Motorola Corporation

Kok Kiong Tang

Yu Chee Tan

Yew Siow Tay

Guan Hong Ng

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 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.

Growing community of inventors

Singapore, Singapore

Kok Kiong Tang