Multi-frequency integrated antenna

Abstract

A multi-frequency integrated antenna disclosed by the present invention comprises a micro-strip quasi-yagi antenna, a micro-strip patch array antenna, an antenna support and an antenna metal mounting plate, the micro-strip patch array antenna is fixed on the antenna metal mounting plate through a polyimide screw, and the micro-strip quasi-yagi antenna is fixed on the antenna support through a polyimide screw. And the antenna bracket is fixed on the antenna metal mounting plate through a screw. The antenna adopts a common-caliber design, is compact in structure, has a high caliber utilization rate, and reduces the mutual influence of the microstrip quasi-yagi antenna and the microstrip patch array antenna through the reasonable layout of the antenna array. The antenna has the advantages of multiple frequency bands, high gain, high aperture efficiency and the like, and can better meet actual project engineering application.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular, to a multi-frequency integrated antenna. Background Art

[0002] In recent years, the rapid development of wireless communication has put forward higher requirements for antenna systems: multi-band, wide-band, and common-aperture antennas can reasonably design multiple antennas with different frequencies and polarization characteristics within the same aperture. While maintaining a compact structure, they also have the performance of multi-band and multi-polarization operation, which is the future development trend of wireless communication antennas.

[0003] In the existing technologies, there are various methods to realize the design of multi-frequency common-aperture antennas, such as multi-frequency common-aperture microstrip antenna arrays, dual-frequency waveguide slots, substrate integrated waveguide / slots (dipoles), etc. The antennas in the existing technologies usually use the way of stacking high-frequency and low-frequency antennas or interspersing array elements to realize the common-aperture design, and cannot solve the problem of reducing the mutual influence between high-frequency and low-frequency array elements while achieving a simple structure, and cannot meet the requirement of simultaneously realizing circular polarization and linear polarization operation at high and low frequencies. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-frequency integrated antenna to solve the existing technical problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A multi-frequency integrated antenna includes a microstrip quasi-Yagi antenna, a microstrip patch array antenna, an antenna bracket, and an antenna metal mounting plate. The microstrip patch array antenna is fixed on the antenna metal mounting plate through polyimide screws, the microstrip quasi-Yagi antenna is fixed on the antenna bracket through polyimide screws, and the antenna bracket is fixed to the antenna metal mounting plate through screws.

[0006] Preferably, the microstrip quasi-Yagi antenna includes a dielectric substrate, a slot line, a printed dipole, directors, a reflector, and a stub microstrip line. The stub microstrip line is on one side of the dielectric substrate, and the slot line, the printed dipole, the directors, and the reflector are on the other side of the dielectric substrate. When the antenna works, the energy is coupled to the slot line through the circular stub microstrip line, and then flows along the slot line from the starting end to the printed dipole and the directors in the direction of the opening at the end of the slot line.

[0007] Preferably, one end of the slot line is circular, and the other end is a slotted opening with a gradual change structure.

[0008] Preferably, the end of the microstrip stub line is circular.

[0009] Preferably, the microstrip patch array antenna includes an upper dielectric substrate and a lower dielectric substrate. The main radiation patches are etched on the upper dielectric substrate, with a total of 256 patches, and the metal floor and the feeding network are etched on the lower dielectric substrate.

[0010] Preferably, the main radiation patch is square and has two chamfers.

[0011] Preferably, the metal floor is provided with slots, and the number of slots is the same as the number of main radiation patches. The position of each slot is directly below the main radiation patch, and each slot is divided into one horizontal slot and two vertical slots.

[0012] Preferably, the microstrip patch array antenna adopts an unequal-spacing design. The array scale is 16*16 and is divided into four 8*8 sub-arrays. The sub-array spacing is enlarged. Four microstrip quasi-Yagi antennas are symmetrically arranged around the center point of the multi-frequency integrated antenna in the sub-array gap of the microstrip patch array antenna to reduce the occlusion of the microstrip quasi-Yagi antennas on the microstrip patch array antenna.

[0013] Preferably, the radiation structure of the microstrip quasi-Yagi antenna is composed of a slot line, a printed dipole, directors and a reflector, and the feeding structure is composed of a stub microstrip line. The width of the slot line is designed to be gradually changed to improve the bandwidth of the microstrip quasi-Yagi antenna.

[0014] Preferably, the material of the antenna bracket is selected as polyimide to ensure the structural strength while reducing the influence on the antenna performance.

[0015] Compared with the prior art, the present invention has the following advantages: In the design of the present invention, the microstrip quasi-Yagi antenna and the microstrip patch array antenna are integrated within the same aperture, and the microstrip quasi-Yagi antenna is rotationally symmetric along the center of the integrated antenna. The microstrip patch array antenna is divided into 4 sub-arrays, and the microstrip quasi-Yagi antenna is arranged in the sub-array gap of the microstrip patch array antenna to reduce the occlusion between the antennas, improving the problems of limited space of the co-aperture antenna and mutual occlusion of different types of antennas.

