|
|
Article: Ultralinear wireless amplifiers using low cost building blocks.(PA1124C and PA1125C linear power amplifiers from Phoenix Microwave)(Product Announcement)
- Article from:
- Microwave Journal
- Article date:
- April 1, 1999
CopyrightCOPYRIGHT 1999 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Linear power amplifiers (LPA) play a very important role in high performance wireless base stations. Modern multicarrier LPAs improve cell site performance and capacity significantly. Older base station equipment used single channels, each amplified individually using high power, nonlinear class-C amplifiers. The signals were improved by filtering the harmonic and spurious signals with expensive, bulky narrow-band filters. The various individual channels were then combined and fed to the system antenna for transmission.
Modern second- and third-generation digital base stations combine various channels in a wideband low power combiner and feed the multitone signal ...