Tyco Electronics Logistics Ag

Rangestar Wireless, Inc.

Thomas Trumbull

Robert J Hill

Patrick Daniel McKivergan

Peter Fine

Eduardo Lopez

John E Harris

Dick Kuck

An antenna for wireless communication devices provides resonance over at least two frequency bands with a directional radiation pattern and reduced specific absorption rate (SAR). The antenna structure includes of a formed conducting plate resonator spaced from a larger substantially rectangular ground plane conductor. The antenna structure can be located near one end of ground plane conductor. Single feed and ground connections are provided on adjacent edges of the resonator. Two or more tuning capacitors cause the resonator to resonate over two or more frequency ranges. Tuning of the higher frequency band may be done without affecting the lower frequency band in the case of a dual band version. The sizes and shape of the resonator and ground plane are compatible with the dimensions of wireless communications devices such as cell phones. The resonator may be conveniently installed internally at the top rear of a wireless communications device, providing substantial front to back ratio in the antenna radiation pattern, reducing the specific absorption rate (SAR) for devices, such as cell phones positioned close to a user's head or body when in use.

Multi-band compact tunable directional antenna for wireless communication devices

The invention discloses a slot antenna having a pair of orthogonally oriented front and rear reflector panels. In one embodiment, the antenna assembly includes first and second front panels oriented approximately orthogonally to each other, said first and second front panels being coupled together and having a substantially elongate slot defined upon at least a portion of each of the first and second front panels, and first and second rear reflector panels oriented approximately orthogonally to each other, and disposed proximate the first and second front panels, and a feed terminal coupled to one of the first or second front panels, said feed terminal being coupled to an input/output RF connection point. The slot antenna according to the present invention may be disposed within an associated wireless communications device relative to a ground plane element of a printed wiring board, or may be disposed separately away from the associated wireless communications device.

Multiple band antenna having isolated feeds

The present invention discloses a novel PIFA-edge antenna and diversity antenna system operable over a wide range of conditions and exhibiting superior performance as part of a wireless LAN environment. The antenna of the present invention provides reliable and consistent omnidirectional performance while reducing the deleterious effects of multipath propagation interference which is often present in office environments having a variety of surfaces that passively reflect a broad range of frequencies useful within the broad spectrum the electromagnetic radiation (e.g., radio frequency or &ldquo;RF&rdquo;) for transmitting analog or digital voice, data, images, and the like (herein &ldquo;data&rdquo;) typically transmitted across the typical LAN.

Polarization and spatial diversity antenna assembly for wireless communication devices

A dual frequency wideband antenna assembly for use in a wireless communication device. The antenna assembly having a first resonator element disposed away from the ground plane element, said first resonator element being operatively coupled at a first location to the ground plane and being operatively coupled at a second location to the RF signal port; a second resonator element disposed away from the ground plane. The first and second resonator elements are coupled via a bridge conductor and a capacitive tuning network. The capacitive tuning network may include a discrete capacitor or an adjustable capacitor which varies in response to a signal.

Growing community of inventors

Redwood Estates, CA, United States of America

Thomas Trumbull