CN102610921B - Ku/Ka two-waveband transmitting-receiving share feed source - Google Patents

Ku/Ka two-waveband transmitting-receiving share feed source Download PDF

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CN102610921B
CN102610921B CN201210066824.XA CN201210066824A CN102610921B CN 102610921 B CN102610921 B CN 102610921B CN 201210066824 A CN201210066824 A CN 201210066824A CN 102610921 B CN102610921 B CN 102610921B
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waveband
transmit
wave band
receive
coaxial
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CN102610921A (en
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杨智友
徐利军
王恒
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BEIJING TIANGONG KAIZHENG TECHNOLOGY Co Ltd
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BEIJING TIANGONG KAIZHENG TECHNOLOGY Co Ltd
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Abstract

The invention provides a Ku/Ka two-waveband transmitting-receiving share feed source, which comprises a Ku waveband transmitting-receiving system and a Ka waveband transmitting-receiving system, wherein the Ku waveband transmitting-receiving system comprises a Ku radiation end, a stepped choke ring, a coaxial connecting piece, a Ku waveband coaxial orthomode coupler and a Ku waveband receiving-end filter which are connected in sequence; the Ka waveband transmitting-receiving system and the Ku waveband transmitting-receiving system are nested coaxially; and the Ka waveband transmitting-receiving system comprises a dielectric rod structure, a dielectric circular polarizer, a Ka waveband orthomode coupler and a Ka waveband receiving-end filter which are connected in sequence. According to the Ku/Ka two-waveband transmitting-receiving share feed source provided by the invention, a Ku wave receiving-end standing wave is less than 1.4, the cross polarization is less than -30dB, a transmitting-end standing wave is less than 1.3, the cross polarization is less than -23dB, the transmitting-receiving isolation is less than -110dB, a Ka wave receiving-end standing wave is less than 1.8, a transmitting-end standing wave is less than 1.7, the axial ratio is less than 1.8, and the transmitting-receiving isolation is less than -82dB.

Description

Ku/Ka two waveband transmit-receive sharing feed
Technical field
The present invention relates to antenna feed field in Wireless microwave communication, relate more specifically to Ku/Ka two waveband transmit-receive sharing feed.
Background technology
In the last few years, satellite communication was rapid at commercial field and military field development, and purposes is more and more various.Traditional C-band S-band can not meet the demand of Modern Satellite communication.Recently, TV, communication and navigation field have proposed new concept: direct broadcasting satellite, makes user directly obtain satellite-signal and by other intermediary system.This requires the cost of satellite communication antena system lower, and integrated level is higher, and miniaturization more.
If improve the performance of antenna system, first need to have high performance antenna feed.
The people such as U.S. John Joseph Hanlin are called the U.S. Patent No. 6 of " Dual Band Satellite Communications Antenna Feed " in name, 720, in 933B2, introduced a kind of coaxial nested Ku/Ka dual-band antenna feed, its inside is the dielectric antenna that Ka wave band circular waveguide loads, and overcoat Ku wave band coaxial configuration connects corrugated horn.This structure can make Ku Fen Li with the work structuring of Ka ripple, independent operating.Its shortcoming is that Ka wave band can only move single-frequency and only have a kind of polarised direction, and feed and comparatively complexity of polarization isolation system." Prototype Design of a Dual-band Dual-polarization Ku/Ka-band Feed " (Proceedings of the European Microwave Association that the people such as the Hendrik Albertus Thiart of Canada University of Victoria deliver; December 2006; Vol.2; 318-325) the shared antenna feed of a kind of dual-band and dual-polarization Ku/Ka ripple has been described, it realizes feed and the polarization separation of Ku ripple with probe structure, feed structure is simple, but its Ka ripple still can only work in single-frequency and single polarised direction, and Ku and Ka ripple can not structurally be realized isolation completely, easily interfere with each other.
Along with the development of application technology and the exploitation of high frequency channel, in engineering, be badly in need of a kind ofly can realizing Ku/Ka two-band, dual polarization direction, transceiving integrated high performance antenna feed.
People such as Yang Shiwen, in the Chinese patent No.102136634A submitting on January 12nd, 2011, disclose the integrated transmitting-receiving feed antenna of a kind of Ku/Ka frequency range circular polarization, but it still has following shortcoming: 1. overall dimensions is bigger than normal; 2. use SMA probe feed, increased loss; 3. the data such as standing-wave ratio, axial ratio all do not reach domestic and international advanced level.
