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Waveguide Coupler

Looking for a waveguide directional coupler for your RF system? At Penta Laboratories, we supply standard and specialized microwave couplers, including broadband couplers, for industrial, scientific, and broadcast applications.

Whether you’re replacing a component in legacy equipment or specifying parts for a new installation, we can help you find a design that meets your operating requirements.

Our technical team is available to assist with product selection, compatibility questions, and specialized requirements.

See Products
Waveguide coupler with diagram.
HVD 1005 High Voltage Diode Board
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HVD 1000-3 High Voltage Diode Board
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Machlett Microwave High Voltage Transformer
Machlett Microwave High Voltage Transformer
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CWM-100 100 kW L-Band CW Magnetron Tube
CWM-100 100 kW L-Band CW Magnetron Tube
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Waveguide Circulator - 915 MHz, 75 kW, UHF Band
Waveguide Circulator - 915 MHz, 75 kW, UHF Band
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CWM-75kW L-Band CW Magnetron Tube
CWM-75kW L-Band CW Magnetron Tube
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Waveguide Coupler Types and Configurations

We offer different waveguide coupler configurations to accommodate various frequency bands, power requirements, and installation needs. Our selection includes:

  • Standard waveguide couplers: Conventional designs for general RF signal coupling applications.
  • High-power waveguide couplers: Built for applications requiring greater power-handling capacity.
  • Couplers with integrated terminators: Combine coupling and termination functions within one assembly. 
  • Variable coupling designs: Allow adjustments to coupling levels based on system requirements.
  • Compact form-factor couplers: Designed for installations where available space is limited.

We also offer specialized configurations for applications with more demanding performance requirements. Our team can help you identify the right component for your system.

Waveguide Directional Coupler Designs for RF Applications

A waveguide directional coupler samples a portion of an RF signal while allowing most of the power to continue through the main waveguide. Our microwave couplers support power monitoring, signal testing, and other applications requiring controlled signal sampling.

Our selection includes:

  • Broadband couplers: Provide signal coupling across a wider frequency range. 
  • Multi-hole directional couplers: Use multiple coupling apertures to improve directional performance.
  • High-directivity couplers: Help distinguish forward-traveling signals from reflected signals.
  • Dual-directional couplers: Allow sampling of forward and reflected power.
  • Cross-guide couplers: Use perpendicular waveguide sections to sample microwave energy.

We offer low-VSWR designs to help minimize signal reflections within RF systems.

Questions About Our Waveguide Coupling Products?

If you’re unsure if we have the waveguide coupler you need, please contact us now to find out. Our technical team can help guide you to the right part or custom solution for your project.

For more information on related technologies, explore our waveguide transitions, waveguide circulator, microwave generator, and our full RF and microwave products lineup.

Frequently Asked Questions

A waveguide directional coupler is a passive RF component that samples microwave energy traveling in a particular direction. Unlike a conventional power splitter, its directional properties help distinguish signals traveling in opposite directions.

Directional microwave couplers help technicians measure transmitted and reflected RF power, identify impedance mismatches, and monitor system performance without interrupting the main signal path.

The coupling factor indicates how much signal power is sampled from the main waveguide, expressed in decibels (dB). A 20 dB coupling factor, for example, corresponds to approximately 1% of the incident power.

Key specifications include operating frequency, waveguide size, flange type, power rating, coupling factor, and directivity. These help determine compatibility with your RF system.

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