Antenna system

Abstract

PURPOSE: To obtain a small-sized UHF band TV antenna with high gain by using the 1st triangle dual loop antenna element as an exciting antenna element, and 2nd triangle double loop antenna element as a reflector, and plural dipole antenna elements as a wave director. CONSTITUTION: The 1st and 2nd triangle double loop antenna elements 1, 2 are arranged in parallel at a prescribed distance (do) in a direction at a right angle to the loop faces in a way that regular loop antenna elements 1a, 1b and 2a, 2b are opposed to each other. Further, plural dipole antenna elements 3, 4, 5 are arranged opposite to the 2nd triangle double loop antenna element 2 at distances d1, d2 and d3 as shown in figure from the 1st triangle double loop antenna element 1. A current flows to the 1st and 2nd triangle double loop antenna elements 1, 2 respectively in opposite phase and the super-gain effect is caused between the triangle double loop antenna elements 1, 2 whose distance (do) is kept narrow. COPYRIGHT: (C)1987,JPO&Japio

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Cited By (6)

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    EP-0825675-A2February 25, 1998EMC Test Systems, L.P.Antenne dipÔle avec élément formé à large bande
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    EP-1921564-A1May 14, 2008Hitachi, Ltd.Système et procédé de lecture d'étiquette RFID
    US-5790082-AAugust 04, 1998Podger; James StanleyDouble-delta log-periodic antenna
    US-5969687-AOctober 19, 1999Podger; James StanleyDouble-delta turnstile antenna
    US-7825810-B2November 02, 2010Hitachi, Ltd.RFID tag read system and method of reading RFID tag