Circuit Envelope Elements Capacitor (CE) Ground Ideal Transformer (CE) Inductor (CE) Resistor (CE) Amplifier (CE) Mixer (CE) Filter (CE) Variable Inductor (CE) Variable Capacitor (CE) Attenuator (CE) Three-Winding Transformer (CE) Signal Combiner (CE) Variable Attenuator (CE) Variable Resistor (CE) Phase Shift (CE) Transmission Line (CE) Z (CE) Sources Sinusoid (CE) Utilities Inport Outport (CE) Configuration (CE)