Product Summary

The Lenolink ZLR75SKL is a 10–15 GHz WR75 waveguide-to-coaxial adapter designed to provide a low-loss RF transition between a rectangular waveguide and an SMA-K coaxial interface. It is suitable for microwave communication, radar, RF measurement, antenna feed systems and other high-frequency microwave applications.

Key RF specifications include:

• Frequency: 10–15 GHz
• Waveguide: WR75
• Coaxial interface: SMA-F
• Insertion loss: ≤0.2 dB
• VSWR: ≤1.15
• Average power: 100 W

The compact aluminum alloy construction supports reliable mechanical integration into microwave RF systems.

Key Features

• 10–15 GHz operating frequency
• WR75 rectangular waveguide interface
• SMA-K coaxial connector
• Low insertion loss ≤0.2 dB
• Low VSWR ≤1.15
• 100 W average power handling
• Aluminum alloy construction
• Operating temperature: -40°C to +90°C
• Storage temperature: -50°C to +110°C
• Compact microwave RF transition design
• Suitable for professional microwave and RF systems

Technical Advantages

Low Insertion Loss

With an insertion loss of ≤0.2 dB, the ZLR75SKL is designed to minimize RF signal attenuation during the transition between waveguide and coaxial transmission lines.

Low insertion loss is particularly important in microwave systems where RF link budget and signal integrity are critical.

Excellent VSWR Performance

The adapter provides a specified VSWR of ≤1.15, helping minimize reflections at the waveguide-to-coaxial interface.

This makes the product suitable for microwave measurement, communication and RF subsystem applications requiring good impedance matching.

WR75 Waveguide Interface

The ZLR75SKL features a WR75 rectangular waveguide interface with a BJ120 flange configuration and four Φ4 mounting holes. The WR75 interface is designed for microwave applications operating within the specified 10–15 GHz frequency range.

SMA-F Coaxial Interface

The coaxial side uses an SMA-F connector, providing a convenient interface to compatible RF cables, microwave modules and test equipment.

100 W Average Power Handling

The ZLR75SKL supports an average power rating of 100 W, providing a suitable RF interface for applications requiring relatively high microwave power handling.

Actual power capability may depend on frequency, duty cycle, ambient conditions and system configuration.

Wide Operating Temperature Range

The adapter supports an operating temperature range of: -40°C to +90°C

This allows integration into a variety of indoor, outdoor and industrial microwave systems.

Technical Specifications

ZLR75SKL Waveguide to Coaxial Adapter Specifications

Parameter	Specification
Model	ZLR75SKL
Frequency Range	10–15 GHz
Waveguide Type	WR75
Waveguide Flange	BJ120 / Φ4 mounting holes*
Coaxial Port	SMA-F
Insertion Loss	≤0.2 dB
VSWR	≤1.15
Average Power	100 W
Material	Aluminum Alloy
Surface Finish	Black Matte
Operating Temperature	-40°C to +90°C
Storage Temperature	-50°C to +110°C

Mechanical Specifications

Mechanical Design

• Waveguide interface: WR75
• Waveguide flange: Φ4 mounting holes
• Coaxial connector: SMA-K
• Housing material: Aluminum alloy
• Surface finish: Black matte
• Compact mechanical structure

Mechanical Drawing of ZLR75SKL WR75 Waveguide-to-Coaxial Adapter

Waveguide-to-Coaxial Adapter Working Principle

How Does a Waveguide-to-Coaxial Adapter Work?

A waveguide-to-coaxial adapter provides an RF transition between a rectangular waveguide transmission line and a coaxial transmission line.

The waveguide side carries microwave signals through the WR75 structure, while the SMA coaxial interface allows connection to RF cables, microwave modules or test instruments.

The adapter is designed to maintain good impedance matching and low RF loss across the specified 10–15 GHz frequency range.

Why Choose Lenolink Waveguide-to-Coaxial Adapter?

Professional RF & Microwave Component Manufacturer

Lenolink provides RF and microwave components for telecom, wireless infrastructure, microwave communication, radar, RF testing and other high-frequency applications.

