Abstract: The invention relates to the provision of LNB apparatus alone and/or in conjunction with a waveguide which is provided to process received data signals which are broadcast using satellite transmission systems. The wanted data signals are passed along at least two paths formed on the printed circuit board structure provided in the LNB. The printed circuit board structure includes at least one integrated circuit with an image rejection mixer or direct conversion mixer which allow the filtering out of the unwanted frequency bands from the received data. The printed circuit board is formed with at least two, but most typically three, conductive material layers in which the data paths are formed.

Abstract: Apparatus is provided to allow the reception and/or transmission of data signals at two different frequency bands. The apparatus includes a waveguide (4) which has a first section (6) of larger cross sectional area for receiving and/or transmitting the lower frequency band signals, and a reducing section (8) which leads to a section with a reduced cross sectional area in comparison to the first section (6) and this allows the receipt of the higher frequency band signals. In one embodiment sections of the waveguide can be rotated to allow the apparatus to be adjusted to any particular orientation to suit the particular circular polarity transmission type at the location at which the apparatus is provided at that time.

Abstract: Apparatus is provided to allow the reception and/or transmission of data signals at two different frequency bands. The apparatus includes a waveguide (4) which has a first section (6) of larger cross sectional area for receiving and/or transmitting the lower frequency band signals, and a reducing section (8) which leads to a section with a reduced cross sectional area in comparison to the first section (6) and this allows the receipt of the higher frequency band signals. In one embodiment sections of the waveguide can be rotated to allow the apparatus to be adjusted to any particular orientation to suit the particular circular polarity trans mission type at the location at which the apparatus is provided at that time.