SGS San Diego

SGS, a leading global provider of verification, testing and certification services, has collaborated with ETS‑Lindgren, a leader in test and measurement solutions, on dozens of acoustic, EMC and wireless test and measurement chambers at SGS facilities worldwide. When SGS in San Diego was ready to expand their test lab services to include testing of wireless devices, they turned to the experts at ETS‑Lindgren. Known for several “industry firsts”, including the world’s first CTIA Authorized Test Lab (CATL), SGS knew they had a long-time partner they could trust to ensure the new service offering would attract customers. This partnership between SGS San Diego and ETS‑Lindgren has continued since that first chamber installation with modifications to add new wireless test capabilities and more!

ETS‑Lindgren provided an Antenna Measurement System, Model AMS-8923-195, for radiated wireless antenna measurements with test packages to support Cellular, Wi-Fi, A-GPS, LTESISO (FDD/TDD), and MIMO OTA Testing Capabilities. A subsequent addition to this chamber included installation of an LTE-A test system. ETS‑Lindgren designed the chamber to easily install additional test protocols as needed in the future. This provides SGS with the flexibility to meet the growing needs of its customers.

Antenna Measurement System Chamber Overview

• The ETS- Lindgren Series 81 shielded enclosure provided consists of shielded modular panel sections assembled with a clamping system into a self-supported enclosure.
• The chamber is lined with ETS‑Lindgren polyurethane absorber. A unique twostep impregnation process maximizes carbon distribution uniformity results in higher performance and improved fire resistance. While ammonium based compounds are highly hygroscopic, ETS‑Lindgren utilizes a non-hygroscopic, moisture-resistant substrate. FlexSorb™ coating creates durable absorber tips that resist breakage.
• A High-Speed Switch Matrix provides all switching and control necessary for high-speed RF signal routing to the array of dual-polarized antennas. Each antenna polarization is connected to one of two banks of multiple SMA connectors. Multi Antenna Array and Controller Overview
• Aluminum truss multi-antenna array houses 23 dual-polarized measurement antennas spaced every 15º between black anechoic absorber material.
• Low dielectric materials provide continuous rotation along the phi axis with minimized reflections.
• Each antenna is surrounded by a pyramidal absorber configuration with wedge absorber fillers on either side, providing flexibility to relocate antennas.
• A high-speed switch control box integrated on the array structure provides fast switching between antennas for accelerated testing.

About ETS‑Lindgren

ETS‑Lindgren is an international manufacturer of components and systems that measure, shield, and control electromagnetic and acoustic energy. The company’s products are used for electromagnetic compatibility (EMC), microwave and wireless testing, electromagnetic field (EMF) measurement, radio frequency (RF) personal safety monitoring, magnetic resonance imaging (MRI), and control of acoustic environments.

Headquartered in Cedar Park, Texas, ETS‑Lindgren has manufacturing facilities in North America, Europe, and Asia. Additional information about ETS‑Lindgren is available at www.ets-lindgren.com. Additional information about ETS‑Lindgren’s parent company ESCO and its subsidiaries is available at www.escotechnologies.com.