Evanescent mode microwave bandpass filter with a rotatable crank

Evanescent mode triple ridge lowpass harmonic filter

Evanescent resonators

Extended resonator electronically tunable band pass filter

Extracted pole filter

Ferrite substrate microwave filter

Ferromagnetic resonance device

Filled resonant cavity filtering apparatus

Filter

Filter

Filter

Filter

Filter and method of arranging resonators

Filter and radio communication apparatus using the same

Filter and radio communication device using the same

Filter and tuning element

Filter apparatus

Filter apparatus and method

Filter apparatus, duplexer, and communication apparatus

Filter arrangement including a non-reversible circuit element, a