Accession Number:
ADA045728
Title:
Active Network Techniques for Improving Antenna Performance
Descriptive Note:
Final rept. 26 May 1975-25 May 1977
Corporate Author:
SRI INTERNATIONAL MENLO PARK CA
Personal Author(s):
Report Date:
1977-09-12
Pagination or Media Count:
17.0
Abstract:
This study was concerned with improving the performance of electrically small antennas through the use of active-network techniques. Only antennas for the range 30-80 MHz were considered, and means were sought for reducing the noise figure of a receiving system employing such an antenna. Two types of active coupling networks were studied negative-immittance converters NIC, and feedback amplifiers. The results obtained show that an FET with feedback appears useful, whereas a NIC is impractical because of its excessive noise and its high sensitivity to changes in circuit and bias parameters.
Descriptors:
Subject Categories:
- Electrical and Electronic Equipment