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An integrated 6.2-9.5GHz CMOS UWB receiver for WiMedia MB-OFDM is proposed. The fully differential receiver consists of a wideband LNA and a down conversion mixer with high and low gain mode. A low-pass filter and a programmable gain amplifier are also included. The chip was fabricated in TSMC 0.13-μm RF CMOS process. Measurement results show that the receiver achieves voltage gain from 21dB to 63dB...
A 77-GHz double-balanced mixer in a 200 GHz ft silicon-germanium technology is presented. The proposed mixer architecture is capable of simultaneous direct up- and down-conversion of two separate input signals without additional power consumption. An up-converted low-frequency test signal is coupled back into the receiver RF input path to enable a built-in functionality test of the down-conversion...
Weather forecasting, hurricane tracking and atmospheric science applications depend on humidity sounding of atmosphere. Current instruments provide these measurements from ground based, airborne and LEO satellites by measuring radiometric temperature on the flanks of the 183 GHz water vapor line. We have developed miniature low noise receivers that will enable these measurements from a geostationary...
This article presents a UWB receiver, which is made by the chips designed by our group in SMIC0.18 um process, This receiver was verified by the measurement, With the help of FPGA it can synthesis 2.8G~3.98 GHz LO frequency by changing the PLL and reference frequency, with reference frequency 21 MHz, division ratio 1/160, it can be locked at 3.36 GHz with the phase noise of -83 dBc/Hz, the internal...
This paper develops a technique, using a built-in detector, for measuring the specifications of RF subsystems and fine-tuning them with a feedback control algorithm. At the same time, optimum power consumption points can be chosen from different biasing schemes. The detector has small area overhead with low frequency output. The sampled output waveform is analyzed using an FFT. The low frequency measurements...
The development in the field of RF and baseband (BB) integration in nanoscale CMOS technology for cellular systems over the last recent years has shown significant progress. The successful integration of the RF transceiver with digital baseband processor enables mobile phone manufacturer to build ultra-low cost phones for GSM/GPRS in CMOS technology. This trend towards continuous system integration...
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