Abstract: A notch radiator apparatus includes: a planar circuit board having a plurality of different planar layers; a balun cavity formed between two ground layers of the planar circuit board that are separated by a laminated layer; a conductive notch formed horizontally in a plane parallel to the planar circuit board by two three dimensional (3D) structures formed on a top surface of the circuit board; a stripline signal feed folded within planar circuit board layers; and a plated hole formed vertically in a plane perpendicular to the planar circuit board and extending from the stripline signal feed. The stripline signal feed electromagnetically transfer radio frequency (RF) energy into or out of the antenna notch radiator apparatus.

Abstract: An antenna is provided and includes a radiator assembly extending along a first plane, a patterned ferrite layer extending along a second plane and a band stop frequency selective surface (FSS) extending along a third plane. The third plane of the band stop FSS is axially interposed between the first plane of the radiator assembly and the second plane of the patterned ferrite layer.

Abstract: A notch radiator apparatus includes: a planar circuit board having a plurality of different planar layers; a balun cavity formed between two ground layers of the planar circuit board that are separated by a laminated layer; a conductive notch formed horizontally in a plane parallel to the planar circuit board by two three dimensional (3D) structures formed on a top surface of the circuit board; a stripline signal feed folded within planar circuit board layers; and a plated hole formed vertically in a plane perpendicular to the planar circuit board and extending from the stripline signal feed. The stripline signal feed electromagnetically transfer radio frequency (RF) energy into or out of the antenna notch radiator apparatus.

Abstract: An antenna is provided and includes a radiator assembly extending along a first plane, a patterned ferrite layer extending along a second plane and a band stop frequency selective surface (FSS) extending along a third plane. The third plane of the band stop FSS is axially interposed between the first plane of the radiator assembly and the second plane of the patterned ferrite layer.

Abstract: The embodiments described herein are directed to providing a notched antenna element for improving polarization control without sacrificing gain, bandwidth, scan volume, recurring cost, or manufacturability. The notched antenna element includes a base portion comprising a plurality of contiguous first cross-sectional notched antenna elements, each of the plurality of first cross-sectional notched antenna elements configured in an end-loaded structure for increasing polarization stability; and an upper portion coupled to the base portion, the upper portion comprising a plurality of contiguous second cross-sectional notch antenna elements.

Abstract: According to one embodiment, an antenna apparatus includes first and second antenna arrays configured in a support structure. Each antenna array has multiple antenna elements that transmit and/or receive electro-magnetic radiation. The elements of the first antenna array are oriented in a boresight direction that is different from the boresight direction in which the elements of the second antenna array are oriented. A plurality of switches alternatively couples the first antenna elements or the second antenna elements to a signal distribution circuit.

Abstract: A differential feed notched radiator. A notched radiator includes a planar dielectric substrate having a first surface and an oppositely facing second surface, and a first conductive layer on the first surface and a second conductive layer on the second surface. The first and second conductive layers are patterned to provide a tapered notch in a first region of the planar dielectric substrate, the tapered notch having a first end and a second end wider than the first end, and the first and second conductive layers patterned to provide a balun in a second region of the planar dielectric substrate, the balun connected with the first end of the tapered notch. A conductive strip for transferring differential signals is embedded in the planar dielectric substrate between the first and second conductive layers, a portion of the conductive strip intersecting a portion of the tapered notch near the first end.

Abstract: According to one embodiment, an antenna array includes a plurality of first antenna elements having a first polarity and a plurality of second antenna elements having a second polarity. A feed circuit couples the plurality of first antenna elements and the plurality of second antenna elements to an antenna drive circuit. The feed circuit is configured on a plurality of columns extending in a direction that is oblique to the plurality of first antenna elements and the plurality of second antenna elements.

Abstract: A coaxial transition includes a first conductor aligned along a first axis. The transition also includes a ground shield surrounding the first conductor such that a first gap exists between the first conductor and the ground shield. An electric field radiates between the first conductor and the ground shield through the first gap. The transition further includes a second conductor aligned along a second axis and coupled to the first conductor. The second conductor forms a second gap between the second conductor and a portion of the ground shield. A first portion of the electric field radiates between the second conductor and the ground shield through the second gap. The transition also includes a top ground plane aligned substantially parallel to the second conductor. A third gap exists between the top ground plane and the second conductor. The second gap and the third gap are substantially parallel with the second conductor therebetween.

