Andrew Corporation

Channel Master Limited

Raven Manufacturing Limited

Raven Nc LLC

Andrew Patrick Baird

Neil Wolfenden

Jamie Stokes

Stephen John Flynn

Craig Mitchelson

Gerard King

Jonathan Walker

Fiona Isabel Bruce

A method and apparatus for energizing a multi-channel LNBF containing multiple LNB(s) the LNBF connected to multiple IRDs. The number of IRDs present is detected. If more than one IRD is present, all LNBs are energized. If only one IRD is detected, power sufficient to supply the LNB the IRD has selected is supplied. Identification of which LNB the single IRD has selected may be determined by monitoring the presence of a desired voltage, frequency tone, and or series of frequency tones.

Method and apparatus for DC power management within multi-channel LNBF

A feed having a waveguide with a longitudinal axis. A plurality of corrugations extending from an end of the waveguide. The corrugations coaxial with the longitudinal axis, forming an extension of the waveguide. The corrugations having an end face angle less than 90 degrees with respect to the longitudinal axis to squint the feed beam.

Squint-beam corrugated horn

A waveguide for use with a dual polarization waveguide probe system is described which provides an improved frequency response across a desired frequency range (10.7 to 12.75 GHz) and particularly at the band edges. This is achieved by providing a waveguide with a rotator that incorporates a reflector plate in combination with a differential phase shifter in the form of a waveguide of slightly asymmetrical cross section so that orthogonal signals which travel through this portion have a different cut-off wavelength. This results in a rotator which achieves 180&#xb0; of phase shift between two orthogonal components across the frequency range of signals received by the waveguide. The reflector plate and the differential phase shifter have inverse frequency characteristics so that the combined phase shift characteristic of the rotator has a flatter frequency characteristic.

Waveguide for use in dual polarisation probe system having a signal reflector and rotator provide differential phase shift

A multi-beam feed assembly having a feed assembly housing with a plurality of input waveguide(s) formed in a front face. The housing may be adapted for manufacture via die casting. The housing also having at least two PCB mounting surface(s), a plurality of probe aperture(s) through the housing between the input waveguide(s) and at least one of the PCB mounting surface(s) and at least one interconnect waveguide through the housing between two of the PCB mounting surface(s). A plurality of PCB may be coupled to the housing at the PCB mounting surfaces. A plurality of transition probe(s) located in the probe aperture(s) coupling each input waveguide to one of the plurality of the PCB and the at least one interconnect waveguide between the at least two PCB mounting surfaces coupling signals between the PCB.

Multiple beam feed assembly

There is disclosed herein a waveguide rotator for use with a dual polarization waveguide probe system. The waveguide has an internal structure that protrudes into the waveguide such that a first orthogonal component of the incident polarized signal propagates to the end of the waveguide and is reflected therefrom and the second orthogonally polarized component is cut-off by the protruding structure which narrows the waveguide, at a distance from a short circuit at the end of the waveguide, and is reflected substantially at the cut-off point, the cut-off point being frequency dependant. At some predetermined distance from the reflecting means and the cut-off point, the first component and the second component are recombined such that the polarization of the recombined structure is rotated 90&#xb0; from the incident polarization. The protruding interior surface creates a pocket or cavity behind the waveguide into which components from a circuit board can be inserted.

Dual polarization waveguide probe system with wedge shape polarization rotator

A receptacle with an adjusting slot is adapted to receive a mounting lip of the feed assembly. A means for positioning which may include a threaded shaft threaded into a first side of the receptacle that projects into a first side of the mounting lip, is operative to move the mounting lip within the adjusting slot. A bias spring may be positioned between the mounting lip and a second side of the mounting lip, the bias spring biasing the mounting lip against the threaded shaft. Alternatively, the threaded shaft may extend threaded through the mounting lip, longitudinally retained with respect to the receptacle operative to move the mounting lip along the adjusting slot as the threaded shaft is rotated.

High resolution orientation adjusting arrangement for feed assembly

A first waveguide to microstrip transition, the waveguide having a top, a bottom, a first sidewall, a second sidewall and a closed end. A transition slot normal to a longitudinal axis of the waveguide intersects the top and the first sidewall. A probe having a 90 degree bend is arranged in the transition slot, a distal end of the probe projecting into the waveguide normal to the top. A proximal end of the probe is coupled to a microstrip on a dielectric substrate. An impedance matching feature may be included projecting from the bottom, proximate the distal end of the probe. A hole may be formed in the dielectric substrate proximate the proximal end of the probe. A second waveguide and transition arrangement may be aligned bottom to bottom with the first waveguide and similarly arranged with a probe coupled to a second microstrip on the dielectric substrate.

Waveguide to microstrip transition with a 90&#xb0; bend probe for use in a circularly polarized feed

A dual circular polarization waveguide () is described which has a septum () which divides the waveguide () into two separate compartments () each with a probe (A,B) passing through the end wall () of the waveguide () into the compartment () to detect respective signals in each of the compartments (). The septum () is proportioned and dimensioned to convert the left and right circularly polarized signals, into substantially linearly polarized signals as the signals pass along the waveguide () past the septum () so as by the time the signals reach the probes (A,B) they are linearly polarized. The probes (A,B) which pass through the rear wall () of the waveguide () are oriented such that they couple into the magnetic field of the primary or fundamental waveguide mode. These probes (A,B) do not require to be orthogonal to each other but each probe (A,B ) has a free end disposed in proximity to a waveguide wall or the septum () within a respective compartment () so that the probe (A,B) is capacitively coupled to the waveguide wall or septum () to allow the probe (A,B) to couple into the respective magnetic field in the compartment ().

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Hampshire, United Kingdom

Andrew Patrick Baird