Narrow ultra wideband pulse generator

• US 20060267652A1
• Filed: 06/28/2005
• Published: 11/30/2006
• Est. Priority Date: 05/25/2005
• Status: Active Grant

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Camero-Tech, Ltd. (SK Group)
• Inventors: Kabelly, Moti, Keren, Yossi
• Granted Patent: US 7,265,598 B2
• Time in Patent Office: Days
• US Class Current: 327/173
• CPC Class Codes: H03K 3/33 by the use, as active elements, of semiconductor devices exhibiting hole storage or enhancement effect

Abstract

A circuitry for generating a narrow impulse including an input device coupled to a matching circuitry that is coupled to a step recovery diode (SRD). The input device is configured to receive a succession of digital input signals, each characterized by having high level and low level portions. The signals having less than 50% duty cycle. The input device is configured to drive forward the SRD through the matching circuitry during the high level portion of the digital signal, whereby the SRD stores sufficient power for generating the narrow impulse following the falling edge of the high level portion of the digital input signal.

Claims

1. A circuitry for generating a narrow impulse, comprising an input device coupled to a matching circuitry that is coupled to a step recovery diode (SRD);

the input device is configured to receive a succession of digital input signals, each characterized by having high level and low level portions, the signals having less than 50% duty cycle;

said input device is configured to drive forward the SRD through the matching circuitry during the high level portion of said digital signal, whereby said SRD stores sufficient power for generating said narrow impulse substantially following the falling edge of the high level portion of said digital input signal.

2. The circuitry according to claim 1, wherein said narrow impulse falls in the range of 3-10 Ghz.

3. The circuitry of claim 1, wherein said digital input signal having a repetition rate that falls in the range of 1-20 MHz.

4. The circuitry of claim 1, wherein said digital input signal has a time period of 15 nano seconds or more.

5. The circuitry of claim 1, further comprising output equalizing filter coupled to said SRD for outputting said generated pulse.

6. The circuitry of claim 1, wherein said input device includes a switching transistor.

7. The circuitry of claim 6, wherein said transistor is a bi-polar transistor.

8. The circuitry of claim 6, wherein said transistor being a FET.

9. The circuitry of claim 1, wherein said input includes a logical gate.

10. The circuitry of claim 1, fitted in comb generator.

11. The circuitry of claim 1, fitted in a frequency multiplier.

12. The circuitry of claim 1, fitted in a device for thru the wall imaging application.

13. The circuitry of claim 1, for use in low power consumption application.

20. The circuitry of claim 1 fitted in a device for thru the wall imaging application.

14. A circuitry for generating a narrow impulse, comprising an input device coupled to a matching circuitry that is coupled to a step recovery diode (SRD);

said input device is responsive to said input signal and is capable of driving forward the SRD for a minimal duration for storing sufficient power, for generating narrow impulse.

15. The circuitry according to claim 14, wherein said narrow impulse falls in the range of 3-10 GHz.

16. The circuitry of claim 14, wherein said digital input signal having a repetition rate that falls in the range of 1-20 MHz.

17. The circuitry of claim 14, wherein said digital input signal has a time period of 15 nano seconds or more.

18. The circuitry of claim 14, further comprising output equalizing filter coupled to said SRD for outputting said generated pulse.

19. The circuitry of claim 14, wherein said input device includes a switching transistor.