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. Antennas can be mounted in free space or on human subjects, allowing us to measure radiation patterns, efficiency, average gain, and any human body interaction to the radiating device.
SNF Physical Setup
Many antennas can be fixtured during the allotted test time using existing structures. Custom fixturing may be required if the weight of the antenna under test is off-center by more than 36”, or if a specific mounting configuration is required. Customers have the option to design and provide their own fixtures, or JEM may design and build a custom fixture for a separate fee. To download the pdf drawing and dxf artwork of the mounting pattern, click here.
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: