| Summary: | 碩士 === 國立中央大學 === 通訊工程研究所 === 92 === Due to internet is getting to go deep into households and multi-media services are getting popular, consumption market is demanding much fast internet speed. RF circuit design is one of the key technologies of the wireless communication systems. Low noise amplifiers, mixers, power amplifiers and voltage-controlled oscillators are key components. This field is a very promising research theme.
RF front-end integrated circuit design is the main research point of this paper, which apply to ISM band wireless local area network and Ka band local multipoint distribution service. Among above, ISM band circuit is implemented with TSMC 0.35μm SiGe HBT and GCT 2.0μm GaAs HBT processes, including variable gain low noise amplifier, sub-harmonic mixer, linear power amplifier and voltage-controlled oscillator designs; while Ka band circuit is implemented with WIN 0.15μm pHEMT , comprising low noise amplifier, sub-harmonic mixer, driver amplifier and power amplifier designs.
The measurement results of the ISM band circuit are as follows; for the variable gain LNA , gain is 19 dB, input power at the 1-dB gain compression point is -23 dBm, noise figure is 2.7dB, gain control range is 7.2 dB; for the sub-harmonic mixer, conversion gain is 2.9dB, input power at the 1-dB gain compression point is -7.4 dBm, signal isolation is greater than 30dB; for the linear power amplifier , gain is 18.3 dB, output power at the 1-dB gain impression point is 23.2dBm, power added efficiency is 29.6%; for the voltage-controlled oscillator , phase noise is -90.9 dBc/Hz, output power is -7 dBm, tuning range is 635 MHz .
The measurement results of the Ka band circuit are as follows; for the LNA , gain is 24.8 dB, input power at the 1-dB gain compression point is -20 dBm, noise figure is 3.1 dB; for the sub-harmonic mixer, conversion loss is 10.5 dB, input power at the 1-dB gain compression point is 9 dBm, signal isolation is greater than 30dB; for the driver amplifier , gain is 20.4 dB, output power at the 1-dB gain impression point is 17 dBm, power added efficiency is 29.4%; for the power amplifier , gain is 24.4 dB, output power at the 1-dB gain impression point is 20.9 dBm, power added efficiency is 20.8%.
|
|---|
