Shielding/Casing: VSWR <1.5:1, Insertion Loss <0.5 dB

Q: Why is shielding important for delay lines?

Delay lines are sensitive to electromagnetic interference which can distort timing signals. Shielding prevents external noise from affecting signal propagation time and amplitude.

Q: What materials provide best EMI shielding for delay lines?

Copper offers superior conductivity (best for magnetic fields), aluminum provides good general shielding with lighter weight, while steel with conductive coatings offers robust physical protection.

Q: How does casing design affect delay line performance?

Proper casing design minimizes parasitic capacitance, provides adequate thermal dissipation, and ensures complete electromagnetic sealing without creating resonance cavities that could affect signal quality.

Component Specifications

Definition

A specialized shielding and casing component designed to protect delay line elements from electromagnetic interference (EMI), radio frequency interference (RFI), and physical damage. It maintains signal integrity by preventing external noise from distorting timing signals while providing mechanical protection and thermal management for sensitive delay circuitry.

Working Principle

Operates on Faraday cage principles to block external electromagnetic fields through conductive materials, while providing physical protection and thermal dissipation. The shielding creates an isolated environment that prevents signal degradation in delay lines by reflecting/absorbing interfering electromagnetic waves.

Materials

Typically aluminum alloys (6061, 5052), copper alloys (C11000), or steel with conductive coatings. May include nickel-plated steel for enhanced shielding effectiveness. Internal linings often use conductive elastomers or EMI gaskets for complete enclosure sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
VSWR	<1.5:1
Dimensions	Custom to delay line specifications
Insertion Loss	<0.5 dB
Surface Finish	Conductive coating with ≤0.5μm roughness
Operating Temperature	-40°C to +85°C
Shielding Effectiveness	40-80 dB @ 1-10 GHz

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 11452-2, IEC 61000-4-3, MIL-STD-461, DIN EN 55032

Parent Products

This component is used in the following industrial products

Delay line

An electronic component that introduces a precise time delay to an electrical signal.

View Product Details

Engineering Analysis

Risks & Mitigation

Inadequate shielding causing signal distortion
Thermal buildup affecting delay accuracy
Mechanical stress damaging internal components
Corrosion reducing shielding effectiveness

FMEA Triads

Trigger: Poor conductive joint design
Failure: EMI leakage through gaps
Mitigation: Implement continuous welding or conductive gaskets at all joints

Trigger: Insufficient thermal design
Failure: Overheating affecting delay characteristics
Mitigation: Add heat sinks, thermal pads, or forced air cooling

Trigger: Material corrosion
Failure: Reduced shielding effectiveness over time
Mitigation: Apply protective coatings or use corrosion-resistant alloys

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1mm dimensional tolerance, shielding effectiveness within ±3dB of specification

Test Method

IEEE 299 for shielding effectiveness, MIL-STD-285 for attenuation, thermal cycling per IEC 60068-2-14

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

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

Manufacturers of Shielding/Casing

Manufacturer profiles associated with Shielding/Casing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

Why is shielding important for delay lines?