Common-aperture antenna compatible with Beidou Tiantong double-satellite system

Abstract

The utility model relates to the technical field of microwave array antennas, and particularly discloses a common-aperture antenna compatible with a Beidou Tiantong double-satellite system, which comprises a metal bottom plate and a microstrip antenna unit embedded in the metal bottom plate. The microstrip antenna unit comprises a Beidou short message receiving and transmitting frequency reconfigurable antenna unit, a Beidou B3 / B1 laminated antenna unit, a Beidou B3 / B2b laminated antenna unit, a Beidou B3 antenna unit, a Beidou B1 antenna unit and a Tiantong receiving and transmitting laminated antenna unit; the Tiantong transmit-receive laminated antenna units are arranged on the same circle with the center of the Beidou short message transmit-receive frequency reconfigurable antenna unit as the circle center. The Beidou B3 / B1 laminated antenna unit, the Beidou B3 / B2b laminated antenna unit, the Beidou B3 antenna unit and the Beidou B1 antenna unit are located between the Tiantong transmit-receive laminated antenna unit and the Beidou short message transmit-receive frequency reconfigurable antenna unit. According to the utility model, the common-caliber integration of the Beidou short message transceiving frequency reconfigurable antenna, the Beidou navigation anti-interference antenna, the Beidou direction-finding antenna and the Tiantong transceiving phased-array antenna can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical field more particularly to a kind of compatible with Beidou Tiantong dual-satellite system's common aperture antenna. BACKGROUND

[0002] Traditional radio frequency equipment usually only completes single combat task, and the corresponding antenna completes independent radio frequency function. With the increasingly complex modern electromagnetic environment, the communication, radar detection, navigation and other electronic information equipment used by electronic platform are greatly increased, leading to the continuous increase of antenna types and number, which brings many problems: first, various antennas are densely distributed, and too many independent antenna apertures are not conducive to the top-level design and optimization of electromagnetic compatibility; second, modern electronic platform has higher and higher integration requirements for radio equipment, and the space available for antenna use on equipment platform is continuously compressed, which requires effective integration of various function-independent antennas under limited antenna aperture. Therefore, based on the comprehensive needs of new generation electronic platform, aperture synthesis design must be carried out on different function antennas, and as few antenna apertures as possible are used to meet multi-functional requirements.

[0003] Tiantong No. 1 system (geosynchronous orbit, S-band) is China's satellite mobile communication system, which can provide voice, short message and data services for users; Beidou satellite navigation system can provide positioning, navigation, timing services and short message communication services for users. High-throughput communication satellite system (Ka and above frequency band) satellite terminal uses directional antenna, in order to ensure wideband communication capability, the array size and aperture are very large, and aperture synthesis with Beidou antenna cannot effectively improve space utilization and structural multiplexing. While Tiantong and Beidou systems both support omnidirectional antenna reception, the beam coverage space of their application terminal antennas is consistent, the working frequency bands are relatively close, the functions are complementary, and the array apertures are close, which are suitable for aperture synthesis design. The common aperture antenna compatible with Beidou Tiantong dual-satellite system has high aperture utilization rate and active module is easy to integrate. However, in current electronic platform, Beidou and Tiantong antennas mostly use independent apertures, and there is an urgent need to design a low-profile, small-aperture, high-performance common aperture antenna compatible with Beidou Tiantong dual-satellite system.

[0004] At present, there is little research on common aperture antenna compatible with Beidou Tiantong dual-satellite system, and there are certain deficiencies:

[0005] Chinese patent with publication number CN114914716A, named "a Beidou Tiantong integrated antenna", is composed of 1 Beidou short message transmitting antenna unit, 4 Beidou short message receiving antenna units, 4 Beidou B3 antenna units, 2 Beidou B1 antenna units and 8 Tiantong transceiving laminated antenna units. The antenna has Beidou short message receiving and transmitting functions, and arranges two Beidou B1 direction finding antennas through heteromorphism design. However, due to the separation arrangement of Beidou short message receiving and transmitting antennas in the array antenna, the space utilization is low.

