Shf Frequency Range

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					                   Super-High Frequency (SHF) Anechoic

                                 About the SHF Anechoic Chamber
The Super-High Frequency (SHF) anechoic chamber (SHF anechoic chamber) in the Department of Electrical and
Electronics Engineering (EEE) of the University of Hong Kong is the most advance fully shielded anechoic chamber in the
With a dimension of 8 x 4 x 4 m (L x W x H), the SHF anechoic chamber purchased from Satimo can be used to perform
active and passive measurements on different wireless communication devices in the frequency from 400 MHz to 18GHz.

It is an ideal equipment for the Over-The-Air (OTA) measurements such as the Total Radiation Power (TRP) and the Total
Isotropic Sensitivity (TIS) from 400 MHz to 6 GHz with full Cellular Telecommunications and Internet Association (CTIA)
requirements for wireless communications devices such as CDMA, GSM, GPRS, EDGS, HSDPA, WiFi, CDM2000, 1x
RTT, 1EVD, WCDMA, etc using spherical scanning. It also can be used to perform Radiation Spurious Emission (RSE)
measurements, including the 3-dimemsional (3D) radiation pattern, 2-dimensional (2D) radiation pattern and antenna
efficiency, etc. from 400 MHz to 18 GHz, for wireless communications devices and antenna.
The SHP Chamber is a powerful tool for researches and developments in the areas of wireless communications devices
and antennas designs. It has an array of 23 probes, spaced at 15° in elevation, with an internal arch diameter of 2.4
meters, designed for the frequency range of 400 MHz – 6 GHz, to give high measurement speed combined with a low-
reflectivity-measurement geometry for accurate results. By using electronic scanning, the Chamber cane perform a full
sphere measurement with only a 180° azimuth rotation of the device-under-test (DUT), leading to a very rapid full 3D
radiation pattern measurements compared to the conventional single-probe chambers.
In active mode measurements, with the use of a radio communications tester, the chamber can be used to perform the
OTA Performance Testing for mobile phones and other wireless communications devices.

The chamber is equipped with an additional set of 18GHz high frequency probes, covering the frequency range of 6-
18GHz for wireless devices operating at higher frequencies.

In passive mode measurements, with the use of a vector network analyzer, the chamber can provide radiation pattern
data in any polarization, linear or circular, as well as antenna efficiency, for antenna size up to 2m.

Moreover, the chamber is also installed with equipment for Radiation Spurious Emission (RSE) measurements up to the
frequency of 18 GHz.

                                         The HKU EEE Services
In addition to the research and other activities, the EEE Department also offers a wide range of wireless device
measurement services to the industry.

For example, the chamber in the EEE Department is capable of carrying out the OTA measurements for different wireless
devices, the on-body measurements of mobile devices, the 3D radiation patterns, gain and efficiency measurements of
different kinds of antennas for wireless communications devices such as mobile phones, base stations, notebooks, WiFi
and RFID etc, and the radiation spurious emission measurement of devices.

                                         Measurement Services
Summary of measurement services:
  o Over-The-Air (OTA) measurements such as TRP(3D) and TIS(3D) for CDMA, GSM, GPRS, EDGS, HSDPA, WiFi,
    CDM2000, 1x RTT, 1EVD, WCDMA, with CTIA Revision 2.2.1 requirement,
o Gain and efficiency of antennas
o Active and passive measurements of wireless devices and antenna in the frequency range from 400 MHz to 18 GHz
o Radiation Spurious Emission (RSE) measurements of electronic devices in the frequency range to 18 GHz


                                        Rm 3-17, Haking Wong Building
                           The University of Hong Kong, Pokfulam Road, Hong Kong


                                    Dr. S.W. Cheung. Associate Professor,
              Department of Electrical and Electronics Engineering, The University of Hong Kong.
                                        Email :
                                           Direct : (852)-2859-2425
                                            Fax : (852)-2559-8738

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