The design of an active loop antenna by optimization
Abstract
The problem of antenna loop design is examined for the case in which substantial loop inductance necessitates the use of a matching network to optimize the signal-to-noise ratio. The matching network between the antenna and the amplifier is closely integrated into the system and is studied at 160-320 MHz. The computer modeling and optimization procedures are given for the components based on the optimal minimum detectable signal (MDS) performance. The design consists of two electrically isolated crossed half-loops on a ground plane with the feed-point connections that loop over each other. An 8-10-dB MDS improvement is noted over an octave frequency range with the optimized matching network as opposed to a direct amplifier/antenna connection. The optimized MDS is flat with frequency due to the optimization method which minimizes the peak value of the function measured over the frequency range.
- Publication:
-
Microwave Journal
- Pub Date:
- February 1992
- Bibcode:
- 1992MiJo...35...84H
- Keywords:
-
- Equivalent Circuits;
- Loop Antennas;
- Microwave Amplifiers;
- Transmission Lines;
- Magnetic Coils;
- Network Analysis;
- Communications and Radar