A dual-frequency co-boresight antenna suitable for wireless communication and satellite synchronization

Abstract

This invention discloses a dual-band common-aperture antenna, method, and apparatus for wireless communication and satellite synchronization, relating to the field of antenna technology. The antenna includes: a partially reflective surface, a feed antenna, and a reflective ground plane arranged sequentially, with the feed antenna located at the center of the reflective ground plane. The partially reflective surface includes a first dielectric substrate and a plurality of partially reflective surface units periodically distributed on the first dielectric. The feed antenna includes a first frequency band unit and a second frequency band unit stacked together, with the first frequency band corresponding to the first frequency band unit being higher than the second frequency band corresponding to the second frequency band unit. The reflective ground includes a fourth dielectric substrate and a plurality of artificial magnetic conductor structure units periodically distributed on the fourth dielectric substrate. The first frequency band units are disposed near the partially reflective surface, and the second frequency band units are disposed near the reflective ground plane. This invention can be used simultaneously for dual-band operation of satellite time synchronization and wireless communication, achieving high spatial reuse and cost savings.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more specifically to a dual-frequency common-aperture antenna suitable for wireless communication and satellite synchronization. Background Technology

[0002] In the rail transit sector, branch contact network faults are prone to occur in large hub areas and station tracks. It is necessary to locate these faults and promptly address them to ensure safe operation. This requires current detection devices distributed across different branch contact networks to collect fault current data simultaneously. Since the timing of each current detection device may not be synchronized, it is also necessary to synchronize their times with GPS time. Only then can the current signals carrying time stamps be transmitted to the data merging unit. This requires a single antenna to achieve both GPS satellite time synchronization and Zigbee wireless communication signal transmission and reception.

[0003] Therefore, designing an antenna suitable for GPS satellite time synchronization and Zigbee wireless communication is an important issue that the industry urgently needs to address. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a dual-band common-aperture antenna suitable for wireless communication and satellite synchronization, in order to solve the problem of needing a single antenna to achieve GPS satellite time synchronization and the transmission and reception of signals in two frequency bands of Zigbee wireless communication.

[0005] According to a first aspect, embodiments of the present invention provide a dual-band common-aperture antenna suitable for wireless communication and satellite synchronization, the antenna comprising:

[0006] The device includes a partial reflective surface, a feed antenna, and a reflective ground plane. The feed antenna is embedded in the center of the reflective ground plane. The partial reflective surface is disposed on the side of the reflective ground plane on which the feed antenna is embedded, and a resonant cavity is formed between the partial reflective surface and the reflective ground plane.

[0007] The partial reflective surface includes a first dielectric substrate and a plurality of partial reflective surface units periodically distributed on the first dielectric.

[0008] The feed antenna includes a first frequency band unit and a second frequency band unit stacked together, wherein the first frequency band corresponding to the first frequency band unit is higher than the second frequency band corresponding to the second frequency band unit.

[0009] The reflective floor includes a fourth dielectric substrate and a plurality of artificial magnetic conductor structural units periodically distributed on the fourth dielectric substrate.

[0010] An opening is formed on the fourth dielectric substrate, the feed antenna is embedded in the opening, and the first frequency band unit is located between the second frequency band unit and the first dielectric substrate.

[0011] In conjunction with the first aspect, in the first embodiment of the first aspect, the first dielectric substrate has a first surface and a second surface disposed opposite to each other, each of the partial reflective surface units includes a first reflective metal patch and a second reflective metal patch, the first reflective metal patch being periodically attached to the first surface, the second reflective metal patch being periodically attached to the second surface, and the first reflective metal patch and the second reflective metal patch in the same partial reflective surface unit being coaxially disposed.

[0012] In conjunction with the first embodiment of the first aspect, in the second embodiment of the first aspect, the first frequency band unit includes a second dielectric substrate and a first frequency band antenna. The second dielectric substrate has a third surface and a fourth surface disposed opposite to each other. The first frequency band antenna is attached to the third surface. The second frequency band unit includes a third dielectric substrate and a second frequency band antenna. The third dielectric substrate has a fifth surface and a sixth surface disposed opposite to each other. The second frequency band antenna is attached to the fifth surface and is in contact with the fourth surface.

