Directional enhancement/range extending devices

Details Directional enhancement/range extending devices Directional enhancement/range extending devices

2007-03-13

2007-03-13

Wimer, Michael C. (Department: 2821)

Communications: radio wave antennas

Antennas

Antenna with parasitic reflector

C343S702000

Reexamination Certificate

active

10631121

ABSTRACT:
An accessory is provided for use with an existing antenna on a wireless device to improve directionality and/or signal strength. The accessory includes a conductive surface that is coupled to the existing antenna using a clip disposed on an arm that supports the reflector. The conductive surface is disposed at a quarter wavelength spacing from the existing antenna. Alternatively, the reflective surface may be made sufficiently large to reflect received wireless signals in regard to a plurality of existing antennas that are spaced apart, e.g., internal and external antennas. The reflector can optionally be curved to achieve a desired directional characteristic for the wireless signals reflected by the accessory. Also, a director can be included on the accessory to provide improved gain and directionality for the wireless signals, relative to the existing antenna system.

REFERENCES:
patent: 3742513 (1973-06-01), Ehrenspeck
patent: 5539419 (1996-07-01), Ogawa et al.
patent: 6208300 (2001-03-01), Johnson
patent: 6816120 (2004-11-01), Kuramoto
D-Link Systems, Inc. 2002. “Enhanced 2.4GHz (802.11b) Wireless Range Extender.” 3pp. Available http://www.dlink.com/products/wireless/dw1800ap+/.
Foxlink/Microlink. 2003. “Wireless LAN Product Line Product Requirements Document (PRD)—Specification for IEEE802.11b/g Wireless LAN Radio Repeater.” 21pp. MLPRD802.11b-g WLAN RF Repeater 04-04-03.DOC.

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