Abstract: A stable coaxial antenna for broad band and narrow band applications is described. The antenna disclosed is preferably made of a conventional coaxial cable having a center conductor, tubular outer conductor surrounding the center conductor and an insulator between the conductors. A gap is formed in at least the outer conductor to form two outer conductor sections. In a first embodiment the field is provided between the gap and a feed end. In a second embodiment the gap is between both center and outer conductors and the ends of the conductors in the gap are cross connected to form a radiating section and feed section. The coaxial antennas disclosed may be adjusted to synchronize the energy to react favorably to an uncontrolled environment.

Abstract: Single and multiple radiator element planar array antennas and a method of making are disclosed. A styrofoam dielectric substrate, a die cut conductive first layer, preferably copper foil, secured to one surface and a conductive second layer, preferably aluminum foil, on the other surface forms the ground plane. A cutting die of cutting blades in a required array on a cutting press is used to cut through the conductive layer and into the dielectric layer in a sandwich of the two to provide inexpensive, durable and dimensionally stable antennas.

Abstract: A conformal antenna assembly disclosed has a first antenna portion sensitive to a UHF band of frequencies. A thin, flat, low-profile, weather-resistant housing encloses the first antenna portion. The housing has a conformal back surface that conforms to the shape of a support surface on which said housing is mounted. The housing has an arrangement to mount the housing to a support surface. In one form the housing is flat to mount on the side of a building and in another form is double curved to mount on the back of a satellite dish. A coaxial cable has a center conductor and a tubular outer conductor with an insulator between the conductors. The center conductor and outer conductor are connected at one end to the first antenna portion. The inner conductor terminates at the other end in an end terminal to conduct signals from the first antenna portion to the end terminal.

Abstract: Planar serpentine antennas disclosed include a generally flat, non-conductive carrier layer and a generally flat radiator of a preselected length and arranged in a generally serpentine pattern that is secured to a surface of the carrier layer. One form of the antenna disclosed that is particularly suited for vehicle transceivers and mounting on a vehicle window in a stick-on fashion has a series of change of direction points characterized by a succession of right angle turns and back folds to obtain substantially the greatest length in the smallest surface area. Another form of the antennas disclosed that are particularly suited for AM/FM radios, stereos, etc. have a sinuous pattern with radiator sections in parallel spaced relation to one another and further are connected at opposite ends in curved back folds.

Abstract: A microwave circuit module, more particularly an antenna, comprised of a polyethylene foam substrate having a loss tangent less 0.001 and a dielectric constant less than 1.3, a predetermined pattern of one or more elements, such as an array of n.times.m radiator elements, formed of electrically conductive material, deposited on a first surface of the substrate, and an electrically conductive ground plane secured to the opposite surface of the substrate. In the antenna embodiment, a feed network formed of electrically conductive material is deposited on said said first surface of the substrate for electrically interconnecting the radiator elements in the array; and I/O means are coupled to the feed network for supplying a signal to be transmitted by the antenna or for receiving a signal received by that antenna.

Abstract: Microstrip antennas disclosed have one or a plurality of radiators arranged in selected arrays wherein a different and preferably lower dielectric layer is provided between the radiator and ground reference than between the feedline and ground reference. Relatively inexpensive and durable dielectric layers of polyethylene having a dielectric constant between 1.05 and 1.5 have been found suitable for between the radiator and ground reference and air for between the feedlines and ground reference. Arrays of four of the radiators disclosed provide for both horizontal and vertical polarization, isolated polarizations and circular polarization of wave energy. The radiators are series-corporate fed and corporate fed.