Input Flange: Frequency Range 1-40 GHz, VSWR <1.15:1

Q: What is the difference between input and output flanges in waveguide systems?

Input flanges are specifically designed for signal entry points with optimized impedance matching for incoming signals, while output flanges may have different configurations for signal transmission to antennas or other systems. Both require precise alignment but may have different sealing requirements.

Q: How do I select the right input flange for my waveguide application?

Consider frequency range, waveguide size (WR number), power handling requirements, environmental conditions, and mating component specifications. Always verify impedance matching and VSWR specifications for your specific frequency band.

Component Specifications

Definition

An input flange is a precision-engineered mechanical interface component designed to connect external transmission lines or antennas to waveguide systems. It ensures proper impedance matching, minimizes signal reflection, and maintains the structural integrity of the waveguide assembly while providing environmental sealing against moisture, dust, and electromagnetic interference.

Working Principle

The input flange operates by creating a mechanically stable and electrically continuous junction between the waveguide and external components. It uses precisely machined mating surfaces with alignment pins/slots to ensure accurate positioning, while conductive gaskets or choke grooves provide RF sealing to prevent signal leakage and maintain waveguide mode purity.

Materials

Aluminum alloy (6061-T6, 7075-T6), brass (C36000), stainless steel (304, 316), with silver or gold plating for enhanced conductivity. Dielectric materials: PTFE or ceramic for insulating components.

Technical Parameters

Parameter	Typical range	Notes & selection driver
VSWR	<1.15:1
Flange Type	WR-284, WR-137, WR-90 (standard waveguide sizes)
Insertion Loss	<0.1 dB
Mounting Holes	4-8 holes with M3-M6 threads
Surface Finish	Ra < 0.8 μm
Frequency Range	1-40 GHz
Plating Thickness	Silver: 5-10 μm, Gold: 1-3 μm

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

Standards

ISO 9001, IEC 60153, MIL-F-3922

Parent Products

This component is used in the following industrial products

Waveguide

A hollow metallic structure that guides electromagnetic waves from the feedhorn to the LNB's internal circuitry with minimal signal loss.

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Engineering Analysis

Risks & Mitigation

Improper alignment causing signal reflection
Corrosion in humid environments
Mechanical stress from thermal expansion
Gasket degradation over time

FMEA Triads

Trigger: Incorrect torque application during installation
Failure: RF leakage and impedance mismatch
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications

Trigger: Corrosion due to environmental exposure
Failure: Increased insertion loss and potential arcing
Mitigation: Apply protective coatings and use corrosion-resistant materials

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm for critical dimensions, ±0.1° for angular alignment

Test Method

Vector network analyzer (VNA) testing for S-parameters, helium leak testing for sealing, coordinate measuring machine (CMM) for dimensional verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Input Flange

Manufacturer profiles associated with Input Flange.

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Frequently Asked Questions

What is the difference between input and output flanges in waveguide systems?