Apparatus for multi-position antenna
US5572223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Sep 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/3833
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.