| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 92 === Two low-IF receiver RFICs and two T/R switches for 2.4 GHz wireless personal network applications have been designed in this thesis work. The first receiver front-end CMOS RFIC includes a low-noise amplifier and a down-mixer. The measured results showed power gain of 11.2 dB, input P1dB of —19.5 dBm, input IP3 of —15 dBm, noise figure of 8.2 dB, and LO-RF isolation greater than 47 dB, where the total DC power consumption is below 9.1 mW. The second single-chip receiver IC includes a low-noise amplifier, a down-mixer, an IF variable gain amplifier, a high-order low-pass filter and a buffer amplifier, which was implemented with TSMC 0.18um CMOS technology. The peak-voltage of baseband input I/Q signals was greater than 600 mV, which was sufficient to drive the following A/D converter. The simulated 66 dB gain tuning range was, adequate to cover the dynamic range of WPAN received RF signal. The entire chip consumed less than 12.7 mW DC power. For the T/R switches, SPDT and DPDT switches were designed with feedback inductions such that the measured isolation was larger than 31.5 dB and insertion loss was less than 1.4 dB.
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