To actualize a selector antenna system which satisfies necessary antenna characteristics, such as directivity, a half-value angle, a tilt angle and the like, by optionally setting the opening angles and corner lengths of reflectors.
A selector unit, consisting of an antenna element 3 and a reflector 2 and a selector unit consisting of an antenna element 3 and a reflector 2b are arranged annularly in turn and the needed position of the fan of the reflector 2b, is offset radially outward to make an opening angle α1 and corner length of the reflector 2a different from an opening angle α2 and a corner length of the reflector 2b. Namely, the needed positions of the fans of the reflectors are arranged outside to increase the opening angles of the reflectors according to the extent of outward offsetting and shorten the corner lengths, thereby making the total opening angle of the reflectors larger than 360°. Furthermore, circuit components accompanying the selector antenna are arranged in a space 4 formed by this arrangement.
MARUYAMA TAMAMI
SEKI TOSHIHIRO
NIPPON TELEGRAPH & TELEPHONE
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