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We have used silicon technologies to build highly dense phased array for X to W-band applications. Typical designs include an 8-element 8-16 GHz SiGe phased array receiver, a 16-element 30-50 GHz SiGe transmit phased array, a miniature (<; 3mm2) and low power (<;100 mW) CMOS phased array receiver at 24 GHz, and a 4-element SiGe/CMOS Tx/Rx phased array at 34-38 GHz with 5-bit amplitude and phase...
A K-band CMOS voltage-controlled oscillator (VCO) is implemented with a 0.18- ??m radio frequency CMOS process. For low supply voltage operation, a transformer-feedback topology using a transformer is proposed. The analysis of the transformer-feedback VCO is presented. This shows that the inductance ratio of the transformer must be optimized, and asymmetric-width transformers allow the easy optimization...
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