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A compact substrate integrated waveguide (SIW) filter with an improved stopband using multilayer embedded mixed coupling (MC) is presented. By implementing MC into the input/output SIW, the filter not only exhibits good rejection for the upper stopband, owing to an additional controllable transmission zero, but also has a miniature size of 18 ?? 12 mm2 by profiting from its low-temperature co-fired...
A novel low-temperature co-fired ceramic (LTCC) dual-band bandpass filter with compact size is reported. By using three semi-lumped resonators, not only the upper passband frequency can be conveniently tuned, but also the transmission zeros generated between the two passbands can be easily controlled by the elements of each resonator. A 2.5/5.2GHz dual-band experimental filter has been designed and...