YIG Oscillator A Ten Second Explanation of How a YIG Oscillator works Diode Detector A Mathematical description of how a diode detector can provide a voltage output that is proportional to incident power input. Maxwell's Equations Maxwell's Equations in differential form. Fourier Series Intuitive explanation of periodic waveforms. Light Emitting Transistor Have you ever seen a light emitting transistor?  Did you know that an ordinary 2N2222A transistor emits light when its base emitter junction are reversed biased? Mixers General Notes on how mixers work