Apparatus for multi-position antenna

Details Apparatus for multi-position antenna Apparatus for multi-position antenna

1994-09-16

1996-11-05

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343725, 343726, 343833, H01Q 124

Patent

active

055722237

ABSTRACT:
A multi-position antenna apparatus is provided for a device including a first housing portion and a second housing portion which are interconnected such that they move relative to one another between a collapsed position and an extended position. The device includes radio circuitry positioned in the first housing portion. The antenna apparatus includes a first antenna supported in the second housing portion. The first antenna is coupled to the radio circuitry in the extended position and in the collapsed position. A parasitic radiator is supported in the first housing portion and is only coupled to the first antenna when the housing is in the collapsed position. The parasitic radiator is a quarter wavelength of the signaling frequency or an integer multiple thereof. The parasitic radiator may include a member inductively or capacitively coupled to the first antenna when the flap is closed. Alternatively, the parasitic radiator may be a patch radiator or a loop conductor. An end of the parasitic radiator may be connected to ground.

REFERENCES:
patent: 5337061 (1994-08-01), Pye et al.

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