Simulate OTA channels for 5G mmWave signals

-November 06, 2017

The development of 5G has spawned a great deal of test issues. Channel sounding tests are ongoing, particularly at the proposed millimeter wave (mmWave) frequencies of 28 GHz and 39 GHz in the U.S., plus similar frequencies around the world. Furthermore, integration of multiple input, multiple output (MIMO) antennas into devices has made over-the-air (OTA) testing a necessity. In addition to 5G, automotive radar systems can operate at similar frequencies.


The Model 2040+ Multi-Radio Channel Replicator from Eastern OptX creates propagation paths and emulates channel losses, interference, propagation delay, multipath distortion, and fading effects through its internal fiber optics. Operating for 20 GHz to 40 GHz, the 2040+ simulates signal conditions up to one mile, which is the ranges that signals at these frequencies can operate. For lower frequencies, Eastern OptX has other models.

The Model 2040+ can connect directly to transmitters and receivers or for OTA testing, you can use antennas and conduct tests in anechoic chambers. If you're testing base stations in chambers, you'll need a circulator to emulate mobile signals.

Parameter Specification Notes
Instantaneous bandwidth Variable (Limited by circulator)
Accuracy 1% Optional 0.5%
Repeatability 0.01% At constant temperature
System RF gain 6 dB Typical, 1 mile @ 30 GHz
VSWR 2:1 Maximim
Spurious free dynamic Range 100 dB/Hz2/3 Maximim
1 dB Input Compression -15 dBm Minimum
Noise figure 25 dB (13 dB typ.) Maximum (Lower NF optional)
Input/output impedance 50 Ω Nominal

Price: $150,000. Eastern OptX, Model 2040+ product page.

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