[0006] The communication navigation integrated antenna in the patent application with the patent name of "a communication navigation integrated antenna" with the publication number of CN110401034A is composed of 24 array elements, including 1 Beidou short message transmitting antenna unit, 1 Beidou short message receiving antenna unit, 4 Beidou B3 antenna units, 2 Beidou B1 direction finding antenna units, 8 Tian Tong transmitting antenna units and 8 Tian Tong receiving antenna units, since the Tian Tong transmitting and receiving units are not arranged in a stacked co-aperture manner but in a parallel arrangement, the Tian Tong transmitting and receiving circular array has no effective space arrangement for the two Beidou B1 direction finding antennas, so that the baseline distance is limited and the direction finding precision is low.

[0007] The patent with the publication number of CN209766655U discloses a new satellite array antenna based on a planar phased array, and discloses that the satellite communication and satellite navigation integrated antenna is composed of 13 array elements, including 1 Beidou short message transmitting antenna unit, 4 Beidou short message receiving antenna units, 4 Beidou B3 antenna units (two of which are compatible with 2 Beidou B1 direction finding antenna units through stacked design) and 4 Tian Tong transmitting and receiving antenna units, the Tian Tong transmitting and receiving array of the antenna is a square array, the number of units is 4, and the array gain is low; meanwhile, the Beidou B1 direction finding antenna unit is not arranged independently, the baseline distance is limited by the layout of the Beidou B3 navigation anti-interference array, and the direction finding precision is low. Practical new type content

[0008] The technical problem to be solved by the utility model is to provide a co-aperture antenna compatible with Beidou and Tian Tong dual-satellite systems;

[0009] The solution adopted by the utility model to solve the technical problem is:

[0010] On the one hand:

[0011] A co-aperture antenna compatible with Beidou and Tian Tong dual-satellite systems, comprising a metal bottom plate and a microstrip antenna unit embeddedly installed on the metal bottom plate;

[0012] The microstrip antenna unit comprises a Beidou short message transceiving frequency reconfigurable antenna unit located at the center part of the metal bottom plate, one or two groups of Beidou B3 / B1 stacked antenna units, one group of Beidou B3 / B2b stacked antenna units, one group of Beidou B3 antenna units, one to four groups of Beidou B1 antenna units and four to eight groups of Tian Tong transmitting and receiving stacked antenna units;

[0013] The Tian Tong transmitting and receiving stacked antenna units are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center;

[0014] The Beidou B3 / B1 stacked antenna unit, the Beidou B3 / B2b stacked antenna unit and the Beidou B3 antenna unit are located between the Tianxi transceiving stacked antenna unit and the Beidou short message transceiving frequency reconfigurable antenna unit.

[0015] In some possible implementation manners, the Beidou B1 antenna units are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center and the radius B.

[0016] In some possible implementation manners, the Beidou B3 antenna unit, the Beidou B3 / B2b stacked antenna unit and the Beidou B3 / B1 stacked antenna unit are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center and the radius C; and B > C.

[0017] In some possible implementation manners, the Beidou B1 antenna units are four groups and are arranged at equal intervals, and a gap is formed between adjacent two groups of the Beidou B1 antenna units; and the Beidou B3 / B1 stacked antenna units are two groups.

[0018] The Beidou B3 antenna unit, the Beidou B3 / B2b stacked antenna unit and the two groups of Beidou B3 / B1 stacked antenna units are respectively located in the four gaps.

[0019] In some possible implementation manners, the diameter of the circle on which the Beidou B1 antenna units are located is 65.7 mm, and the distance between adjacent Beidou B1 antenna units is 93 mm.