[0013] The first frequency band antenna has a pair of first chamfers spaced 180° apart, and the second frequency band antenna has a pair of second chamfers spaced 180° apart. The two first slices formed by the two first chamfers are arranged parallel to each other, and the two second slices formed by the two second chamfers are arranged parallel to each other. The first chamfer and the second chamfer are arranged parallel to each other.

[0014] The first frequency band antenna is positioned directly opposite the partially reflective surface, and the first frequency band corresponding to the first frequency band antenna is higher than the second frequency band corresponding to the second frequency band antenna.

[0015] In conjunction with the second embodiment of the first aspect, in the third embodiment of the first aspect, the reflective ground plane is composed of a fourth dielectric substrate and a plurality of periodically distributed artificial magnetic conductor structural units. Each artificial magnetic conductor structural unit includes a metal capacitor patch and a metal ground plane. The fourth dielectric substrate has a seventh surface and an eighth surface disposed opposite to each other. The metal capacitor patch is periodically attached to the seventh surface, and the metal ground plane is periodically attached to the eighth surface. Furthermore, the metal capacitor patch and the metal ground plane in the same artificial magnetic conductor structural unit are coaxially disposed.

[0016] The sixth surface is in contact with the metal floor, and the feed probes of both the first band antenna and the second band antenna pass through the metal floor.

[0017] In conjunction with the first embodiment of the first aspect, in the fourth embodiment of the first aspect, the first reflective metal patch is a circular patch, and the second reflective metal patch is a square patch with a circular cutout, wherein the circular cutout matches the first reflective metal patch.

[0018] In conjunction with the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the diameter of the first reflective metal patch exceeds the diameter of the circular cutout.

[0019] In conjunction with the fifth embodiment of the first aspect, in the sixth embodiment of the first aspect, the diameter of the first reflective metal patch is 40.4 mm, the side length of the second reflective metal patch is 50 mm, the diameter of the circular cutout is 38.5 mm, and the thickness of the first dielectric substrate is 3.175 mm.

[0020] In conjunction with the third embodiment of the first aspect, in the seventh embodiment of the first aspect, the metal capacitor patch is an annular patch, and the metal floor is a square base plate.

[0021] In conjunction with the seventh embodiment of the first aspect, in the eighth embodiment of the first aspect, the outer diameter of the metal capacitor patch does not exceed the side length of the metal ground plate.

[0022] In conjunction with the eighth embodiment of the first aspect, in the ninth embodiment of the first aspect, the outer diameter of the metal capacitor patch is 37mm, the side length of the metal ground plate is 40mm, and the thickness of the fourth dielectric substrate is 6.35mm.

[0023] The dual-band common-aperture antenna for wireless communication and satellite synchronization provided by this invention possesses partial reflection characteristics in both high and low frequency bands through the arrangement of a partial reflective surface, enabling a dual-band high-gain antenna design. Using a dual-band fed antenna as the radiating feed source satisfies the radiation requirements of dual-band dual-circular polarization while facilitating feed design and simplifying the antenna structure. The use of an artificial magnetic conductor reflective ground plane instead of a traditional metal ground plane satisfies the resonance conditions of a dual-band antenna at the same resonant cavity height, simplifying the antenna structure; furthermore, it reduces the antenna profile height and shrinks the antenna volume. This antenna can simultaneously operate for GPS satellite time synchronization and Zigbee wireless communication, offering high spatial reuse, cost savings, and suitability for fault location in branch contact networks. Attached Figure Description

[0024] The features and advantages of the invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the drawings:

[0025] Figure 1This is a schematic diagram of a structure for wireless communication and satellite synchronization according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of a portion of the reflective surface in a dual-frequency common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0027] Figure 3 This is a reflection amplitude and phase diagram of a PRS element in a dual-frequency common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the feed antenna in a dual-frequency common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of the reflector floor in a dual-frequency common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0030] Figure 6 This is a reflection phase diagram of the AMC element in a dual-frequency common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0031] Figure 7 This is a low-frequency standing wave ratio and axial ratio curve of a dual-band common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0032] Figure 8 This is a high-frequency standing wave ratio and axial ratio curve of a dual-band common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0033] Figure 9 This is the low-frequency radiation pattern of a dual-band common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application;

