TWO-FREQUENCY COMMON ANTENNA, MULTIFREQUENCY COMMON ANTENNA, AND TWO-FREQUENCY AND MULTIFREQUENCY COMMON ARRAY ANTENNA

摘要

PROBLEM TO BE SOLVED: To solve such a problem that a similar beam shape can not be obtained in the operation at a different operating frequency since it is difficult to control the beam widths of individual operating frequencies of a two- frequency common array antenna. SOLUTION: The two-frequency common antenna is equipped with feeders 7a and 7b printed on the top and reverse surfaces of a dielectric substrate 1, internal radiation elements 2a and 2b connected to the feeders 7a and 7b, external radiation elements 3a and 3b, and inductors 4a and 4b which connect both the internal radiation elements 2a and 2b and external radiation elements 3a and 3b with gaps 6a and 6b between both the radiation elements.