[0020] In some possible implementation manners, the two groups of Beidou B3 / B1 stacked antenna units are symmetrically distributed, and the Beidou B3 antenna unit and the Beidou B3 / B2b stacked antenna unit are respectively located between the two groups of Beidou B3 / B1 stacked antenna units; the distance between the Beidou B3 / B1 stacked antenna unit and the Beidou short message transceiving frequency reconfigurable antenna unit is 70.4 mm, and the distance between the two groups of Beidou B3 / B1 stacked antenna units is 140.8 mm.

[0021] In some possible implementation manners, the Tianxi transceiving stacked antenna units are eight groups and are arranged at equal intervals, and each group of the Tianxi transceiving stacked antenna units comprises a co-aperture Tianxi transmitting antenna unit and a Tianxi receiving antenna unit.

[0022] The diameter of the circle on which the Tianxi transceiving stacked antenna units are located is 227.3 mm to 257.6 mm, and the distance between adjacent two groups of Tianxi transceiving stacked antenna units is 75.8 mm to 106.1 mm.

[0023] In some possible implementation manners, the Beidou short message transceiving frequency reconfigurable antenna unit comprises an antenna unit body and branches arranged on the antenna unit body, and the branches are four groups.

[0024] In some possible implementation manners, the Beidou short message transceiving frequency reconfigurable antenna unit, the Beidou B3 antenna unit and the Beidou B1 antenna unit are all double-fed antenna structures; the Tianxi transceiving laminated antenna unit is a laminated single-fed antenna structure; the Beidou B3 / B1 laminated antenna unit and the Beidou B3 / B2b laminated antenna unit are both laminated double-fed antenna structures.

[0025] In some possible implementation manners, the Beidou B3 / B1 laminated antenna unit comprises a B3 unit one embeddedly mounted on a metal bottom plate and coplanar with the upper surface of the metal bottom plate and a B1 unit mounted on the B3 unit one.

[0026] The Beidou B3 / B2b laminated antenna unit comprises a B3 unit two embeddedly mounted on a metal bottom plate and coplanar with the upper surface of the metal bottom plate and a B2b unit on the B3 unit two.

[0027] The Tianxi transmitting antenna unit is embeddedly mounted on a metal bottom plate and coplanar with the upper surface of the metal bottom plate; and the Tianxi receiving antenna unit is mounted on the Tianxi transmitting antenna unit.

[0028] The Beidou short message transceiving frequency reconfigurable antenna unit, the Beidou B1 antenna unit and the Beidou B3 antenna unit are respectively embedded on a metal bottom plate and coplanar with the upper surface of the metal bottom plate.

[0029] In some possible implementation manners, the utility model further comprises a radome mounted on the metal bottom plate and forming a mounting cavity with the metal bottom plate and an SMP connector embeddedly mounted on the metal bottom plate and located at the bottom of the metal bottom plate; and the microstrip antenna unit is located in the mounting cavity.

[0030] Compared with the prior art, the utility model has the advantages of:

[0031] The utility model can effectively realize the Beidou short message transceiving frequency reconfigurable antenna, the Beidou navigation anti-interference antenna, the Beidou direction finding antenna and the Tianxi transceiving phased array antenna co-caliber integration.

[0032] The Beidou short message transceiving frequency reconfigurable antenna in the utility model has simple antenna structure, stable performance and is easy to realize in engineering.

[0033] The utility model discloses a structure multiplex realizes low profile and miniaturization simultaneously, and each electric performance technical index such as voltage standing wave ratio, gain, axial ratio has good performance in the transceiving frequency band; the Beidou short message transceiving frequency reconfigurable antenna unit is located at the center of the metal bottom plate, and the center is the array center of the whole antenna, utilizes the microstrip antenna unit center zero field intensity channel, and the direct current bias circuit adopts the out-of-plane division wiring, avoids the influence circular polarization radiation structure;

[0034] The utility model discloses a structure multiplex realizes low profile and miniaturization simultaneously, and each electric performance technical index such as voltage standing wave ratio, gain, axial ratio has good performance in the transceiving frequency band; the Beidou short message transceiving frequency reconfigurable antenna unit is located at the center of the metal bottom plate, and the center is the array center of the whole antenna, utilizes the microstrip antenna unit center zero field intensity channel, and the direct current bias circuit adopts the out-of-plane division wiring, avoids the influence circular polarization radiation structure;

[0035] The microstrip antenna unit in the utility model is embedded in the metal bottom plate, and low profile is realized.

