CN207320331U - Dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna - Google Patents

Dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna Download PDF

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Publication number
CN207320331U
CN207320331U CN201721251857.6U CN201721251857U CN207320331U CN 207320331 U CN207320331 U CN 207320331U CN 201721251857 U CN201721251857 U CN 201721251857U CN 207320331 U CN207320331 U CN 207320331U
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waveguide
planar array
antenna
array antenna
trumpet
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杨州元
卢曙
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Beijing Star Axis Technology Co Ltd
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Beijing Star Axis Technology Co Ltd
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Abstract

The utility model provides a kind of dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna, it includes:The arrangement mode of rectangular waveguide loudspeaker, waveguide orthomode coupler, the antenna element and mutiple antennas unit that are composed of rectangular waveguide loudspeaker and waveguide orthomode coupler in the plane.The shape of the bell mouth diameter of each rectangular waveguide electromagnetic horn is square, its structure is the square pyramid loudspeaker of three layers of ladder transition;The waveguide orthomode coupler becomes the orthomode coupler of branched structure for longitudinal direction cone, the public port of the waveguide orthomode coupler is connected with the waveguide port of the rectangular waveguide loudspeaker, the waveguide horns of one support dual-band and dual-polarization Shared aperture of composition, i.e. an antenna element;This antenna element is arranged in the plane, forms planar array antenna.Planar array antenna made of the utility model Pass through above-mentioned technical proposal has the characteristics that bifrequency, dual polarization and Shared aperture.

