CN103474787B - Dual-polarization planar-array satellite-televisionreception reception antenna - Google Patents
Dual-polarization planar-array satellite-televisionreception reception antenna Download PDFInfo
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- CN103474787B CN103474787B CN201310325327.1A CN201310325327A CN103474787B CN 103474787 B CN103474787 B CN 103474787B CN 201310325327 A CN201310325327 A CN 201310325327A CN 103474787 B CN103474787 B CN 103474787B
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Abstract
The invention discloses a kind of dual-polarization planar-array satellite-televisionreception reception antenna, described polarization feeding network one is mutually vertical with the polarised direction of polarization feeding network two, polarization feeding network one and two lays respectively at, radiating element is combined into 2 × 2 cell array antennas in lower two planes, described polarization feeding network one and two is between radiating element, the decline of polarization feeding network one and two curves at the back side of 2 × 2 cell array antennas, make polarization feeding network one and two geometrical length equal by compensating, the delivery outlet of polarization feeding network one and two is all at the back side of 2 × 2 cell array antennas, two delivery outlets are corresponding with two input ports of described dual polarization tuner, and connect respectively by microstrip line.The present invention has good secondary lobe, cross polarization characteristics, and antenna efficiency is higher, and the geometrical length through the dual polarization comprise network of overcompensation is substantially suitable, and whole antenna obtains good Circular polarization ratio characteristic in bandwidth.
Description
Technical field
The present invention relates to the reception technique field of satellite television, particularly relate to a kind of dual-polarization planar-array satellite-televisionreception reception antenna.
Background technology
Satellite television, as one of three kinds of transmission meanss of TV, all obtains a wide range of applications in countries in the world.Because the reason of history, each area adopts operating frequency and polarization mode to be all not quite similar, and Europe and Europe affect larger area, such as Australia, Africa, the Middle East, Southeast Asia etc. all adopt dual-linear polarization, and the U.S., Russia, China's (live broadcasting satellite) adopts double-circle polarization.
Adopt dual polarization to be because the frequency spectrum of planning can be made full use of, transmit more, the program of better quality.When adopting linear polarization signal carrier, on the earth, the coupling polarization of different regions is relevant to the position of longitude and latitude and satellite.Therefore initial satellite earth antenna is dual-polarized mostly, reflector antenna, and the tuner of selection can be dual-polarized, and plate aerial is also dual-polarized, such as the SR1000 of Raysat company, adopts micro-strip antenna array to realize dual polarization.In most cases, the user of fixed reception adopts reflector antenna more, and the coupling of linear polarization can realize by rotating tuner.Vehicle mobile receiving many employings planar array antenna.The price of early stage mobile-satellite television receiving antenna is very high, and its reason is just that the cost of manufacture of dual polarized panel array antenna is too high.When mould of plastics is shaping, the production technology of surface metalation is after civilian goods field of antenna obtains extensive use, single circular polarization or single fixing slant-polarized antennas are all commercially sold, but because the complexity of dual polarization design makes this product delay to emerge.Adopt and do not match with antenna aperture, much bigger waveguide network carries out feed to the loudspeaker of larger caliber, greatly reduce the design difficulty of dual polarized antenna, but also bring secondary lobe higher, cross polarization is poor, the problem that antenna efficiency is lower, the antenna gain of the actual acquisition of antenna that a special volume is very large does not but match.Make this antenna can only be used for the stronger region of signal, and more much bigger than similar single-polarized antenna volume.Although the polarization coupling for the antenna of fixed reception can lean on artificial rotation to realize, the switching between dual polarization can not also rely on artificial rotation, brings great inconvenience like this to user.Therefore dual polarized antenna is only the key of watching the whole program of satellite television.In automotive field, a broadband, substantially meet the dual polarized antenna that district from all parts of the world satellite television watches demand, its size and single polarization are substantially suitable especially, and can simple extension, the product that series of products meet the demand in the strong and weak area of unlike signal really could meet the demand in market.When adopting, mould of plastics is shaping, the technique of surface metalation, when the cost of individual antenna is also low, could obtain the accreditation in market.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of dual-polarization planar-array satellite-televisionreception reception antenna.