[0036] The utility model discloses a common aperture antenna, supports Beidou anti-interference navigation positioning, short message communication, north-seeking direction-finding function, simultaneously, based on Beidou positioning and double antenna north-seeking direction-finding, and the sky net array antenna can support the moving satellite communication, and through independent star searching, real -time tracking, alignment communication satellite.

[0037] The utility model realizes the unit miniaturization and array element high isolation characteristic, and in addition, makes full use of space and polarization isolation and carries out array flow design, realizes wave band multi -functional, multi -mode Beidou sky net antenna aperture integration design. ACCURACY OF DRAWINGS

[0038] Figure 1 It is the structure schematic diagram of common aperture antenna and metal bottom plate in the utility model;

[0039] Figure 2 It is the distribution schematic diagram of microstrip antenna unit in the utility model embodiment;

[0040] Figure 3 It is the schematic diagram of Beidou short message transceiving frequency reconfigurable antenna unit in the utility model;

[0041] Figure 4 It is the coordinate system definition schematic diagram in the utility model embodiment;

[0042] Among them: 1. Beidou short message transceiver frequency reconfigurable antenna unit; 11. Branch; 2. Beidou B3 / B1 stacked antenna unit; 21. B3 unit one; 22. B1 unit; 3. Tiantong transceiver stacked antenna unit; 31. Tiantong transmitting antenna unit; 32. Tiantong receiving antenna unit; 4. Beidou B1 antenna unit; 5. Beidou B3 antenna unit; 6. Beidou B3 / B2b stacked antenna unit; 61. B3 unit two; 62. B2b unit; 7. Metal base plate. DETAILED DESCRIPTION

[0043] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediary; they can refer to internal communication between two components or interactions between two components. The terms "first," "second," and similar terms mentioned in this application do not denote any order, quantity, or importance; they are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation; rather, they indicate the presence of at least one. In the implementation of this application, "and / or" describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more. For example, "plurality" refers to two or more positioning posts. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0044] The utility model is described in detail below.

[0045] Example 1:

[0046] like Figures 1-4 As shown, this embodiment provides a low-profile, small-aperture, high-performance, co-aperture antenna compatible with the Beidou-Tiantong dual-satellite system. The antenna has a clear principle, a simple structure, and is easy to implement in engineering. Through reconfigurable design, unit stacking design, and array manifold design, spatial multiplexing and effective multi-functional integration are achieved.

[0047] A co-aperture antenna compatible with the Beidou-Tiantong dual-satellite system includes a metal base plate 7, a radome mounted on the metal base plate 7 and forming a mounting cavity therebetween, a microstrip antenna unit embedded in the metal base plate 7, and an SMP connector embedded in the metal base plate 7 and located at the bottom of the metal base plate 7; the microstrip antenna unit is located in the mounting cavity and embedded in the metal base plate 7;

[0048] The microstrip antenna unit includes a Beidou short message frequency-reconfigurable antenna unit 1 located at the center of a metal base plate 7, two Beidou B3 / B1 stacked antenna units 2 with Beidou B3 / B1 dual-frequency dual-antenna RTK function, a Beidou B3 / B2b stacked antenna unit 6, a Beidou B3 antenna unit 5, four Beidou B1 antenna units 4, and eight Tiantong stacked antenna units 3. The Beidou short message frequency-reconfigurable antenna unit 1, Beidou B3 antenna unit 5, and Beidou B1 antenna unit 4 are all dual-feed antenna structures; the Tiantong stacked antenna unit 3 is a stacked single-feed antenna structure; the Beidou B3 / B1 stacked antenna unit 2 and Beidou B3 / B2b stacked antenna unit 6 are both stacked dual-feed antenna structures.