Description

Dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna
Technical field
The utility model belongs to satellite communication antena field, more particularly to a kind of dual-band and dual-polarization Shared aperture waveguide trumpet is put down Planar array antenna, uses particular in the communication of satellite emergency mobile.
Background technology
Planar array satellite antenna has begun to production on a small quantity and uses in the world, and is forming a kind of new hair Exhibition trend, represents the new direction of current international satellite communication application.Existing planar array satellite antenna is mostly using shaking Sub- micro-strip plane array technology and Waveguide slot plane array technology.
Oscillator Microstrip Planar Array Antenna is by the half-wave dipole of aligned orderly on tablet by electromagenetic wave radiation in the air.Penetrate Frequency couple feed network uses the microstrip-circuit technology in microwave technology.
The micro-strip used in oscillator Microstrip Planar Array Antenna is printed on circuit boards, using double micro-strip orthogonal feed Mode, forms dual-frequency point resonance, it is possible to achieve dual-band and dual-polarization Shared aperture plate aerial on square-shaped radiation patch.It is but micro- Feed efficiency with vibrator type antenna is low, easy excitation table surface wave, aerial band width, and load power is low.By domestic technique condition With the limitation of manufacturing process, common product can not realize transmitting-receiving Shared aperture, or two pieces of antenna plates using transmitting-receiving phase separation.
Waveguide slot planar array antenna is by multiple gaps of aligned orderly on wave guide wall by electromagenetic wave radiation in the air. Waveguide slot planar array antenna uses waveguide feed, advantageously reduces feeder loss, improves antenna efficiency and load power.But As soon as it is that gap in same root waveguide can only support a polarization direction, to realize that dual polarization must be mutually orthogonal polarized seam Gap waveguide is alternately arranged planar, can not really form double frequency, dual polarization, Shared aperture by the antenna element in aerial array Planar array antenna.And such gap waveguide arrangement has widened the interval of radiation source, it is easier to graing lobe occur, influence antenna Performance.
The content of the invention
In order at least solve to be not easy to realize dual-band and dual-polarization Shared aperture existing for planar array satellite antenna in the prior art The problem of, the utility model embodiment provides a kind of dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna, it is by more A antenna element is arranged and formed in the form of an array in the plane;Each antenna element by rectangular waveguide loudspeaker and waveguide just Mode coupler is handed over to be composed.
In waveguide trumpet planar array antenna as described above, it is preferable that the rectangular waveguide loudspeaker are three layers of ladder The square pyramid loudspeaker of transition, the shape of its bell mouth diameter is square.
Cross grizzly bar is with the addition of on the bore of each rectangular waveguide loudspeaker.
In waveguide trumpet planar array antenna as described above, it is preferable that the waveguide orthomode coupler is longitudinal direction Cone becomes the orthomode coupler of branched structure.
In waveguide trumpet planar array antenna as described above, it is preferable that the waveguide orthomode coupler it is public The size of port is identical with the waveguide port size of the rectangular waveguide loudspeaker.
In waveguide trumpet planar array antenna as described above, it is preferable that the antenna element of the planar array antenna Arrangement mode arranges for plane square.
In waveguide trumpet planar array antenna as described above, it is preferable that the rectangular waveguide loudspeaker and the waveguide Orthomode coupler employs thin-wall construction, and respective wall thickness is 1.5-2.5mm.
In waveguide trumpet planar array antenna as described above, it is preferable that the antenna opening of the planar array antenna Face electric field weighting function is Taylor's distribution function.
In waveguide trumpet planar array antenna as described above, it is preferable that the rectangular waveguide loudspeaker, the cross grid Bar and the waveguide orthomode coupler are made of metal material.
In waveguide trumpet planar array antenna as described above, it is preferable that the waveguide trumpet planar array antenna Exterior contour size length is respectively 500mm, 500mm, 51.2mm.
In conclusion having the beneficial effect that of bringing of the utility model:
In the communication of satellite emergency mobile, the integral antenna structure of the utility model product, does not make antenna in the application not Need to carry out on-site consolidation and decomposition as paraboloidal-reflector antenna again, provided just quickly to open satellite emergency communication Profit.
Bifrequency, dual polarization, Shared aperture are realized on planar array antenna, it is only necessary to which common antenna is with regard to that can meet satellite The technical requirements for the full duplex that communicates.
, can be with to the inhibition of secondary lobe by being weighted processing to Antenna aperture illumination function with Taylor's distribution function Reach -22dB, the requirement (14dB) far below CCIR, also significantly lower than traditional reflective surface antenna the first secondary lobe index (14~ 17dB).Low side-lobe antenna is conducive to improve the signal-to-noise ratio for receiving signal, while reduces interference of the emitting radio waves to adjacent star.
Method by increasing cross grizzly bar on waveguide trumpet mouth, improves the spatial distribution of Antenna aperture Net long wave radiation member Frequency, so as to widen the angle of diffraction of graing lobe, makes graing lobe obtain suppressing well.
