An experimental prototype transmitter suitable for 802.11 a applications and employing a stagger-tuned filter consisting of two Q-enhanced resonators has been integrated in a 0.18-mum CMOS technology. The transmitter provides spectral mask and error vector magnitude (EVM) compliant output power of -8.26 dBm for a 64 QAM OFDM symbol coded for 54 Mb/s data rate. The integrated Q-enhanced filter is centered at 5.125 GHz with 200-MHz bandwidth and 0.8-dB ripple. The transmitter signal path dissipates 190 mW from a 1.8-V power supply, of which the filter dissipates 41 mW.58 Figure 4. 16: Bandwidth reduction in a stagger-tuned filter. 58 Figure 4.17: Bandwidth reduction in a stagger-tuned filter. 59 Figure 5.1: Wireless transmitter architecture for the experimental prototype 62 Figure 5.2: Simplified schematic of theanbsp;...
|Title||:||Tunable Bandpass RF Filters for CMOS Wireless Transmitters|
|Publisher||:||ProQuest - 2008|