Title :
Effects of wire radius and arm bend on a rectangular spiral antenna
Author :
Nakano, Hisamatsu ; Yamauchi, Junji ; Nogami, K.
Author_Institution :
Hosei University, College of Engineering, Koganei, Japan
Abstract :
The input impedance of a rectangular spiral antenna is calculated as a function of wire radius. A value close to 60¿ ¿ is obtained when neighbouring filaments are spaced by nearly the equivalent strip width, although the spiral is not exactly self complementary. When the spiral arm is suitably bent the circularly polarised radiation pattern is widened in one principal plane, while maintaining the inherent input impedance and power gain.
Keywords :
antenna radiation patterns; antenna theory; electric impedance; antenna theory; arm bend; circularly polarised radiation pattern; equivalent strip width; input impedance; power gain; rectangular spiral antenna; wire radius;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830651
