A Wide Beam Circularly Polarized Phased Array Antenna Unit

Abstract

The invention discloses a wide-beam circularly polarized phased array antenna unit, which relates to the fields of communication and measurement and control. The antenna unit includes a dielectric board and a feed connector. The same side of the dielectric board is engraved with a radiation patch and a microstrip line, and the other side of the dielectric board is the antenna floor; the radiation patch is a semicircle with a semicircular notch. shape patch. The present invention is designed according to the requirements of communication, measurement and control on polarization characteristics and installation space, and is a circularly polarized radiation unit structure with wide standing wave bandwidth, wide axial ratio bandwidth, and wide beam width; the present invention also has small size, easy integration, and realizable The "brick" phased array antenna design and other characteristics are especially suitable for the manufacture of high-performance low-profile circularly polarized antennas for aircraft carriers in communication and measurement and control systems.

Description

technical field [0001] The invention relates to a wide-beam circular polarization phased array antenna unit in the fields of communication and measurement and control. The invention is more suitable for use in communication and measurement and control systems requiring circular polarization phased array antennas. Background technique [0002] At present, the microstrip antennas that can form circular polarization in communication and measurement and control systems mainly have the following structural forms. Although they have their own characteristics in performance, they all have certain shortcomings. [0003] 1. Cutting angle circularly polarized microstrip antenna: This type of antenna has a simple structure and a low profile, but the axial ratio and standing wave bandwidth of the antenna are less than 2%. [0004] 2. Circularly polarized microstrip antenna form with external circularly polarized bridge. The axial ratio and standing wave bandwidth of this form of microst...

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Problems solved by technology

[0004] 2. Circularly polarized microstrip antenna form with external circularly polarized bridge. The axial ratio and standing wave bandwidth of this form of microstrip antenna are generally wider than 3dB. The axial ratio bandwidth is greater than 15%, and the standing wave bandwidth of less than 2 is greater than 20. %, but the external circular polarization bridge takes up a lot of space, the feeder is long, and the difference loss is large, which is not conducive to the integrated design of antenna and network

[0005] 3. Slot-coupled circularly polarized microstrip antenna. Compared with the traditional circularly polarized microstrip antenna, this form of circularly polarized microstrip antenna has the characteristics of wide impedance and axial ratio bandwidth, but due to the asymmetry of the slot structure, It is often necessary to load an isolation resistor to achieve a wider axial ratio bandwidth, which creates two problems: on the one hand, the isolation resistor requires manual welding, and when the array scale is large, it requires a huge workload, and it is difficult to ensure the consistency of unit welding On the other hand, the isolation resistance will produce a certain difference loss, resulting in different degrees of decline in radiation gain

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