[0034] Figure 10 This is the high-frequency radiation pattern of a dual-band common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In electrified railways, the overhead contact system is subject to various factors, including diverse structures, complex operating environments, open-air installation without backups, susceptibility to lightning strikes, equipment malfunctions (loosening, detachment, burnout, etc.), and external environmental factors (bird damage, dangerous trees, foreign objects, etc.). For example, the pantograph draws current from the contact system during locomotive operation, resulting in a dynamic operating environment. The contact system in large hub areas and station tracks is particularly vulnerable due to its more complex structure, making branch contact system faults more likely and turning it into a weak link in the traction power supply system. Therefore, quickly locating and addressing faults in electrified railways is crucial for ensuring transportation safety.

[0037] However, when a fault occurs in a branch contact network, the current detection devices distributed in different branches need to collect the fault current at the same time. However, the time of each current detection device may not be synchronized. It is necessary to synchronize the time of each current detection device with the GPS time to make the time of each current detection device synchronized, and then add a time stamp to the current detected by each current detection device.

[0038] In some cases, the current sensing device can be installed on the overhead contact line cantilever arm. The current signal it collects needs to be transmitted to the data merging unit. Communication between the current sensing device and the data merging unit is achieved through wireless communication methods such as Zigbee.

[0039] For fault location in branch contact networks, transceiver antennas are required for both GPS satellite time synchronization and Zigbee wireless communication. A single antenna must be able to transmit and receive signals across both frequency bands; that is, one antenna needs to receive the GPS time synchronization signal from the current detection device and also be used for wireless communication with the data merging unit. Furthermore, the transceiver antennas installed on the branch contact networks require small size and light weight, imposing strict requirements on the size and cost of the antenna equipment.

[0040] Therefore, it is necessary to design a small-sized, high-gain antenna suitable for GPS satellite time synchronization and Zigbee wireless communication.

[0041] To address the aforementioned issues, this embodiment provides a dual-band common-aperture antenna for wireless communication and satellite synchronization. Figure 1 This is a schematic diagram of the structure of a dual-band common-aperture antenna for wireless communication and satellite synchronization according to an embodiment of the present invention, as shown below. Figure 1As shown, this antenna is a dual-frequency, dual-circularly polarized, common-aperture Fabry-Perot resonator (FP) antenna suitable for wireless communication and satellite synchronization. This antenna achieves dual-frequency, dual-circularly polarized radiation within the same radiating aperture. The low-frequency radiation at 1.575 GHz is left-handed circularly polarized for GPS satellite time synchronization; the high-frequency radiation at the Zigbee operating band is right-handed circularly polarized for wireless communication. Specifically, the antenna includes:

[0042] The partially reflective surface (PRS) 1, the feed antenna 2, and the reflective ground plane 3 are arranged. The feed antenna 2 is located at the center of the reflective ground plane 3, that is, the feed antenna 2 is placed at the center of the reflective ground plane 3. The partially reflective surface 1 is arranged on the side of the reflective ground plane 3 where the feed antenna 2 is embedded. A resonant cavity is formed between the partially reflective surface 1 and the reflective ground plane 3.

[0043] In this embodiment of the invention, there is a certain height difference between the partial reflective surface 1 and the reflective ground 3. The upper partial reflective surface 1 and the lower reflective ground 3 constitute a resonant cavity. The two can be fixed by several nylon pillars. Specifically, there is a certain gap between the lower surface of the partial reflective surface 1 and the upper surface of the feed antenna 2 and the reflective ground 3. This gap forms a resonant cavity.

[0044] The partial reflective surface 1 includes a first dielectric substrate 11 and a number of partial reflective surface elements periodically distributed on the first dielectric 11. In the FP antenna, the electromagnetic waves radiated by the feed are continuously reflected in the resonant cavity, and the electromagnetic waves transmitted through the partial reflective surface 1 are superimposed in phase, thereby improving the antenna directivity by sharpening the beamwidth.

[0045] The feed antenna 2 includes a first frequency band unit and a second frequency band unit stacked together. The first frequency band corresponding to the first frequency band unit is higher than the second frequency band corresponding to the second frequency band unit. As the radiation source of the FP antenna, the performance of the feed antenna 2 determines the overall performance of the FP antenna. In this embodiment of the invention, a dual-frequency, dual-circularly polarized feed antenna is used.