[0016] The present invention is ingeniously designed in structure. In order to well solve the fixing reliability between the microstrip quasi-Yagi antenna and the microstrip patch array antenna, an antenna metal mounting plate and an antenna bracket are provided. The microstrip patch array antenna is fixed on the antenna metal mounting plate by polyimide screws, the microstrip quasi-Yagi antenna is fixed on the antenna bracket by polyimide screws, and the antenna bracket is fixed to the antenna metal mounting plate by screws. The materials of the antenna bracket and the mounting screws are both polyimide, which have high structural strength while reducing the influence on the antenna performance and have good practical engineering application value.

[0017] The antenna adopts a co-aperture design, is structurally compact, has a high aperture utilization rate, and reduces the mutual influence between the microstrip quasi-Yagi antenna and the microstrip patch array antenna through the reasonable layout of the antenna array. It has the advantages of multiple frequency bands, high gain, high aperture efficiency, etc., and can better meet the actual project engineering applications. Description of the Drawings

[0018] Figure 1 It is a top view of the frequency integrated antenna structure of the present invention.

[0019] Figure 2 This is the front view of the multi - frequency integrated antenna structure of the present invention.

[0020] Figure 3 This is the front view of the Yagi - Uda antenna structure of the present invention.

[0021] Figure 4 This is the rear view of the Yagi - Uda antenna structure of the present invention.

[0022] Figure 5 This is the three - dimensional structure view of the patch array antenna with the present invention.

[0023] Figure 6 This is the structure diagram of the main radiation patch of the patch array antenna with the present invention Figure 7 This is the structure diagram of the ground plane of the patch array antenna with the present invention.

[0024] Figure 8 This is the structure diagram of the feed network of the patch array antenna with the present invention.

[0025] Figure 9 This is the simulation result diagram of the multi - frequency integrated antenna of the present invention (where a is the simulation result of the radiation gain diagram of the microstrip patch array antenna; b is the simulation result of the radiation gain diagram of the microstrip quasi - Yagi - Uda antenna).

[0026] Figure 10 This is the measured result diagram of the multi - frequency integrated antenna of the present invention (where a is the measured result of the radiation gain diagram of the microstrip patch array antenna; b is the measured result of the radiation gain diagram of the microstrip quasi - Yagi - Uda antenna).

[0027] In the figure: microstrip quasi - Yagi - Uda antenna 1, microstrip patch array antenna 2, antenna bracket 3, antenna metal mounting plate 4, dielectric substrate 5, slot line 6, printed dipole 7, director 8, reflector 9, stub microstrip line 10, upper dielectric substrate 11, lower dielectric substrate 12, main radiation patch 13, metal ground plane 14, feed network 15, slot 16. Detailed implementation mode

[0028] The present invention will be further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] A multi - frequency integrated antenna includes a microstrip quasi - Yagi - Uda antenna 1, a microstrip patch array antenna 2, an antenna bracket 3 and an antenna metal mounting plate 4. The microstrip patch array antenna 2 is fixed on the antenna metal mounting plate 4 by polyimide screws, the microstrip quasi - Yagi - Uda antenna 1 is fixed on the antenna bracket 3 by polyimide screws, and the antenna bracket 3 is fixed on the antenna metal mounting plate 4 by screws.

[0030] The microstrip quasi-Yagi antenna 1 includes a dielectric substrate 5, a slot line 6, a printed dipole 7, directors 8, a reflector 9, and a stub microstrip line 10. The stub microstrip line 10 is on one side of the dielectric substrate 5, and the slot line 6, the printed dipole 7, the directors 8, and the reflector 9 are on the other side of the dielectric substrate 5. When the antenna works, energy is coupled to the slot line 6 through the circular stub microstrip line 10, and then flows along the slot line 6 from the starting end to the printed dipole 7 and the directors 8 in the direction of the end opening of the slot line 6.

[0031] One end of the slot line 6 is circular, and the other end is a slotted opening with a gradient structure.

[0032] The end of the microstrip stub line 10 is circular.

[0033] The microstrip patch array antenna includes an upper dielectric substrate 11 and a lower dielectric substrate 12. The main radiation patches 13 are etched on the upper dielectric substrate 11, with a total of 256 patches. The metal floor 14 and the feeding network 15 are etched on the lower dielectric substrate 12.

[0034] The main radiation patch 13 is square and has two cut corners.

[0035] The metal floor 14 is provided with slots 16. The number of slots 16 is the same as the number of main radiation patches 13. The position of each slot 16 is directly below the main radiation patch 13. Each slot 16 has a transverse slot and two longitudinal slots.

