Broadband slot-coupled multilayer microstrip antenna based on substrate-integrated waveguide feeding

Abstract

The invention discloses a broadband slot coupling multi-layer microstrip antenna based on substrate integrated waveguide feeding, which mainly solves the problems of narrow band width and poor gain stability of the existing microstrip antenna. The antenna comprises a parasitic patch (1), a first dielectric substrate (2), a main radiation patch (3), a second dielectric substrate (4), an upper floor(5), a feeding structure (6) and a lower floor (7). The parasitic patch (1) is located on the lower surface of the first dielectric substrate (2), the main radiation patch (3) is located on the uppersurface of the second dielectric substrate (4), the upper floor (5) is located on the upper surface of the feeding structure (6), and the lower floor (7) is located on the lower surface of the feeding structure (6); A longitudinal gap (51) is etch on that upper floor (5) for coupling energy from the fee structure (6); An air layer is arranged between the parasitic patch (1) and the main radiationpatch (3) for widening the antenna bandwidth. The invention improves working bandwidth and gain stability, and can be applied to 5G communication and radar system.

Description

technical field [0001] The invention belongs to the technical field of antennas, and further relates to a broadband multilayer microstrip antenna, which can be used in 5G communication and radar systems. Background technique [0002] The substrate-integrated waveguide adopts printed circuit board PCB technology or low-temperature co-fired ceramic LTCC technology, etc., and forms two rows of parallel metallized through holes closely arranged on the dielectric substrate. Due to the small distance between the through holes, the electromagnetic wave can be limited to a certain level. Propagating forward within the range, a planar waveguide structure similar to a dielectric-filled waveguide can be formed. It has the advantages of small size, light weight, convenient PCB processing, low processing cost, and easy integration with microwave and millimeter wave integrated circuits, and has been applied in the field of antennas. [0003] Due to the high quality factor of the traditio...

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Problems solved by technology

Although these methods can broaden the antenna bandwidth, they may lead to deterioration of the gain within the antenna bandwidth and cause some problems for feeding

[0004] In the paper "Wide-Bandwidth 60-GHz Aperture-Coupled Microstrip Patch Antennas (MPAs) Fed by Substrate Integrated Waveguide (SIW)" published by Wael M. Abdel-Wahab, a substrate-integrated waveguide-fed broadband slot-coupled patch is proposed The antenna increases the bandwidth of the antenna by using the substrate integrated waveguide feed and slot coupling, but the relative bandwidth of the antenna is only 24.1%, and the gain within the bandwidth is not stable enough

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