[0046] The resonance condition of the FP antenna is shown in Equation (1).

[0047]

[0048] Where, Φ PRS Φ represents the reflection phase of partially reflecting surface 1; CND λ represents the reflection phase of the reflector 3; λ represents the wavelength of the electromagnetic wave; and λ represents the height of the resonant cavity of the antenna.

[0049] As shown in formula (1), when the reflection phase of the electromagnetic wave in the resonant cavity satisfies a certain relationship with the path phase difference, the phase of the electromagnetic wave transmitted through the reflecting surface 1 is the same. The antenna gain can be improved by sharpening the antenna pattern. Traditional FP antennas use a metal ground plane. According to the boundary conditions of the electromagnetic field, the reflection phase of the electromagnetic wave by the metal is π. Usually, the reflection phase of the PRS is π. Therefore, the resonant cavity height of the traditional FP antenna is λ / 2. However, for dual-band FP antennas, if the frequency ratio is not an integer multiple, it is difficult to satisfy the resonance condition of the dual-band FP antenna with a low resonant cavity height using a metal ground plane.

[0050] Unlike traditional metal floors, this invention uses an artificial magnetic conductor (AMC) structure as the reflector floor for the FP antenna.

[0051] The reflector floor 3 includes a fourth dielectric substrate 31 and a plurality of AMC units periodically distributed on the fourth dielectric substrate 31; an opening is formed in the fourth dielectric substrate 31, the feed antenna 2 is embedded in the opening, and the first frequency band unit is located between the second frequency band unit and the first dielectric substrate.

[0052] In order to be applicable to fault location of branch contact networks, the antenna needs to provide spatial reuse rate. In the embodiment of the present invention, the antenna is designed with a common aperture to improve spatial reuse rate and can transmit and receive signals in two frequency bands: GPS satellite time synchronization and Zigbee wireless communication.

[0053] Specifically, this antenna employs a single-layer resonant cavity structure to achieve dual-frequency, dual-circular polarization radiation, resulting in high aperture utilization and a simple structure. This reduces antenna size while saving costs, making it more suitable for fault location in branch contact networks.

[0054] Replacing the traditional metal floor with an AMC floor satisfies the resonance conditions of a dual-band antenna at the same resonant cavity height, simplifying the antenna structure. On the other hand, it reduces the antenna profile height and shrinks the antenna volume.

[0055] This invention provides a dual-band, common-aperture antenna for wireless communication and satellite synchronization. Through the inclusion of a partial reflective surface 1, it exhibits partial reflection characteristics in both high and low frequency bands, enabling a dual-band, high-gain design. The dual-band fed antenna 2 serves as the antenna's radiation feed source, satisfying the radiation requirements of dual-band, dual-circular polarization while facilitating feed design and simplifying the antenna structure. The use of an artificial magnetic conductor reflective base plate 3 instead of a traditional metal ground plane satisfies the resonance conditions of the dual-band antenna at the same resonant cavity height, simplifying the antenna structure. Furthermore, it reduces the antenna's profile height and size. This antenna can simultaneously operate for GPS satellite time synchronization and Zigbee wireless communication, offering high spatial reuse, cost savings, and suitability for fault location in branch contact networks.

[0056] The following is combined Figures 2 to 10 The present invention describes a dual-frequency common-aperture antenna for wireless communication and satellite synchronization.

[0057] Please see Figure 2 The first dielectric substrate 11 has a first surface and a second surface disposed opposite to each other, the first surface and the second surface corresponding to the upper surface and the lower surface of the first dielectric substrate 11, respectively. Each PRS unit includes a first reflective metal patch 12 and a second reflective metal patch 13. The first reflective metal patch 12 is periodically attached to the first surface, and the second reflective metal patch 13 is periodically attached to the second surface. Moreover, the first reflective metal patch 12 and the second reflective metal patch 13 in the same part of the reflective surface unit are coaxially arranged. The first reflective metal patch 12 is a circular patch, and the second reflective metal patch 13 is a square patch with a circular cutout, that is, a circular slot is formed on a square patch. The circular cutout matches the first reflective metal patch 12. It can be understood that the center of the first reflective metal patch 12 is coaxially arranged with the center of the circular cutout, and the circular cutout is located at the center of the square patch.

