W-band high-gain zero-dispersion glass-based microstrip array antenna

Abstract

The invention discloses a W-band high-gain zero-dispersion glass-based microstrip array antenna, and belongs to the technical field of antennas. The W-band high-gain zero-dispersion glass-based microstrip array antenna sequentially comprises a radiation patch layer, a glass substrate and a reflecting plate layer from top to bottom, and the radiation patch layer comprises 16 series-fed microstrip patch subarrays and a set of hybrid feed network; each series-fed microstrip patch subarray comprises at least two radiation patches, the interval between the adjacent patches is 1 lambda g, and lambda g is the wavelength of a center frequency guide wave; the hybrid feed network comprises a one-to-eight unequal power divider 2 and eight one-to-two equal power dividers 3; and the spacing of each branch port in the one-to-eight unequal power divider is an integer multiple of the spacing of the wavelength of the guide wave. The antenna can improve the limitations of large feeder network loss, chromatic dispersion of beam pointing and the like of the current common microstrip array antenna, and is suitable for a high-precision real-time imaging system.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a W-band high-gain zero-dispersion glass-based microstrip array antenna. Background technique [0002] In recent years, the demand for high-precision real-time imaging systems in the field of security inspection and security is increasing day by day. Benefiting from shorter wavelengths and larger bandwidths, W-band real-time imaging systems are more popular. In order to be able to form a high-precision real-time image of the target to be measured, this type of system needs to have narrow beam characteristics, and for this reason it needs to be equipped with a large antenna aperture. In previous studies, the commonly used solution is to use parallel-fed microstrip array antennas. However, due to the long transmission path of the parallel-fed network, large feeder loss will occur, which affects the gain of the array antenna, and then affects the effectiveness of the real-time ima...

AI Technical Summary

Problems solved by technology

However, the series-fed microstrip array antenna has obvious dispersion due to the aperture transition, and the beams corresponding to different operating frequencies in the broadband working mode are inconsistent, which affects the imaging quality of the imaging system

This is an obvious drawback of series-fed microstrip array antennas, especially for large aperture / very large aperture array antennas, frequency domain dispersion will become unacceptable

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