tapering, center of this inner end be centered around coaxially the retainer ring of the annulus periphery of this inner end, this fixedly ring taps be located in the body of waveguide pipe in this.

Images