Microwave-induced arcing in filters

This study is concerned with identifying worst-case results for microwave energy coupled into electronic systems. A method of observing specific arc locations in parallel-coupled stripline filters using a conventional oscilloscope camera is described. Experiments were performed with a network analyzer and with two 1-MW pulsed sources at S-band and X-band frequencies, respectively. The results were used to develop models of the parallel-coupled-stripline filters. These models are in good agreement with the low-power S-parameter data from network analyzer measurements made on the filters. High-power models were constructed using zero impedance paths to represent arcs. These models extend limited high-power data, giving the wideband responses of the filters under conditions of breakdown.<>