[0058] The PRS unit can meet the high-gain performance requirements of FP antennas in both frequency bands, and the PRS unit has a centrally symmetric structure, which has the same working performance for circularly polarized electromagnetic waves.

[0059] In this embodiment of the invention, the diameter of the first reflective metal patch 12 exceeds the diameter of the circular cutout, so as to leave a certain amount of redundancy.

[0060] In this embodiment of the invention, the first reflective metal patch 12 and the second reflective metal patch 13 are both printed on the surface of the first dielectric substrate 11, wherein the second reflective metal patch 13 has a circular cutout etched on the printed patch surface.

[0061] Please see Figure 3When electromagnetic waves are incident on the PRS element, some of the energy is reflected in the 1.575 GHz and 2.4 GHz frequency bands, with reflection amplitudes of 0.84 and 0.87, and reflection phases of 216° and 167°, respectively. For this antenna, its directivity coefficient D... r It can be derived from formula (2) that the larger the reflection coefficient ρ of the PRS, the larger the antenna directivity coefficient D. r The larger the value, the higher the gain.

[0062]

[0063] In this embodiment of the invention, the first dielectric substrate 11 is made of Rogers 5880 material with low loss.

[0064] In a preferred embodiment of the present invention, the diameter of the first reflective metal patch 12 is 40.4 mm, the side length of the second reflective metal patch 3 is 50 mm, the diameter of the circular cutout is 38.5 mm, and the thickness of the first dielectric substrate 11 is 3.175 mm.

[0065] Please see Figure 4 The first frequency band unit includes a second dielectric substrate 21 and a first frequency band antenna 22. The second dielectric substrate 21 has a third surface and a fourth surface that are disposed opposite to each other. The third surface and the fourth surface correspond to the upper surface and the lower surface of the second dielectric substrate 21, respectively. The third surface is disposed directly opposite to the second surface. The first frequency band antenna 22 is attached to the third surface. The second frequency band unit includes a third dielectric substrate 23 and a second frequency band antenna 24. The third dielectric substrate 23 has a fifth surface and a sixth surface that are disposed opposite to each other. The fifth surface and the sixth surface correspond to the upper surface and the lower surface of the third dielectric substrate 22, respectively. The sixth surface is disposed directly opposite to the seventh surface of the fourth dielectric substrate 31. The second frequency band antenna 24 is attached to the fifth surface and is attached to the fourth surface, thereby stacking the first and second frequency band units. The first band antenna 22 is provided with a pair of first chamfers spaced 180° apart, and the second band antenna 24 is provided with a pair of second chamfers spaced 180° apart. The two first slices formed by the two first chamfers are arranged parallel to each other, and the two second slices formed by the two second chamfers are arranged parallel to each other. The first chamfer and the second chamfer are arranged parallel to each other.

[0066] The first frequency band antenna 22 is positioned directly opposite the partial reflective surface 1, and the sixth surface is positioned directly opposite the metal ground 33 of the reflective ground 3. The first frequency band corresponding to the first frequency band antenna 22 is higher than the second frequency band corresponding to the second frequency band antenna 24.

[0067] Preferably, both the first and second frequency band antennas 22 and 24 are microstrip patch antennas, and the patch area of ​​the first frequency band antenna 22 is smaller than the patch area of ​​the second frequency band antenna 24.

[0068] The feed antenna 2 is a microstrip patch antenna with coaxial feeding. On the one hand, it forms circular polarization radiation by forming mutually orthogonal currents with a phase difference of 90° by chopping the patch corners. On the other hand, it achieves dual circular polarization radiation in two frequency bands by dual coaxial feeding. The first and second frequency band antennas 22 and 24 are simple to feed with microstrip patches and have a compact structure. Their dual-frequency circular polarization is achieved by stacking and chopping.

[0069] In this embodiment of the invention, the second and third dielectric substrates 21 and 23 are both made of Rogers 5880 material with low loss.

