Bluetest St & HP Reverberation Chambers
The Bluetest reverberation chambers can be used
for testing of small antennas and phones for any
wireless communication standard which are
designed for operation in multipath environment
with Rayleigh fading, such as GSM, PDC, CDMA,
WCDMA, DECT, Bluetooth, WLAN, and more.
The Bluetest reverberation chambers are multipath
simulators (patent pending).
The unique mode stirrers, two plate stirrers, one
rotating platform stirrer, and polarization stirring
provide good accuracy of the measurements even
in low frequency bands, such as GSM900.
The new and convenient high-speed plate stirrers
reduce measurement times to a minimum.
The measurements in Bluetest chambers replace
traditional measurements of small antennas and
wireless terminals by so-called 3D pattern
integration in antenna far-field or near-field ranges
using anechoic chambers.
Bluetest Reverberation Chambers are particularly
well suited for measuring phones in talk position
near a head phantom, in order to determine the
effect of the human body on the above quantities.
The following quantities can be determined with
good accuracy:
for wireless terminals:
total radiated power (TRP)
receiver sensitivity (TIS and AFS)
implemented antenna diversity gain
spurious radiation outside operating bands
for single- and multi-port small antennas and
antenna systems including MIMO systems:
embedded radiation efficiency on each port
diversity gain (apparent, effective and actual)
maximum available Shannon capacity
for active small antennas with integrated receive
or transmit amplifiers:
total radiated power
receiver sensitivity
Standard RC (Bluetest St)
When you need a compact, cost effective and light
chamber that can pass through a 80 cm wide door.
Light aluminum construction
Wheels for use when moving chamber
Support frame lifts chamber to a convenient
working height for accessing DUT
Transparent, shielded window in door
Halogen light illuminates DUT inside chamber
Complete chamber weight approx. 90 kg
2 standard outer widths: 790 mm and 1500 mm
Height when located on floor 1850 - 2000 mm
Height when on support frame 2400 - 2550 mm
Depth 1240 mm
Recommended frequency ranges:
For 790 mm width: 870 MHz - 6 GHz
For 1500 mm width: 650 MHz – 6 GHz
RF isolation (shielding): 45 dB
High Performance RC (Bluetest HP)
When you need strong shielding isolation when
measuring receiver sensitivity of wireless units.
Wheels on chamber facilitates relocation in lab
Mounting table for DUT inside chamber provides
easy access to it from outside.
Chamber size can be fitted to customer’s
frequency requirements and space constraints
Default outer width: 1930 mm
Default height: 2000 mm
Default depth:
1390 mm
Recommended frequency range for default
dimensions:
650 MHz – 6 GHz
RF isolation (shielding): 100 dB
Up to four simultaneous test antenna ports
Bluetest AB, Lindholmen Science Park, Götaverksgatan 1, SE-417 55 Gothenburg, Sweden
Bluetest St & HP – Technical Data
Measurement accuracies and times
The Bluetest Reverberation Chambers come with a
control program. This controls the mode stirrers
and the instruments provided by the customer. The
mode stirrers can be run in different sequences.
The times shown in the table are the typical times
needed to collect all power samples within the
frequency band. The time for measuring the
reference level (calibration) is not included in the
table. This is needed once per project. Faster
measurements are possible with reduced accuracy.
Total accuracy and frequency resolution will
depend on instrumentation provided by the
customer, test frequency, chamber size and test
sequence. The numbers in the table are valid for
the Bluetest HP chamber.
Measured
quantity
erad
TRP
TIS via
AFS
Measure time
1 min
1 min
5 – 10 min
Standard
deviation
0.5 dB
0.5 dB
1 dB
< 5 MHz
Single
channel
Single
channel
Frequency
resolution
erad = radiation efficiency
TRP = Total Radiated Power
TIS = Total Isotropic Sensitivity
AFS = Average Fading Sensitivity
Included in Bluetest RC delivery:
Common Properties
Mains power: 100-240 VAC, 50-60 Hz
Data interface: RS-232 (9-pin D-SUB contact)
Many Stirring methods for best accuracy:
2 fast plate stirrers
Additional platform stirrer
Full polarization stirring (3 antennas)
Frequency stirring
Available software modules:
Radiation efficiency, Diversity gain
Radiated power, Receiver sensitivity
To be provided by customer:
Windows XP PC with
RS-232 interface for controlling chamber
functions and
proper communication interface for controlling
instruments, such as e.g. GPIB (IEEE-488.2)
controller card.)
Instruments for different measurement set-ups:
Network Analyzer for calibration and passive
antenna measurements.
Pulse power meter and base station
simulator/emulator for TRP measurements. The
power meter can be a spectrum analyzer
operating in zero span mode.
Mobile communication test instrument for
measuring power and Bit Error Rate (BER) of
terminals of different wireless systems.
Please specify manufacturer and model number of
instruments and send information to Bluetest.
Cables for connecting customer-provided
instruments to Bluetest chamber and PC.
User manual describing how Bluetest chambers
can be used for measuring radiation efficiency, free
space impedance and radiated power.
Computer program for controlling the chamber.
Control electronics for plate and platform stirrers
(step motors), and polarization switch. (RS-232
Serial Interface, 9 pin female connector)
Cables to connect network analyzer to chamber,
and to connect AUT to connector on mounting
platform inside chamber.
Additional deliveries according to
customer’s specifications:
 Basic software module for controlling chamber
and user-specified network analyzer.
Installation of hardware and software.
Full day teaching of operating personnel.
Software modules for testing of active terminals.
Calibration dipoles for desired frequency bands
(most popular bands from 800 MHz and up are
available, others can be prepared on request).
Wideband disk-cone calibration antenna.
PVC cylinder with support, which can be filled
with lossy liquid and used in the same way as a
head phantom. Examples of recipes for the lossy
liquid can be provided without charge.
Support for calibration dipole and mobile phone
PVC foot for mounting head phantom.
Head phantom.
Hand phantom.
 (800 – 1900 MHz) tissue simulating liquid.
Information contained herein is believed to be accurate and reliable.
However, Bluetest assume no responsibility for its use. Technical data
are subject to change without notice.
Data sheet Bluetest St & HP 06/2007
Bluetest is a registered trademark of Bluetest AB, Sweden.
Bluetest AB, Lindholmen Science Park, Götaverksgatan 1, SE-417 55 Gothenburg, Sweden