Microstrip sequential rotation array antenna based on series and parallel feeding network

Abstract

The invention discloses a microstrip sequential rotation array antenna based on a series and parallel feeding network. A first antenna unit, a second antenna unit, a third antenna unit and a fourth antenna unit in the array antenna are arranged on a first lambda / 4 microstrip impedance transformation line, a second lambda / 4 microstrip impedance transformation line, a third lambda / 4 microstrip impedance transformation line and a fourth lambda / 4 microstrip impedance transformation line in the series and parallel feeding network according to the serial rotation way; a feeding input end, a first feeding section, a second feeding section and a third feeding section on the series and parallel feeding network are serially arranged to form a three-quarter circular ring according to the signal input and output flow direction. The single antenna unit in the array antenna adopts the square corner cut patch design way, the processing and the forming are simple; furthermore, the single antenna unit adopts the microstrip line feeding way of allocating branches by bending, thereby being capable of leading a plurality of antenna units to conveniently constitute the array and configure at the same time of matching. When in array constituting process, the serial rotation array way and the series and parallel feeding network are adopted, thereby significantly improving the impedance bandwidth and the circular polarization purity of the antenna, reducing the loss of a feeding line and improving the gain.

Description

Technical field [0001] The present invention relates to a microstrip antenna structure suitable for communication systems, and more particularly, to a high-gain, circularly polarized, series-parallel feed network-based microstrip sequential rotating array antenna operating in the Ka band. . Background technique [0002] With the development of satellite communications, remote control, and telemetry technology, the expansion of radar application scope, and the need for tracking and measuring high-speed targets under various polarization methods and climate conditions, it is far difficult for a single polarization method to meet the requirements, and circularly polarized antennas application becomes very important. The use of circularly polarized antennas in radar can resist interference from clouds and rain; in electronic countermeasures, the use of circularly polarized antennas can interfere with and detect the opponent's various linearly polarized and elliptically polarize...

AI Technical Summary

Problems solved by technology

However, the frequency bands above the Ka band often have the disadvantages of large feed network loss and unreasonable spatial layout.

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