Cart (Loading....) | Create Account
Close category search window

Band-Split Forward-Path Cartesian Feedback for Multicarrier TETRA RF Power Amplifiers

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

2 Author(s)
Hoyerby, M. ; Motorola Copenhagen, Glostrup, Denmark ; Hansen, N.L.

This paper demonstrates a TETRA base-station RF power amplifier (RFPA) with state-of-the-art linearity and noise performance for the UHF band. Very high linearity is achieved at considerable power levels using a combination of a linear class-A/B RFPA, a novel dual-path Cartesian-feedback structure with RF reference injection, and high-order loop filters. It is demonstrated how the limitation on linearization bandwidth imposed by RFPA group delay can be alleviated by the introduction of an auxiliary low-power RFPA to the system. A 10-MHz (baseband) bandwidth loop is closed around a 200-W LDMOS RFPA with 20-ns group delay. Basic small-signal and noise/distortion analysis of the adopted approach is presented. Experimental validation of the approach is done with a noncontiguous dual-carrier TETRA signal with 25-500-kHz carrier spacing. Intermodulation performance in the -80-dBc area is demonstrated along with a linearization system noise floor of -130 to -110 dBc, all achieved from a +45- to +46-dBm RF output power level with 23-27% LDMOS RFPA drain efficiency.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:59 ,  Issue: 4 )

Date of Publication:

April 2011

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.