Description

A waveguide high-pass filter is a passive component that allows electromagnetic waves above a certain cutoff frequency to pass while attenuating lower frequencies. This behavior is intrinsic to waveguides themselves, but dedicated high-pass filters are engineered for sharper roll-off and better control over passband characteristics. 🔹 Key Characteristics: - Cutoff Frequency: Determined by the waveguide dimensions and mode of propagation (usually TE₁₀). - Design Types: - Iris-coupled cavities: Series of resonant cavities connected by irises. - Stepped waveguides: Sections with abrupt changes in width or height. - E-plane or H-plane ridged filters: For compact size and broader bandwidth. - Materials: Typically aluminum or brass, often gold-plated for millimeter-wave use. - VSWR: < 1.2:1 in passband - Insertion Loss: < 0.5 dB typical 🔹 Applications: - Radar front-ends - Satellite communication - Test setups to suppress harmonics or LO leakage