Toyon Research Corporation

Raytheon Company

Michael A Gilbert

Donald H Archer

Michael J Maybell

A Vincent Mrstik

Michael P Grace

Andrew I Hamill

Kevin C Higgins

Robert H Loomis

An improved implementation of a 2&#xd7;4 divider formed from a bridge junction is described. The bridge junction uses parallel and series connections of coaxial lines to eliminate impedance transformers that are normally required in a 2&#xd7;4 power divider. In a preferred embodiment, the bridge junction is comprised of UT-085 coax transmission lines, 20 gauge twin lead wire and SB-805-61 ferrite beads with &#xbd; turn windings to provide a wide bandwidth, compact, high power and rugged arrangement.

Wide bandwidth integrated 2X4 RF divider

A large aperture lightweight antenna uses an inflatable spherical surface deployed within a lighter than air platform. Beam steering is accomplished by moving the RF feedpoint(s) with respect to the reflector. The antenna can use an inflatable collapsible transreflector.

Inflatable-collapsible transreflector antenna

A reflector type radio frequency antenna having: a feed for producing a difference radiation pattern with a cone-shaped null region; and, a reflector having a surface disposed to reflect a portion of the energy in the difference radiation pattern and having the edge disposed in the cone-shaped null region. With such arrangement, since the edge of the reflector is disposed in the null region of the difference radiation pattern such edge is not radiated with energy which could otherwise illuminate such edge, scatter, and thereby generate unwanted side lobes in the free space antenna pattern.

Radio frequency antenna having a reflector with an edge in a pattern

Growing community of inventors

Santa Barbara, CA, United States of America

Michael A Gilbert