Unequal power divider based on microstrip ridge-type gap waveguide

Abstract

The invention discloses an unequal power divider based on a microstrip ridge-type gap waveguide. The unequal power divider is composed of a dielectric plate of a through hole layer, an air gap layer and a metal cover plate on the air gap layer. The unequal power divider concretely comprises printed microstrip lines in the upper surface of the dielectric substrate, periodic metal pasters, periodic metalized through holes and a metal grounding plate, the metal grounding plate is in the lower surface of the dielectric plate of the through hole layer, and an air gap of certain height is left between the dielectric plate of the through hole layer and the metal cover plate in the upper layer; the microstrip lines are in short connection to the grounding plane via the metalized through hole arranged in a periodic way to form a micrstrip ridge type structure; and the metalized holes arranged in the periodic way are arranged in the surrounding of the printed microstrip line structure, and each metalized hole and the metal paster in the corresponding position form an EBG structure. Thus, problems in unequal power distribution ratio adjustment and phase adjustment of the microstrip ridge-type waveguide are solved, and the unequal power divider also has the advantages of being simple in structure, easy to integrate, easy to process, small in size, wide in bandwith, low in insertion loss and stable in structural performance.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an unequal power divider based on a microstrip ridge gap waveguide. Background technique [0002] For the millimeter wave band, especially the frequency band above 60 GHz, the traditional microstrip line and coplanar waveguide and other planar transmission lines will have high insertion loss due to dispersion and loss of dielectric materials, and due to size limitations, the processing accuracy On the other hand, rectangular waveguides and coaxial transmission lines are used due to low loss at high frequencies, but there are still problems in millimeter wave bands with complex machining techniques, high costs, and difficulty in integrating with active microwave electronic circuits . [0003] In 2009, Professor P.-S.Kildal from Sweden published "Waveguides based on local metamaterials in the gap between parallel metal plates" on IEEE Antenna and Wireless Propagation Letters (...

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Problems solved by technology

[0005] In 2014, Seyed Ali Razavi and Per-Simon Kildal published "2×2-Slotelement for 60-GHz planar array antenna realized on two doubled -sided PCBsusing SIW cavity and EBG-type soft surface fed by microstrip-ridge gapwaveguide”, in which multiple one-to-four microstrip gap waveguides are cascaded into a feed network as a feed structure for a 2*2 antenna subarray, but The method of power distribution ratio adjustment and phase matching of microstrip gap waveguide is not proposed in this paper

[0006] In 2015, Cao Baolin, Wang Hao and others published "High-Gain L-Probe Excited SubstrateIntegrated Cavity Antenna Array with LTCC-Based Gap Waveguide" in IEEE transactions on antennas and propagation journal (vol.63, no.12, December 2015). Feeding Network for W-Band Application", used LTCC technology to realize the equal power distribution structure of the gap waveguide, and realized wider bandwidth and phase matching, but also did not propose the unequal power distribution and phase adjustment method of the gap waveguide

[0007] It can be seen from the above that although the existing technology realizes the equal power distribution design of the microstrip ridge gap waveguide as the feed network, the above-mentioned articles and the existing published articles and patents do not mention the unequal power distribution of the microstrip ridge gap waveguide. Power distribution and phase matching method

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