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 inputand 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 unitadopts 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 andthe 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, more particularly, refers to a microstrip sequential rotating array antenna with high gain, circular polarization, and series-parallel feed network that works in the Ka band . Background technique [0002] With the development of satellite communication, remote control, and telemetry technology, the expansion of radar application range and the need for tracking and measurement of high-speed targets under various polarization modes and climatic conditions, a single polarization mode is far from meeting the requirements. Circularly polarized antennas application becomes very important. The use of circularly polarized antennas in radar can resist cloud and rain interference; in electronic countermeasures, the use of circularly polarized antennas can interfere with and detect radio waves of various linear and elliptical polarizations; A circularly 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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