[0070] Please see Figure 5 The reflector ground 3 is composed of a fourth dielectric substrate 31 and a number of periodically distributed AMC units. Each AMC unit includes a metal capacitor patch 32 and a metal ground 33. The fourth dielectric substrate 31 has a seventh surface and an eighth surface that are arranged opposite to each other. The seventh surface and the eighth surface correspond to the upper surface and the lower surface of the fourth dielectric substrate 31, respectively. The metal capacitor patch 32 is periodically attached to the seventh surface, and the metal ground 33 is periodically attached to the eighth surface. In addition, the metal capacitor patch 32 and the metal ground 33 in the same AMC unit are coaxially arranged. At the same time, the metal ground 33 is attached to the sixth surface of the third dielectric substrate 23. That is, the feed antenna 2 and the AMC unit share the metal ground 33. The feed probes of the first band antenna 22 and the second band antenna 24 pass through the metal ground 33 and are fed from below the metal ground 33 by a coaxial line.

[0071] In this embodiment of the invention, the metal capacitor patch 32 is an annular patch, and the metal ground plate 33 is a square base plate. The outer diameter of the metal capacitor patch 32 does not exceed the side length of the metal ground plate 33.

[0072] Please see Figure 6 The AMC unit has the ability to control the phase of electromagnetic wave reflection and can calculate the phase distribution that satisfies the resonance condition in the dual frequency band according to formula (1).

[0073] By using an AMC structure as the reflector ground plane, high-gain radiation of a dual-band antenna is achieved at the same resonant cavity height, avoiding the complex structure of using a multi-layer resonant cavity structure, and reducing the overall profile height of the antenna, thus reducing the antenna volume.

[0074] In a preferred embodiment of the present invention, the thickness of both the second dielectric substrate 21 and the third dielectric substrate 23 is 3.175 mm.

[0075] In a preferred embodiment of the present invention, the outer diameter of the metal capacitor patch 32 is 37mm, the side length of the metal ground plate 33 is 40mm, the thickness of the fourth dielectric substrate 31 is 6.35mm, the sum of the thicknesses of the second dielectric substrate 21 and the third dielectric substrate 23 is equal to the thickness of the fourth dielectric substrate 31, and the sum of the thicknesses of the second dielectric substrate 21, the second band antenna 24, and the third dielectric substrate 23 exceeds the thickness of the fourth dielectric substrate 31.

[0076] After full-wave simulation optimization, the antenna achieved good reflection and radiation effects. Figure 7 As shown, the FP antenna exhibits an impedance bandwidth of less than -10dB in the 1.555-1.634GHz frequency band, an axial ratio of less than -3dB in the 1.559-1.581GHz frequency band, and achieves good circular polarization radiation within the 1575.42MHz±1.023MHz frequency band, meeting the application requirements for GPS satellite time synchronization. Figure 8 As shown, the FP antenna exhibits an impedance bandwidth of less than -10 dB in the 2.421-2.523 GHz frequency band and an axial ratio of less than -3 dB in the 2.428-2.449 GHz frequency band, demonstrating excellent circularly polarized radiation performance and meeting the application requirements of Zigbee wireless communication. The radiation pattern of this antenna is shown below. Figure 9 and Figure 10 As shown, the antenna has dual-band gains of 10dBi and 14.5dBi, respectively, with low sidelobe levels and good high-gain radiation characteristics.

