Ultra-low-cost, medium impedance RF probe is rugged and wideband

A rugged, low-cost RF probe can be made from materials readily available in the lab. This probe is useful for making relative measurements while troubleshooting a low-impedance circuit. Applications include locating the source of spurs, measuring relative spur and harmonic levels, and identifying a failed amplifier or SAW filter.

This application note describes how simple it is to construct a rugged, low-cost RF probe in the lab. When used between about 400kHz and 1GHz on a 50? circuit, the probe provides relative measurements during troubleshooting of a low-impedance circuit.

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