High temperature antenna measurement system with GSG or GS contact probing capability

A system to measure the return loss, radiation patterns and gain of planar antennas with GSG or GS probe connects at high temperatures has been presented. Antennas can be heated to 600degC and a radiation sweep of 360deg is possible. The return loss, radiation patterns and gain of a FSA have been presented on Styrofoam and ceramic heater/shuttle tile chucks at RT and 250degC. The antenna was measured on a Styrofoam chuck to show the effect the ceramic heater has on the measured data. The heater/shuttle tile chuck shifts the resonant frequency from its design frequency of 5 GHz to 4 GHz but its effect is minimal on the magnitude of Sn. The magnitudes of the gain at 90 and -90deg are not the same, which is due to the ceramic heater acting as a lens and focusing more radiation downward from the antenna through the ceramic heater. The phenomenon is also present on Styrofoam but not as predominant. The FSA and other omnidirectional antennas are the hardest to measure on this system and therefore this is a worst case test. Directional antennas such as patches would not be as impacted by the surrounding system.