High-Frequency VSWR Testing: Free Space Chamber Validation (up to 100 GHz)

Don’t settle for testing that adds complexity and risk to your schedule. Shielding Integrity Services (SIS) delivers expert, fully accredited, independent High-Frequency VSWR Testing based on decades of practical, hands-on experience—not just theory. We use state-of-the-art automated systems that maximize testing efficiency, ensuring fast turnaround of accurate data and quick troubleshooting for any required performance adjustments. Whether validating a compact 3-meter setup or a specialized 10-meter facility anywhere in the world, SIS delivers the precise, compliant results you need to confidently move your projects forward.

Test Objectives & Technical Necessity

The VSWR Free Space test is designed to detect and measure reflected radio waves indirectly entering the chamber’s quiet zone from the source antenna. This is a highly stringent test used to verify specified chamber performance and detect absorber design limitations.

Technical Specifications

SIS has conducted this type of anechoic performance measurement at numerous facilities worldwide, validating performance across wide, critical frequency bands.

• Frequency Range: Standard capabilities include measurements from 500 MHz through 100 GHz.
• Test Goal: Verification of chamber performance where traditional free-space methods are not practical.

High-Frequency Methodology & Data Integrity

We leverage advanced, proprietary equipment and software to ensure maximum data accuracy and repeatability for high-frequency measurements.

Automated Measurement System

• Our quiet zone measurement systems consist of a two-axis track and rotary table, which automatically captures a repeatable series of RF reflectivity measurements.
• The data is captured using a spectrum analyzer or network analyzer and stored to a portable computer for processing and analysis using proprietary software.
• We achieve an exceptional measurement and analysis resolution of 0.01 dB (typical).

Standards & Performance Validation

This measurement verifies compliance with the industry’s most trusted international standards for anechoic performance, giving you confidence in your data.

• Primary Standard: The standard method for measuring anechoic performance is described in IEEE Standard 149-2021.
• Supported Documents: We also support variations described in and supported by documents such as University of Michigan Report 5391-1-F and ETSI 300 328-1 V1.7.1.