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An internally-matched single-pole double-throw (SPDT) switch with high isolation is presented. The high isolation is resulted from the leakage cancellation by employing a compensation circuit, which also achieves impedance match for all ports. The SPDT chip, implemented in a 0.18-m CMOS process, achieves a measured isolation of 72 dB, an insertion loss of 1.1 dB, return losses better than 10 dB at all ports and 1dB of 19.3 dBm at 1.9 GHz.

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