Title :
Resonance phenomena on Yagi arrays
Author :
Tranquilla, J.M. ; Balmain, K.G.
Author_Institution :
Dept. of Electrical Engng., Univ. of New Brunswick, Fredericton, NB, Canada
fDate :
4/1/1981 12:00:00 AM
Abstract :
The Yagi antenna has been studied experimentally and theoretically and a class of resonance phenomena has been found to occur in a narrow frequency range immediately below the director array cutoff frequency. This resonant behaviour is characterized in the swept-frequency far-field graphs by a very narrowband reduction in gain and in the input impedance by very rapid fluctuations with frequency. The dispersion characteristics of arrays of dipole elements are used to suggest a design procedure which prevents the occurrence of such resonances.
Keywords :
antenna arrays; antenna theory; directive antennas; Yagi antenna; Yagi arrays; design procedure preventing resonance; dispersion characteristics; input impedance; narrow frequency range; narrowband reduction in gain; rapid fluctuations with frequency; resonance phenomena; Cutoff frequency; Dipole antennas; Dispersion; Educational institutions; Gain; Impedance; Resonant frequency;
Journal_Title :
Electrical Engineering Journal, Canadian
DOI :
10.1109/CEEJ.1981.6590828
