Abstract: A unique diode sensor adapted for responding with pre-established sensitivity over a range of relatively low frequencies. A diode is connected to a dipole antenna having both conductive and resistive portions. Lumped impedances are connected in parallel with the diode and the values of these impedances are selected in coordination with the characteristics of the diode and antenna to control the sensitivity of the sensor as a function of the frequency of the illuminating energy.
Abstract: A temperature probe that does not perturb incident electromagnetic fields which includes a high resistance thermocouple mounted within a rigid needle structure. Special leads connect the thermocouple to appropriate metering means to register the temperature sensed by the thermocouple.