Design of contiguous RF filterbanks with application in channelised receivers

Design techniques for miniature contiguous filterbanks for use in channelised receivers operating in high pulse density environments are presented. These devices use a new prototype transfer function with a maximally flat impulse response which minimises ringing in the time domain caused by pulsed signals. The devices are designed to combine small size with high performance and good manufacturing tolerances. The devices are constructed using a hybrid of printed circuit and lumped element techniques. Measured results for 10 channel and 27 channel devices operating at a 1 GHz centre frequency with channel bandwidths of 20 MHz are presented