Summary of the invention
In order to solve above-mentioned shortcoming of the prior art and problem, the present invention is proposed.
The present invention shares in order to realize Ku/Ka waveband double-frequency in engineering, and each frequency range all has the high performance antenna feed of dual polarization direction and transceiver.This feed has good Ku/Ka ripple frequency range isolation, good polarization separation and polarization isolation in frequency range, good radiation characteristic and standing-wave ratio.
According to an aspect, a kind of Ku/Ka two waveband transmit-receive sharing feed is provided, comprise: Ku wave band receive-transmit system, described Ku wave band receive-transmit system comprises successively connected Ku spoke side, staged chokes ring, coaxial linkage section, the coaxial orthomode coupler of Ku wave band and Ku wave band receiving terminal filter; And being nested in the Ka wave band receive-transmit system in coaxial with described Ku wave band receive-transmit system, described Ka wave band receive-transmit system comprises successively connected dielectric rod structure, medium circular polarizer, Ka wave band orthomode coupler and Ka wave band receiving terminal filter.
According to an aspect of the present invention, the coaxial orthomode coupler of described Ku wave band comprises: coaxial configuration inner waveguide, the coaxial orthomode coupler outer wall of Ku ripple and the symmetrical rectangular transform structure at two corresponding ports of frequency range of Ku wave band.
According to an aspect of the present invention, described symmetrical rectangular transform structure comprises: Ku transmitting terminal rectangular transform, Ku transmitting terminal rectangular transform short circuit coupling and Ku transmitting terminal rectangular transform short circuit coupling; And Ku receiving terminal rectangular transform, Ku receiving terminal rectangular transform short circuit coupling and Ku receiving terminal rectangular transform short circuit coupling.
According to an aspect of the present invention, the coaxial orthomode coupler of described Ku wave band comprises the 90 ° of inclined-plane elbows of Ku transmitting terminal after described Ku transmitting terminal rectangular transform and described Ku receiving terminal rectangular transform and 90 ° of inclined-plane elbows of Ku receiving terminal respectively.
According to an aspect of the present invention, described Ku spoke side adopts corrugated horn.
According to an aspect of the present invention, based on standing-wave ratio, directional diagram and cross-polarized requirement, adjust quantity, groove depth, groove width and the spacing distance of the groove of described corrugated horn.
According to an aspect of the present invention, described staged chokes ring can effectively be isolated frequency electromagnetic waves and can well adjust standing-wave ratio.
According to an aspect of the present invention, described dielectric rod structure is comprised of the dielectric antenna joining successively, Filled Dielectrics section and medium matching section.
According to an aspect of the present invention, according to following standard, select the diameter of dielectric rod structure:
Figure BDA0000143359820000031
wherein, d represents the diameter of dielectric rod, and λ represents the wavelength of electromagnetic wave in medium, ε rrepresent the dielectric constant of medium.
According to an aspect of the present invention, described Ku/Ka two waveband transmit-receive sharing feed is further included in the conical horn of coaxial configuration inner waveguide end.
Accompanying drawing explanation
By the description of carrying out below in conjunction with accompanying drawing, the above and other aspects, features and advantages of some example embodiment of the present invention will become apparent to those skilled in the art, wherein:
Fig. 1 is according to the contour structures schematic diagram of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 2 and Fig. 3 are according to positive view and the sectional elevation of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 4 is the structure enlarged drawing of conical horn;
Fig. 5 is according to the principle perspective view of Ka transmitting-receiving structure, coaxial configuration inner waveguide and the assembly thereof of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 6 is the emulation standing-wave ratio that receives frequency range according to the Ku of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 7 is according to the emulation standing-wave ratio of the Ku transmit frequency band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 8 is the emulation standing-wave ratio that receives frequency range according to the Ka of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Fig. 9 is according to the emulation standing-wave ratio of the Ka transmit frequency band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 10 receives frequency range center frequency point E face and H face directional diagram according to the Ku of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 11 is according to the Ku transmit frequency band center frequency point E face of Ku/Ka two waveband transmit-receive sharing feed of the present invention and H face directional diagram;
Figure 12 receives frequency range center frequency point E face and H face directional diagram according to the Ka of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 13 is according to the Ka transmit frequency band center frequency point E face of Ku/Ka two waveband transmit-receive sharing feed of the present invention and H face directional diagram;
Figure 14 is the Cross polarization pattern that receives frequency range center frequency point according to the Ku of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 15 is according to the Cross polarization pattern of the Ku transmit frequency band center frequency point of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 16 is according to the isolation of the Ku wave band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 17 is according to the isolation of the Ka wave band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 18 is the test standing-wave ratio that receives frequency range according to the Ku of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 19 is according to the test standing-wave ratio of the Ku transmit frequency band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 20 is the test standing-wave ratio that receives frequency range according to the Ka of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 21 is according to the test standing-wave ratio of the Ka transmit frequency band of Ku/Ka two waveband transmit-receive sharing feed of the present invention;
Figure 22 is the Ku wave band axial ratio test result according to Ku/Ka two waveband transmit-receive sharing feed of the present invention; And
Figure 23 is the Ka wave band axial ratio test result according to Ku/Ka two waveband transmit-receive sharing feed of the present invention.
