Abstract: Various embodiments implement waveguides for signal distribution or signal filtering in satellite receivers. According to some embodiments, a low noise block downconverter (LNB) is implemented using waveguides configured for signal distribution, band pass filtering, low pass filtering, high pass filtering, or band stop filtering. For some embodiments, the waveguides may be formed by the LNB chassis and the ground plane of a printed circuit board mounted to the LNB chassis.

Abstract: Various embodiments implement waveguides for signal distribution or signal filtering in satellite receivers. According to some embodiments, a low noise block downconverter (LNB) is implemented using waveguides configured for signal distribution, band pass filtering, low pass filtering, high pass filtering, or band stop filtering. For some embodiments, the waveguides may be formed by the LNB chassis and the ground plane of a printed circuit board mounted to the LNB chassis.

Abstract: A tuner uses a bank of tracking filters to preselect a channel to be received. Each tracking filter covers a range of frequencies. The tracking filters are tunable in frequency using switched capacitors and are tunable in gain by using switched resistors. The switched resistors can be controlled by an automatic gain control circuit that monitors the selected signal and adjust the tracking filter gain to achieve a desired signal level. A switch directs the received signal or signal from a test tone generator into the tracking filters. The test tone, generated by a frequency agile circuit, can be used to calibrate the filters, both in frequency and gain.