[0049] Each group of Tiantong transceiver stacked antenna units 3 includes a group of Tiantong transmitting antenna units 31 and a group of Tiantong receiving antenna units 32 with the same aperture;

[0050] The eight groups of Tiantong transceiver stacked antenna units 3 are on the same circle with the center of the Beidou short message transceiver frequency reconfigurable antenna unit 1 as the center;

[0051] The Beidou B3 / B1 stacked antenna unit 2, Beidou B1 antenna unit 4, Beidou B3 antenna unit 5, and Beidou B3 / B2b stacked antenna unit 6 are located between the Tiantong transceiver stacked antenna unit 3 and the Beidou short message transceiver frequency reconfigurable antenna unit 1;

[0052] The Beidou B1 antenna unit 4 is on the same circle with a center of the Beidou short message receiving and transmitting frequency reconfigurable antenna unit and a radius of B; the Beidou B3 / B1 stacked antenna unit 2, Beidou B3 antenna unit 5, and Beidou B3 / B2b stacked antenna unit 6 are on the same circle with a center of the Beidou short message receiving and transmitting frequency reconfigurable antenna unit and a radius of C; wherein B>C;

[0053] The Beidou B3 / B2b stacked antenna unit 6 is capable of receiving Beidou B2b global short messages. The Beidou B3 / B1 stacked antenna unit 2 is capable of Beidou B3 / B1 dual-frequency, dual-antenna RTK. The Beidou B3 / B2b stacked antenna unit 6, Beidou B3 / B1 stacked antenna unit 2, and Beidou B3 antenna unit 5 work together to form a Beidou B3 anti-interference four-element array for anti-interference.

[0054] The Beidou B3 / B1 stacked antenna unit 2 includes a B3 unit 21 embedded in the metal base plate 7 and coplanar with the upper surface of the metal base plate 7, and a B1 unit 22 installed on the B3 unit 21;

[0055] The Beidou B3 / B2b stacked antenna unit 6 comprises a B3 unit two 61 embeddedly mounted on the metal bottom plate 7 and coplanar with the upper surface of the metal bottom plate 7, and a B2b unit 62 on the B3 unit two 61;

[0056] Each of the above units (the Beidou short message transmitting and receiving frequency reconfigurable antenna unit, the B3 unit one 21, the B1 unit 22, the B3 unit two 61, the B2b unit 62, the Beidou B3 antenna unit 5, and the Beidou B1 antenna unit 4) is a two-layer structure and comprises a radiating patch dielectric substrate in the upper layer and a radio frequency feed network dielectric substrate in the lower layer. A dual-probe is used to feed the radiating patch dielectric substrate to realize a dual-polarization characteristic, and then a Wilkinson power divider in the form of a strip line is used to provide the required amplitude and phase characteristics of the two feed points of the antenna, the amplitude and phase characteristics being equal in amplitude and 90° in phase difference, so as to realize a circular polarization radiation characteristic. The B3 unit one 21, the B3 unit two 61, and the Beidou B3 antenna unit 5 all have an anti-interference function, only differing in size.

[0057] Meanwhile, in order to realize miniaturization and high isolation, the Beidou transmitting and receiving stacked antenna unit 3 uses a single-probe to realize a circular polarization performance.

[0058] In combination with Figure 1 , Figure 4 The four groups of Beidou B1 antenna units 4 are arranged in a square array form on the diagonal axes of the XOY plane, and the distance between the adjacent two groups of Beidou B1 antenna units 4 is 0.5λ 0,B1 , λ 0,B1 is the free space wavelength corresponding to the center frequency 1575.42 MHz of the RNSS B1 frequency band.

[0059] The Beidou B1 antenna unit 4 is four groups and is arranged at equal intervals, and a gap is formed between the adjacent two groups of Beidou B1 antenna units 4, and the four groups of Beidou B1 antenna units 4 form four gaps.