The present invention is achieved by the following technical solutions:
A kind of dual-polarization planar-array satellite-televisionreception reception antenna, include dual polarized antenna and dual polarization tuner, described dual polarized antenna includes radiating element, the rectangular waveguide feed mouth that two crosss are arranged, polarization feeding network one and polarization feeding network two, described radiating element is rectangular radiation loudspeaker, described rectangular waveguide feed mouth is to radiating element dual polarization feed, described polarization feeding network one is mutually vertical with the polarised direction of polarization feeding network two, polarization feeding network one and two all synthesizes with E-T structure, polarization feeding network one and two lays respectively at, radiating element is combined into 2 × 2 cell array antennas in lower two planes, described polarization feeding network one and two is between radiating element, the decline of polarization feeding network one and two curves at the back side of 2 × 2 cell array antennas, make polarization feeding network one and two geometrical length equal by compensating, the delivery outlet of polarization feeding network one and two is all at the back side of 2 × 2 cell array antennas, two delivery outlets are corresponding with two input ports of described dual polarization tuner, and connect respectively by microstrip line.
Spacing between described polarization feeding network one and two is 2mm.
The length of side of described radiating element rectangular radiation loudspeaker is less than 1 λ.
Divide E-T textural association to become 16 × 4 cell array antennas and 16 × unit 8 array antenna by copying of 2 × 2 cell array antennas with broadband etc., the synthesis E-T between unit adopts level Four coupling, can ensure that antenna has wider bandwidth.Bandwidth covers 10.95GHz-12.75GHz, and what can meet satellite television all over the world watches requirement.
Cross feed structure one presents one, and the double-deck comprise network of Unit 2 × 2 all passes through to be arranged, meticulously between radiating element.The secondary lobe of the array antenna of this design, cross polarization and antenna efficiency can reach best.
The network of two polarization can, by compensating, make its geometrical length substantially suitable, and therefore when two polarization constant amplitude feeds, during phase 90 °, in above-mentioned whole frequency band, Circular polarization ratio is less than 1dB.
Because waveguide comprise network makes full use of the space between unit, make its physical dimension of planar array antenna and aerial radiation actinal surface suitable, therefore can by shoulder to shoulder or front and rear panel mode combine this planar array antenna.After control mould size and kind, by the multiple antenna plate of combination, high-gain satellite earth antenna can be obtained.
Under same shell situation, obtain LNB and the LNA of double-circle polarization or dual-linear polarization tracking by changing micro-band plate.Meet the multiple requesting of the combination of many plates and series antenna.
Advantage of the present invention is: present invention employs the rectangular horn being less than 1 λ, cross feed structure one presents one, therefore there is good secondary lobe, cross polarization characteristics, antenna efficiency is higher, geometrical length through the dual polarization comprise network of overcompensation is substantially suitable, and whole antenna obtains good Circular polarization ratio characteristic in bandwidth.
Accompanying drawing explanation
Fig. 1 is the structure chart of 2 × 2 dual polarized antenna units.
Fig. 2 is the E-T of level Four coupling.
Fig. 3 is the stationary wave characteristic of above-mentioned E-T.
Fig. 4 is the front elevation of 16 × 4 cell array antennas.
Fig. 5 is the reverse side figure of 16 × 4 cell array antennas.
Fig. 6 is the front elevation of 16 × unit 8 array antenna.
Fig. 7 is the stationary wave characteristic in 16 × unit 8 frequency band.
Fig. 8 is the Circular polarization ratio characteristic in 16 × unit 8 frequency band.
Fig. 9 is the gain characteristic in 16 × unit 8 frequency band.
Figure 10 is the directional diagram of 16 × unit 8 10.9GHz.
Figure 11 is the directional diagram of 16 × unit 8 11.2GHz.
Figure 12 is the directional diagram of 16 × unit 8 11.7GHz.
Figure 13 is the directional diagram of 16 × unit 8 12.2GHz.
Figure 14 is the directional diagram of 16 × unit 8 12.7GHz.
Embodiment
As shown in Figure 1, a kind of dual-polarization planar-array satellite-televisionreception reception antenna, include dual polarized antenna and dual polarization tuner, described dual polarized antenna includes radiating element, the rectangular waveguide feed mouth 2 that two crosss are arranged, polarization feeding network 1 and polarization feeding network 24, described radiating element is rectangular radiation loudspeaker 1, described rectangular waveguide feed mouth 2 gives radiating element dual polarization feed, described polarization feeding network 1 is mutually vertical with the polarised direction of polarization feeding network 24, polarization feeding network one 3 and 24 all synthesizes with E-T structure, polarization feeding network one 3 and 24 lays respectively at, radiating element is combined into 2 × 2 cell array antennas in lower two planes, described polarization feeding network one 3 and 24 is between radiating element, the decline of polarization feeding network one 3 and 24 curves at the back side of 2 × 2 cell array antennas, make polarization feeding network one and two geometrical length equal by compensating, the delivery outlet of polarization feeding network one 3 and 24 is all at the back side of 2 × 2 cell array antennas, two delivery outlets are corresponding with two input ports of described dual polarization tuner, and connect respectively by microstrip line.
