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Broadband Microwave SPDT Switch Using CPW Impedance Transform Network  

Lee Kang Ho (Dept. of Electronics Eng., University of Incheon)
Park Hyung Moo (Dept. of Electronics Eng., Dongguk University)
Rhee Jin Koo (Dept. of Electronics Eng., Dongguk University)
Koo Kyung Heon (Dept. of Electronics Eng., University of Incheon)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.7, 2005 , pp. 57-62 More about this Journal
Abstract
This paper describes the design of a high performance microwave single pole double throw (SPDT) monolithic microwave integrated circuit switch using GaAs pHEMT process. The switch design proposes a novel coplanar waveguide (CPW) impedance transform network which results in the low insertion loss and high isolation by compensating for the FET parasitics to get the low on-resistance and low off-capacitance. The proposed switch has the measured isolation of better than 24 dB and insertion loss of less than 2.6 dB from 53 to 61 GHz. The chip is fabricated with the size of 2.2mm $\times$ 1.6 mm.
Keywords
SPDT; CPW; pHEMT; switch; MMIC;
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