Compact broadband circular polarizer

Abstract

The invention provides a compact broadband circular polarizer which comprises a square-circle converter, a mode converter, a reflecting back cavity and a feed source. The square-circle converter is connected to the upper end of the mode converter through a flange plate, and the reflecting back cavity and the feed source are connected and are connected to the lower end of the mode converter through the flange plate. The compact broadband circular polarizer is simple in structure, small in size, capable of covering wide frequency bands, capable of using the same circular polarizer for meeting the demands of mobile communications, satellite communications, short distance communications, broadband access communications and digital TV receiving with different standards in different areas, capable of meeting the demand for system miniaturization, and wide in application prospect.

Description

technical field [0001] The invention relates to a circular polarizer, in particular to a compact broadband circular polarizer based on a stepped partition and a reflective back cavity. Background technique [0002] With the development of modern communication, remote control, and telemetry technology, as well as the need for tracking and measurement of high-speed targets in various polarization modes and climatic conditions, a single linear polarization is easily affected, and polarization deterioration or polarization mismatch occurs. It is far from meeting the requirements of modern communication. Circularly polarized antennas can resist polarization deterioration and polarization mismatch very well, and show good advantages in harsh weather conditions such as clouds and rain and electronic interference environments, and are more sensitive and accurate in capturing violently shaking targets. There are many ways to implement circularly polarized antennas. The most common w...

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Problems solved by technology

According to the literature search of the existing technology, it is found that a circular polarizer widely used in the market is a square waveguide diaphragm circular polarizer HD-51.99SWSPS, but the feeding method of this circular polarizer is complicated and requires Three microwave ports, bulky, not conducive to system miniaturization

In the IEEE2011 International Symposium, Ilkyu Kim, YahyaRahmat-Samii and others proposed a circular polarizer in the article "Revisiting Stepped Septum Circular Polarizer Using Full-Wave Simulations". The circular polarizer is also large in size and In practical applications, it is necessary to design a complex matching system, which is not conducive to system design and installation

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