Stereo Transition Structure Based on Air Gap Waveguide in Complex Feed Network

Abstract

The invention discloses a three-dimensional transition structure based on an air gap waveguide in a complex feeding network, which belongs to microwave components and includes a top layer board, a middle layer board and a bottom layer board, and the middle layer board is arranged between the top layer board and the bottom layer board. Specifically, the ideal conductance wall, artificial magnetic conductance wall, ridge gap waveguide structure, air gap waveguide-coupling gap matching structure, rectangular waveguide transition structure, national standard BJ400 rectangular waveguide coupling gap and electromagnetic bandgap EBG structure; electromagnetic waves can only Transmission along the specific guiding structure formed by the rectangular waveguide transition structure and ridge gap waveguide structure, air gap waveguide-coupling slot matching structure and national standard BJ400 rectangular waveguide coupling slot along the top plate; the electromagnetic bandgap EBG structure is periodically arranged in the ridge gap waveguide Surroundings, used to limit the leakage of electromagnetic waves to the surroundings. The invention realizes the transmission characteristic of low insertion loss under wide bandwidth.

Description

technical field [0001] The invention belongs to microwave components, in particular to a three-dimensional transition structure based on an air gap waveguide in a complex feeding network. Background technique [0002] In the past decade, a new transmission structure, the gap waveguide technology, has been proposed in the field of millimeter wave (mmW) applications. Based on this technology, a large number of microwave devices have been produced, such as antennas, filters, feed networks and couplers. The gap waveguide is realized by two parallel metal plates. The electromagnetic bandgap array is fabricated on the lower metal plate to form an artificial magnetic conduction surface, and the upper metal surface is an ideal electric wall. Except along some specific guiding structures, such as ridges and grooves, no electromagnetic waves can pass through the above structures if the gap between the top of the pin and the upper plate is less than a quarter wavelength. [0003] Lik...

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Problems solved by technology

[0004] Davoud Zarifi, Ali Farahbakhsh et al. in "Design and Fabrication of a High-Gain 60-GHz Corrugated Slot Antenna Array With Ridge Gap WaveguideDistribution Layer" (IEEE Trans. Antennas Propag, vol. 64, no. 7, pp. 2905-2913, July, 2016.) In the article, a 16 x 16 antenna transition transmission method from RGW to WR-15 is designed. The measured gain is greater than 32.5dBi, and the antenna efficiency exceeds 70%, but it does not mention how to reduce the insertion loss.

[0005] A. Farahbakhsh, D. Zarifi, etc. in "60-GHz groove gap waveguide basedwideband H -plane power dividers and transitions: For use in high-gain slotarray antenna" (IEEE Trans. Microw. Theory Techn, vol. 65, no. 11 , pp. 4111–4121, Nov. 2017.) In this paper, a power divider based on the groove gap waveguide (GGW) technology is designed, the gain is greater than 32.5dBi, and the total radiation efficiency exceeds 80% , but did not mention how to reduce the insertion loss

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