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, which is an antenna array composed of several single leaky-wave antennas arranged in parallel; the left and right sides of a single leaky-wave antenna have different widths. Etc., each leaky-wave antenna is provided with a slot parallel to the transverse centerline of the antenna array, and the spacing between adjacent slots of each antenna is different; Connection; The array topology structure of the opposite direction feeding of adjacent single leaky-wave antennas proposed by the present invention realizes the natural symmetry of the near-field two-dimensional focusing antenna, and at the same time makes the width of the single leaky-wave antennas have complementary characteristics, and adjusts the left and right sides The width of the gap is relatively uniform, and the high-efficiency two-dimensional focusing under the simple series feed structure is realized through the first connection of the adjacent leaky-wave antennas fed in the opposite direction, which overcomes the existing near-field two-dimensional focusing antenna technical scheme. There are problems such as complex feeding, large polarization loss, and low radiation efficiency.

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...

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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

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