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Design of Small-Size High-Power SPDT PIN Diode Switch with Defected Ground Structure for Wireless Broadband Internet Application  

Kim Dong-Wook (Department of Radio Science and Engineering, Chungnam National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.10, 2005 , pp. 1003-1009 More about this Journal
Abstract
In this paper, small-size high-power single pole double throw(SPDT) switch with defected pound structure(DGS) is presented for wireless broadband internet application. To reduce the circuit size using slow-wave characteristic, the DGS is applied to ${\lambda}/4$ transmission line of the switch and the measured results are compared with them of conventional switch. To secure high degree of isolation, the switch with the DGS is composed of shunt-connected PIN diodes and shows insertion loss of 0.8 dB and isolation more than 50 dB at 2.3 GHz. The size of the switch is reduced about $50\%$ only with the DGS patterns while it has very similar performance to the conventional shunt-type switch.
Keywords
Defected Ground Structure; PIN Diode; SPDT; Wireless Broadband Internet;
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