Combline Bandpass Filter
UBS offers a line of directional semi-adjacent and adjacent channel filter/combiners for both analogue and digital MMDS system applications. The analogue version consists of three resonator filter sections, while the digital-ready version incorporates four. The channel filter/combiner is used to cascade the output of several transmitters into a common antenna waveguide line while providing protection to the transmitters against antenna line mismatches. The filters can be used to add transmitters to an existing network or can be configured to combine up to 16 arbitrary non-adjacent channels or up to 31 adjacent channels. The filters are constructed from lightweight aluminium for easy installation and come complete with the necessary hardware and test data.