3com Corporation

Novartis Ag

Shaye Communications Limited

Stephen A Williams

Richard C Rogers

Andrew Knowles

Rodger J Andrew

Michael R Pye

Robert A Broad

Gordon F Maccabee

A receiver for a direct sequence spread spectrum signal subject to interference from a locally transmitted or received frequency-hopped spread spectrum signal includes a programmable notch filter which is controlled in accordance with the code sequence of a frequency-hopped signal to reject frequencies corresponding to those producing interference

Dual purpose spread spectrum radio receivers with controlled frequency rejection

Contact lens with moulded inversion mark

An antenna assembly comprises a printed circuit board having on one face various components and on the other face a ground plane, and a planar F suspended antenna comprising a conductive ground plane element having peripheral parts overlapping the edge of an aperture in the board a connecting element extending from the ground plane element through the aperture, a radiator element integral with the connecting element and extending generally parallel and within the area of the ground plane element, and an antenna feed element which extends from the radiating element though the aperture.

Antenna assembly

An antenna system for portable electronic apparatus, particularly for the handset of a cordless telephone system, and comprising two antenna, a first (shown) mounted on a flap (2) and comprising a groundplane 5 and active monopole 4 fed by a coaxial feed 6 from electronic circuitry (not shown) in the main section of the handset 1. The flap is pivotally connected to the main section of the housing 1, and is folded down against the main section when not in use. Another similar antenna is fitted in the main section, and both antennae are connected to the transceiver circuitry via the same node. The two antennae are specially designed so as to introduce deliberate mismatch so as to provide an effective switching system between the two antenna without the need for separate circuit elements.

High performance antenna for hand-held and portable equipment

Growing community of inventors

Southampton, United Kingdom

Stephen A Williams