Base Stations

For Customers in Charge of Developing and Evaluating Base Stations

In evaluating a 5G base station, it is necessary to ensure that the radio waves emitted by the sample do not affect the equipment and people in the vicinity.
Large base stations with high transmission power dissipate more heat. It is necessary to provide a stable temperature environment even with heat generation during evaluation.
ESPEC provides the products necessary for base station evaluations.

Test Systems

Systems for OTA Tests/Wireless Tests in Temperature Environments

For 5G base stations, temperature dependency evaluations in OTA measurements are required because antennas and wireless send/receive modules have been integrated into
a single unit to reduce transmission losses.
These systems are capable of conducting temperature tests while possessing the functionality of an RF anechoic chamber with an attenuation rate of 60 dB or more at 30 GHz frequencies.

Examples

Systems for OTA Tests/Wireless Tests in Temperature Environments
Constant Temperature RF Anechoic Chamber

Enables you to conduct wireless RF performance tests under a range of temperature conditions.
Shielding performance → frequency range: 0.5 to 30 GHz, attenuation rate: 60 db or higher.
To minimize the impact on the surrounding equipment, the chamber is designed to prevent any RF leak emitted by the sample.
The interior of the RF anechoic chamber can be precisely controlled from low temperature to high temperature.
Espec's proprietary heat insulation technology prevents turntable or positioner from freezing, allowing you to execute tests under sub-freezing temperatures.

Temperature range		-40〜+100℃
Shielding performance	Frequency range	0.5〜30GHz
Shielding performance	Attenuation rate	60 db or higher
Interior dimensions(mm)		W14000×H3000×D7000

* Contact ESPEC for shielding performance and interior dimensions not listed above.

Systems for OTA Tests/Wireless Tests in Temperature Environments
Shielded Box/RF Anechoic Box + Precision Air Supply System

Allows you to conduct wireless RF performance tests in temperature conditions.
Conditioned air from the Precision Air Supply System is supplied to the RF anechoic/shielded box through a duct.
Place a test sample in a radio wave transmissive box connected to the air supply system to maintain the temperature conditions.
The air supply system can be retrofitted to the existing anechoic/shielded box.
*Please contact ESPEC for more details.

Temperature range		-40〜+100℃
Performance	Temperature heat-up time	+20°C to +100°C within 30 min.
Performance	Temperature pull-down time	+20°C to -40°C within 70 min.
Outside dimensions(mm)		W1070×H1790×D900

Temperature Environment Wireless Protocol Test System - RF Anechoic Box-Type Low Temperature Chamber

Capable of wireless protocol tests in a temperature environment.
Ensures an attenuation rate of 60 dB or greater in 4.0 to
6.0 GHz frequency bands.
The interior of the RF anechoic box can be precisely controlled from low temperature to high temperature.
Smaller installation area than an RF anechoic chamber to facilitate testing of small communications modules.

Model	PUAN-3	PUAN-4
Frequency range / Attenuation rate	0.7～2.4GHz/45dB~ 2.4～4GHz/50dB~ 4～6GHz/60dB~
Controlled temperature range	-40 to +100 °C
Interior dimensions(mm)	W300×H550×D500	W750×H750×D550

High Temperature/Low Temperature Reliability/Operation Test System

As the number of antennas increases, the antennas are densely arranged, and the greater the transmission output it becomes, the heat generation of base stations increases.
This system can provide a stable test environment from low temperatures to high temperatures for the heat generated by the base station and support a maximum heat-generation load of 68.3 kW in a -40°C environment.
You can also change the wind flow to match the installation environment and characteristics of the base station, as well as the exhaust heat direction.

Examples

High Temperature/Low Temperature Reliability/Operation Test System
High-Power Walk-In Chamber

Provides a stable test environment from low temperatures to high temperatures for the heat generated by the base station.
Supports a maximum heat-generation load of 68.3 kW in
a -40°C environment.
The application of power and measurement timings can be synchronized with the temperature test program by using
the time signal terminals.
It is equipped with a ramp for loading and unloading heavy specimens using dollies and carts.
The floor load capacity of 600 kg/m² allows the installation of heavy specimens and multiple specimens.

● Test Area Variations

<Down-Flow Air Conditioning> <Up-Flow Air Conditioning>

●Air conditioning control can be customized according to the installation environment of the base station.
・Wind flow can be changed to match the characteristics and exhaust heat direction of the base station.
・Reduced wind speed in the test area for more uniformly controlled temperature/humidity.

Temperature range	Allowable heat load	Temperature Change Rate (Heat-Up)	Temperature Change Rate (Pull Down)
-70℃～＋150 °C	68300 W (at -40 °C) 90600 W (at +80 °C)	3°C/min (-40 → +150 °C) 0.5 °C/min (-70 → +150 °C)	3°C/min (+150 → -70 °C)

High Temperature/Low Temperature Reliability/Operation Test System　FD Chamber

Provides a stable test environment from low temperatures to high temperatures for the heat generated by the base station.
Supports a maximum heat-generation load of 10 kW in a -40°C environment.
Delivers a temperature rate of change of 3°C/min or faster during temperature heat-up and pull-down.

Temperature range	-70～＋180℃
Inside capacity	1800L～11000L
Temperature Change Rate	3°C/min or faster (-45°C ⇔ +158°C)
Allowable heat load	10000W(at -40°C)
Allowable heat load	19000W( at +80°C)

Consult with Our Dedicated 5G/IoT Advisors

We can help you work through issues related to testing.

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