Feedhorn Component for Satellite LNB | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Feedhorn

Definition

The feedhorn is a critical component of a Low-Noise Block Downconverter (LNB) assembly. It is a flared, horn-shaped antenna structure that sits at the focal point of a parabolic satellite dish. Its primary function is to efficiently collect the reflected microwave signals from the dish's surface and funnel them into the waveguide that leads to the LNB's low-noise amplifier. It is designed to match the impedance of free space to the waveguide, maximizing signal capture and minimizing losses and noise ingress. The feedhorn is typically manufactured from aluminum, brass, or stainless steel, with aluminum alloy 6061-T6 being a common material for corrosion resistance. Key parameters include an operating frequency range of 10.7–12.75 GHz for Ku-band reception, a return loss of at least 20 dB, cross-polarization discrimination of at least 30 dB, a VSWR of 1.25 or less, and an operating temperature range of -40 to 85 °C. The surface finish is specified as ≤0.8 μm Ra to ensure low loss. The flange interface is typically WR-75, conforming to IEC 60154. The feedhorn's length ranges from 100 to 200 mm, and its weight from 0.5 to 1.5 kg. These values are reference ranges for directory purposes; actual specifications must be confirmed with the legal manufacturer or supplier for the specific model and application. The feedhorn is a passive component and does not contain active electronics. It is designed for outdoor exposure and must be properly sealed to prevent moisture ingress. Regular inspection for physical damage, corrosion, or misalignment is recommended to maintain signal integrity.

Working Principle

The feedhorn operates on the principle of electromagnetic wave guidance. The parabolic dish reflector focuses incoming satellite signals to a point. The feedhorn, positioned at this focal point, captures these concentrated waves. Its flared shape acts as a transition between the open space and the narrower waveguide, efficiently coupling the radio frequency energy into the waveguide with minimal reflection and spillover loss, ensuring the signal is delivered to the LNB's receiver probes for processing. The impedance matching between free space and the waveguide is critical to minimize signal loss and maximize the signal-to-noise ratio.

Common Materials

Aluminum, Brass, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Operating Frequency	10.7–12.75 GHz	Covers Ku-band satellite reception
Return Loss	≥20 dB	Ensures minimal signal reflection
Cross-Polarization Discrimination	≥30 dB	Maintains signal purity
VSWR	≤1.25	Impedance match quality
Operating Temperature	-40–85 °C	Survives outdoor exposure
Material	6061-T6	Aluminum alloy for corrosion resistanceASTM B221
Surface Finish	≤0.8 μm Ra	Critical for low loss
Flange Interface	WR-75	Standard waveguide flangeIEC 60154
Weight	0.5–1.5 kg	Lightweight for mounting
Length	100–200 mm	Affects focal length matching

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

Scalar Ring
A corrugated ring surrounding the feedhorn aperture to improve illumination efficiency and reduce side-lobe interference by controlling the radiation pattern.

Material: Aluminum
Waveguide Transition
The section that connects the flared horn to the standard rectangular or circular waveguide, ensuring smooth impedance matching.

Material: Brass or Aluminum
Mounting Flange Part
Provides the mechanical interface for securely attaching the feedhorn to the LNB or support arm.

Material: Stainless Steel or Aluminum

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Feedhorn.

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 Feedhorn

Manufacturer profiles associated with Feedhorn.

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Frequently Asked Questions

What is the primary function of a feedhorn?

The feedhorn collects microwave signals reflected by a satellite dish and directs them into the LNB's waveguide for amplification and processing.

What materials are commonly used for feedhorns?

Common materials include aluminum, brass, and stainless steel. Aluminum alloy 6061-T6 is often specified for corrosion resistance, but the actual material grade must be confirmed with the supplier.

What is the typical operating frequency range for this feedhorn?

The listed reference range is 10.7–12.75 GHz, covering Ku-band satellite reception. Confirm the exact frequency range for your specific model and application.

How should I verify the specifications of a feedhorn?

Always consult the legal manufacturer or supplier for the specific model's datasheet. The values in this directory are reference ranges and must be confirmed before procurement or installation.

Data Basis

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

Preliminary Technical Classification

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pressure:	Atmospheric pressure only (non-pressurized component)
other spec:	Frequency range: 3.4-4.2 GHz (C-band), 10.7-12.75 GHz (Ku-band), VSWR <1.25:1, Insertion loss <0.2 dB
temperature:	-40°C to +80°C (operational), -55°C to +100°C (storage)

Feedhorn

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

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Compliance & Manufacturing Standards