Abstract
Two SPDT switches that have low insertion loss with impedance-transformation networks are presented. The proposed SPDT switches are comprised of two shunt PINs and two quarter- wavelength microstrip lines together with impedance transformation networks, which canceled the capacitance efiect at ofi-state and the inductance efiect at on-state simultaneously. The simulated insertion loss performance is less than 0.3dB and the fabricated ones exhibit on-state low insertion loss of 0.5dB within the range of 4.6{4.8GHz.
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