Motorola Corporation

Guan Hong Ng

Yew Siow Tay

Yu Chee Tan

Kok Kiong Tang

An antenna radiator assembly () and radio communications assembly () comprising a circuit board () supporting electrical conductors (), one of the electrical conductors () being coupled to a feed point (), and the circuit board () having a ground plane () formed from at least one conductive sheet. There is a tuning plate (), a parasitic tuning line (), a switching unit () selectively electrically coupling the tuning plate () to the tuning line (). There is also an antenna radiator element () spaced from the circuit board () and coupled to the feed point (), and when viewed in plan view there is an overlapping area where an overlapping surface area of the antenna radiator element () overlaps an overlapping surface area of the circuit board () thereby forming a sandwiched dielectric region therebetween, the sandwiched dielectric region providing capacitive coupling of the tuning plate () and the antenna radiator element (); and a ground connector () inductively coupling the antenna radiator element () to the ground plane (), wherein the tuning plate () is disposed in the overlapping surface area of the circuit board ().

Communications assembly and antenna assembly with a switched tuning line

A circuit assembly () and electronic device () having a printed circuit board (), with conductive runners () and a ground plane (). There is electronic circuitry () mounted to the circuit board () and electrically coupled to the runners (). The circuit assembly () also has a Liquid Crystal Display () electrically coupled to the electronic circuitry (), and a monopole element () is mounted on a surface of the Liquid Crystal Display () by a dielectric mount () that is proximal to an edge () of the printed circuit board ().

Circuit assembly and electronic device incorporating such an assembly

A radio communications device () having an antenna radiator assembly () has radio frequency communications circuitry (), a ground plane (), a radio frequency radiator element () and connectors each physically contacting the radio frequency radiator element () at contact points. A feed point () formed by one of the connectors couples the radio frequency radiator element () to the radio frequency communications circuitry (). Grounds links () formed the connectors selectively couple the radio frequency radiator element () to the ground plane () via a switching unit (). When operating in a specific frequency band during a transmit mode, the switching unit () selects one the connectors to provide a transmit frequency sub-band, and when operating in the specific frequency band during a receive mode, the switching unit selects another of the connectors to provide a receive frequency sub-band.

Antenna radiator assembly and radio communications device

A portable radio telephone ( ) with improved antenna radiation efficiency. The radio telephone ( ) has an antenna ( ) asymmetrical about a feedpoint ( ). A two part housing ( ) partially encloses the antenna ( ) and an electrically conductive surface provides a reflector ( ) for antenna ( ), the reflector ( ) having a length that is at least half a wavelength of an intended lowest operating frequency of the radio telephone ( ).

Growing community of inventors

Singapore, Singapore

Guan Hong Ng