[0060] The Beidou B3 / B1 stacked antenna unit 2 is two groups; the Beidou B3 antenna unit 5, the Beidou B3 / B2b stacked antenna unit 6, and the two groups of Beidou B3 / B1 stacked antenna units 2 are respectively located in the above four gaps; and an interlaced arrangement is formed to reduce the coupling between the units.

[0061] In some possible embodiments, the diameter of the circle where the Beidou B1 antenna unit 4 is located is 65.7 mm, and the distance between the adjacent Beidou B1 antenna units 4 is 93 mm.

[0062] In some possible implementation manners, the two groups of the Beidou B3 / B1 stacked antenna units 2 are symmetrically distributed, and the Beidou B3 antenna unit 5 and the Beidou B3 / B2b stacked antenna unit 6 are respectively located between the two groups of the Beidou B3 / B1 stacked antenna units 2; the distance between the Beidou B3 / B1 stacked antenna unit 2 and the Beidou short message transceiving frequency reconfigurable antenna unit 1 is 70.4mm, and the distance between the two groups of the Beidou B3 / B1 stacked antenna units 2 is 0.6λ 0,B3 , λ 0,B3 is the free space wavelength corresponding to the center frequency 1268.52MHz of the RNSS B3 frequency band; specifically, 140.8mm.

[0063] The Beidou transceiving stacked antenna unit 3 is eight groups and is arranged at equal intervals, and is arranged in a circular array form on a circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit 1 as the center, and the arrangement points are 22.5°, 67.5°,..., 337.5° (interval 45°);

[0064] The diameter of the circle where the Beidou transceiving stacked antenna unit 3 is located is 1.5λ 0,ST ~1.75λ 0,ST , λ 0,ST is the free space wavelength corresponding to the center frequency 1995MHz of the Beidou transmitting frequency band; specifically, the diameter of the circle where the Beidou transceiving stacked antenna unit 3 is located is 227.3mm~257.6mm;

[0065] Further, the diameter of the circle where the Beidou transceiving stacked antenna unit 3 is located is 1.72λ 0,SR or 1.57λ 0,ST , λ 0,SR is the free space wavelength corresponding to the center frequency 1995MHz of the Beidou transmitting frequency band; that is, the diameter of the circle where the Beidou transceiving stacked antenna unit 3 is located is 236mm;

[0066] The distance between the adjacent two groups of the Beidou transceiving stacked antenna unit 3 is 0.5λ 0,ST ~0.7λ 0,ST , that is, the distance between the adjacent two groups of the Beidou transceiving stacked antenna unit 3 is 75.8mm~106.1mm

[0067] Further, the distance between the adjacent two groups of the Beidou transceiving stacked antenna unit 3 is 0.66λ 0,SR or 0.6λ 0,ST， , that is, 90.3mm;

[0068] Through the above setting, the Beidou transceiving stacked antenna unit 3 can realize the optimization of the feeding structure by using the microstrip antenna unit center zero field strength channel, and realize high isolation of transceiving similar frequency;

[0069] In some possible implementation manners, the Beidou short message transceiving frequency reconfigurable antenna unit 1 comprises an antenna unit body and branches 11 arranged on the antenna unit body, and the branches 11 are four groups;

[0070] Further, the antenna unit body can adopt the scheme disclosed in CN112038762A, a Beidou short message communication transceiving frequency reconfigurable antenna; four groups of branches 11 are arranged on the outer side thereof, and the antenna unit body is connected with other electronic devices; the branches 11 can also realize debugging of the antenna unit body and adjustment of the performance of the antenna unit body; the Beidou short message transceiving frequency reconfigurable antenna unit 1 is located at the center of the metal bottom plate 7, and utilizes a microstrip antenna unit center zero field strength channel, wherein a direct current bias circuit adopts out-of-plane distributed wiring to avoid affecting a circular polarization radiation structure.