Embodiment
Provide and the following describes to help complete understanding example embodiment of the present invention with reference to accompanying drawing.It comprises that various details are to help understanding, and they should be thought to be only exemplary.Therefore, those of ordinary skills will be appreciated that, can make various changes and modification to the embodiments described herein, and can not deviate from scope and spirit of the present invention.Equally, for clarity and conciseness, omitted the description to known function and structure.
Describe below with reference to the accompanying drawings the present invention in detail.
Fig. 1 is according to the contour structures schematic diagram of Ku/Ka two waveband transmit-receive sharing feed of the present invention.The transmission-receiving function syntype of having realized four different polarization of frequency range in Ku/Ka wave band due to the present invention is integrated, so and can find out that from this contour structures schematic diagram the present invention is structurally compacter.
Fig. 2 and Fig. 3 are according to positive view and the sectional elevation of Ku/Ka two waveband transmit-receive sharing feed of the present invention.
As shown in Figures 2 and 3, Ku/Ka two waveband transmit-receive sharing feed according to the present invention comprises Ku wave band receive-transmit system and is nested in the Ka wave band receive-transmit system in coaxial with Ku wave band receive-transmit system.
Described Ku wave band receive-transmit system comprises successively connected Ku spoke side, staged chokes ring 102, coaxial linkage section 103, the coaxial orthomode coupler 100 of Ku wave band and Ku wave band receiving terminal filter 113.
In the present invention, Ku spoke side adopts corrugated horn 101, and corrugated horn 101 is a kind of traveling-wave antennas, and it uses extensively in engineering, and designing technique is very ripe, but it is actually rare to be applied to coaxial configuration.The present invention has designed a corrugated horn specially for this reason, to satisfy the demand.Particularly, the present invention uses axially grooved corrugated horn 101, adjusts quantity, groove depth, groove width and the spacing distance of flared channels based on standing-wave ratio, directional diagram and cross-polarized requirement.
Staged chokes ring 102 plays the effect of band pass filter, and object is effectively isolate frequency electromagnetic waves and can well adjust standing-wave ratio, increases the isolation (being mainly to avoid Ka ripple to enter Ku ripple transmitting-receiving structure) of low-and high-frequency.Because two wave band intervals of Ku and Ka are very large, so can design staged chokes ring 102 with reference to respective filter theory.
Coaxial linkage section 103 is added between staged chokes ring 102 and Ku wave band orthomode coupler 100, for complete coaxial configuration.
First the coaxial orthomode coupler 100 of Ku wave band comprises coaxial configuration inner waveguide 117 and the coaxial orthomode coupler outer wall 121 of Ku ripple.
The coaxial orthomode coupler 100 of Ku wave band may further include the symmetrical rectangular transform structure at two corresponding ports of frequency range of Ku wave band, comprising: Ku transmitting terminal rectangular transform 106, Ku transmitting terminal rectangular transform short circuit coupling 107 and Ku transmitting terminal rectangular transform short circuit coupling 118; And Ku receiving terminal rectangular transform 110, Ku receiving terminal rectangular transform short circuit coupling 111 and Ku receiving terminal rectangular transform short circuit coupling 119.This is just avoided using power splitter or the mixer of 180 ° of electric bridges after feed.
Moreover, the present invention is in the unified single port structure of using of each frequency range, and this just does not need to connect power splitter or mixer again, is convenient to connect and greatly simplified total system.
