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New MIMO Wireless Test System Simplifies a Complex Test

CEDAR PARK, Texas, August 24, 2010 – ETS-Lindgren announced the availability of the Model AMS-8700 RF Environment Simulator; a turnkey MIMO OTA test system that allows repeatable measurement of radiated performance of wireless devices in a simulated multi-path environment. The simulated RF environment is ideal for the evaluation of downlink MIMO performance of emerging wireless technologies such as LTE, WiMAX, IEEE 802.11n, and Wi-Fi, as well as receive diversity performance of existing wireless technologies. Using patent pending technology, the system consists of a dual polarized antenna array in an absorber lined fully-anechoic chamber connected to technology specific communication test equipment through a spatial channel emulator.

“We designed this MIMO OTA test system to simulate a wide range of real-world RF environments,” said Dr. Michael D. Foegelle, Director of Technology Development for ETS-Lindgren. “Traditional OTA tests use antenna pattern measurement techniques in an anechoic environment, under the assumption that wireless devices transmit and receive with a static radiation pattern. However, modern wireless devices can vary their radiation pattern as a function of the environment making performance evaluation difficult. MIMO performance is a function of the transmitter, receiver, and the RF environment in between. With the AMS-8700, the OTA performance of multi-antenna wireless receivers can be readily evaluated using a variety of standard and customizable spatial channel models,” added Dr. Foegelle.

The Model AMS-8700 provides a highly reliable, simple solution to a complex test allowing wireless device manufacturers to easily verify the performance of their products and be confident when a product goes to market. This solution offers engineers the flexibility to test different product designs in house to quickly evaluate tradeoffs in cost versus performance of a wireless device.

Other key features of Model AMS-8700 include the capability of supporting single cluster, multiple cluster, and uniform models as well as variable angles of arrival, Doppler, and delay spreads to emulate the scattering effect of fixed and moving objects within the simulated environment. A variety of data throughput based performance metrics can be evaluated using the EMQ-108 MIMO Test Suite option with ETS-Lindgren’s popular EMQuest EMQ-100 Antenna Measurement Software.

The standard system configuration includes the RF shielded chamber and high performance anechoic absorber test environment as well as measurement equipment such as antennas and MIMO antenna structure, power amplifier, multiple access positioning system (MAPS) with laptop mount kit, free space mount kit for mobile phone testing, five beam laser and CTIA Ripple Calibration Antenna and RF-Cable Kits. Several optional accessories are also available including a 16-antenna array upgrade, SAM mounting kits, and precision sleeve dipoles, to name a few. With every Model AMS-8700, ETS-Lindgren provides a shielding verification test report, integration and initial calibration of the test system components and training of the customer’s lab personnel on performing MIMO testing.

The new Model AMS-8700 continues the tradition of ETS-Lindgren in the design and manufacture of innovative wireless test systems. In 2002, ETS-Lindgren designed and installed the industry’s first CTIA Authorized Test Lab (CATL). Today, over 75% of all CATL’s worldwide are equipped with wireless test systems manufactured by ETS-Lindgren. The company maintains its leadership position through active participation in the industry standards committees that drive the performance testing of wireless devices, such as CTIA - The Wireless Association®, the WiMAX Forum® and 3GPP. Model AMS-8700 is the latest innovative test solution from ETS-Lindgren’s veteran team of wireless engineering specialists.

For complete information, please visit MIMO Wireless Test System, MIMO Video, and Introduction to MIMO Testing Webinar. An educational MIMO article, “Creating a Complex Multipath Environment Simulation in an Anechoic Chamber,” is also available.

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, wireless and Magnetic Resonance Imaging (MRI) testing, electromagnetic field (EMF) measurement, radio frequency (RF) personal safety monitoring, and control of acoustic environments.

Headquartered in Cedar Park, Texas, ETS-Lindgren has manufacturing facilities in North America, Europe and Asia. The company is a wholly owned subsidiary of ESCO Technologies, a leading supplier of engineered products for growing industrial and commercial markets. ESCO is a New York Stock Exchange listed company (symbol ESE) with headquarters in St. Louis, Missouri. Additional information about ETS-Lindgren is available at Additional information about ESCO and its subsidiaries is available at

Janet O'Neil
Sales & Marketing

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Information presented is subject to change as product enhancements are made. Contact ETS-Lindgren Sales Department for current specification.