[0077] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0078] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of software media. This computer software media can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several commands to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-frequency co-boresight antenna suitable for wireless communication and satellite synchronization, characterized in that, The antenna includes: The device includes a partial reflective surface (1), a feed antenna (2), and a reflective floor (3). The feed antenna (2) is embedded in the center of the reflective floor (3). The partial reflective surface (1) is disposed on the side of the reflective floor (3) where the feed antenna (2) is embedded. A resonant cavity is formed between the partial reflective surface (1) and the reflective floor (3). The partial reflective surface (1) includes a first dielectric substrate (11) and a plurality of partial reflective surface units periodically distributed on the first dielectric substrate (11); The feed antenna (2) includes a first frequency band unit and a second frequency band unit stacked together, wherein the first frequency band corresponding to the first frequency band unit is higher than the second frequency band corresponding to the second frequency band unit; The reflective floor (3) includes a fourth dielectric substrate (31) and a number of artificial magnetic conductor structural units periodically distributed on the fourth dielectric substrate (31); An opening is formed on the fourth dielectric substrate (31), the feed antenna (2) is embedded in the opening, and the first frequency band unit is located between the second frequency band unit and the first dielectric substrate (11). The first dielectric substrate (11) has a first surface and a second surface disposed opposite to each other. Each of the partial reflective surface units includes a first reflective metal patch (12) and a second reflective metal patch (13). The first reflective metal patch (12) is periodically attached to the first surface, and the second reflective metal patch (13) is periodically attached to the second surface. Furthermore, the first reflective metal patch (12) and the second reflective metal patch (13) in the same partial reflective surface unit are coaxially disposed. The first frequency band unit includes a second dielectric substrate (21) and a first frequency band antenna (22). The second dielectric substrate (21) has a third surface and a fourth surface disposed opposite to each other. The first frequency band antenna (22) is attached to the third surface. The second frequency band unit includes a third dielectric substrate (23) and a second frequency band antenna (24). The third dielectric substrate (23) has a fifth surface and a sixth surface disposed opposite to each other. The second frequency band antenna (24) is attached to the fifth surface and is in contact with the fourth surface. The first band antenna (22) is provided with a pair of first chamfers spaced 180° apart, and the second band antenna (24) is provided with a pair of second chamfers spaced 180° apart. The two first slices formed by the two first chamfers are arranged parallel to each other, and the two second slices formed by the two second chamfers are arranged parallel to each other. The first chamfer and the second chamfer are arranged parallel to each other. The first frequency band antenna (22) is positioned directly opposite the partial reflective surface (1), and the first frequency band corresponding to the first frequency band antenna (22) is higher than the second frequency band corresponding to the second frequency band antenna (24).

2. The dual-frequency co-boresight antenna suitable for wireless communication and satellite synchronization according to claim 1, characterized in that, The reflective floor (3) is composed of a fourth dielectric substrate (31) and a plurality of artificial magnetic conductor structural units arranged periodically. Each artificial magnetic conductor structural unit includes a metal capacitor patch (32) and a metal ground plate (33). The fourth dielectric substrate (31) has a seventh surface and an eighth surface arranged opposite to each other. The metal capacitor patch (32) is periodically attached to the seventh surface, and the metal ground plate (33) is periodically attached to the eighth surface. Furthermore, the metal capacitor patch (32) and the metal ground plate (33) in the same artificial magnetic conductor structural unit are arranged coaxially. The sixth surface is attached to the metal floor (33), and the feed probes of the first band antenna (22) and the second band antenna (24) both pass through the metal floor (33).

3. The dual-frequency co-boresight antenna suitable for wireless communication and satellite synchronization according to claim 1, characterized in that, The first reflective metal patch (12) is a circular patch, and the second reflective metal patch (13) is a square patch with a circular cutout, the circular cutout matching the first reflective metal patch (12).

4. The dual-frequency common-aperture antenna suitable for wireless communication and satellite synchronization according to claim 3, characterized in that, The diameter of the first reflective metal patch (12) exceeds the diameter of the circular cutout.

5. The dual-band common-aperture antenna suitable for wireless communication and satellite synchronization according to claim 4, characterized in that, The diameter of the first reflective metal patch (12) is 40.4 mm, the side length of the second reflective metal patch (13) is 50 mm, the diameter of the circular cutout is 38.5 mm, and the thickness of the first dielectric substrate (11) is 3.175 mm.

6. The dual-frequency common-aperture antenna suitable for wireless communication and satellite synchronization according to claim 2, characterized in that, The metal capacitor patch (32) is an annular patch, and the metal floor (33) is a square base plate.

7. The dual-frequency common-aperture antenna suitable for wireless communication and satellite synchronization according to claim 6, characterized in that, The outer diameter of the metal capacitor patch (32) does not exceed the side length of the metal floor (33).

8. The dual-band common-aperture antenna suitable for wireless communication and satellite synchronization according to claim 7, characterized in that, The outer diameter of the metal capacitor patch (32) is 37 mm, the side length of the metal ground plate (33) is 40 mm, and the thickness of the fourth dielectric substrate (31) is 6.35 mm.

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