High efficiency substrate integrated waveguide leaky-wave slot array antenna for near-field two-dimensional focusing

Abstract

The invention provides a high efficiency substrate integrated waveguide leaky-wave slot array antenna for near-field two-dimensional focusing. The antenna is compose of a plurality of single leaky wave antennas arranged in parallel. The width of each leaky wave antenna is different from the left to the right. Each leaky wave antenna is provided with a slot parallel to the transverse centerline ofthe antenna array, and the spacing between adjacent slots of each antenna is different. The arrangement direction of adjacent single leaky wave antennas is reversed, and the head and the end are connected in turn. The invention discloses an array topology structure fed by adjacent single leaky wave antennas in reverse direction, the natural symmetry of the near-field two-dimensional focusing antenna is realized. At that same time, the width of a single leaky wave antenna has complementary characteristic, By adjusting the width of the left and right sides to obtain a relatively uniform slot distribution, the high efficiency two-dimensional focusing with simple series-fed structure is realized through the first connection of adjacent reverse-fed leaky wave antennas, which overcomes the problems of complex feeding, large polarization loss and low radiation efficiency existing in the existing two-dimensional focusing antenna technology in the near field.

Description

technical field [0001] The invention belongs to the field of near-field focusing antennas, and in particular relates to a high-efficiency substrate integrated waveguide leaky-wave slot array antenna for near-field two-dimensional focusing of millimeter waves. Background technique [0002] With the wide application of near-field focusing antennas in the fields of microwave and millimeter wave imaging, wireless power transmission, access control and radio frequency identification, the requirements for antenna efficiency and two-dimensional focusing capabilities are getting higher and higher. Different from the far-field antenna array, the near-field focused antenna array has higher requirements on the phase and amplitude control capabilities of the transmission structure, and needs to produce a square-law-changing aperture phase distribution and a balanced radiation energy distribution, which puts forward higher requirements for antenna design. . [0003] As a commonly used a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of complex feeding, large polarization loss, and low radiation efficiency existing in the above-mentioned existing near-field two-dimensional focusing antenna technical solutions

Images