The antenna element of waveguide trumpet planar array antenna, combined by rectangular waveguide loudspeaker and waveguide orthomode coupler and Into the reception and transmitting feeding network, whole antenna for being equipped with waveguide transmission line composition are all made of waveguide device.Waveguide device Transmission Insertion Loss is small, load power is big, improves the overall efficiency of antenna.
The raising of antenna efficiency, is conducive under peer antenna bore, obtains the antenna gain of higher, realizes the biography of higher Defeated digit rate.The antenna aperture area of the utility model is 500mm × 500mm, and antenna efficiency can reach more than 85%, and antenna increases Benefit can be equivalent to the Regular parabolic reflector antenna that bore is 0.7m (antenna effective area of the latter is the former 1.5 times).
The cone of rectangular waveguide loudspeaker and waveguide orthomode coupler becomes waveguide segment by the way of ladder transition.Ladder mistake The transition section length that crosses mode is short, compact-sized, thin-wall construction, advantageously reduces the overall dimensions and weight of antenna.
The characteristics of low sidelobe and big load power, contribute to antenna to be matched with high power amplifier, meet that satellite leads to Believe that high speed business transmission needs.
Brief description of the drawings
Fig. 1 is a kind of dimensional structure diagram for rectangular waveguide loudspeaker that the utility model embodiment provides;
Fig. 2 is a kind of dimensional structure diagram for orthomode coupler that the utility model embodiment provides;
Fig. 3 is a kind of waveguide external dimensional structure diagram (loudspeaker for antenna element that the utility model embodiment provides Mouth is not with metal cross grizzly bar);
Fig. 4 is dimensional structure diagram (loudspeaker inside a kind of waveguide for antenna element that figure utility model embodiment provides Mouth is not with metal cross grizzly bar);
Fig. 5 is the solid for another antenna element (horn mouth is with metal cross grizzly bar) that the utility model embodiment provides Structure diagram;
Fig. 6 is a kind of dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna that the utility model embodiment provides Planar structure front schematic view;
Fig. 7 is a kind of dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna that the utility model embodiment provides Planar structure prism schematic diagram;
Wherein, symbol description is as follows in figure:
1 antenna element, 3 dual-band and dual-polarization Shared aperture waveguide trumpet planar array antennas, 11 rectangular waveguide loudspeaker, 12 waveguides Orthomode coupler, 120 public ports, 121 straight-through ports, 122 coupling branch ports, 201 metal cross grizzly bars.
Embodiment
The utility model is described in further details with reference to the accompanying drawings and detailed description.
Referring to Fig. 1~Fig. 7, the utility model embodiment provides a kind of dual-band and dual-polarization Shared aperture waveguide trumpet planar array Array antenna, it is arranged by mutiple antennas unit 1 and is formed in the form of an array in the plane.Each antenna element 1 includes:Rectangular wave Loudspeaker 11 and waveguide orthomode coupler 12 are led, are combined by rectangular waveguide loudspeaker 11 and waveguide orthomode coupler 12, Form antenna element 1.
The bore shape of rectangular waveguide loudspeaker 11 is square, i.e. four length of sides of loudspeaker are equal.Can be with square horn Two orthogonal linearly polarized waves are encouraged, the requirement of dual-band and dual-polarization is met with this.
In the communication of Ku band satellites, transmitting-receiving frequency range is separated by 2GHz, improves impedance matching for frequency band spreading, makes the waveguide loudspeaker Receive and launch frequency range in all there is good impedance matching, the opening of rectangular waveguide loudspeaker 11 does not use gradual transition Mode, but employ the mode of ladder transition.Rectangular waveguide loudspeaker 11 in the utility model array antenna are one three The square pyramid loudspeaker of layer ladder transition.
Rectangular waveguide loudspeaker 11 are the fundamental radiation bodies of this planar array antenna.
Waveguide orthomode coupler 12 is used for separating two orthogonally polarized waves in rectangular waveguide loudspeaker 11, it is that satellite leads to It is used for separating the important microwave device for transmitting/receiving signal (i.e. the collection of letters number and signalling) in letter antenna.The ripple that the utility model uses Lead orthomode coupler 12 be it is a kind of based on longitudinal direction bore become branched structure waveguide orthomode coupler, its public port 120 It is identical with the waveguide port of 11 end of rectangular waveguide loudspeaker (right end in Fig. 1) for rectangular waveguide port, size.In this way, waveguide is just Hand over mode coupler 12 directly to combine with rectangular waveguide loudspeaker 11 to connect, it is not necessary to add changeover portion again.
Ripple can be become by boring by entering the vertically polarized wave TE10 of waveguide orthomode coupler 12 from rectangular waveguide loudspeaker 11 Section is led, is exported by the straight-through port 121 of waveguide orthomode coupler 12.For orthogonal horizontal polarized wave TE01, cone becomes waveguide Section forms short circuit to it and is reflected, and it can not be passed through from straight-through port 121.It can only be via coupling branch window 122 It is coupled in branch-waveguide.Cone in the utility model becomes waveguide segment and employs the completion transition of three-level ladder.
Waveguide orthomode coupler 12 is the Basic Couplings body of this planar array antenna.
