Single directional wide-band millimetre wave planar slot antenna

Abstract

This invention relates to a single-way broad band mm wave plane slot antenna, in which, a coplanar waveguide feed line and a rectangle slot radiation unit are set at a same plane on a side of a microwave base, a beam guiding slot is set on the other side of the base, the rectangle cut-off slot is set under the base closing to the rectangle slot radiation unit on a supporting structure, the beam guiding slot, the rectangle radiation slot unit and three-layer or over rectangle cut-off slots are concentric forming similar rectangles getting smaller from the top, this invented coplanar waveguide feed line and impedance can be adjusted easily and the feed part and the radiation unit are coplanar, the rectangle slot radiation unit can reach the requirement of broadband and single-way radiation can be realized by three-layer or more coplanar rectangle cut-off slot reflection structure steadily reduced at the back and a positive wavebeam leading structure.

Description

technical field [0001] The invention relates to an antenna in the technical field of communication, in particular to a unidirectional broadband millimeter-wave antenna based on micro-electromechanical system technology. Background technique [0002] With the development of satellite communications and the increasingly crowded radio channels, radio technology is developing towards shorter and shorter millimeter waves and submillimeter waves. Millimeter wave is between microwave and light wave, so it has the advantages of both. The main features are: extremely wide bandwidth, usually the frequency range of millimeter wave is 30GHz~300GHz; high resolution, the wavelength of millimeter wave is between 1mm and 10mm , the wavelength is much shorter than microwave, so it has higher resolution; compared with laser, it is less affected by climate and has all-weather working characteristics; compared with microwave, the size of millimeter wave components is much smaller, and it is eas...

AI Technical Summary

Problems solved by technology

For example, "Broadband CPW-Fed Square Slot Antennas With a Widened Tuning Stub" published by H.D. Chen in "IEEE Transactions on Antennas and Propagation" ("IEEE Transactions on Antennas and Propagation" VOL 51, (2003) 1982-1986) Coplanar waveguide fed wideband rectangular slot antenna"), this paper proposes to use a rectangular wide slot as the radiation unit, and add an adjustment branch to achieve a 60% bandwidth, but the disadvantage is that the antenna is bidirectional radiation and the gain is low

However, practice shows that simply adding a reflective ground plate to achieve unidirectional radiation will greatly affect the bandwidth, reflection loss and other performance of the antenna.

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