Title:
HELICAL ANTENNA
Document Type and Number:
Japanese Patent JP2014120831
Kind Code:
A
Abstract:
To provide a helical antenna 1 which can achieve compaction, wideband, and stabilization of impedance.
A helical antenna 1 is ground type and operates in composite mode where series resonance mode and parallel resonance mode occur simultaneously. The helical antenna 1 has a length of 1/4-2 times of the wavelength λ of carrier, a diameter D of 1/2069-1 times of the wavelength λ, an axial length h of 1/857-1 times of the wavelength λ, and a pitch p of 1/6667-1/6000 times of the wavelength λ.
Inventors:
KANEKO RYOHEI
HIRASAWA HIROSHI
KAJIYAMA KOJI
HAMADA MASATOSHI
HIRASAWA HIROSHI
KAJIYAMA KOJI
HAMADA MASATOSHI
Application Number:
JP2012272955A
Publication Date:
June 30, 2014
Filing Date:
December 14, 2012
Export Citation:
Assignee:
JAPAN BROADCASTING CORP
International Classes:
H01Q9/42; H01Q9/06; H01Q11/08
Domestic Patent References:
| JP2005522134A | 2005-07-21 | |||
| JPH0521536U | 1993-03-19 |
Attorney, Agent or Firm:
Isono International Patent and Trademark Office
Isono Dozo
Etsuo Tada
Isono Dozo
Etsuo Tada
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