A choke flange suppresses RF leakage via a λ/4-deep groove (e.g., 7.5 mm for 10 GHz) around the mating surface. It uses annular slots to reflect waves, achieving >30 dB return loss. Must maintain 0.05 mm flatness tolerance (per MIL-F-3922) and gold-plated contacts for low resistance (<0.1Ω). Common in radar/WiGig systems. Flange Structure At 3 […]
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Waveguide clamps must be spaced ≤1.5x waveguide width (e.g., 30 cm for 20 cm-wide guides) per MIL-STD-1678. Torque bolts to 5–7 Nm to prevent deformation. Use aluminum or brass clamps to avoid galvanic corrosion. Ensure 0.5–1 mm gap for thermal expansion. Ground every 3rd clamp per IEEE 287 to maintain RF shielding. Fixture Types Last
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