DocumentCode
1013287
Title
On the use of active coupling networks with electrically small receiving antennas
Author
Bahr, A.J.
Author_Institution
Remote Measurements Laboratory, SRI International, Menlo Park, CA, USA
Volume
25
Issue
6
fYear
1977
fDate
11/1/1977 12:00:00 AM
Firstpage
841
Lastpage
845
Abstract
An analysis of the noise performance of an active receiving antenna system consisting of an antenna, active coupling network, and high-gain preamplifier is described. It is shown how this noise performance can be described by circular loci in the output-impedance plane of the coupling network. These loci are not restricted to the right-half plane. A coupling network having an output impedance in the left-half plane was built using a negative-impedance converter (NIC), and experimental results obtained by using this circuit in conjunction with a short monopole are presented.
Keywords
Active antennas; Antenna noise; Coupling circuits; Immittance converters; Active circuits; Active noise reduction; Bandwidth; Circuit noise; Coupling circuits; Impedance; Noise figure; Preamplifiers; Receiving antennas; Temperature;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.1977.1141709
Filename
1141709
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