Waveguide Component for LNB | Specifications & Selection Guide

Product Specifications

Technical details and manufacturing context for Waveguide

Definition

In a Low-Noise Block Downconverter (LNB), the waveguide is a critical passive component that forms the initial signal path. It is a precisely engineered, hollow metal tube (typically rectangular or circular in cross-section) that channels the collected microwave signals from the satellite dish's feedhorn into the LNB's internal cavity where the low-noise amplifier and downconverter are located. Its primary function is to efficiently transfer the high-frequency signal while maintaining its integrity and preventing external interference.

The waveguide is manufactured from materials such as aluminum alloy, brass, or galvanized steel, with the aluminum alloy 6061-T6 specified in the reference data. The inner dimensions are typically 19.05 mm × 9.52 mm (WR-75 standard), and the length can be customized from 50 to 200 mm. The flange type is CPR75G per IEC 60154, ensuring a grooved connection. The surface finish is specified as ≤0.8 μm Ra to reduce signal loss. The weight ranges from 50 to 150 g depending on length and material.

Key electrical parameters include a frequency range of 10.7–12.75 GHz for Ku-band reception, insertion loss ≤0.1 dB, return loss ≥20 dB, and cross-polarization discrimination ≥30 dB. The operating temperature range is -40 to 85°C. These values are reference ranges and must be verified for the specific model and application.

As a passive component, the waveguide does not amplify or process signals; it only guides them. It is essential for maintaining signal quality in satellite reception systems. When selecting a waveguide, verify the frequency range, dimensions, flange type, and material compatibility with your LNB and feedhorn. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The waveguide operates by confining electromagnetic waves within its conductive walls through total internal reflection. The dimensions of the waveguide's cross-section are designed to be comparable to the wavelength of the incoming signal, allowing only specific propagation modes. This controlled environment minimizes signal attenuation, dispersion, and radiation loss as the waves travel from the feedhorn interface to the probe or coupling element that injects the signal into the amplifier stage.

Common Materials

Aluminum alloy, Brass, Galvanized steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Frequency Range	10.7–12.75 GHz	Ku-band satellite reception
Insertion Loss	≤0.1 dB	Lower is better for signal quality
Return Loss	≥20 dB	Ensures minimal reflection
Cross-Polarization Discrimination	≥30 dB	Important for dual-polarization systems
Operating Temperature	-40–85 °C	Outdoor installation range
Material	6061-T6	Aluminum alloy for lightweight and corrosion resistanceASTM B221
Surface Finish	≤0.8 μm Ra	Smooth surface reduces signal loss
Inner Dimensions	19.05×9.52 mm	Standard WR-75 waveguide size
Length	50–200 mm	Customizable per application
Flange Type	CPR75G	Grooved flange for secure connectionIEC 60154
Weight	50–150 g	Depends on length and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Waveguide Body Part
The main hollow tube that guides the electromagnetic waves.

Material: Aluminum alloy
Input Flange Part
Precision-machined interface for mounting and sealing to the feedhorn.

Material: Brass or aluminum
Probe Coupling Window Part
Aperture or dielectric window that allows the signal to couple from the waveguide to the internal probe of the LNB.

Material: PTFE (Teflon) or ceramic

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Waveguide.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Low-Noise Block Downconverter (LNB)

View system integration details

Manufacturers of Waveguide

Manufacturer profiles associated with Waveguide.

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Frequently Asked Questions

What is the typical frequency range for this waveguide?

The reference data specifies a frequency range of 10.7–12.75 GHz, which is suitable for Ku-band satellite reception. However, you should verify the exact range for your specific model and application with the manufacturer.

What materials are available for the waveguide?

The materials on file include aluminum alloy, brass, and galvanized steel. The aluminum alloy 6061-T6 is listed as a reference material, but other options may be available. Confirm material suitability with the supplier.

What are the inner dimensions of the waveguide?

The reference inner dimensions are 19.05 mm × 9.52 mm, corresponding to the WR-75 standard. However, dimensions may vary depending on the application, so always check the product specifications.

How do I ensure the waveguide meets my requirements?

Verify key parameters such as frequency range, insertion loss, return loss, cross-polarization discrimination, operating temperature, and flange type with the manufacturer. Also confirm the material, surface finish, and dimensions for your specific setup.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 1.5 bar
other spec:	Frequency Range: 10.7-12.75 GHz, VSWR: <1.25:1, Insertion Loss: <0.5 dB
temperature:	-40°C to +85°C

Waveguide

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards