Antenna Test Range

The antenna test range is used to measure the performance characteristics of test antennas. Parameters such as gain, pattern, VSWR (return loss), and cross-polarization rejection, among others, will be measured to research grade precision with the test range. This is done by using a 3-axis pedestal for the antenna under test to allow accurate movement in azimuth, elevation and polarization under computer control. The receiver system uses a scalar analysis measurement system (based on a source and receiver, both under computer control). The range source consists of a remotely controlled synthesized generator, driven by IEEE-488, capable of covering the frequency range from 50 MHz to 18 GHz, with sufficient output power to drive power amplifiers.

The receiver currently uses a spectrum analyzer (a scalar network analyzer is used for specific tests, such as VSWR). As the measurement system evolves, vector measurement capability (a vector network analyzer) will be added to permit array optimization through phase front measurement techniques. A broadband source antenna set, using horns and log spirals, remotely selectable, can be used to provide the measurement excitation.