Radio frequency LAN adapter card structure and method of manufacture
US5936584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1998 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/38
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio frequency (RF) local area network (LAN) adapter card for a personal computer conforms to the Personal Computer Memory Card International Association (PCMCIA) standard 2.0 (extended), providing a credit-card sized RF LAN communications terminal that plugs into the side of a personal computer, a laptop computer, a palmtop computer, and the like. The RF LAN adapter card includes a minimum height, broadband integrated antenna that provides a vertically polarized RF signal with good horizontal range. The combination of the antenna and its surrounding radome provide a high gain, omnidirectional radiation pattern that overcomes the parasitic distortions imposed by the close proximity of the personal computer housing. The adapter card housing includes internal RF shielding structures that shield the antenna from noise radiated by radio frequency signal circuits within the housing. A conductive adhesive coating is provided on the conductive layer of the ground plane of the antenna, for mechanically and electrically connecting the ground plane to the adapter card housing. This enables the antenna to be assembled to the housing at a later time after testing of the internal circuits in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.