Abstract: A microwave patch antenna comprising: a plurality of conductive antenna patterns; a plurality of groundplanes; a plurality of feed elements; a plurality of feed slots to allow feed elements to pass through the non-woven dielectric spacers; and a plurality of dielectric separator layers comprised of corrugated non-woven fabric as necessary to form a patch antenna construction.

Abstract: A circulator capable of simultaneous transmit and receive operations, high frequency, high isolation and noise figure suppression comprising: an antenna port; a transmission port; a receiving port; three quadrature hybrids, two directional couplers; wherein transmit signal entering the transmit port are split into quadrature components and coupled separately and directionally by the two directional couplers to the antenna port where the coupled quadrature components of the transmit signal are recombined in phase, while the transmit leakage to the receive port are recombined destructively in phase; said arrangement simultaneously allows the receive signal entering the antenna port to be split into quadrature components by the antenna quadrature hybrid and transmitted through the directional couplers separately and entering the receive quadrature hybrid where the quadrature components of the receive signal are recombined in phase at the receive port; said arrangement reduces the insertion loss from the antenna

Abstract: A three port circulator capable of simultaneous transmit and receive operations, high frequency, enhanced high isolation, noise suppression at the receive port and broadband performance comprising: an antenna port; a transmission port; a receiving port; wherein each port is connected to a 90 degree combiner/divider or a quadrature hybrid for splitting an input signal into two output components, the said output components have a ninety degrees relative phase difference to each other; each of said 90 degree combiners/dividers or quadrature hybrids in addition to the connection to the above mentioned ports has at least two output connections each of which are connected to a ferrite circulator and if a fourth connection, said fourth connection is attached to a matching load circuit; this arrangement of circuits allows the phase shifted signals from the transmit port to enter the 90 degree combiner/divider or quadrature hybrid and be recombined in phase at the antenna port, any residue signal due to impedance mism

Abstract: A method of constructing fabric microwave antennas with a calendering apparatus which comprises: providing a calendaring apparatus having a plurality of roller two of said rollers are arranged as a nip or meeting point; heating said rollers located at said nip; setting the pressure at said nip or meeting point of said rollers; shaping antenna patches from conductive fabric; feeding at least one roll of carrier fabric into said heated and pressurized nip; placing said preformed conductive patches on to the carrier fabric before said carrier fabric enters said heated and pressurized nip of the calendering apparatus so that said preformed conductive patches and said carrier fabric are bonded or calendered by the heat and pressure effects of said nip; and cutting said calendered or bonded layers of conductive and non-conductive fabric into desired shapes for incorporation into flexible structures.

Abstract: A wideband antenna comprised of two or more conductive segments that are parasitically coupled.