Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1992-07-01
1994-09-13
Hajec, Donald
Communications: radio wave antennas
Antennas
Spiral or helical type
343860, H01Q 1108, H01Q 136
Patent
active
053463005
ABSTRACT:
A first radiation member 165 includes radiation conductors 166 and 167, an arm 168 and a lower connection piece 169 all integrally formed by blanking. A stub 170 is likewise integrally formed on radiation conductor 166. A second radiation member 171 includes radiation conductors 172 and 173, an arm 174 and a lower connection piece 175 all integrally formed by blanking. A stub 176 is likewise integrally formed on radiation conductor 173. A first loop comprised of radiation conductors 167 and 172, arms 168 and 174 and lower connection pieces 169 and 175 exhibits capacitive impedance at a wavelength for use. The overall length of a second loop comprised of radiation conductors 166 and 173, arms 168 and 174 and lower connection pieces 169 and 175 is set equal to that of the first loop. The second loop, however, exhibits inductive impedance at the wavelength for use by adjustment of the length of stubs 170 and 176. Adjusting stubs 170 and 176 enable control of a phase of a current flowing through the second loop.
REFERENCES:
patent: 2945227 (1960-07-01), Broussaud
patent: 3419875 (1968-12-01), Aasted
patent: 4008479 (1977-02-01), Smith
patent: 4114164 (1978-09-01), Greiser
patent: 4658262 (1987-04-01), DuHamel
patent: 5170176 (1992-12-01), Yasunaga et al.
Patent Abstracts Of Japan, vol. 012, No. 234 (E-629) Jul. 5, 1988 & JP-A-63 026004 (Sony Corp.) Feb. 3, 1988.
Higashi Keijirou
Nakano Hiroshi
Ohta Tomozo
Takebe Hiroyuki
Yamamoto Hirohiko
Hajec Donald
Le Hoang-anh
Sharp Kabushiki Kaisha
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