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Two types of broadband end-fire antennas are developed for sectorized coverage of 60-GHz wireless personal area networks (WPAN) applications. The first one is an integrated horn antenna in RO4000 laminates. Using the combination of through-, blind-, and buried-vias, a horn structure with both E- and H-plane flares can be mapped into a multilayer laminated substrate. A simple integrated coplanar feeding...
A time-interleaved pipeline ADC is designed with the reconfigurable resolution and sampling rate, Fs, to accommodate different operation scenarios. The main offset and gain mismatches between four sub-ADCs are modulated to the frequency of F/2 by the reference-and opamp-sharing techniques. Fabricated in 90 nm CMOS, the 7 bit ADC has an ENOB of 6.5 at 1.1 GHz sampling rate. The I/Q ADCs totally consume...
A direct-conversion RF transceiver and digital PHY are integrated in a single 0.13mum digital CMOS chip. Designed for UWB OFDM operation as proposed by the WiMedia Alliance, the device supports both fixed and frequency-hopped modes in the band of 3.1 to 4.8GHz. The RF transceiver draws 100mA in receive mode and 70mA in transmit mode, and the complete chip occupies 17mm2
A direct-conversion UWB transceiver for mode 1 OFDM applications employs three resonant networks and three PLLs. Designed in a 0.13 /spl mu/m CMOS technology, the transceiver provides a total gain in the range of 69 to 73 dB, an NF in the range of 5.5 to 8.4 dB across three bands, and a TX P/sub 1dB/ of -10 dBm. The circuit consumes 105 mW from a 1.5 V supply.
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