Induction charge microwave pulse generator having a split ground plane

• US 5,650,670 A
• Filed: 07/27/1995
• Issued: 07/22/1997
• Est. Priority Date: 07/27/1995
• Status: Expired due to Fees

• Current Assignee: The United States Of America As Represented By The Secretary Of The Air, United States Of America As Represented By The Secretary Of The Air Force
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Thaxter, James Bruce
• Primary Examiner(s): Elms, Richard T.
• Application Number:
  US08/508,138
• Time in Patent Office: 726 Days
• Field of Search: 307/106, 307/98, 333/20, 333/162, 327/124, 327/181, 505/866, 257/199, 257/275, 257/482, 257/604, 331/96-102, 331/172, 331/173
• US Class Current: 307/106
• CPC Class Codes: H03K 3/57 the switching device being a semiconductor device

Abstract

Complex and multi-cycle microwave pulse waveforms are generated by the transient discharge of an induction charged transmission line using only one fast switch. An essential feature of the transmission line circuit is the distinction between the ground planes of the bias circuit and the microwave circuit. This distinction permits spatial variation of the charge induced on the transmission line over sections of ground plane biased at different potentials. Rapid discharge of the biased ground plane sections produces a complex or multiple cycle voltage wave on the transmission line which results in multicycle microwave pulse generation. The transient discharge is initiated by a fast switch located in the microwave ground plane. The similarity between some operating characteristics of the herein described device and the traditional Frozen Wave Generator (FWG) justify naming the new device and Induction Charged Frozen Wave Generator (ICFWG).

Claims

1. An induction charge microwave pulse generator comprising:

a split ground plane with a first and second section separated by a gap;

a microwave transmission line media which outputs a microwave pulse when an induction charge is induced substantially along its entire length, wherein said microwave transmission line media comprises a conductive helical coil which encircles the split ground plane in a series of coils;

a means for producing a voltage potential difference between the first and second sections of the split ground plane; and

a switch which is placed in said gap between the first and second sections of the split ground plane to electrically connect them so that the voltage potential difference becomes approximately proportional to said induction charge which is induced substantially along the entire length of the microwave transmission line media so that the microwave pulse is produced thereby.

2. An induction charge microwave pulse generator, as defined in claim 1, wherein said producing means comprises:

a voltage source which is electrically connected to the first and second sections of the split ground plane; and

a means for electrically connecting said voltage source with a predetermined electrical impedance to the first and second sections of the split ground plane.