Motorola Corporation

Motorola Mobility LLC

John P Chenoweth

David H Minasi

Alejandro Candal

Lorenzo A Ponce De Leon

A wireless communications antenna system () includes a main circuit element () having a feed device () with an active port () and a grounding port (), where the grounding port is coupled to a grounding device () of the main circuit element, a generally planar antenna element () having a feeding portion () coupled to the active port of the feed device, where the antenna element is electrically ungrounded, and a generally planar secondary circuit element () having a grounding portion () coupled to the grounding device. The secondary circuit element is positioned in proximity to the antenna element and the antenna element and the secondary circuit element are generally parallel and separated by a gap (X). Further, at least a portion of the secondary circuit element at least partially overlaps the antenna element.

Low interference internal antenna system for wireless devices

A wideband antenna () includes a plurality of conductive strands () randomly interconnected and further coupled to a feedpoint () and a sheath () structurally retaining the plurality of conductive strands. The sheath can be a thin dielectric coating and the plurality of conductive strands can each be taller than one-quarter wavelength. The wideband antenna can have low dielectric losses while maintaining a multi-octave bandwidth. Air can be used as a dielectric between the plurality of conductive strands.

Wideband antenna with reduced dielectric loss

A multiband element antenna () used in combination with a unique metal chassis design that enhances antenna performance and that enables the design of a compact and efficient antenna system. A cellular flip phone () that has a conductive chassis includes a flip up antenna () that pivots between an extended and a retracted position. The antenna () pivots at a point that is located on one edge of the top of the cell phone body (). The conductive chassis of the flip cover () is grounded to the flip phone body () at a single point or single surface that is substantially opposite the antenna RF feed (). Conductive surfaces of the cellular flip phone body () are grounded at a single point that is near the antenna RF feed point (). This grounding arrangement has been found to control the flow of induced currents on the conductive portions of the flip cover () and body (), thereby improving the performance of the device's antenna ().

Antenna structure for devices with conductive chassis

A wireless communications device () includes a flip assemblythat includes a speaker () and that has a GPS antenna () mounted about a far edge. The flip assembly () further has a GPS RF amplifier () mounted adjacent to the GPS antenna () for amplifying signals received by the GPS antenna () and providing those amplified signals to a GPS RF stripline (). The GPS RF stripline () includes a flexible RF stripline () to accommodate rotationally opening and closing of the flip assembly (). Positioning of the GPS antenna () about the far edge of the flip assembly () removes the GPS antenna from a main housing assembly () of the wireless communications device () and provides for better GPS signal reception performance.

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Coral Springs, FL, United States of America

John P Chenoweth