In order to facilitate engineering to connect, at rear 90 ° of inclined-plane elbows 108 of Ku transmitting terminal and the 90 ° of inclined-plane elbows 112 of Ku receiving terminal of being connected respectively of Ku transmitting terminal rectangular transform 106 and Ku receiving terminal rectangular transform 110.Before Ku receiving terminal 114, design Ku wave band receiving terminal filter 113, be used for realizing transmitting-receiving isolation.
The coaxial orthomode coupler 100 of described Ku wave band further can comprise coupling ring group 104 and coupling round platform 116, for adjusting the standing-wave ratio of Ku ripple transmitting-receiving structural entity.In addition, coupling ring group 104 also has certain filter action.In order to coordinate engineering manufacture, coupling ring group 104 and coupling round platform 116 can be integrated on coaxial configuration inner waveguide 117.
The coaxial orthomode coupler 100 of described Ku wave band further can comprise grid formula perpendicular polarization reflector 105, be used for reflecting perpendicular polarization, it need not connect coaxial inside and outside wall, and work in-process not be used in and on outer wall, drives location notch, and saved installation steps, reduced installation positioning difficulty.Than traditional plane sheet reflector, it has better return loss in coaxial system.The coaxial orthomode coupler 100 of described Ku wave band further can comprise horizontal polarization reflector 115, they are different from horizontal polarization reflector in the past, it to the reflection of signal more initiatively and has increased coupling round platform 116, is more conducive to the reflection of signal and the adjustment of standing-wave ratio.
In order to coordinate engineering manufacture, the present invention is integrated into grid formula perpendicular polarization reflector 105, horizontal polarization reflector 115 on coaxial configuration inner waveguide 117.Ku wave band orthomode coupler adopts orthogonal polarized wave to encourage, thereby has effectively contained the generation of TEM mould, farthest encourages TE 11mould.Receive signal and transmit and use orthohormbic structure work, can effectively carry out polarization isolation.
It should be noted, do not describe in the above the coaxial orthomode coupler 100 of Ku wave band some parts relative position or how to locate, but those skilled in the art can adjust each parts accordingly by being expressly understood in the situation that guaranteeing standing-wave ratio minimum and polarization isolation maximum.
Described Ka wave band receive-transmit system comprises successively connected dielectric rod structure, medium circular polarizer and Ka wave band orthomode coupler.
Described dielectric rod structure is comprised of the dielectric antenna 201 joining successively, Filled Dielectrics section 203 and medium matching section 204.The effect of dielectric rod structure is by the main transmission mode TE of circular waveguide 11convert HE to 11mix mould, and receive and transmitting work.For fear of producing HE 11outside higher mode, can adopt following standard to select the diameter of dielectric rod structure (being the diameter of Filled Dielectrics section 203):
d / &lambda; < 0.626 / &epsiv; r
Wherein, λ represents the wavelength of electromagnetic wave in medium, ε rrepresent the dielectric constant of medium.
Ka spoke side comprises dielectric antenna 201, and it is a kind of surface wave antenna.Ku spoke side and Ka spoke side are controlled respectively respectively the radiation characteristic of Ku and Ka wave band with traveling-wave antenna and surface wave antenna, make can influence each other hardly between these two wave bands, and be conducive to design good radiation characteristic.In order to adapt to requirement of engineering, the present invention transforms traditional dielectric antenna 201, and its special feature is: for enhanced rad characteristic, at coaxial configuration inner waveguide 117 ends, added conical horn 202.That is to say, Ka spoke side of the present invention is comprised of dielectric antenna 201 and conical horn 202.Corresponding size be can adjust, standing-wave ratio and directional diagram optimized.
Because the wavelength of electromagnetic wave in medium is less than its aerial wavelength, therefore the present invention extends to Filled Dielectrics section 203 all coaxial inner waveguide 117 when design, do like this and can make the overall dimensions of invention reduce, thereby make corrugated horn 101 miniaturizations, reduce blocking antenna-reflected system.Meanwhile, designed circular cone transition 205, to connect air circular waveguide corresponding construction.
Filled Dielectrics section 203 is not only full of whole coaxial configuration inner waveguide 117, has one section of extension thereafter, the needs that connect to meet engineering.The present invention is positioned over medium matching section 204 in one section of cone transitional section 205, is thus connected Filled Dielectrics Circular waveguides and air Circular waveguides.
