Analysis and design of frequency tunable feedforward amplifier for PCS application

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references: p. 83-85.Issued also on microfiche from Lange Micrographics.Feedforward amplifiers are configurations used to reduce in-band third order Interrnodulation Distortion (IMD) products. A linear feedforward amplifier with channel tunability has been designed to operate in the Personal Communication Services (PCS) bandwidth. All the active and passive system's components were analyzed and integrated into a single microstrip module. The accurate use of the circuit simulator HP-EEsof Libra allowed the integration of the hybrid microstrip circuit using inexpensive components with a high level of precision. The results show a tuning range of 195 MHz with a 10 MHz bandwidth, providing an intennodulation cancellation of 60 dB below the main carrier when integrated with a class-A amplifier