MSW reflecting array filters

The background and status of new reflective array filter technology based on magnetostatic forward volume wave (MSFVW) propagation in low linewidth ( 0.5 0e) thin film yttrium-iron garnet. The propagation of MSFVW is nominally isotropic in the plane of the film, with a lowest order mode bandwidth of greater than 2 GHz with center frequency bias field tunable. Theory for single and double reflector arrays based on impedance discontinuities induced by the reflectors is discussed. Experimental results are presented for simple uniform arrays, weighted arrays, a 400 MHz bandwidth linear phase nondispersive delay line with a 30 dB insertion loss and a quadratic phase up chirp filter with a 200 MHz bandwidth product greater than 60 and 3 GHz center frequency. Finally, the future of these devices are discussed as well as their systems implications.