Abstract: A rectangular waveguide circulator consists of multiple sections that meet at a common junction where a tapered ferrite portion is disposed. A ferrite portion is disposed within a hollow space adjacent the common junction. The ferrite portion has a shape that includes an upper portion, a middle portion, and a lower portion, such that a cross sectional area of the upper portion is greater than a cross-sectional area of the middle portion, and such that a cross sectional area of the lower portion is greater than the cross-sectional area of the middle portion.

Abstract: A waveguide connector assembly for coupling a waveguide to a microwave device includes a male part and a female part. The male part includes a threaded external cylindrical surface defining a male center axis, a first end surface, and a second end surface opposed to the first end surface. The female part includes a first annular end surface, a second annular end surface opposed to the first annular surface, a threaded internal cylindrical surface configured to engage with the threaded external cylindrical surface of the male part, and a gap in the threaded internal cylindrical surface from the first end annular end surface to the second annular end surface, and extends in a female radial direction the entire width of the first annular end surface and the second annular end surface.

Abstract: A waveguide connector assembly for coupling a waveguide to a microwave device includes a male part and a female part. The male part includes a threaded external cylindrical surface defining a male center axis, a first end surface, and a second end surface opposed to the first end surface. The female part includes a first annular end surface, a second annular end surface opposed to the first annular surface, a threaded internal cylindrical surface configured to engage with the threaded external cylindrical surface of the male part, and a gap in the threaded internal cylindrical surface from the first end annular end surface to the second annular end surface, and extends in a female radial direction the entire width of the first annular end surface and the second annular end surface.

Abstract: An airflow management cover for a vehicle subsystem arranged proximate a section of the vehicle to guide oncoming ambient airflow when the vehicle is in motion includes a convex body. The convex body has an exterior surface shaped to redirect an external portion of the oncoming ambient airflow around the vehicle subsystem to thereby minimize aerodynamic drag and reduce aerodynamic lift on the vehicle body. The airflow management cover also includes an aperture defined by the convex body and configured to exhaust a stream of a subsystem portion of the oncoming airflow to rejoin with the redirected external portion of the oncoming airflow after the subsystem portion of the airflow has passed across the subsystem. The airflow management cover additionally includes a fastening flange extending from the convex body and configured for mounting to the vehicle section. A vehicle having such an airflow management cover is also disclosed.

Abstract: An apparatus for a wireless transmission of high data rate signals such as received from an optical interface including gigabit fiber channel or a sonet. The architecture combines direct detection of the optical signal with clock and data recovery circuit and a differential signal encoder which is preferably a differential quadrature phase shift encoder and modulator pair. A millimeter wave, local oscillator and up conversion chain converts the optical input signal to a microwave carrier. In the opposite direction, the down converted signal is non-coherently phase detected and fed to a pair of synchronized clock and data recovery circuits to recover I and Q channel signals. These recovered signals are then combined prior to re-timing before they are fed back to the optical transceiver.

Abstract: A radio for use in microwave datalink applications in which a common local oscillator is used for both a final radio frequency (RF) up-converter stage and an initial RF down converter stage. The frequency of the common local oscillator corresponds to an integer multiple of a local oscillator needed for an earlier up-converter or later down converter stage. The circuit can be used to provide a radio frequency carrier in a 30 GHz band using Coaxial Resonator Oscillators (CRO's) that lend themselves to a planar microstrip circuit implementation.

Abstract: A point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode using direct digital modulation with an ON-OFF Keyed (OOK) scheme. The transmit signal is generated by a circuit that uses an oscillator operating in a microwave radio band. The oscillator output is switched at the input bit rate. The output of the switched oscillator is then frequency multiplied by the predetermined factor to produce the modulated microwave output signal at the desired band.