In order to realize the feature of Ka ripple circular polarization, the present invention has adopted medium circular polarizer, comprises dieelctric sheet 206 and dieelctric sheet guide rail 207, and its major part is dieelctric sheet 206.Medium circular polarizer can be by the main mould TE in circular waveguide 11mould is decomposed into the main mould signal of 90 ° of two orthogonal, constant amplitudes, phase phasic difference, with this, realizes the circular polarization of signal.The key that realizes its effect is the polarised direction angle at 45 ° in the axial direction that guarantees dieelctric sheet 206 and signal.And the total length of dieelctric sheet 206 affects phase difference value.The design of dielectric phase shifter has directly affected the axial ratio of Ka circularly polarised wave.
Described Ka wave band orthomode coupler can comprise horizontal polarization reflecting plate 208, Ka receiving terminal rectangular transform 209,90 ° of inclined-plane elbows 210 of Ka receiving terminal, Ka wave band receiving terminal filter 211, Ka receiving terminal interface 212, Ka transmitting terminal rectangular transform 213, Ka transmitting terminal interface 214 as shown in the figure.With Ku band classes seemingly, at receiving terminal, also used 90 ° of inclined-plane elbows 210 of Ka receiving terminal and Ka wave band receiving terminal filter 211.Due to Ka wave band orthomode coupler of the present invention and traditional orthomode coupler structural similarity, so be no longer described in detail at this.
Fig. 4 shows conical horn 202 with the form of enlarged drawing.
Fig. 5 shows Ka transmitting-receiving structure, coaxial configuration inner waveguide and the assembly thereof according to Ku/Ka two waveband transmit-receive sharing feed of the present invention with the form of Perspective Principles figure.
Fig. 6 to Figure 23 shows according to the simulation result of Ku/Ka two waveband transmit-receive sharing feed of the present invention.
The present invention is to be embodied as design principle in engineering, and uses Engineering Simulating Software HFSS to carry out design and simulation.
First, determine the diameter of dielectric rod.As described above, adopt following standard to select the diameter of dielectric rod structure:
d / &lambda; < 0.626 / &epsiv; r
Wherein, d is the diameter of dielectric rod structure, and λ represents the wavelength of electromagnetic wave in medium, ε rrepresent the dielectric constant of medium.Only have after the diameter of having determined dielectric rod, just can carry out further work.Next, determine the outside dimension of coaxial configuration inner waveguide 117, because there is endways the radiation supplementary structure of Ka ripple---conical horn 202, for example, so should meet the designing requirement of conical horn 202 (co-ordination medium antenna, have good standing-wave ratio and directional diagram) under, minimum external diameter selected.Then according to the coaxial theoretical internal diameter of selecting coaxial configuration outer wall, the i.e. internal diameter of coaxial linkage section outer wall 120 and the coaxial orthomode coupler outer wall 121 of Ku ripple.
Then design Ka spoke side, it is comprised of dielectric antenna 201 and conical horn 202.For example, can adjust for the standing-wave ratio of Ka frequency range and directional diagram the size of dielectric antenna 201 and conical horn 202.For example, the fluting direction of corrugated horn 101, fluting quantity and subtended angle angle are looked concrete engineering demand decision; Groove depth should be more than or equal to λ/4; The ratio of separation and groove width is 1: 2 left and right.For example, for example, the diameter d ≈ λ of dielectric antenna 201 min/ (3~4), length l ≈ 0.5 λ min.
Complete after above step the coaxial orthomode coupler structure 100 of design Ku wave band.Due to the formation of the coaxial orthomode coupler structure 100 of Ku wave band of the present invention being described in detail in detail in the above, so no longer repeat at this.
Complete after the Preliminary design of Ku wave band transmitting-receiving structure, the length of coaxial configuration is just roughly shaped.Then carry out the design of Ka wave band transmitting-receiving structure.
Completing after the independent design of each several part, carry out associative simulation.Its main purpose is to make each port have good standing-wave ratio simultaneously.First public part is adjusted, then adjusted the exclusive part of each port, reached re-set target.Public partial adjustment mainly refers to that the length of coaxial linkage section 103 adjusts within the scope of requirement of engineering.
Dielectric phase shifter medium sheet requires relative dielectric constant ε rwant large, and loss tangent tan δ is little, thickness is generally t=λ/10, and hypotenuse is long total length
Figure BDA0000143359820000112
Wherein λ in g---the guide wavelength of medium when waveguide is middle
λ g limit---the guide wavelength of medium on waveguide limit time
The phase-shift phase of φ---requirement.
