Abstract: An antenna (and concomitant method of making and communications method) comprising a conical radiating element and a circular radiating element surrounding a base of the conical radiating element.

Abstract: A method and apparatus for electronically steering a RADAR beam across an array of feed horns by moving the phase center of the beam to different origination points on the array—each origination point being the phase center of a feed horn pair. Variations include polarized beams, polarized feed horns, dual-beam systems, dual direction steering, diagonal steering, and cross-polarized wire grids to control beamwidth.

Abstract: A method and apparatus for electronically steering a RADAR beam across an array of feed horns by moving the phase center of the beam to different origination points on the array—each origination point being the phase center of a feed horn pair. Variations include polarized beams, polarized feed horns, dual-beam systems, dual direction steering, diagonal steering, and cross-polarized wire grids to control beamwidth.

Abstract: An antenna array system includes a launcher comprising an antenna configured to establish and steer a wavefront, and an array of Yagi-Uda director trains coupled to the launcher and located in the path of the wavefront. The array of Yagi-Uda director trains is configured to influence a beamwidth of the launcher. A method for beam steering includes launching a wavefront generated by an antenna through an array of director elements, and steering the wavefront. The array of director elements focuses the wavefront and influences gain of the antenna over plural steering angles.

Abstract: A radiometer horn, an array of such horns, and a method of making a radiometer horn, comprising providing at least two primary walls comprising interior corrugations and fitting into the corrugations at least one secondary wall comprising projections fitting into the corrugations, and wherein no fastener holds any of the at least one secondary walls to the primary walls.

Abstract: An antenna array system includes a launcher comprising an antenna configured to establish and steer a wavefront, and an array of Yagi-Uda director trains coupled to the launcher and located in the path of the wavefront. The array of Yagi-Uda director trains is configured to influence a beamwidth of the launcher. A method for beam steering includes launching a wavefront generated by an antenna through an array of director elements, and steering the wavefront. The array of director elements focuses the wavefront and influences gain of the antenna over plural steering angles.

Abstract: An antenna beam steering apparatus and method comprising providing an antenna, employing a beam-deflecting lens through which energy passing from and to the antenna is deflected, and rotating the antenna with a single-axis rotator.

Abstract: A dual-mode target seeking apparatus having a seeker dome defining an aperture and transmissive to microwave frequency energy of a first frequency and to light wave energy at a second frequency and at a third frequency. An optics system within the seeker dome is transmissive to the microwave frequency energy reflective to the light wave energy received via the aperture. A first detector receives the microwave frequency energy via the aperture, and a second detector images a target by the light wave energy of the second and third frequencies via the optics system.

Abstract: An inline phase shifter including a waveguide having a waveguide path and one of a micro-electromechanical device and a piezoelectric device positioned sufficiently adjacent to the waveguide for changing physical dimensions of the waveguide path upon actuation of the one device.

Abstract: A microstrip-waveguide transition for transmission of electromagnetic energy includes a waveguide having an open end, a dielectric substrate attached to the open end, a microstrip probe on the dielectric substrate, wherein a capacitive susceptance occurs across the open end when the open end is exposed to electromagnetic energy and wherein the capacitive susceptance is countered with inductive susceptance.

Abstract: An antenna having a dual-band driven element and a second antenna element simultaneously produces a directional radiation pattern at an upper frequency and an omnidirectional radiation pattern at a lower frequency. The dual-band driven element is formed as a dipole or monopole with at least one choke connected to the end of the dipole or monopole. In an exemplary embodiment, the dual-band driven element includes a central dipole or monopole that has chokes formed as u-shaped extensions located at the ends of the central antenna dipole or monopole. An antenna array includes the dual-band driven element and a second driven antenna element with a reflector and/or a director in a Yagi-Uda configuration. An antenna array includes the dual-band driven element with a reflector or with a reflector and a director in a Yagi-Uda configuration.

Abstract: A microstrip-waveguide transition for transmission of electromagnetic energy includes a waveguide having an open end, a dielectric substrate attached to the open end, a microstrip probe on the dielectric substrate, wherein a capacitive susceptance occurs across the open end when the open end is exposed to electromagnetic energy and wherein the capacitive susceptance is countered with inductive susceptance.

Abstract: An antenna having a dual-band driven element and a second antenna element simultaneously produces a directional radiation pattern at an upper frequency and an omnidirectional radiation pattern at a lower frequency. The dual-band driven element is formed as a dipole or monopole with at least one choke connected to the end of the dipole or monopole. In an exemplary embodiment, the dual-band driven element includes a central dipole or monopole that has chokes formed as u-shaped extensions located at the ends of the central antenna dipole or monopole. An antenna array includes the dual-band driven element and a second driven antenna element with a reflector and/or a director in a Yagi-Uda configuration. An antenna array includes the dual-band driven element with a reflector or with a reflector and a director in a Yagi-Uda configuration.

Abstract: An inline phase shifter including a waveguide having a waveguide path and one of a micro-electromechanical device and a piezoelectric device positioned sufficiently adjacent to the waveguide for changing physical dimensions of the waveguide path upon actuation of the one device.

Abstract: A broad band, balanced microwave component, such as an amplifier, includes an input Lange coupler having a first center frequency and an output Lange coupler having a second center frequency. The center frequencies of the two Lange couplers are offset or the coupling is different so that at least one of the cross-over points of the input Lange coupler is offset in frequency from both the cross-over points of the output Lange coupler. The pair of Lange couplers so offset in frequency yields no more than one peak in gain which is readily equalized by single-ended amplifiers within the balanced amplifier.

Abstract: A probe-fed slot antenna is provided having an inner conductor, a cylindrical outer conductor coaxial with the inner conductor, and a plurality of slots in the outer conductor. A plurality of probes extend from the cylindrical outer conductor into the interior, each probe adjacent to one of the slots. A coupling ring is mounted coaxially between the outer and inner conductors to allow efficient transfer of RF energy to and from the slots.