Multi-beam antenna of substrate integrated wave-guide based on principal of Rotman lens

Abstract

The invention relates to a substrate integrated waveguide multiple beam antenna based on the Lotman lens principle. A substrate integrated waveguide similar to a waveguide structure is realized through an upper layer metal copper-clad surface (1), a lower layer metal copper-clad surface (2) and metalized pylomes (4) on a medium substrate (3), and a multiple beam antenna is formed; the structure of the multiple beam antenna is divided into three parts that: the first part is a substrate integrated waveguide Lotman lens (53); the second part is a substrate integrated waveguide dephasing network (8); the third part is a radiation antenna array (91), wherein, the first part is directly cascaded with the second part; and the second part is directly cascaded with the third part. The antenna is suitable for a microwave millimeter wave beam shaping network and a multiple beam antenna feeder system; the substrate integrated waveguide multiple beam antenna formed by the antennas can be applied to a microwave millimeter wave multiple beam system and an intelligent antenna, and has the advantages of improving the quality of a communication channel, reducing the sending power, bit error rate and multipath interference, etc.

Description

technical field [0001] The substrate-integrated waveguide Rotman (Rotman) lens of the present invention can be applicable to the beamforming network of microwave millimeter wave and multi-beam antenna feeder system, and the substrate-integrated waveguide multi-beam antenna formed by it can be applied to microwave millimeter-wave multi-beam system And smart antennas can bring advantages such as improving communication channel quality, reducing transmission power and bit error rate, and reducing multipath interference. Background technique [0002] With the rapid development of mobile communications, traditional multiple access methods, such as CDMA, FDMA, and TDMA, cannot meet the growing needs of capacity expansion. The multi-beam antenna generates multiple fixed parallel beams through the beamforming network, which are used to cover the entire user area, so as to achieve the purpose of capacity expansion. The Rotman lens is a multi-beam forming network, which has the advan...

AI Technical Summary

Problems solved by technology

With the increase of operating frequency, especially when it enters the Ka frequency band or even the millimeter wave frequency band, the huge loss makes the Rotman lens composed of traditional planar circuits such as microstrip lines unable to work normally, and it cannot be realized due to its small size.

If a metal waveguide is used to realize the Rotman lens, although its performance is excellent, it will have problems such as difficult processing, high cost, and heavy weight.

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