Patent ID: 8994598
Filing Date: 2015-03-31
Classification: H01Q

Abstract:
1. A circularly polarized wave reception antenna comprising: a loop antenna having two feed terminals; a parasitic element positioned near and outside the loop antenna and comprised of a conductor independent of an antenna conductor of the loop antenna; and a closed loop conductor having no feed terminal positioned to surround a vicinity of the loop antenna and the parasitic element, and positioned to increase a gain of the loop antenna having the two feed terminals, wherein the loop antenna, the parasitic element, and the closed loop conductor are formed in a same plane, and wherein the total circumference of the closed loop conductor is 2.7 to 3.3 times the total circumference of the loop antenna, the closed loop conductor is rectangular, and a ratio of two adjacent sides of the rectangular closed loop conductor is in a range of 1:2 to 2:1.