Abstract: According to one embodiment, an antenna apparatus includes first and second antenna arrays configured in a support structure. Each antenna array has multiple antenna elements that transmit and/or receive electro-magnetic radiation. The elements of the first antenna array are oriented in a boresight direction that is different from the boresight direction in which the elements of the second antenna array are oriented. A plurality of switches alternatively couples the first antenna elements or the second antenna elements to a signal distribution circuit.

Abstract: According to one embodiment, a first magnetic coupling element is coupled to a first conductive element of a first electrical circuit. A second magnetic coupling element is coupled to a second conductive element of a second electrical circuit. The second magnetic coupling element is operable to attract the first magnetic coupling element using a magnetic force such that electrical contact is made between the first conductive element and the second conductive element.

Abstract: The embodiments described herein are directed to providing a notched antenna element for improving polarization control without sacrificing gain, bandwidth, scan volume, recurring cost, or manufacturability. The notched antenna element includes a base portion comprising a plurality of contiguous first cross-sectional notched antenna elements, each of the plurality of first cross-sectional notched antenna elements configured in an end-loaded structure for increasing polarization stability; and an upper portion coupled to the base portion, the upper portion comprising a plurality of contiguous second cross-sectional notch antenna elements.

Abstract: In one embodiment, a low profile antenna according to the present invention comprises a balanced transmission line, electronic circuitry, and a parasitic element. The electronic circuitry is coupled to an interconnecting end of the transmission line and operable to direct electromagnetic energy through the transmission line to a terminating end. The parasitic element has a surface that is disposed at a predetermined distance from the terminating end and normal to the central axis such that the surface of the parasitic element covers an opening formed by the terminating end.

Abstract: A differential feed notched radiator. A notched radiator includes a planar dielectric substrate having a first surface and an oppositely facing second surface, and a first conductive layer on the first surface and a second conductive layer on the second surface. The first and second conductive layers are patterned to provide a tapered notch in a first region of the planar dielectric substrate, the tapered notch having a first end and a second end wider than the first end, and the first and second conductive layers patterned to provide a balun in a second region of the planar dielectric substrate, the balun connected with the first end of the tapered notch. A conductive strip for transferring differential signals is embedded in the planar dielectric substrate between the first and second conductive layers, a portion of the conductive strip intersecting a portion of the tapered notch near the first end.

Abstract: A coaxial transition includes a first conductor aligned along a first axis. The transition also includes a ground shield surrounding the first conductor such that a first gap exists between the first conductor and the ground shield. An electric field radiates between the first conductor and the ground shield through the first gap. The transition further includes a second conductor aligned along a second axis and coupled to the first conductor. The second conductor forms a second gap between the second conductor and a portion of the ground shield. A first portion of the electric field radiates between the second conductor and the ground shield through the second gap. The transition also includes a top ground plane aligned substantially parallel to the second conductor. A third gap exists between the top ground plane and the second conductor. The second gap and the third gap are substantially parallel with the second conductor therebetween.

Abstract: In one embodiment of the disclosure, a dual polarized antenna includes first and second active elements and at least one parasitic element disposed a predetermined distance from the first and second active elements. Circuitry is coupled to the first and second active elements and operable to generate electro-magnetic energy from the first and second active elements along a direction of propagation. The first active element having a direction of polarization that is different than a direction of polarization of the second active element.

Abstract: According to one embodiment, an antenna array includes a plurality of first antenna elements having a first polarity and a plurality of second antenna elements having a second polarity. A feed circuit couples the plurality of first antenna elements and the plurality of second antenna elements to an antenna drive circuit. The feed circuit is configured on a plurality of columns extending in a direction that is oblique to the plurality of first antenna elements and the plurality of second antenna elements.

Abstract: According to one embodiment, a first magnetic coupling element is coupled to a first conductive element of a first electrical circuit. A second magnetic coupling element is coupled to a second conductive element of a second electrical circuit.

Abstract: In one embodiment of the disclosure, a dual polarized antenna includes first and second active elements and at least one parasitic element disposed a predetermined distance from the first and second active elements. Circuitry is coupled to the first and second active elements and operable to generate electro-magnetic energy from the first and second active elements along a direction of propagation. The first active element having a direction of polarization that is different than a direction of polarization of the second active element.

Abstract: An apparatus includes a slot defined by electrically conductive material, an electrically conductive element extending generally transversely to the slot in the region of a first end thereof, and a balun portion communicating with the first end of the slot, the balun portion having a high impedance and being configured to provide a selected degree of absorption of electromagnetic energy.