Spacing between described polarization feeding network one 3 and 24 is 2mm.
The length of side of described radiating element rectangular radiation loudspeaker 1 is less than 1 λ.
Divide E-T textural association to become 16 × 4 cell array antennas and 16 × unit 8 array antenna by copying of 2 × 2 cell array antennas with broadband etc., the synthesis E-T between unit adopts level Four coupling, can ensure that antenna has wider bandwidth.Bandwidth covers 10.95GHz-12.75GHz, and what can meet satellite television all over the world watches requirement.
As shown in Figure 1.This is the tomograph of Unit 2 × 2, wherein 1 represents radiating horn, and 2 represent cross double square waveguide feed mouth, for giving the dual-polarized feed of loudspeaker.3 represent one of them polarization feeding network, polarised direction is parallel with x-axis, 4 represent another one polarize feeding network, polarised direction is parallel with y-axis.Two polarization separate from height, midfeather 2mm.Two polarization networks are all based on E-T two-in-one structure, can find out because integrated arrangement two polarization networks, whole space is compact, unit interval crosses young pathbreaker cannot obtain superperformance, but unit interval then can bring graing lobe and larger cross polarization more than 1 λ, reduce the efficiency of antenna.Consider that vehicle-mounted planar array antenna is restricted to vertical height, need reduce the height of mobile receiver aerial as far as possible, therefore spacing selects 23mm(horizontal direction) and 22mm(vertical direction), the bore of single loudspeaker radiation unit is 19mm × 17.4mm.The broadside of synthesis waveguide is of a size of 17.2mm.Two-layer waveguide network adds that loudspeaker radiation unit gross thickness is 47.4mm.
Can combine above-mentioned Unit 2 × 2 by various mode, what we had combined has 16 × 4 cell arrays, also has 16 × unit 8 array.These combination arrays are because both direction unit number is all several powers of 2, therefore only need the E-T structure of decile, and in order to expand bandwidth, adopt multiple stage rank coupling E-T structure to be necessary, in Fig. 2,5 represent 4 step E-T structures, can obtain good bandwidth characteristic.Total standing wave of the combination of multiple like this E-T is just in tolerance interval.Fig. 3 is the stationary wave characteristic of E-T in frequency band of 4 step couplings, is less than 1.1 at our the bandwidth standing internal wave of demand.Also can have other compound mode, such as 8 × 6, even 6 × 6 cellular arraies are also passable.Just need not decile E-T structure, equally can by multiple stage rank combination Bandwidth.
As shown in Fig. 4 ~ Fig. 6.16 × 4 and 16 × unit 8 aerial array can be obtained by point E-T such as adding broadband that copies of Unit 2 × 2.Wherein 6 is comprise networks of a kind of polarization, add that main transmission waveguide (17.2mm × 4.1mm) forms by 3 in Unit 2 × 2 and E-T structure 5, because vertical cell number is less, left and right two parts synthesis before also need one E-90 ° curved, afterwards this layer network also need one H-90 ° curved, make wave guide outlet towards the back side of antenna.When 7---another one polarity combination network is in the end also curved behind same direction by one H-90 °, and two waveguide mouths will in one plane, at a distance of comparatively near, is conveniently connected with dual polarization tuner.8 is exactly the delivery outlet of comprise network 6 of x polarization, and 9 is delivery outlets of the comprise network 7 of y polarization.
10 is comprise networks that 16 × unit 8 array y polarizes, and 12 is its delivery outlets; 11 is comprise networks that 16 × unit 8 array x polarizes, and 13 is its delivery outlets.Can find out when unit number is 16 × 8, network 11 is in the end all straight main transmission waveguide before one-level E-T, network 10 is then many one E-90 ° curved, therefore in order to the length of compensating network 11, make itself and network 10 substantially suitable in physical dimension, in the end compensate for one section of waveguide length.Two output port 12 with 13 caliber size and spacing all consistent with 9 and 8 of 16 × 4 cell arrays.The overall dimension of last 16 × unit 8 array is: 367mm × 174.4mm × 50.9mm.The increase of thickness aspect is because last H-90 of lower floor's network ° of curved needs one section of transition straight wave guide, therefore adds a small stair in the part connecting tuner.
