Design of planar matching loads for traveling-wave-fed SIW slot arrays

Abstract

This paper presents a novel planar matching load for travelingwave-fed substrate integrated waveguide (SIW) slot arrays. The load consists of a planar grounded coplanar waveguide (GCPW) matching load and a planar GCPW to SIW transition which makes the GCPW matching load compatible with the SIW. In the GCPW matching load a high frequency resistor is used to dissipate the remaining power. A traveling-wave-fed SIW slot array with the novel load is designed, fabricated and measured. The measurement results show the proposed planar matching load performs well over a wide band 24.2-26.0 GHz, and reflection coefficient and side lobe level (SLL) of the array is significantly reduced comparing with the array with no load. Keywords: matching load, traveling-wave-fed, SIW slot array, SIW Classification: Microwave and millimeter-wave devices, circuits, and modules References[1] M. M. Zhou, et al.: "Substrate integrated slot array antenna with required radiation pattern envelope," Int.

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