By Topic

A 5.2 GHz CMOS I/Q Modulator With Integrated Phase Shifter for Beamforming

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Gueorguiev, S. ; Aalborg Univ., Aalborg ; Lindfors, S. ; Larsen, T.

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 linearly controlled 360deg 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 provided by a single current steering digital to analog converter by means of time multiplexed sample and hold circuits. The circuit, implemented in 0.25 mum CMOS technology, has a 1 dB output compression point of -7.1 dBm and consumes 61 mA. It has a phase shifting resolution of 10deg with a differential accuracy of 2deg.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:42 ,  Issue: 9 )