Two delivery outlets are of a size of 17.2mm × 4.1mm, both at a distance of 27.32mm(centre symmetry line to centre symmetry line).Tuner has two input ports of same size, corresponding with antenna delivery outlet.Finally synthesized in tuner by microstrip coupled, polarization conversion and polarization tracking, tuner dual output, the layout of down-conversion can according to circumstances be determined.Tuner is of a size of 100mm × 55mm × 15mm.
Many plates Combination Design can be carried out in 16 × unit 8 array basis, shoulder to shoulder, front and rear panel mode can be adopted, also both can use, realize the combination of 4 plate aerials.First LNA(and tuner structure consistent size) amplify, transfer to the right and left (on a left side, on the right side in dual polarization one) with cable, then carry out combinatorial compound respectively.Front and rear panel mixer needs to consider to compensate the path length difference of front and rear panel, to consider especially when two plates carry out elevation angle machinery sweep time, the change of path length difference, only has actual compensation path length difference, the validity that guarantee synthesizes in whole bandwidth.The design of front and rear panel can reduce the height of mobile-satellite television antenna, is adopted the earliest by the SR1000 of Raysat.But header board may block rear plate, the excessive compound direction figure affecting again the high elevation angle of front and rear panel spacing, the compensation of path length difference too increases difficulty, and therefore the selection of the spacing of front and rear panel needs to consider.The front and rear panel level interval 348.8mm(30 degree elevation angle is unobstructed) time, during emulation 20 degree, the elevation angle, gain is about 36.48dB, and at this moment during 70 degree, the elevation angle, secondary lobe is higher.During spacing 320mm, 20 degree of elevation angle simulated gain 36dB, during spacing 300mm, 20 degree of elevation angle simulated gain 35.8dB, gain and the secondary lobe at two kinds of situations, 70 degree of elevations angle are all improved.As can be seen from the above analysis, (two shoulder to shoulder in four plate combinations, the two plate combination in front and back) higher gain can be realized when portable antenna height is no more than 20cm, be roughly equivalent to the gain of the offset-fed reflecting surface of diameter 60cm, the situation of 43-44dBW can be only had for satellite EIRP, receive satellite television.This watches that the good-looking program on relatively remote satellite brings possibility to some areas.
Fig. 7 ~ Figure 14 gives the standing wave of 16 × unit 8, Circular polarization ratio, the directional diagram of gain characteristic and five frequencies.
Claims (4)
1. a dual-polarization planar-array satellite-televisionreception reception antenna, it is characterized in that: include dual polarized antenna and dual polarization tuner, described dual polarized antenna includes radiating element, the rectangular waveguide feed mouth that two crosss are arranged, polarization feeding network one and polarization feeding network two, described radiating element is rectangular radiation loudspeaker, described rectangular waveguide feed mouth is to radiating element dual polarization feed, described polarization feeding network one is mutually vertical with the polarised direction of polarization feeding network two, polarization feeding network one and two all synthesizes with E-T structure, polarization feeding network one and two lays respectively at, radiating element is combined into 2 × 2 cell array antennas in lower two planes, described polarization feeding network one and two is between radiating element, the decline of polarization feeding network one and two curves at the back side of 2 × 2 cell array antennas, make polarization feeding network one and two geometrical length equal by compensating, the delivery outlet of polarization feeding network one and two is all at the back side of 2 × 2 cell array antennas, two delivery outlets are corresponding with two input ports of described dual polarization tuner, and connect respectively by microstrip line.
2. dual-polarization planar-array satellite-televisionreception reception antenna according to claim 1, is characterized in that: the spacing between described polarization feeding network one and two is 2mm.
3. dual-polarization planar-array satellite-televisionreception reception antenna according to claim 1, is characterized in that: the length of side of described radiating element rectangular radiation loudspeaker is less than 1 λ.
4. dual-polarization planar-array satellite-televisionreception reception antenna according to claim 1, is characterized in that: divide E-T textural association to become 16 × 4 cell array antennas and 16 × unit 8 array antenna by copying of 2 × 2 cell array antennas with broadband etc.
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| CN106207439B (en) * | 2016-09-08 | 2023-03-24 | 中国电子科技集团公司第五十四研究所 | Double-circular-polarization antenna unit and array antenna |
| DE102016014385A1 (en) * | 2016-12-02 | 2018-06-07 | Kathrein-Werke Kg | Dual polarized horn |
| CN108183318A (en) * | 2017-12-28 | 2018-06-19 | 航天恒星空间技术应用有限公司 | A kind of compact double-circle polarization waveguide array antenna and its feed method |
| CN112490660A (en) * | 2020-11-17 | 2021-03-12 | 广东纳睿雷达科技股份有限公司 | Dual-polarized array antenna |
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