[0036] The microstrip patch array antenna 2 adopts an unequal-spacing design. The array scale is 16*16, which is divided into four 8*8 sub-arrays. The spacing between the sub-arrays is increased. Four microstrip quasi-Yagi antennas 1 are symmetrically arranged around the center point of the multi-band integrated antenna in a rotational manner in the gaps between the sub-arrays of the microstrip patch array antenna 2 to reduce the occlusion of the microstrip quasi-Yagi antenna 1 on the microstrip patch array antenna 2.

[0037] The radiation structure of the microstrip quasi-Yagi antenna 1 is composed of a slot line 6, a printed dipole 7, directors 8, and a reflector 9. The feeding structure is composed of a stub microstrip line 10. The width of the slot line 6 is designed with a gradient to improve the bandwidth of the microstrip quasi-Yagi antenna.

[0038] The material of the antenna bracket 3 is selected as polyimide to reduce the influence on the antenna performance while ensuring the structural strength.

[0039] Appendix Figure 9 is the simulation result diagram of the multi-band integrated antenna. Appendix Figure 10 is the measured result of the multi-band integrated antenna. It can be seen from the figure that the radiation gain index of the multi-band integrated antenna is excellent, and dual-band common-aperture operation can be achieved. The multi-band integrated antenna is measured, and the measured result is in good agreement with the simulation result.

[0040] The above is a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions, and variations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A multi-frequency integrated antenna, characterized in that: The invention comprises a microstrip quasi-Yagi antenna (1), a microstrip patch array antenna (2), an antenna bracket (3) and an antenna metal mounting plate (4), wherein the microstrip patch array antenna (2) is fixed to the antenna metal mounting plate (4) by means of polyimide screws, the microstrip quasi-Yagi antenna (1) is fixed to the antenna bracket (3) by means of polyimide screws, and the antenna bracket (3) is fixed to the antenna metal mounting plate (4) by means of screws.

2. A multi-frequency integrated antenna as claimed in claim 1, characterized in that: The microstrip quasi-Yagi antenna (1) comprises a dielectric substrate (5), a slot line (6), a printed vibrator (7), a director (8), a reflector (9) and a short stub microstrip line (10). The short stub microstrip line (10) is on one side of the dielectric substrate (5), and the slot line (6), the printed vibrator (7), the director (8) and the reflector (9) are on the other side of the dielectric substrate (5). When the antenna is in operation, energy is coupled to the slot line (6) through the circular short stub microstrip line (10), and then flows along the starting end of the slot line (6) to the printed vibrator (7) and the director (8) in the direction of the opening of the end of the slot line (6).

3. A multi-frequency integrated antenna as claimed in claim 2, characterized in that: One end of the groove line (6) is circular, and the other end is an open groove with a gradient structure.

4. The multi-frequency integrated antenna according to claim 2, characterized in that: The end of the microstrip stub (10) is circular.

5. The multi-frequency integrated antenna according to claim 1, characterized in that: The microstrip patch array antenna comprises an upper dielectric substrate (11) and a lower dielectric substrate (12); a main radiation patch (13) is etched on the upper dielectric substrate (11); and a metal floor (14) and a feeding network (15) are etched on the lower dielectric substrate (12).

6. The multi-frequency integrated antenna according to claim 5, characterized in that: The main radiation patch is (13) square and has two cut corners.

7. The multi-frequency integrated antenna according to claim 5, characterized in that: The metal floor (14) is provided with slots (16), the number of the slots (16) being the same as the number of the main radiation patches (13), each slot (16) being located directly below the main radiation patches (13), and each slot (16) being divided into one transverse slot and two longitudinal slots.

8. The multi-frequency integrated antenna according to claim 1, characterized in that: The microstrip patch array antenna (2) adopts an unequal spacing design, with an array size of 16*16, divided into four 8*8 sub-arrays, and the sub-array spacing is enlarged. Four microstrip quasi-Yagi antennas (1) are rotationally symmetrically arranged at the sub-array gap of the microstrip patch array antenna (2) along the center point of the multi-frequency integrated antenna as the origin, thereby reducing the shielding of the microstrip quasi-Yagi antenna (1) on the microstrip patch array antenna (2).

9. The multi-frequency integrated antenna according to claim 1, characterized in that: The radiation structure of the microstrip quasi-Yagi antenna (1) is composed of a slot line (6), a printed vibrator (7), a director (8) and a reflector (9), the feeding structure is composed of a short-stub microstrip line (10), and the width of the slot line (6) is designed to be gradually varied.

10. The multi-frequency integrated antenna according to claim 1, characterized in that: The material of the antenna bracket (3) is polyimide.

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