Title :
Influence of VSWR of radiation elements on sidelobe degradation of low sidelobe array antennas
Author :
Kijima, M. ; Yamada, Y.
Author_Institution :
NTT Mobile Communications Network Inc., Yokosuka-shi, Kanagawa, Japan
fDate :
June 28 1993-July 2 1993
Abstract :
The influence of the VSWR (voltage standing wave ratio) of radiation elements on the sidelobe degradation of low-sidelobe array antennas is analyzed by deriving straightforward expressions. It is found that the relationship between VSWR and sidelobe level can be expressed with simple equations which depend only on reflection levels at elements and excitation phase differences. These equations can be used to determine the maximum VSWR that can be tolerated to achieve a specified level of sidelobe degradation. One result was that /spl Gamma//sub o/ must be smaller than -18dB if the sidelobes are to be suppressed to the level of -20dB.<>
Keywords :
antenna arrays; antenna radiation patterns; directive antennas; impedance matching; tolerance analysis; VSWR; excitation phase differences; low sidelobe array antennas; reflection levels; sidelobe degradation; voltage standing wave ratio; Antenna arrays; Artificial intelligence; Base stations; Circuits; Degradation; Frequency; Mobile antennas; Mobile communication; Optical reflection; Resistors;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385241
