Shielding Enclosure for EMI/RFI Protection

Product Specifications

Technical details and manufacturing context for Shielding Enclosure

Definition

In a Low-Noise Amplifier (LNA), the shielding enclosure is a critical component that surrounds the amplifier's sensitive circuitry. Its primary function is to create a Faraday cage effect, preventing external electromagnetic fields from coupling into the amplifier's input stage, which would degrade the signal-to-noise ratio and introduce unwanted noise. Conversely, it also contains electromagnetic emissions from the LNA itself, preventing them from interfering with nearby electronic equipment. The enclosure is constructed from conductive materials (typically metals) to form a continuous, grounded barrier. This barrier reflects and/or absorbs incoming electromagnetic waves, preventing their penetration. The effectiveness relies on the material's conductivity, thickness, and the integrity of seams and openings, which are minimized or specially treated (e.g., with conductive gaskets) to maintain the shield's continuity. Typical materials include aluminum alloy, copper alloy, and nickel-plated steel. Key parameters include shielding effectiveness (60–120 dB at 1 GHz per IEC 61000-5-7), frequency range (0.01–18 GHz), material (SPCC per GB/T 11253), material thickness (1.0–2.0 mm per GB/T 708), surface treatment (Zn 8–12 μm per ASTM B633), IP rating (IP54–IP65 per IEC 60529), operating temperature (-40–85 °C per IEC 60068-2-1), dimensional tolerance (±0.1 mm per ISO 2768-m), weight (0.5–5.0 kg), size (100×100×50 to 600×600×300 mm), conductivity (≥1×10^6 S/m per ASTM B193), and corrosion resistance (≥72 h salt spray per ASTM B117). These values are reference ranges; verify model-specific specifications with the manufacturer. The enclosure is used in applications requiring EMI/RFI protection, such as in LNA modules for communication systems. Selection inputs include required shielding effectiveness, frequency range, environmental conditions, and mounting constraints. Interfaces include input/output connectors, grounding points, and mounting holes. Verification questions: Does the enclosure meet the required shielding effectiveness? Are all seams and openings properly sealed? Is the grounding connection adequate? Maintenance signals: inspect for corrosion, damage to gaskets, or loose grounding. Failure boundaries: if the enclosure is not properly grounded or has gaps, shielding effectiveness is compromised, leading to performance degradation.

Working Principle

The enclosure is constructed from conductive materials (typically metals) to form a continuous, grounded barrier. This barrier reflects and/or absorbs incoming electromagnetic waves, preventing their penetration. The effectiveness relies on the material's conductivity, thickness, and the integrity of seams and openings, which are minimized or specially treated (e.g., with conductive gaskets) to maintain the shield's continuity.

Common Materials

Aluminum alloy, Copper alloy, Nickel-plated steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Shielding Effectiveness	60–120 dB	At 1 GHz, typical for commercial enclosuresIEC 61000-5-7
Frequency Range	0.01–18 GHz	Covers most EMI/RFI applications
Material	SPCC	Cold-rolled steel; optional galvanized or stainlessGB/T 11253
Material Thickness	1.0–2.0 mm	Thicker for higher rigidity and shieldingGB/T 708
Surface Treatment	Zn 8–12 μm	Zinc plating; optional powder coatingASTM B633
IP Rating	IP54–IP65	Dust-tight and water-resistantIEC 60529
Operating Temperature	-40–85 °C	Extended range for industrial useIEC 60068-2-1
Tolerance (Dimensions)	±0.1 mm	For critical mounting pointsISO 2768-m
Weight	0.5–5.0 kg	Depends on size and material
Size (L×W×H)	100×100×50–600×600×300 mm	Custom sizes available
Conductivity	≥1×10^6 S/m	For effective groundingASTM B193
Corrosion Resistance	≥72 h	Salt spray test per standardASTM B117

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

Enclosure Body Part
Forms the main conductive barrier and structural frame.

Material: Aluminum alloy
Cover/Lid Part
Provides access to internal components while maintaining shield integrity when closed.

Material: Aluminum alloy
Conductive Gasket Part
Seals the gap between the body and cover to ensure electrical continuity across the seam.

Material: Silicone with embedded metal particles
Feedthrough Filter
Allows power and signal cables to pass through the enclosure while filtering out high-frequency noise.

Material: Ceramic capacitor elements in a metal housing
Grounding Lug Part
Provides a secure, low-impedance connection point to the system ground plane.

Material: Copper

Applied To / Applications

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

Low-Noise Amplifier

View system integration details

Test Fixture / DUT Interface

View system integration details

Manufacturers of Shielding Enclosure

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Tongcrx Company

Shenzhen, Guangdong, CN

Also makes: Precision Machined Components

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “RF Shielding Enclosure”
View source page ↗ tongcrx.com · checked 2026-09-14

View profile Send enquiry

Wuxi Anxin Shielding Equipment Co., Ltd.

Wuxi, Jiangsu, CN

Also makes: EMI Filter, Modular Shielded Enclosure

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Electromagnetic Shielding Enclosure”
View source page ↗ anxinshielding.com · checked 2026-09-03

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 · Page last updated 16 September 2026

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Frequently Asked Questions

What is the primary function of a shielding enclosure?

The primary function is to isolate electronic components from electromagnetic interference (EMI) and radio frequency interference (RFI) by creating a Faraday cage effect, preventing external fields from coupling into sensitive circuitry and containing emissions from the device.

What materials are commonly used for shielding enclosures?

Common materials include aluminum alloy, copper alloy, and nickel-plated steel. These conductive materials provide the necessary shielding effectiveness.

How do I verify the shielding effectiveness of an enclosure?

Check the shielding effectiveness rating (e.g., 60–120 dB at 1 GHz per IEC 61000-5-7) and ensure it meets your application requirements. Also verify the integrity of seams and openings, and proper grounding.

What are typical applications for shielding enclosures?

They are used in low-noise amplifiers (LNAs), communication systems, and any electronic equipment requiring protection from EMI/RFI to maintain signal integrity and prevent interference.

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:	EMI/RFI shielding effectiveness: 60-100 dB (depending on frequency)
temperature:	-40°C to +85°C

Shielding Enclosure

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards