Millimeter Wave Terminal Performance

For 5Gmm-wave application scenarios, 3GPP TR38827 defines five-channel models for UMi (Urban Micro) CDL A~E of urban micro-base station and InO (Indoor Office) CDL A~E of indoor micro-base station. The purpose is to build a reconfigurable channel environment in the laboratory and verify the scene performance of base stations and terminals.

In order to achieve the above application scenario test in the laboratory, this test system has a perfect experimental environment such as a millimeter-wave full-band anechoic chamber, three-dimensional reconfigurable probe wall, millimeter-wave antenna, millimeter-wave frequency converter, and high-precision turntable. By accessing 5G core network and base station devices (or using base station emulator), using advanced instruments such as high-end channel simulator, it fully supports 5Gmm-wave mainstream band, supports all millimeter-wave channel fading models of 3GPP, and supports communication performance test of 5G base station, terminal, chip, and other morphological devices.

Using compact field technology, the system works with a base station emulator, spectrum analyzer, signal source, and terminal device to complete radiofrequency consistency test items defined by 3GPP 38521-2.

The millimeter-wave probe antenna of this system complies with the distance and angle layout requirements of 3GPP TR38827 by verifying the following channel model parameters in the test area:

Power Delay Profile (PDP)

Doppler/Temporal correlation

PAS similarity percentage (PSP)

Cross-polarization

Power validation

Finally, the similarity of laboratory channel environment is verified according to the channel verification criteria of 3GPP.

Probe Number	Theta/ZoA [deg]	Phi/AoA [deg]
1	90	75
2	85	85
3	85	55
4	85	95
5	95	95
6	90	105

A complete millimeter terminal performance test system includes:

RS Test
Probe wall
Probe antenna
Millimeter-wave frequency converter
Multi-axis turntable

Key features

A single millimeter-wave frequency converter integrates two independent radio frequency channels.
Flexible position of probe antenna;
Integrated design;

Mobile design;

This test system is a turn-key solution. You can test Throughput VS time by simply placing the terminal device on the turntable and configuring the relevant test scenario in the PC interface.

technical parameter

Item	Parameter	Remark
System
Size	LmWmHm（shell） LmWmHm（roller）
Weight	＜2T
Frequency	24~44GHz
Shielding effectiveness	>90dB
Test area	>20cm
Antenna
QTY	6
Frequency	24~44GHz
Polarization	Bipolarization
Port isolation	>30dB
VSWR	<1.7	Typ.
Gain	4dBi	Typ.
Beam width（3dB）	25°@
Cross Polarization Ratio	>30dB
Multi-axis positioner
Axis	2
Angle range	Azimuth axis: 0 ~ 360 degrees Polarization axis: 0 ~ 360 degrees
Angle step	≥0.1°
Angular Precision	<±0.05°
Repetition accuracy	<±0.05°
Speed	≤20°/s
Bearing	>20kg
Millimeterwave Upconverter
RF Frequency	24~31GHz
RF input power	<-5dBm
Gain flatness	<1.25dB@BW400MHz
IF Frequency	2~6GHz
Switching time	<2us
Power adjustment range	30dB
Local-oscillator input power	>0dBm