Twin strip resonators and filters constructed from these resonat

Twisted waveguide and wireless device

U-shaped microwave and millimeter wave resonator filter

UHF bandpass filter

UHF Filter assembly

Ultra-high frequency filter with a dielectric resonator tunable

Varactor tunable coupled transmission line band reject filter

Varactor tuned helical resonator for use with duplex filter

Varactor-tuned helical resonator filter

Variable printed circuit waveguide filter

Variable radio frequency band filter

Variable radio frequency band filter

Variable radio frequency band filter

Variable radio frequency band filter

Variable tuning filter in high frequency circuit

Variable waveguide

Variable-frequency high frequency filter

Variable-frequency resonator circuit, variable-frequency...

Vertical coupling structure for non-adjacent resonators

Very high frequency (VHF) sharp tuned elliptic filter and...