HIGH-FREQUENCY ANTENNA TECHNIQUES
Abstract
INVESTIGATIONS WERE MADE OF THE PROPERTIES OF WIRE-SLOT ANTENNAS OVER GROUND PLANES. Single, double, and quadruple wire-slot antennas were tested for resonant frequency, relative gain, pattern bandwidth, and impedance bandwidth. Input impedances were raised to 50 ohms by folding (for example, the folded dipole). Two techniques were developed: (1) a backscattermeasuring technique for detecting the resonant frequency of a rectangular loop and comparing its reflection with a dipole, and (2) an underground antenna technique where a wire-slot antenna radiates from a shallow trough. Preliminary measurements of skeleton slots of differing length/width ratios indicate an optimum ratio of 3 to 1 with respect to gain. The rule that makes the over-all length one wavelength applied closely for long, thin slots but may be 10% off resonance for square slots. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1961
- Accession Number
- AD0271647
Entities
People
- John F. Ramsay