Antenna element 1 is arranged in a plane, just constitutes the radiating surface and coupling of waveguide trumpet planar array antenna Conjunction face.
For convenience of parallelly feeding, which is arranged in the form of square array, i.e. mutiple antennas list Identical permutation is into a square array.Below by taking the square array of 16 × 16 antenna element compositions as an example, alignment processes are carried out Explanation.
2 × 2 yuan of antenna basic array is first formed with 4 antenna elements, then with 42 × 2 yuan of antenna basic array group Into one 4 × 4 yuan of aerial array, one 8 × 8 yuan of aerial array is then formed with 44 × 4 yuan of aerial array, most Afterwards, 16 × 16 yuan of planar array antennas 3 are formed with 48 × 8 yuan of aerial arrays, as shown in fig. 6-7.In other examples, Other composition battle array modes can also be used, the present embodiment is to this without limiting.
By adjusting Antenna aperture illumination function (antenna surface electric field distribution function), the side of antenna can be suppressed well Valve.The utility model product is weighted processing using Taylor's distribution function, omits the mouth face illumination amplitude of antenna surface central area Higher than the illumination amplitude of fringe region, antenna sidelobe is set to have obtained good suppression.
One inherent defect of planar array antenna is to produce graing lobe.For by graing lobe away from antenna main beam, rectangular waveguide Loudspeaker need to rely closely in arrangement group battle array, that is, reduce the interval between radiating element (i.e. rectangular waveguide loudspeaker) to the greatest extent.Cause This, the utility model product employs thin-wall construction when rectangular waveguide loudspeaker are when microwave components design, with to greatest extent The center spacing between rectangular waveguide loudspeaker is reduced, while also mitigates the weight of antenna.Antenna element 1 in arrangement group battle array, To make each antenna element rely closely, the interval between each antenna element is reduced, rectangular waveguide loudspeaker and other microwave devices are equal Employ thin-wall construction design, wall thickness 1.5-2.5mm.
Further to improve the graing lobe index of antenna, one layer of grid face is covered again on Antenna aperture, by improving antenna The spatial distribution frequency of mouth face Net long wave radiation member, makes the graing lobe composition that electromagnetic wave diffraction is formed after interfering further away from main ripple Beam, so as to play effective inhibitory action to graing lobe.
The covering of grid face on Antenna aperture is real by adding metal cross grizzly bar 201 in each bell mouth surface Existing, i.e. cross grizzly bar is made of metal material, as shown in Figure 5.So waveguide trumpet planar array antenna of the utility model Used antenna element 1 carries cross grizzly bar, grill width 1.5mm.
Rectangular waveguide loudspeaker 11 and waveguide orthomode coupler 12 are made of metal material, the antenna element shown in Fig. 4 For the antenna element not with cross grizzly bar, first antenna unit can be referred to as at this time, the antenna element shown in Fig. 5 be with The antenna element of cross grizzly bar, can be referred to as the second antenna element at this time.The exterior contour of waveguide trumpet planar array antenna Size is 500 × 500 × 51.2mm, and foregoing three size values correspond to the size of length respectively.
In conclusion having the beneficial effect that of bringing of the utility model:
Using waveguide trumpet planar array antenna made of antenna element 1, bifrequency, dual polarization, Shared aperture are realized Feature, can realize full duplex satellite communication on same secondary planar array antenna, overcome micro-strip oscillator planar array antenna With the inherent defect and deficiency of Waveguide slot planar array antenna.
Weighting processing is distributed by carrying out Taylor to Antenna aperture illumination function, can to the Sidelobe Suppression of planar array antenna To reach -22dB, the requirement (14dB) far below CCIR, also significantly lower than the first secondary lobe index (14 of traditional reflective surface antenna ~17dB).Low side-lobe antenna is conducive to improve the signal-to-noise ratio for receiving signal, while reduces interference of the emitting radio waves to adjacent star.
Method by increasing cross grizzly bar on waveguide trumpet mouth, improves the spatial distribution of Antenna aperture Net long wave radiation member Frequency, so as to widen the angle of diffraction of graing lobe.Test result shows, in the range of main beam ± 60 °, graing lobe has obtained very well Ground suppresses.
The cone of square pyramid waveguide trumpet 11 and waveguide orthomode coupler 12 becomes the side that waveguide segment uses ladder transition Formula.The transition section length of ladder transition mode is short, compact-sized, advantageously reduces the overall dimensions and weight of antenna.
The radiating surface and coupling surface of waveguide trumpet planar array antenna are formed by waveguide microwave device, are equipped with waveguide transmission The reception of line composition and transmitting feeding network, whole antenna are all made of waveguide device.
Waveguide device transmission Insertion Loss is small, load power is big, improves the overall efficiency of antenna, can match somebody with somebody with high power amplifier Set uses, and meets that satellite communication high speed business transmits needs.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature Scheme is applied to realize.Therefore, embodiment disclosed above, all things considered, is all merely illustrative, and is not only 's.It is all in the scope of the utility model or in the change being equal in the scope of the utility model by the utility model bag Contain.

