Custom RF & Microwave Vacuum Feedthroughs

RF & microwave vacuum feedthroughs provide hermetic coaxial signal interfaces for transmitting high-frequency electrical signals across HV/UHV vacuum boundaries.

They are designed for applications where impedance control, low insertion loss, and vacuum integrity are critical, including accelerators, RF diagnostics, and research vacuum systems.

• Signal type: RF & microwave coaxial
• Frequency range: DC to GHz (application-dependent)
• Vacuum rating: HV / UHV compatible
• Connector options: SMA, 2.92 mm (K), N-type, BNC
• Sealing: Ceramic-to-metal hermetic seal
• Operation: CW or pulsed RF

What This Product Demonstrates

This page presents representative RF & microwave vacuum feedthrough designs. Final assemblies are custom-engineered based on frequency band, power level, flange standard, connector type, and vacuum requirements.

Typical Applications

• RF cavities and couplers
• Beam diagnostics and RF pickup systems
• Microwave diagnostics in accelerators
• Vacuum RF test stands
• Laboratory high-frequency instrumentation

Key Design Considerations

• Controlled impedance through ceramic-metal transition
• Low insertion loss and stable VSWR
• Thermal and mechanical stability during bakeout
• Grounding and shielding continuity
• Long-term reliability under vacuum cycling

Engineering Specification Checklist

• Target frequency range
• Insertion loss / VSWR requirement
• RF power level (CW or pulsed)
• Connector standard and channel count
• Vacuum level (HV / UHV)
• Bakeout temperature
• Flange type and mechanical constraints

Related Feedthrough Solutions

• Accelerator & BPM Feedthroughs
• High-Voltage Vacuum Feedthroughs
• High-Current Vacuum Feedthroughs
• Custom & Hybrid Feedthroughs

FAQ

Which RF connector should I choose?
Connector selection depends on frequency range and power level. SMA and 2.92 mm connectors are commonly used for higher-frequency applications, while N-type and BNC are suitable for lower-frequency diagnostics.

Are RF vacuum feedthroughs suitable for UHV systems?
Yes. Designs can support UHV environments with ceramic-to-metal hermetic sealing and bakeout-compatible materials.

What is the difference between an RF feedthrough and a microwave window?
RF feedthroughs are typically used for signal transmission and diagnostics with controlled impedance, while microwave windows are designed for high-power RF injection.