Measurement of Electric Field Probe Response to Modulated Signals Using Waveguide Setup

Electric field probes based on diode-loaded short dipoles bear an inherent limitation of use concerning the signal waveform. When measuring signal waveforms other than sinusoidal, probes can show a considerable measurement error. Although this error has been recognized before, its importance is growing lately due to expansion of new modulation schemes. Therefore, a convenient measurement setup and procedure is needed to examine and measure such probe errors for various types of signals. An example of a waveguide-based measurement setup is presented in this letter. The advantage of the proposed setup is the ability to achieve high field strength in the test volume suitable for field probe testing, using small to moderate output power.