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A CMOS low noise amplifier (LNA) with shunt feedback for RF front-end of 3-5 GHz OFDM ultra wideband (UWB) receiver was designed. The proposed LNA architecture with an additional source inductor was presented to improve its performance, the LNA has been simulated with TSMC 0.18μm standard RF CMOS process, and it has a noise figure of less than 1.9dB, power gain of 11dB at 4.3GHz at 1.8V power supply.
A frequency agile patch antenna utilizing a differential feeding scheme has been proposed for extending the tuning range of microstrip patch antennas. This feed can be readily integrated with differential RFICs and may find broad applications in mobile wireless devices. Measured results from a prototype show at least a 1.3:1 tuning range possible with the device, with much more expected if the varactor...
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