Abstract: An antenna (1) having an EM feed (6), a rear parabolic twist reflector (3) and a front transreflector (2). The transreflector is closer to the parabolic twist reflector than the focal point of the parabolic twist reflector, and the twist reflector is defined, mounted, or otherwise formed on a parabolic surface (17) of a base (13). The base is dimensioned and arranged to provide a foundation aligning an axis of the parabolic twist reflector with an axis of the antenna, and is further dimensioned and arranged to maintain substantial alignment of the feed and twist reflector with variations in ambient temperature that would otherwise produce at least one of warping and misalignment of the parabolic twist reflector in the absence of the base.

Abstract: A scanning antenna (1) has, a first waveguide (2) with parallel metal plates (10, 11), a waveguide feed (19) substantially at a focus (15) of the first waveguide (2), the plates (10, 11) being partially filled therebetween with a biconvex dielectric body (21) emanating a wave of planar phase front, and a planar waveguide bend (4) having a planar profile (13) redirecting an incident wave of planar phase front for propagation in a second waveguide (3) having an array of radiating antenna elements (5).

Abstract: A combined test fixture and spatial-power-combined amplifier includes a base, a first waveguide mounting flange engaged to said base, a second waveguide mounting flange engaged to said base, a waveguide input fixed to said first flange, a waveguide output fixed to said second flange, an amplifier array disposed between said first flange and second flange, said array comprising a plurality of semiconductors for amplifying a signal, and a spacer for spacing apart said semiconductors. A plurality of amplifier cards constitute the array, with the cards being disposed in various arrangements which include a linearly stacked arrangement and radially stacked arrangement. The first and second waveguide mounting flanges are constructed to slide along the base to enable the amplifier array to be easily changed.

Abstract: A high-powered, solid state microwave and millimeter wave, power combiner and divider is provided by using a plurality of radially oriented tapered slotline cards disposed in a center cylindrical coaxial section between its inner and outer conductors. The cylindrical coaxial section in turn is coupled to a conical input coaxial section that couples and distributes the input signal among the plurality of cards, and an output coaxial section that combines the output signal from the plurality of cards to an output coaxial terminal. The device is compact with broadband performance and provides a natural heat sink for a plurality of lower powered devices, which enables the power combiner to use a large number of lower powered devices to meet larger power requirements.

Abstract: A quasi-optical power combining array provides broadband, well heat sinked performance by means of coupling an array of parallel slotline transition modules between a input waveguide and an output waveguide. Each slotline transition module is comprised of a heat sinked ceramic substrate upon which a pair of tapered slot transitions is defined, each of which lead to a quasi-optical element such as an amplifier, which in turn is coupled to a corresponding pair of tapered slot transitions leading to the output waveguide. Each slotline module is symmetrically formed to maximize input and output tuning and selectively balanced operation.