Radar system

A radar system configured to be coupled to a high frequency oscillator and an antenna, the radar system comprising:

• a coupler comprising:
• a first terminal coupled to receive a first signal from the high frequency oscillator;
• a second terminal coupled to receive a second signal from the antenna;
• a third terminal coupled to the first terminal and the second terminal and configured to supply a third signal using the first signal, the second signal, or both;
• and
• a fourth terminal coupled to the first terminal and the second terminal and configured to supply a fourth signal using the first signal, the second signal, or both;
• a first two-state device coupled to the third terminal and configured to substantially totally reflect the third signal when the first two-state device is impedance mismatched and to direct the third signal to an electronic circuit when the first two-state device is not impedance matched;
• a second two-state device coupled to the fourth terminal and configured to substantially totally reflect the fourth signal when the second two-state device is impedance mismatched and to direct the fourth signal to the electronic circuit when the second two-state device is not impedance matched;
• and
• a pulse generator coupled to the first two-state device and the second two-state device and configured to cause the first two-state device and the second two-state device to be impedance mismatched at a time of transmission and to be impedance matched at a time of reception.

A radar system comprising:

• a high frequency oscillator;
• an antenna;
• a coupler comprising:
• a first terminal coupled to receive a first signal from the high frequency oscillator;
• a second terminal coupled to receive a second signal from the antenna;
• a third terminal coupled to the first terminal and the second terminal and configured to supply a third signal using the first signal, the second signal, or both;
• and
• a fourth terminal coupled to the first terminal and the second terminal and configured to supply a fourth signal using the first signal, the second signal, or both;
• a first two-state device coupled to the third terminal and configured to substantially totally reflect the third signal when the first two-state device is impedance mismatched and to direct the third signal to an electronic circuit when the first two-state device is not impedance matched;
• a second two-state device coupled to the fourth terminal and configured to substantially totally reflect the fourth signal when the second two-state device is impedance mismatched and to direct the fourth signal to the electronic circuit when the second two-state device is not impedance matched;
• and
• a pulse generator coupled to the first two-state device and the second two-state device and configured to cause the first two-state device or the second two-state device to be impedance mismatched at a time of transmission and to be impedance matched at a time of reception.