Impulse generator utilizing nonlinear transmission line
The impulse generator comprises a nonlinear transmission line capable of obtaining an impulse with a small half value width and a large amplitude, in which a plurality of transmission line units having a unit line unit and a diode are connected in series, a pulse generator connected to the transmission terminal of the nonlinear transmission line, and a bias-dependent element connected to the reception terminal of the nonlinear line, wherein the anode of the diode of the transmission line unit is connected to the transmission line and the cathode is connected to the ground, and one end of the bias-dependent element is connected to the reception terminal of the transmission line and the other end is biased to a negative potential.
1. An impulse generator comprising:
a nonlinear transmission line in which a plurality of transmission line units having a unit line unit and a diode are connected in series;
a pulse generator connected to the transmission terminal of the nonlinear transmission line; and
a bias-dependent element connected to the reception terminal of the nonlinear transmission line,
wherein an anode of the diode of the transmission line unit is connected to the transmission line and a cathode is connected to a ground,
wherein one end of the bias-dependent element is connected to the reception terminal of the transmission line and the other end is biased to a negative potential, and
wherein the bias-dependent element comprises two diodes connected with respective cathode electrodes being opposed to each other and an inductance connected in parallel to the two diodes.
2. The impulse generator as set forth in claim 1 , further comprising an amplifier connected to the reception terminal of the transmission line.
3. The impulse generator as set forth in claim 2 ,
wherein the bias-dependent element has a characteristic that its reactance is large when a voltage between terminals of the bias-dependent element is less than a predetermined value and the reactance is small when the voltage between terminals is greater than the predetermined value.
4. The impulse generator as set forth in claim 2 ,
wherein the bias-dependent element comprises two diodes connected with respective cathode electrodes being opposed to each other and an inductance connected in parallel to the two diodes.
5. The impulse generator as set forth in claim 2 ,
wherein the amplifier has a high input impedance.
6. The impulse generator as set forth in claim 1 , further comprising a terminating resistor connected to the reception terminal of the transmission line.
7. The impulse generator as set forth in claim 6 ,
wherein the bias-dependent element has a characteristic that its reactance is large when a voltage between terminals of the bias-dependent element is less than a predetermined value and the reactance is small when the voltage between terminals is greater than the predetermined value.
8. The impulse generator as set forth in claim 6 ,
wherein the bias-dependent element comprises two diodes connected with respective cathode electrodes being opposed to each other and an inductance connected in parallel to the two diodes.
9. The impulse generator as set forth in claim 1 ,
wherein the bias-dependent element has a characteristic that its reactance is large when a voltage between terminals of the bias-dependent element is less than a predetermined value and the reactance is small when the voltage between terminals is greater than the predetermined value.
10. The impulse generator as set forth in claim 9 ,
wherein the bias-dependent element comprises two diodes connected with respective cathode electrodes being opposed to each other and an inductance connected in parallel to the two diodes.
11. The impulse generator as set forth in claim 1 ,
wherein the bias-dependent element comprises two diodes connected with respective cathode electrodes being opposed to each other and an inductance connected in parallel to the two diodes.