Vertical Waveguide-to-Microstrip Self-Diplexing Transition for Dual-Band Applications

This letter presents a novel vertical waveguide-to-microstrip self-diplexing transition for dual-band applications. The is realized with standard printed circuit board (PCB) manufacturing processing, making it suitable mass production and practical A waveguide screwed on the topside of stack-up. Dual-band operation achieved by coupling two microstrips (one each band) to radiating patches through H-shaped slots. operating bandwidth has been enhanced adding parasitic above ones. Metalized via holes are used form cage around rectangular prevent power leakage. prototype fabricated operate at K/Ka frequency band. experimental results show −10 dB matching 20% 14% lower upper bands, respectively. Within these ranges, maximum measured insertion loss about 0.6 0.7 dB,