CN209804884U - Broadband phased array antenna - Google Patents

Abstract

The utility model discloses a broadband phased array antenna increases parasitic paster layer on the paster layer of radiation through the adoption to set up annular gap and cross gap respectively on two pasters, adopt the mode of center feed simultaneously. The antenna further realizes the performance of the wide-axis ratio, circular polarization and high isolation of the antenna on the basis of meeting the requirement of the antenna broadband, and has the technical effect of improving the applicability of the phased array antenna.

Description

A Broadband Phased Array Antenna

technical field

The utility model relates to the technical field of electronic communication, in particular to a broadband phased array antenna.

Background technique

Among the existing microwave and millimeter wave phased array antennas, ultra-miniaturization, high integration, low cost, and tile-based antennas are the development trends in this field, but due to the immature processing technology of the current phased array antennas , The component specifications and dimensions of the phased array antenna are more limited by the process, and it is very difficult for the antenna products obtained in actual production to achieve broadband, wide-axis ratio, and high isolation.

At the same time, traditional large-scale arrays generally use simple probe-fed patch antennas in order to achieve integration. In conventional probe-fed circularly polarized microstrip antennas, the feeding position is mostly eccentric. The design is not convenient for the design of the feeder part in the array, especially in the integrated structure of high-frequency bands and high-density wiring. Moreover, the bandwidth of this type of antenna is very narrow, generally only 1%-7%. When it is applied to a large array, the coupling between the elements of the antenna is strong, and it is necessary to add isolation components between the elements to improve the isolation, but this method is bound to cause Further reduce the bandwidth.

What's more, the axial ratio bandwidth of the traditional antenna circularly polarized structure is very narrow, and the workload in the process of simulating and optimizing the axial ratio is very large.

It can be seen that there are technical problems in the prior art that phased array antennas are difficult to simultaneously satisfy broadband, wide-axis ratio, circular polarization and high isolation.

Utility model content

The present application provides a broadband phased array antenna, which is used to solve the technical problem that the phased array antenna in the prior art is difficult to satisfy broadband, wide-axis ratio, circular polarization and high isolation at the same time.

The application provides a broadband phased array antenna, including:

Microwave board;

The patch antenna unit includes a first radiation patch layer and a second radiation patch layer, the first radiation patch layer is arranged on the surface of the microwave board, includes a first dielectric board and is arranged on the first The first radiation patch on the dielectric board, the second radiation patch layer is overlapped on the first radiation patch layer, including a second dielectric board and a second radiation patch arranged on the second dielectric board patch;

Wherein, the first radiating patch is arranged between the first dielectric plate and the second dielectric plate, and the first radiating patch includes an annular gap and a probe for feeding the patch antenna unit. needles, and the second radiation patch includes cross slits.

Optionally, the first radiation patch is a square, and the shape of the annular slit is a square structure with open edges.

Optionally, the probe is arranged at the center of the annular gap, and the probe coincides with the center of the surface of the microwave board.

Optionally, the annular slit has a slit width greater than 0.1 mm.

Optionally, the size of the cross slot is a preset size, so that the axial ratio of the phased array antenna is less than or equal to 3.

Optionally, the center of the cross slit coincides with the probe.

Optionally, the first radiation patch includes two cut corners formed by cutting off two first diagonal corners.

Optionally, the first radiation patch includes two branches formed by extending two second diagonal corners.

Optionally, the thickness of the microwave board and the patch antenna unit is less than or equal to a preset thickness.

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

The phased array antenna in the embodiment of the present application adopts the method of adding a parasitic patch layer on the radiating patch layer, and setting a circular slot and a cross slot on the two patches, and adopting a center feeding mode at the same time. On the basis of satisfying the broadband requirements of the antenna, the wide-axis ratio, circular polarization and high isolation performance of the antenna are further realized, and the technical effect of improving the applicability of the phased array antenna is achieved.

Furthermore, the thickness of the microwave board and the patch antenna unit in the embodiment of the present application is less than or equal to the preset thickness, so it also has the advantages of improving the integration of large array antennas and effectively reducing the production cost of tile antennas technical effect.

Description of drawings

Fig. 1 is a structural diagram of the first radiation patch layer of the broadband phased array antenna provided by the embodiment of the present invention;

Fig. 2 is a structural diagram of the second radiation patch layer of the broadband phased array antenna provided by the embodiment of the present invention;

Fig. 3 is a three-dimensional structure diagram of the broadband phased array antenna provided by the embodiment of the present invention.

Detailed ways

The present application provides a broadband phased array antenna, which is used to solve the technical problem that the phased array antenna in the prior art is difficult to satisfy broadband, wide-axis ratio, circular polarization and high isolation at the same time.

The technical solution in the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

The phased array antenna in the embodiment of the present application adopts a parasitic patch layer added to the radiating patch layer, and a circular slot and a cross slot are respectively arranged on the two patches, and a central feeding method is adopted at the same time. On the basis of satisfying the broadband requirements of the antenna, the wide-axis ratio, circular polarization and high isolation performance of the antenna are further realized, and the technical effect of improving the applicability of the phased array antenna is achieved.