Claims (10)

  1. A kind of 1. dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna, it is characterised in that the waveguide trumpet planar array Array antenna is arranged by mutiple antennas unit and formed in the form of an array in the plane;
    Each antenna element is composed of rectangular waveguide loudspeaker and waveguide orthomode coupler.
  2. 2. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the rectangular waveguide loudspeaker are three The square pyramid loudspeaker of layer ladder transition.
  3. 3. waveguide trumpet planar array antenna according to claim 1, it is characterised in that in each rectangular waveguide loudspeaker It with the addition of cross grizzly bar on bore.
  4. 4. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the waveguide orthomode coupler The orthomode coupler for becoming branched structure is bored for longitudinal direction.
  5. 5. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the waveguide orthomode coupler Public port size it is identical with the waveguide port size of the rectangular waveguide loudspeaker.
  6. 6. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the day of the planar array antenna Line unit arrangement mode arranges for plane square.
  7. 7. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the rectangular waveguide loudspeaker and institute State waveguide orthomode coupler and employ thin-wall construction, respective wall thickness is 1.5-2.5mm.
  8. 8. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the day of the planar array antenna Line mouth face electric field weighting function is Taylor's distribution function.
  9. 9. waveguide trumpet planar array antenna according to claim 3, it is characterised in that the rectangular waveguide loudspeaker, institute State cross grizzly bar and the waveguide orthomode coupler is made of metal material.
  10. 10. waveguide trumpet planar array antenna according to claim 1, it is characterised in that the waveguide trumpet planar array The exterior contour size length of array antenna is respectively 500mm, 500mm, 51.2mm.
CN201721251857.6U 2017-09-27 2017-09-27 Dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna Active CN207320331U (en)

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Application Number Priority Date Filing Date Title
CN201721251857.6U CN207320331U (en) 2017-09-27 2017-09-27 Dual-band and dual-polarization Shared aperture waveguide trumpet planar array antenna

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110429378A (en) * 2019-07-30 2019-11-08 中国电子科技集团公司第三十八研究所 A kind of double frequency Shared aperture Waveguide slot radiating guide, antenna array and design method
CN111224229A (en) * 2020-01-15 2020-06-02 浙江大学 Satellite array antenna based on mirror image subarray

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110429378A (en) * 2019-07-30 2019-11-08 中国电子科技集团公司第三十八研究所 A kind of double frequency Shared aperture Waveguide slot radiating guide, antenna array and design method
CN111224229A (en) * 2020-01-15 2020-06-02 浙江大学 Satellite array antenna based on mirror image subarray
CN111224229B (en) * 2020-01-15 2021-04-06 浙江大学 Satellite array antenna based on mirror image subarray

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