Communications: radio wave antennas – Antennas – Body-attached or connected
Patent
1996-05-03
1999-03-23
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Body-attached or connected
343700MS, 343803, 343818, H01Q 138
Patent
active
058866698
ABSTRACT:
An antenna for use in a portable radio apparatus, which has a pair of bands extending from the main body of the apparatus, for securing the apparatus to a user. A first antenna conductor supplied with power and a second antenna conductor not supplied with power are embedded in each band and extend parallel to the axis of the band. The first and second antenna conductors embedded in the first band are connected at one end to the first and second antenna conductors embedded in the second band. No load is connected to the second antenna conductor embedded in each band. The second antenna conductor embedded in each band performs different functions according to its length. If it has a length equal to or greater than half the wavelength .lambda. of waves to receive, it will function as a reflector. If it has a length less than half the wavelength .lambda. of the waves, it will function as a director. The four antenna conductors are adjusted in length and position, constituting an antenna which has high sensitivity and which is small enough to be incorporated into a portable radio apparatus.
REFERENCES:
patent: 4754285 (1988-06-01), Robitaille
patent: 4827271 (1989-05-01), Berneking et al.
patent: 4922260 (1990-05-01), Gaskill et al.
patent: 5136303 (1992-08-01), Cho et al.
patent: 5243356 (1993-09-01), Hama
patent: 5317326 (1994-05-01), Tay et al.
patent: 5386214 (1995-01-01), Sugawara
patent: 5465098 (1995-11-01), Fujisawa et al.
Casio Computer Co. Ltd.
Wimer Michael C.
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