Abstract: Described herein is wideband dual-polarized, four-quad-loop antenna suitable for use at VHF/UHF one embodiment with center frequency of 245 MHz had a bandwidth of 170 MHz to 320 MHz band (61% instantaneous bandwidth).

Abstract: A dual port memory waveform generator system uses a clock-based system whose pulse durations and separations were set by counters that use the same fundamental clock frequency of the radar to be simulated. This pulse generator is loaded from a laptop computer. The output pulses are used to control pin switches to switch various frequencies, amplitudes, or phases as required for the particular radar being simulated. The result is a system with very good fidelity that will fit in a suitcase, and is very portable.

Abstract: An electronics circuit which provides for the recording of instrumentation data on an optical disk is disclosed. The optical disk is formatted in a spiral format instead of concentric tracks. The spiral format allows data to be recorded without the gaps that would be associated with concentric tracks. The instrumentation system provides each channel with a programmable instrumentation amplifier, a six pole lowpass switched capacitor filter, a sample and hold amplifier, and a digital to analog converter to provide automatic offset capability. Since each channel has its own components, simultaneous samples of every channel can be captured. All of the input signal's channel variables can be changed under software control without hardware changes. A single board computer is used for a system controller.