The technical solution of the present application will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations on the technical solution of the present application. In the case of no conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Embodiment one

Please refer to Fig. 1, Fig. 2 and Fig. 3. Embodiment 1 of the present application provides a broadband phased array antenna, including:

Microwave board 101;

The patch antenna unit includes a first radiation patch layer and a second radiation patch layer, the first radiation patch layer is arranged on the surface of the microwave board, includes a first dielectric board and is arranged on the first The first radiation patch 102 on the dielectric board, the second radiation patch layer is overlapped on the first radiation patch layer, including a second dielectric board and a second radiation patch arranged on the second dielectric board radiation patch 103;

Wherein, the first radiating patch 102 is arranged between the first dielectric plate and the second dielectric plate, and the first radiating patch 102 includes an annular gap 1021 and feeds the patch antenna unit. An electrical probe 1022, the second radiation patch includes a cross slit 1031.

The phased array antenna in the embodiment of the present application can use the second radiation patch layer 103 as a parasitic unit to increase the antenna bandwidth, so that even if the antenna bandwidth is narrowed by adding isolation components between the antenna elements of a large array In this case, the bandwidth of the phased array antenna in the embodiment of the present application can also meet the usage requirements.

During practical application, on the one hand, in the embodiment of the present application, the first radiation patch 102 may be square, and the shape of the annular gap is a square structure with open edges. The probe 1022 arranged on the first radiation patch 102 can feed the first radiation patch 102 and the second radiation patch 103, when the probe 1022 is arranged at the center of the annular gap 1021 position, and when the probe 1022 coincides with the center of the surface of the microwave board, the antenna in the embodiment of the present application can be fed in the center, which not only facilitates the feeding part of the large-scale array formation Moreover, impedance matching can be achieved at the center of the antenna in the embodiment of the present application by adjusting the size of the annular slot 1021, which is convenient for rotating arrays in large arrays. In order to meet the technological requirements at the current stage, the slot width of the annular slot 1021 is greater than 0.1 mm, and the size of the cross slot 1031 is a preset size, so that the axial ratio of the phased array antenna is less than or equal to 3. Further, the center of the cross slit 1031 may also coincide with the probe 1022 .

On the other hand, by setting the cross slot 1031 on the second radiation patch 103 , the axial ratio of the antenna can be effectively improved without affecting the bandwidth and impedance matching of the antenna.

Further, the first radiation patch 102 in the embodiment of the present application includes two cut corners 1023 formed by cutting off two first diagonal corners, and two branches formed by extending two second diagonal corners 1024. Therefore, the circular polarization performance of the antenna can be further improved.

It can be seen that the phased array antenna in the embodiment of the present application adopts the method of adding a parasitic patch layer on the radiation patch layer, and setting the annular slot 1021 and the cross slot 1031 on the two patches respectively, and adopts the center feed way of electricity. On the basis of satisfying the broadband requirements of the antenna, the wide-axis ratio, circular polarization and high isolation performance of the antenna are further realized, and the technical effect of improving the applicability of the phased array antenna is achieved.

Still further, the thickness of the microwave board and the patch antenna unit in the embodiment of the present application is less than or equal to a preset thickness. This is because during actual production and processing, the phased array antenna in the embodiment of the present application is processed integrally in a laminated form. In the case that the processing can be realized, the thickness of the antenna dielectric plate should be as thin as possible, and the number of layers should be as few as possible. Under the limitation of this kind of process, the antenna in the embodiment of the present application can still meet the broadband requirements, and the broadband performance can be improved by at least 30% compared with the traditional phased array antenna, so the phased array antenna in the embodiment of the present application also has The technical effect of improving the integration degree of the large array antenna and effectively reducing the production cost of the tile antenna.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (9)

1. A broadband phased array antenna, characterized in that, comprising: Microwave board; The patch antenna unit includes a first radiation patch layer and a second radiation patch layer, the first radiation patch layer is arranged on the surface of the microwave board, includes a first dielectric board and is arranged on the first The first radiation patch on the dielectric board, the second radiation patch layer is overlapped on the first radiation patch layer, including a second dielectric board and a second radiation patch arranged on the second dielectric board patch; Wherein, the first radiating patch is arranged between the first dielectric plate and the second dielectric plate, and the first radiating patch includes an annular gap and a probe for feeding the patch antenna unit. needles, and the second radiation patch includes cross slits. 2 . The phased array antenna according to claim 1 , wherein the first radiation patch is a square, and the shape of the annular slot is a square structure with open sides. 3 . 3 . The phased array antenna according to claim 2 , wherein the probe is arranged at the center of the annular slot, and the probe coincides with the center of the surface of the microwave board. 4 . 4. The phased array antenna according to claim 1, wherein the annular slot has a slot width greater than 0.1 mm. 5 . The phased array antenna according to claim 1 , wherein the size of the cross slot is a preset size so that the axial ratio of the phased array antenna is less than or equal to 3. 5 . 6. The phased array antenna according to claim 5, wherein the center of the cross slot coincides with the probe. 7. The phased array antenna according to claim 2, wherein the first radiation patch comprises two cut corners formed by cutting off two first diagonal corners. 8. The phased array antenna according to claim 2, wherein the first radiation patch comprises two branches formed by extending two second diagonal corners. 9. The phased array antenna according to claim 1, wherein the thickness of the microwave board and the patch antenna unit is less than or equal to a preset thickness.