Our product portfolio can include:

• Waveguide components
• Waveguide-to-coaxial adapters
• RF filters
• RF combiners
• Duplexers
• Hybrid couplers
• RF dummy loads
• DAS passive components
• Customized RF components

Low-Loss Microwave Design

The ZLR75SKL provides insertion loss of ≤0.2 dB, helping minimize RF signal attenuation at the waveguide-to-coaxial interface.

High-Quality RF Matching

With VSWR ≤1.15, the adapter provides good impedance matching and helps reduce reflected RF power.

Custom RF & Microwave Solutions

For different microwave system requirements, Lenolink can evaluate customized solutions involving:

• Frequency range
• Waveguide type
• Coaxial connector
• Flange configuration
• Power handling
• Mechanical dimensions
• Surface finish
• Mounting structure

Waveguide-to-Coaxial RF Transition

The ZLR75SKL provides a mechanical and electrical transition between a WR75 rectangular waveguide transmission path and an SMA coaxial RF interface. This allows microwave equipment using waveguide transmission lines to connect with coaxial RF components, measurement equipment and microwave modules.

Microwave Interface Solutions

Lenolink can support microwave interface requirements involving waveguide types, coaxial connectors, flange configurations, frequency ranges and mechanical structures.

Frequently Asked Questions

Q1: What is a waveguide-to-coaxial adapter?

A waveguide-to-coaxial adapter is a passive microwave component used to transition RF signals between a rectangular waveguide transmission line and a coaxial RF interface.

Q2: What frequency range does the ZLR75SKL support?

The ZLR75SKL is specified for operation from 10 to 15 GHz.

Q3: What waveguide type is used?

The product specification identifies the waveguide interface as WR75.

Q4: What coaxial connector does the adapter use?

The ZLR75SKL uses an SMA-F coaxial connector.

Q5: What is the insertion loss?

The specified insertion loss is ≤0.2 dB.

Q6: What is the VSWR of the ZLR75SKL?

The specified VSWR is ≤1.15 across the specified operating frequency range.

Q7: What is the power handling capability?

The specified average power handling capability is 100 W.

Actual power handling may depend on operating frequency, duty cycle, ambient temperature and installation conditions.

Q8: What applications use waveguide-to-coaxial adapters?

Waveguide-to-coaxial adapters are commonly used in:

• Microwave communication
• Radar
• RF testing
• Microwave measurement
• Antenna systems
• RF modules
• Waveguide transmission systems

Q9: Can Lenolink customize waveguide components?

Yes. Lenolink can evaluate customized waveguide-to-coaxial adapters based on frequency range, waveguide type, coaxial connector, flange configuration, power handling and mechanical requirements.

Q10: Can Lenolink provide RF engineering support?

Yes. Lenolink can support RF component selection and customization based on the customer’s frequency, interface, power and mechanical requirements.

Q11: What is WR75 waveguide?

WR75 is a standardized rectangular waveguide size commonly used for microwave applications in the approximately 10–15 GHz frequency range. The ZLR75SKL is designed specifically for WR75 waveguide systems.

Q12: What is the difference between a waveguide-to-coaxial adapter and a waveguide filter?

A waveguide-to-coaxial adapter is used to transition RF signals between a waveguide and a coaxial interface, while a waveguide filter is designed to selectively pass or reject specific frequency ranges. The ZLR75SKL is a waveguide-to-coaxial adapter, not a waveguide filter.

Q13: Is the ZLR75SKL a WR75 to SMA adapter?

Yes. The ZLR75SKL is a WR75 waveguide-to-SMA coaxial adapter designed to provide an RF transition between a WR75 rectangular waveguide and an SMA-K coaxial interface over the 10–15 GHz frequency range.

Request Waveguide-to-Coaxial Adapter Solution

Looking for a customized waveguide-to-coaxial adapter?

Please provide:
✓ Required frequency range
✓ Waveguide type
✓ Coaxial connector type
✓ Flange configuration
✓ Power handling requirement
✓ Mechanical requirements

Our RF engineers will provide a customized microwave adapter solution.

Contact: info@lenolink.com