Direct synthesis of generalized bandpass filters of arbitrary bandwidth

A simple and fast coupling matrix synthesis technique to directly synthesize generalized bandpass filters of arbitrary bandwidth is briefly discussed in this paper. Unlike those well-known coupling matrix synthesis techniques for generalized Chebyshev filtering function that are only accurate for narrowband filters, the technique is this paper can be used to synthesize filters of arbitrary bandwidth with arbitrarily placed transmission zeros. Compared with other synthesis techniques of wideband filters, the technique in this paper is much simpler and faster.