Single-port broadband dual-circular polarization dual-directional beam microstrip array antenna

Abstract

The invention discloses a single-port broadband dual-circular polarization dual-directional beam microstrip array antenna. The antenna comprises a radiation unit array (1) which is composed of circular radiation patches (1a) arranged periodically, a metal floor (2) provided with an H-shaped coupling gap (2a), a single-port feed network (3) composed of an equal-amplitude power division phase shiftfeed network (3c) or an unequal-amplitude power division phase shift feed network (3d), and a first dielectric substrate layer (4), a bonding layer (5) and a second dielectric substrate layer (6) aresequentially arranged from top to bottom. Each H-shaped coupling slot (2a) rotates at different angles around a respective geometric center, and the geometric center of each H-shaped coupling slot (2a) is located right below the circular radiation patch (1a). By using the structure of the invention, through designing the rotation angle of each H-shaped coupling slot (2a) and the amplitude and phase distribution of each output port (3b) of the single-port feed network (3), dual-circular polarization dual-directional radiation beams can be realized, and the antenna has the advantages of wide frequency band, low profile, simple manufacturing and the like.

Description

technical field [0001] The invention belongs to the field of wireless communication system electronic devices, and in particular relates to a single-port broadband dual-circular polarization dual-directional beam microstrip array antenna. When the input port is excited, it can generate dual circularly polarized and dual directional beams, that is, a left-handed beam and a right-handed beam, and the direction of each circularly polarized beam can be independently controlled, which is suitable for satellite communication and point-to-multipoint communication and point-to-multi-area coverage. Background technique [0002] With the development of satellite communication, remote control and telemetry technology, the expansion of radar application range, and the need to track and detect targets under various polarization and climatic conditions, it is difficult for linear polarization beams to meet the requirements. The circular polarization antenna application becomes very impor...

AI Technical Summary

Problems solved by technology

However, the traditional sequential rotation technology only utilizes the circular polarization component of a single hand direction of the linearly polarized wave, and the circular polarization component of the other hand direction is canceled, so at least half of the radiated power will be lost, resulting in gain loss. less than 50% efficient

And when using a single-port feed network, the unit rotation and feed phase arrangement of the traditional sequential rotation technology can only generate a single circularly polarized beam with a single direction of rotation

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