JEM’s SNF Chamber Capabilities
JEMs spherical near-field (SNF) antenna test chamber is the fastest facility available for full 4 pi steradian data collection. Using an array of electronically scanned probes to scan a full 360 degree measurement plane, our technicians can complete measurements in minutes rather than hours.
Our SNF chamber can perform tests over frequencies from 400 MHz to 6 GHz, enabling testing of antennas for AMP, PCS, GSM, Bluetooth™, IEEE 802.11, GPS and other new and evolving wireless systems. Mounting the antennas in free space or on human subjects allows us to measure radiation patterns, efficiency, average gain, and any human body interaction to the radiating device.
SNF Physical Setup
Our existing structures allow us to fixture multiple antennas during the allotted test time. If the weight of the antenna under test is off-center by more than 36”, or if the antenna requires a specific configuration, a custom fixture may be necessary. Customers have the option to design, as well as provide their own fixtures. To download the pdf drawing of the mounting pattern, click here. Alternatively, you may send us a request for the dxf artwork file, and we will respond as promptly as possible.
JEM’s Spherical Chamber can generate a wide range of data, i.e. 3D or 2D Radiation Patterns, Swept Gain and Efficiency Plots, and ASCII Data Files including amplitude, axial ratio, polarization, and phase.
See typical radiation pattern data plots below.
|25MHz Dipole||2450MHz Steered Array||1850MHz CP Spiral|
|3D Data Plot||3D Data Plot||3D Data Plot|
|2D Data Plot||2D Data Plot||2D Data Plot|
Frequently Asked Questions
Mechanical Handling the Data: