A review of the design criteria for magnetostatic volume wave band-pas
s resonating filters will be presented. The prediction of the radiatio
n resistance and of the reactance of microstrip Lines coupled to magne
tic films in grounded configurations will be used to model straight ed
ge resonators by means of lumped elements As an application, the perfo
rmances of tunable single and multiple stage narrowband fitters workin
g at X-band will be evaluated.