Miniaturized 20 GHz CPW quadrature coupler using capacitive loading

✍ Scribed by R. Baliram Singh; T. M. Weller

• Book ID: 102517747
• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 175 KB
• Volume: 30
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.1203

✦ Synopsis

Abstract

This paper describes coplanar waveguide (CPW) quadrature couplers that utilize metal–insulator–metal (MIM) capacitors at each corner, eliminating the need for air bridges and significantly reducing the coupler footprint. A 20 GHz coupler on high‐resistivity silicon with branch lengths of 40° (660 μm) is presented—the area is 80% smaller than a conventional design. A measured insertion loss of ∼4.5±0.5 dB was achieved at 20 GHz. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 3–5, 2001.