LOOP ANTENNA WITH REFLECTOR

摘要

PROBLEM TO BE SOLVED: To provide a loop antenna in which back lobe can be suppressed effectively without increasing the reflector. SOLUTION: The loop antenna with a reflector comprises an annular section 12, a feeder line section 30 connected with the annular section 12, and a reflector 40 spaced apart from the annular section 12. The annular section 12 comprises a conical plane close to the reflector 40 on the inner circumferential side and receding from the reflector 40 toward the outer circumferential side. A part 13 turned up to the reflector side by 0.03-0.1λ(λis a target wavelength) is provided on the outer circumference of the annular section 12.