A high performance antenna measurement system

The authors describe a high-performance, state-of-the-art antenna pattern measurement instrumentation system. The system utilizes advanced concepts to achieve high-accuracy, large-dynamic-range antenna pattern measurements at speeds more than 100 times faster than with any instrumentation system available today. Such speeds and range are especially required when measuring the pattern of millimeter-wave antennas. The basic system covers the frequency band 0.1 to 26.5 GHz and can be extended to cover full waveguide bands through 110 GHz. The system performs conventional measurements in the CW (continuous-wave) mode and can also operate in a pulse mode. The pulse mode of operation allows the operator to range gate out interfering multipath signals which often occur in practical ranges. This provides a measurement capability over a much larger dynamic range than can be achieved by a CW system alone or with extensive clutter subtraction routines or extensive usage of anechoic material.<>