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

140-MHz IF Main Amplifiers for 2700-Channel Microwave Repeaters

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)
Watanabe, T. ; Nippon Telegraph and Telephone, Tokyo, Japan ; Kurokawa, T.

A gain controlled amplifier capable of transmitting 2700 channels is presented. In the 2700-channel radio relay system, the intermediate frequency (IF) was selected at 140 MHz. An IF main amplifier was required to handle approximately +14 dBm and to realize low distortion-gain control circuits. Conventional variolossers using semiconductor devices induce many harmonics and amplitude modulation-phase modulation (AM-PM) conversion, which relate to transmission distortion. This paper describes design objectives, a technique to reduce the aforementioned defects, and measured characteristics of the amplifier. Field tests of microwave repeaters using these amplifiers proved their utility.

Published in:

Communication Technology, IEEE Transactions on  (Volume:18 ,  Issue: 5 )

Date of Publication:

October 1970

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.