Monocycle pulse generator

• US 3,997,843 A
• Filed: 06/20/1975
• Issued: 12/14/1976
• Est. Priority Date: 06/20/1975
• Status: Expired due to Term

• Current Assignee: Calspan Corp (Transdigm Group Incorporated)
• Original Assignee: Calspan Corp (Transdigm Group Incorporated)
• Inventors: Wohlers, Robert J.
• Primary Examiner(s): Curtis, Marshall M.
• Application Number:
  US05/588,756
• Time in Patent Office: 543 Days
• Field of Search: 328/67, 328/66, 307/268, 325/105
• US Class Current: 375/309
• CPC Class Codes: H03K 3/57 the switching device being a semiconductor device
• CPC Class Codes: H04B 1/04 Circuits

Abstract

The radio frequency source for a low power, lightweight radar is provided by operating a transistor in the avalanche mode. An open delay line is in the collector circuit and a shorted delay line in shunt with the output line is part of the emitter load. The resulting device can be employed as a low power, nanosecond, monocycle pulse generator with low range, or time domain, sidelobes.

Claims

1. A monocycle radio frequency pulse generator means including:

transistor means having a base, collector and emitter;

Dc power source means connected to said collector to bias said base below cutoff;

dropping resistor means located intermediate said DC power source means and said collector to limit collector-emitter current during the off condition of said transistor;

open circuit delay line means located intermediate said dropping resistor means and said collector to define the collector load;

trigger pulse generator means connected to said base for supplying a trigger pulse to said base and to cause said transistor to avalanche with a large surge of current coming from said open circuit delay line means to said emitter;

means for receiving a radio frequency pulse connected by an outlet line to said emitter;

shorted delay line means in shunt with said outlet line and defining the emitter load.

2. The monocycle radio frequency pulse generator means of claim 1 wherein said open circuit delay line means includes inner and outer coaxial conductors separated by a dielectric.