Radio Frequency Systems, Inc.

Kevin J Connolly

Sheldon Kent Meredith

Pitt W Arnold

Kevin M Gaukel

Warren Frederick Hunt

S Nicholas Studer, Jr

An improved antenna system for use at high frequencies such as cellular communication and PCS frequencies, having a steerable, multi co-linear array antenna in which the number of radiating elements per co-linear array increases monotonically from the periphery of the antenna to the middle of the antenna, and wherein the antenna is connected to a Butler matrix feed network, thereby providing steerability of the radiation pattern associated with the antenna. The improved antenna system achieves significantly lower sidelobe generation as compared to antenna systems using multiple co-linear arrays of radiating elements in which the number of radiating elements per co-linear array is constant. The Butler matrix feed network is implemented via a microstrip fabricated printed circuit board without crossovers.

Antenna system with tapered aperture antenna and microstrip phase

A broadband antenna array, formed of pairs of horizontally-spaced dipoles that are balun-fed, uses an air dielectric microstrip binary-feed network to optimize antenna bandwidth. Each dipole is fed by a three-wire balun which maintains the proper current distribution on the dipoles over the operating bandwidth. The binary-feed network feeds each dipole individually to further optimize the antenna's pattern bandwidth. The binary-feed network is formed using a conductive ground plane with spaced conductors to utilize an air dielectric, thereby minimizing antenna losses in the feed network. The feed network impedances are chosen to give a broadband impedance match to the dipoles, and the entire assembly of binary-feed network and dipoles is mounted in a reflector box, the dimensions of which are chosen to control the antenna beamwidth. Vertically stacked pairs are used to compress the vertical radiation pattern for greater antenna gain.

Broadband directional antenna having binary feed network with microstrip

An antenna base having a metal foot and plastic bezel injection molded around the metal foot to engage the metal foot. Double sided adhesive tape connects the antenna base to a non-conductive surface of a motor vehicle. In most instances this is a motor vehicle windshield. Inside the motor vehicle a coupling box connects communications signals from a signal source through the windshield to the metal foot. The coupling box supports a printed circuit board having conductive patterns on both sides for sending and receiving these communications signals. The metal foot also includes structure that allows an elongated antenna to be adjustably supported by the base in a signal sending and receiving orientation.

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Freehold, NJ, United States of America

Kevin J Connolly