Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shuichiro Yamaguchi0
Hiromi Tokunaga0
Kazuhiro Eguchi0
Keisuke Maruyama0
Date of Patent
August 8, 2006
0Patent Application Number
110617280
Date Filed
February 22, 2005
0Patent Primary Examiner
Patent abstract
This invention provides an antenna module comprising: a helical antenna 1 including a base 2 and a pair of terminals 4, 5 and a helical area formed on the base 2; a power supply 7 for supplying power to one of the pair of terminals 4, 5 of the helical antenna 1; an opening connected to the other of the pair of terminals; an antenna substrate 9 on which the antenna 7 is mounted; a grounding area 10 formed in the vicinity of the power supply 7; and a peripheral conductor 16 formed at least a portion on the periphery of the antenna substrate 9, wherein the peripheral length of the peripheral conductor 16 formed on the periphery of the antenna substrate 9 is nearly integer times as long as ¼ wavelength of a resonance frequency.
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