Patent
Electronically scanned cassegrain antenna with full aperture subreflector/radome
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TLDR
In this paper, a Cassegrain antenna system with a flat dielectric plate radome having a thickness of one-half wavelength at a frequency of operation is described. But the radome does not have an electrically conductive grid disposed on an inside surface thereof to permit perpendicularly polarized energy rays to pass there through.Abstract:
A Cassegrain antenna system (50) includes a flat dielectric plate radome (52) having a thickness of one-half wavelength at a frequency of operation. The plate has an electrically conductive grid (54) disposed on an inside surface thereof to permit perpendicularly polarized energy rays to pass therethrough. A parabolic twist reflector (70) is spaced from the radome, and includes a dielectric substrate (74) having a thickness equivalent to one-quarter wavelength at a frequency of operation and having formed on an interior surface thereof an array (72) of conductive strips oriented by 45 degrees relative to the incident ray polarization. An RF housing (60) including a plurality of RF feed elements (62A-62I) is located at the focal region and the elements spaced by a single beamwidth.read more
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Patent
Scanning antenna based on substrate integrated waveguide technology
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Directional antenna e.g. for satellite television, radar, has reflecting and partially transmitting-reflecting surfaces for transmission of electromagnetic energy and area between surfaces, resonator field is formed
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Patent
Method to measure coefficient of reflection of flat reflector in microwave range and device for its realisation
Choni Jurij Ivanovich,Romanov Anatolij Gennad Evich,Ajupov Timur Anvarovich,Danilov Igor Jur Evich,Gordeev Aleksandr Vasil Evich,Vygonskij Jurij Grigor Evich +5 more
TL;DR: In this article, the authors used a parabolic mirror with a radiator in its top and a radio transparent fixator with a mechanism of alignment of the flat reflector position to calibrate the reflection coefficient.
References
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Patent
Compact microwave and millimeter wave radar
George R. Huguenin,Ellen Moore +1 more
TL;DR: In this article, the authors presented a compact microwave and millimeter wave radars operating at 77 GHz and having resolution of no less than 3.2 meters at a distance of 100 meters.
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Antenna having two crossed cylindro-parabolic reflectors
TL;DR: In this paper, an antenna with two crossed cylindro-parabolic reflectors in which the generatrices of said reflectors are orthogonal is considered. And the source is placed close to the center of the main reflector, which is further provided with polarization rotation means.
Patent
Twist reflector antenna
Neil Williams,Robert Pearson +1 more
TL;DR: In this article, a bend reflector antenna consisting of a metallised plastics reflector and a sub-reflector was designed to extend at an angle of approximately 45° to that of the projections on the reflective surface.
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Sensor arrangement for munition
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