Oscillator and detecting system

An oscillator, comprising:

• a substrate;
• a plurality of oscillation structures that transmit or receive electromagnetic waves, and are arranged on the substrate;
• and
• a power feed structure for electrically driving the plurality of oscillation structures, the power feed structure being arranged on the substrate, wherein
• the power feed structure includes a power source, a bias supply unit that supplies bias to the plurality of oscillation structures, and a control unit that controls the bias supply by the bias supply unit,
• the oscillation structures each include one antenna and an N piece (N≥1) of a semiconductor element electrically connected to the antenna,
• the N piece of semiconductor elements are supplied with bias by operations of the control unit and exhibit negative resistance characteristics, and out of the N piece thereof, a P piece (P≥0) thereof are supplied with bias by operations of the control unit and are connected to each other in parallel, and an S piece (S≥0) thereof are supplied with bias by operations of the control unit and are connected to each other in series, and with a direction of current flowing perpendicularly upward as to the substrate as a forward direction, an F piece (F≥0) thereof are supplied with bias in the forward direction by operations of the control unit, and an R piece (R≥0) thereof are supplied with bias in a reverse direction by operations of the control unit,
• the semiconductor element included in at least one of the oscillation structures exhibits asymmetrical current-voltage properties as to each other between forward bias and reverse bias, and
• at least one of the N, P, S, F, and R differs from another among the oscillation structures that are different from one another, by operations of the control unit.

An oscillator, comprising:

• a substrate;
• one oscillation structure that transmits or receives electromagnetic waves, and is arranged on the substrate;
• and
• a power feed structure for electrically driving the oscillation structure, the power feed structure being arranged on the substrate, wherein
• the power feed structure includes a power source, a bias supply unit that supplies bias to the oscillation structure, and a control unit that controls the bias supply by the bias supply unit,
• the oscillation structure includes one antenna and an N piece (N≥2) of a semiconductor element electrically connected to the antenna,
• the N piece of semiconductor elements are supplied with bias by operations of the control unit and exhibit negative resistance characteristics, and out of the N piece thereof, a P piece (P≥0) thereof are supplied with bias by operations of the control unit and are connected to each other in parallel, and an S piece (S≥0) thereof are supplied with bias by operations of the control unit and are connected to each other in series, and with a direction of current flowing perpendicularly upward as to the substrate as a forward direction, an F piece (F≥0) thereof are supplied with bias in the forward direction by operations of the control unit, and an R piece (R≥0) thereof are supplied with bias in a reverse direction by operations of the control unit,
• the semiconductor elements exhibit asymmetrical current-voltage properties as to each other between forward bias and reverse bias, and
• at least one of the N, P, S, F, and R changes, by operations of the control unit.