← 返回 JSSC 论文列表JSSC 2007第9期RF & Wireless0.25μmPhased Array
A 5.2 GHz CMOS I/Q Modulator With Integrated Phase Shifter for Beamforming Svetoslav Gueorguiev, Saska Lindfors, and
一款用于波束形成的52 GHz CMOS IQ调制器，集成相位偏移器，适用于802.11a WLAN。
0.25μm CMOS, 1 dB输出压缩点-7.1 dBm, 功耗61 mA, 相位偏移分辨率10度
CMOSIQ调制器波束形成相位偏移器802.11a WLAN
▸线性控制的360度相位偏移范围
▸电流复用技术实现高效矢量调制器
▸时间复用采样保持电路提供控制电流
Abstract
This paper presents the design of an I/Q modulator with integrated phase shifter for beamforming. It is targeted at 802.11a WLAN. An efficient beamforming architecture with a lin- early controlled 360 phase shifting range is proposed for linear transmitters. The phase shifting takes place in the local oscillator path at three times lower frequency than the carrier. The phase shifters are implemented as vector modulators in an efficient way by utilizing a current reuse technique. All control currents are pro- vided by a single current steering digital to analog converter by means of time multiplexed sample and hold circuits. The circuit, implemented in 0.25 m CMOS technology, has a 1 dB output com- pression point of 7.1 dBm and consumes 61 mA. It has a phase shifting resolution of 10 with a differential accuracy of 2 .