Design of an absorptive MMIC switch for satellite communication system

✍ Scribed by In-Bok Yom; Keun-Kwan Ryu; Dong-Hwan Shin; Jong-Heung Park; Moon-Que Lee

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 449 KB
• Volume: 46
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20989

✦ Synopsis

A monolithic microwave integrated circuit (MMIC) switch chip is developed using the InGaAs/GaAs p-HEMT process for the switch matrix of a satellite communication system. An absorptive MMIC switch is designed for good reflection-coefficient performances of the input and output ports at both on-and off-states. A quarter-wavelength impedance transformer is realized with the lumped elements of an MIM capacitor and a spiral inductor at 3 GHz band in order to reduce the chip size. The MMIC switch covers the frequency range 3.2-3.6 GHz. According to the on-wafer measurement, the fabricated MMIC switch with a miniature size of 1.6 ϫ 1.3 mm demonstrates insertion loss below 2 dB and isolation above 56.8 dB, and the measured performance agrees well with the simulation results.