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Fast, accurate OTA measurements across your workflow
Keysight compact antenna test range (CATR) OTA test chambers deliver highly repeatable OTA measurements from sub-6 GHz to mmWave frequencies in compact, integrated enclosures. Designed for 5G, 6G, and satellite communication device testing, these turnkey chambers combine precision reflector technology, wide angular coverage, and low-reflection environments to enable consistent, standards-compliant results, without the footprint of a full anechoic chamber. Whether you're performing R&D, conformance, or production testing, Keysight CATR chambers support high dynamic range, fast switching, and automated test control to accelerate your device evaluation with confidence. Need help selecting? Check out the resources below.
Increase test throughput
Accelerate measurements with high-speed switching, automation support, and efficient OTA workflows to reduce overall test time.
Spatial accuracy
Achieve precise far-field conditions using precision reflectors and absorbers that create uniform quiet zones with minimal reflections.
Frequency coverage
Validate devices across sub-6 GHz, FR1, and mmWave FR2 bands using wideband feeds and optimized chamber designs for reliable performance.
Measurement repeatability
Ensure consistent results with low-reflection environments and stable mechanical configurations that minimize test variability.
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Maximum angles of arrival
1 to 2
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Frequency range
24 GHz to 42 GHz, 24 GHz to 55 GHz, 17 GHz to 30 GHz, 24 GHz to 43.5 GHz, 60 GHz to 90 GHz
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Measurement type
Indirect far field (IFF)
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Maximum DUT weight
10 kg to 10 kg (UE)|40 kg (gNB)
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Use cases
RF / demodulation / RRM 1AoA verification and acceptance, Antenna measurement, FR2 UE RF in-band only verification, FR2 UE RRM 1AoA verification, Radar manufacturing, Radar design and verification, NTN RF verification, FR2 gNodeB
Most popular configurations
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Frequently asked questions
A Compact Antenna Test Range, often shortened to CATR, is a specialized type of anechoic chamber designed to create a plane-wave test environment in a compact space. In free space, a device under test should ideally be evaluated at distances where the spherical wavefront emitted by the antenna has flattened into a plane wave. However, reaching that distance in a traditional far-field setup requires very large chambers, which can be impractical for high-frequency testing.
A CATR chamber solves this problem by using a large precision reflector that reshapes the spherical waves from a feed antenna into a uniform plane wave within a defined quiet zone. Inside this zone, the device under test experiences the same conditions as it would in the far field, but within a much smaller physical footprint. This approach reduces facility size, cost, and complexity while still allowing accurate characterization of antennas and wireless devices across a wide range of frequencies.
Millimeter-wave (mmWave) frequencies used in fifth-generation (5G) and emerging sixth-generation (6G) systems bring new challenges for testing. Antennas become smaller, but their arrays are more complex, often using beamforming and beam steering techniques to achieve high data rates and directional coverage. Because these systems rely on accurate spatial performance, testing must be conducted over the air (OTA) in controlled environments.
CATR chambers are particularly well-suited for this. The compact quiet zone they generate provides a stable and repeatable environment for evaluating mmWave devices without requiring the extremely long distances of direct far-field chambers. This makes it possible to measure radiation patterns, beam accuracy, and throughput under realistic propagation conditions while maintaining manageable chamber dimensions.
For 6G research, where frequencies are expected to extend beyond 100 gigahertz, the precise plane-wave field created in a CATR becomes even more critical. Researchers can validate new antenna designs, phased arrays, and integrated transceiver modules in a way that mirrors the conditions they will encounter in deployment, but within the controlled and repeatable environment of the chamber.