The adjustment of other parts is all the fine setting of carrying out in order to meet the data such as standing-wave ratio, polarization isolation, axial ratio.
As shown in Fig. 6-23, the simulation result that the present invention completes whole designs is:
1.Ku ripple receiving terminal standing wave is less than 1.4, be less than-30dB of cross polarization, and transmitting terminal standing wave is less than 1.3, be less than-23dB of cross polarization, be less than-110dB of receive-transmit isolation.
2.Ka ripple receiving terminal standing wave is less than 1.8, and transmitting terminal standing wave is less than 1.7, and axial ratio is less than 1.8, be less than-82dB of receive-transmit isolation.
Although this specification comprises many specific implementations details, but these details should be interpreted as to the restriction of the scope of the content that maybe can advocate any invention, and should be interpreted as can be specific to the description of the feature of the specific embodiment of specific invention.Some Feature Combination of describing in the situation of the embodiment separating in this manual can also be realized in single embodiment.On the contrary, also can by each character separation of describing in the situation of single execution mode in multiple execution modes realize or in any suitable sub-portfolio, realize.In addition, although may describe feature as in the above in some combination, work, even initial opinion so, but can in some cases one or more features of the combination from advocated be left out from combination, and advocated combination can be pointed to the variant of sub-portfolio or sub-portfolio.
Above-mentioned embodiment, does not form limiting the scope of the invention.Those skilled in the art should be understood that, depend on designing requirement and other factors, various modifications, combination, sub-portfolio can occur and substitute.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection range of the present invention.

Claims (9)

1. a Ku/Ka two waveband transmit-receive sharing feed, comprising:
Ku wave band receive-transmit system, described Ku wave band receive-transmit system comprises successively connected Ku spoke side, staged chokes ring, coaxial linkage section, the coaxial orthomode coupler of Ku wave band and Ku wave band receiving terminal filter; And
Be nested in the Ka wave band receive-transmit system in coaxial with described Ku wave band receive-transmit system, described Ka wave band receive-transmit system comprises successively connected dielectric rod structure, medium circular polarizer, Ka wave band orthomode coupler and Ka wave band receiving terminal filter,
Wherein, the coaxial orthomode coupler of described Ku wave band comprises: coaxial configuration inner waveguide, the coaxial orthomode coupler outer wall of Ku ripple and the symmetrical rectangular transform structure at two corresponding ports of frequency range of Ku wave band.
2. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, described symmetrical rectangular transform structure comprises:
Ku transmitting terminal rectangular transform, Ku transmitting terminal rectangular transform short circuit coupling and Ku transmitting terminal rectangular transform short circuit coupling; And
Ku receiving terminal rectangular transform, Ku receiving terminal rectangular transform short circuit coupling and Ku receiving terminal rectangular transform short circuit coupling.
3. Ku/Ka two waveband transmit-receive sharing feed according to claim 2, wherein, the coaxial orthomode coupler of described Ku wave band comprises the 90 ° of inclined-plane elbows of Ku transmitting terminal after described Ku transmitting terminal rectangular transform and described Ku receiving terminal rectangular transform and 90 ° of inclined-plane elbows of Ku receiving terminal respectively.
4. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, described Ku spoke side adopts corrugated horn.
5. Ku/Ka two waveband transmit-receive sharing feed according to claim 4, wherein, adjusts quantity, groove depth, groove width and the spacing distance of the groove of described corrugated horn based on standing-wave ratio, directional diagram and cross-polarized requirement.
6. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, described staged chokes ring can be isolated frequency electromagnetic waves effectively.
7. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, described dielectric rod structure is comprised of the dielectric antenna joining successively, Filled Dielectrics section and medium matching section.
8. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, according to following standard, select the diameter of dielectric rod structure:
d / &lambda; < 0.626 / &epsiv; r
Wherein, d represents the diameter of dielectric rod, and λ represents the wavelength of electromagnetic wave in medium, ε rrepresent the dielectric constant of medium.
9. Ku/Ka two waveband transmit-receive sharing feed according to claim 1, wherein, described Ku/Ka two waveband transmit-receive sharing feed is further included in the conical horn of coaxial configuration inner waveguide end.
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CN117293520B (en) * 2023-09-14 2024-03-22 北京西宝电子技术有限责任公司 Dielectric-filled horn antenna and communication system

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