Abstract: In one preferred embodiment, a dual band antenna having a radiating element which includes: a one-quarter PCS wavelength radiating portion which serves as a base; a one-half PCS wavelength radiating portion; a PCS phasing coil joining the one-quarter PCS wavelength radiating portion to the one-half PCS wavelength radiating portion, wherein the PCS phasing coil substantially allows energy in the AMPS band to pass therethrough; a one-half AMPS wavelength radiating portion; and an AMPS phasing coil joining the one-half AMPS wavelength radiating portion to the one-half PCS wavelength radiating portion, wherein the AMPS phasing coil substantially prevents energy in the PCS band from passing therethrough, and wherein the AMPS phasing coil provides a 180 degree phase shift for energy in the AMPS band.

Abstract: A communication system for transferring data through the air over a relatively short fixed distance comprising a transmitting antenna which comprises a leaky coaxial cable for radiating electromagnetic energy modulated with data to be transferred; and a plurality of non-linear fixed beam array antennas for receiving the modulated electromagnetic energy from the leaky coaxial cable. The plurality of fixed beam array antennas are juxtaposed with the transmitting antenna such that the transmitting antenna extends at least partially through the near-field regions of the plurality of fixed beam array antennas. The communication system also comprises a selection means which determines which radio frequency output from the plurality of non-linear fixed beam array antennas exhibits the greatest radio frequency power and outputs that particular radio frequency output to a receiver.

Abstract: A communication system for transferring data through the air over a relatively short fixed distance comprising a transmitting antenna which comprises a leaky coaxial cable for radiating electromagnetic energy modulated with data to be transferred; and a plurality of non-linear fixed beam array antennas for receiving the modulated electromagnetic energy from the leaky coaxial cable. The plurality of fixed beam array antennas are juxtaposed with the transmitting antenna such that the transmitting antenna extends at least partially through the near-field regions of the plurality of fixed beam array antennas. The communication system also comprises a selection means which determines which radio frequency output from the plurality of non-linear fixed beam array antennas exhibits the greatest radio frequency power and outputs that particular radio frequency output to a receiver.

Abstract: A communication system for transferring data through the air over a relatively short fixed distance comprises a transmitting antenna comprising a leaky coaxial cable for radiating electromagnetic energy modulated with data to be transferred; and a non-linear fixed beam array antenna for receiving the modulated electromagnetic energy from the leaky coaxial cable. The fixed beam array antenna is juxtaposed with the transmitting antenna such that said transmitting antenna extends at least partially through the near-field region of the fixed beam array antenna. The fixed beam array antenna comprises four conductive patch elements comprising two inner patch elements and two outer patch elements juxtaposed linearly on a substantially flat substrate, wherein each of the patch elements is arranged to transduce electromagnetic energy with corresponding electric signals.

Abstract: A planar patch array antenna for satellite communications. The antenna includes a planar patch array and a dual axis positioner for rotating the array about azimuth and elevation axes. The dual axis positioner is unique in that it consists of a plurality of individual modules which can be easily assembled and disassembled. The positioner consists of the following modules: a fixed pedestal, an azimuth drive module, an azimuth rotary module, an RF/slip ring module, an elevation drive module, an antenna support and an electronic module. According to the invention, the pedestal remains fixed and the azimuth drive module is received in a recess defined by the pedestal. The azimuth rotary module is rotatably supported on the pedestal and is driven by the azimuth drive module so that it rotates about the vertical or azimuth axis. The elevation drive module is fixed to the rotary drive module and rotatably supports the antenna support module.