Simple, compact and broadband right-angle transition betweensubstrate integrated waveguide and rectangular waveguide atKa-band

摘要

In this article, a simple compact broadband right-angle transition between substrateintegrated waveguide (SIW) and rectangular waveguide (RWG) working at Ka-bandis proposed. Three coupling slots etched on the interface are developed to couple theelectromagnetic field from SIW to RWG. A metallic via is introduced into the endslot to enhance the inductance and all the slots are developed in different dimensionsfor multi-resonance. By proper optimizing, three resonances are obtained whichbroadens the impedance matching effectively. All details of the transition aredesigned on the SIW part for the purpose of simple and compact. Two back-to-backprototypes working at Ka-band are designed, fabricated and measured. The measuredresults show that the mean value of insertion loss for a single transition is about 0.51dB and the return loss is better than 15 dB over the full Ka-band. The proposedright-angle transition has advantages of simple assembly, compact size and broadbandcharacteristics and it can be a good candidate for millimeter-wave applications.