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

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.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE