At millimetre-wave frequencies, the discrepancy between simulation and measurement comes from the relative permittivity tolerance and fabrication tolerance. This discrepancy can mainly cause resonant frequency shift. A tunable waveguide-to-microstrip transition for the W-band antenna is proposed to overcome this discrepancy. A typical transition consists of a microstrip probe on a substrate and a waveguide back short in a fixed structure. The tunability has been designed by making a movable back short through WR-10 waveguide. This design can change the back-short distance mechanically to tune resonant frequency. The tunability of this design has been verified with a W-band substrate integrated waveguide (SIW) slot array radar antenna.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering