| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 89 === This thesis presents design, implementation, and extensive measurement of a 5.7 GHz two-stage HBT MMIC power amplifier (PA) and 5.7GHz UNII (Unlicensed National Information Infrastructure) band transmitter and receiver RF front-end modules for IEEE 802.11a WLAN application. The design goal of the PA is to have 20dB gain and 20dBm 1-dB compression point at 3.6V DC bias. The measurement is performed on a FR-4 test fixture. The post simulation, including the effects of test fixture and bond-wire, agrees well with measurement. For the 5.7 GHz RF modules, RF is from 5.725~5.825GHz, LO is from 5.445~ 5.545GHz, and IF is at 280MHz. The Tx and Rx RF modules are all implemented on FR-4 substrate. The receiver has 31dB conversion gain, 4.7dB noise figure and the transmitter has 50dB conversion gain, 1 dB compression point at 25.3dBm and 34dBm OIP3. By using the Digital Audio Broadcasting (DAB) system to simulate the IEEE 802.11a OFDM signal transmission test, the sensitivity of the receiving RF module is about -93dBm(@BER=10-4) and -100dBm(@BER=10-2). The ACPR of the transmitter RF module is about -31.4dBc (@16dBm) and -22.1dBc(@19.3dBm)。
|
|---|
