Ceramic diplexers and multiplexers offer performance benefits that fall between Cavity and Lumped element diplexer capabilities and characteristics. Most often, they’re used because of a system’s size constraints. Ceramic diplexers are offered as non-hermetic surface mount designs or in hermetic housings with connectors.
This diplexer uses TE Mode waveguide puck resonators to achieve narrowband filters of less than 0.25% bandwidth yet still provide a pass band loss on the order of < 1.5 dB. In addition to the low loss provided by the high Q ceramic resonators, cross coupling is used to achieve very deep rejection of 75 dBc at a 4:1 shape factor. This device also incorporates a sampling coupler and is available in both diplexer and double band pass configurations in frequency ranges of 2250 MHz to 2800 MHz...
This cavity diplexer features a compact size, a ruggedized package for Hi-Rel environments, high isolation and small separation between channels, and more. It operates in the 400-500 MHz frequency range and is ideal for airborne, ship, or vehicle mount applications in military environments.
