Air-Filled SIW Transmission Line and Phase Shifter For High Performances and Low-Cost U-Band Integrated Circuits and Systems
Résumé
A low-loss phase shifter made based on air-filled Substrate Integrated Waveguide (SIW) is proposed in this work. It is implemented on a low-cost multilayer printed circuit board (PCB) process. The top and bottom layers may make use of an extremely low-cost standard substrate such as FR-4 on which base-band or digital circuits can be designed so to obtain a very compact, high performance, low cost and self-packaged integrated system. For measurement purpose, an optimized-length U-band dielectric-to-air-filled SIW transition with 0.21 ±0.055 dB insertion loss is introduced. The insertion loss is also measured for an air-filled SIW at U-band with 0.122 ±0.122 dB for 1 cm long. Air-filled SIW phase shifter is designed, fabricated and measured for demonstration purpose. It achieves 0.22 ± 0.17 dB insertion loss in the operating band of interest. The proposed phase shifter is of particular interest for millimeter-wave low-noise systems.