[0071] Further, the polarization rotation of the TengTong transceiving stacked antenna unit 3 is left-handed circular polarization, the polarization rotation of the Beidou B3 antenna unit 5 and the Beidou B1 antenna unit 4 is right-handed circular polarization and is opposite to that of the TengTong transceiving stacked antenna unit 3, and polarization isolation is utilized to effectively reduce mutual coupling caused by close arrangement.

[0072] In the microstrip antenna unit in the utility model, each unit is an existing component, and the internal structure is not described here.

[0073] Further, the radome and the common-aperture antenna are installed on the metal bottom plate 7 through countersunk screws, and an SMP connector is embedded into the metal bottom plate 7, and a back feeding mode is adopted to feed the antenna unit.

[0074] The TengTong transmitting antenna unit 31 and the TengTong receiving antenna unit 32 in each group of TengTong transceiving stacked antenna units 3 are common-aperture, and in order to integrate a plurality of Beidou and TengTong transceiving stacked antenna units 3 in as small a diameter as possible and improve aperture utilization, the TengTong transceiving stacked antenna units are designed as uniform circular arrays and are rotationally arranged at the edge position of the metal bottom plate 7.

[0075] In order to effectively realize embedded installation of the microstrip antenna unit, the Beidou B3 / B1 stacked antenna unit 2 comprises a B3 unit one 21 embeddedly installed on the metal bottom plate 7 and coplanar with the upper surface of the metal bottom plate 7, and a B1 unit 22 installed on the B3 unit one 21.

[0076] In order to realize high gain, high isolation, low profile, light weight design, the microstrip antenna unit will be embedded in the metal base plate 7, the metal base plate, radome are circular structure; The microstrip antenna unit adopts square structure; The Beidou B3 / B2b stacked antenna unit 6 includes B3 unit two 61, B3 unit one 21 on B2b unit 62 embedded on the metal base plate 7 and coplanar with the upper surface of the metal base plate 7;

[0077] The sky transmits antenna unit 31 is embedded on the metal base plate 7 and coplanar with the upper surface of the metal base plate 7; The sky receiving antenna unit 32 is installed on the sky transmitting antenna unit 31;

[0078] The Beidou short message transceiver frequency reconfigurable antenna unit, Beidou B1 antenna unit 4, Beidou B3 antenna unit 5 are embedded on the metal base plate 7 and coplanar with the upper surface of the metal base plate 7.

[0079] The common aperture radome and the metal base plate 7 are designed as a circle, in order to realize high gain, high isolation, low profile, light weight design, the microstrip antenna unit is embedded in the metal base plate 7, realizes low profile, and the circular design is beneficial to the uniformity of the gain of the sky transceiver stacked antenna unit 3 when scanning in the azimuth plane, which adopts eight groups of settings, satisfies the demand of 384Kb / s general communication rate.

[0080] The utility model is not limited to the foregoing specific embodiments. The utility model extends to any new feature disclosed in this specification or any new combination, and any new method or process step or any new combination disclosed.

Claims

1. A common-aperture antenna compatible with the Beidou Tiantong dual-satellite system, characterized in that, The microstrip antenna unit is embeddedly installed on the metal base plate; The microstrip antenna unit comprises a Beidou short message transceiving frequency reconfigurable antenna unit located at a central part of the metal base plate, one or two groups of Beidou B3 / B1 laminated antenna units, one group of Beidou B3 / B2b laminated antenna units, one group of Beidou B3 antenna units, one to four groups of Beidou B1 antenna units and eight groups of TD-SCDMA transceiving laminated antenna units; The TD-SCDMA transceiving laminated antenna units are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center; The Beidou B3 / B1 laminated antenna units, the Beidou B3 / B2b laminated antenna units, the Beidou B3 antenna units and the Beidou B1 antenna units are located between the TD-SCDMA transceiving laminated antenna units and the Beidou short message transceiving frequency reconfigurable antenna unit.

2. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 1, characterized in that, The Beidou B1 antenna units are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center and a radius of B; the Beidou B3 antenna units, the Beidou B3 / B2b laminated antenna units and the Beidou B3 / B1 laminated antenna units are on the same circle with the center of the Beidou short message transceiving frequency reconfigurable antenna unit as the center and a radius of C; wherein B > C.

3. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 2, characterized in that, The Beidou B1 antenna units are four groups and are arranged at equal intervals, and a gap is formed between adjacent two groups of the Beidou B1 antenna units; the Beidou B3 / B1 laminated antenna units are two groups; The Beidou B3 antenna units, the Beidou B3 / B2b laminated antenna units and the two groups of Beidou B3 / B1 laminated antenna units are respectively located in the four gaps.

4. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 3, characterized in that, The diameter of the circle on which the Beidou B1 antenna units are located is 65.7 mm, and the distance between adjacent Beidou B1 antenna units is 93 mm.

5. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 2, characterized in that, The two groups of Beidou B3 / B1 laminated antenna units are symmetrically distributed, and the Beidou B3 antenna units and the Beidou B3 / B2b laminated antenna units are respectively located between the two groups of Beidou B3 / B1 laminated antenna units; the distance between the Beidou B3 / B1 laminated antenna units and the Beidou short message transceiving frequency reconfigurable antenna unit is 70.4 mm, and the distance between the two groups of Beidou B3 / B1 laminated antenna units is 140.8 mm.

6. The co-antenna of the Beidou Tiantong dual-satellite system according to any one of claims 1-5, characterized in that, The eight groups of TD-SCDMA transceiving laminated antenna units are arranged at equal intervals, and each group of the TD-SCDMA transceiving laminated antenna units comprises a TD-SCDMA transmitting antenna unit and a TD-SCDMA receiving antenna unit which are co-calibrated; The diameter of the circle on which the TD-SCDMA transceiving laminated antenna units are located is 227.3 mm to 257.6 mm, and the distance between adjacent two groups of the TD-SCDMA transceiving laminated antenna units is 75.8 mm to 106.1 mm.

7. The common-aperture antenna compatible with the Beidou Tian Tong dual-satellite system according to claim 6, characterized in that, The Beidou short message transceiving frequency reconfigurable antenna unit comprises an antenna unit body and a branch arranged on the antenna unit body, and the branch is four groups.

8. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 6, characterized in that, The Beidou B3 / B1 laminated antenna unit comprises a B3 unit one embeddedly installed on the metal base plate and co-planar with the upper surface of the metal base plate and a B1 unit installed on the B3 unit one; The Beidou B3 / B2b laminated antenna unit comprises a B3 unit two embeddedly installed on the metal base plate and co-planar with the upper surface of the metal base plate and a B2b unit on the B3 unit two; The Beidou transmitting antenna unit is embedded on the metal bottom plate and coplanar with the upper surface of the metal bottom plate; and the Beidou receiving antenna unit is installed on the Beidou transmitting antenna unit. The Beidou short message transceiving frequency reconfigurable antenna unit, the Beidou B1 antenna unit and the Beidou B3 antenna unit are respectively embedded on the metal bottom plate and coplanar with the upper surface of the metal bottom plate.

9. The common-aperture antenna compatible with the Beidou Tiantong dual-satellite system according to claim 1, characterized in that, The Beidou short message transceiving frequency reconfigurable antenna unit, the Beidou B3 antenna unit and the Beidou B1 antenna unit are all double-fed antenna structures; and the Beidou transceiving stacked antenna units are all stacked single-fed antenna structures. The Beidou B3 / B1 stacked antenna unit and the Beidou B3 / B2b stacked antenna unit are both stacked double-fed antenna structures.

10. The common-aperture antenna compatible with the Beidou Tiandi dual-satellite system according to claim 9, characterized in that, Further comprising a radome installed on the metal bottom plate and forming an installation cavity with the metal bottom plate, and an SMP connector embedded on the metal bottom plate and located at the bottom of the metal bottom plate; and the microstrip antenna unit is located in the installation cavity.

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