Transmission Line Pulse Circuit for 2x Voltage Rectangular Pulses
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Solution Overview
Problem
Existing pulse generating systems for high voltage and high current rectangular pulses are bulky, costly, and limited in output voltage and pulse duration, often requiring complex interconnection systems and extensive control for efficient operation, especially in hostile environments where size, weight, and reliability are concerns.
Innovation Solution
A transmission line pulse generation system that includes a voltage source, a coaxial cable with one conductor grounded at one end, a switching mechanism, and a diode to achieve an output pulse with twice the charge voltage and duration, utilizing reflections to shift the voltage and maintain efficiency without complex control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional transmission line pulse generators are used to generate high voltage pulses, then the output voltage is limited to equal the charge voltage, but the system size and weight can be reduced by using a single transmission line
Solution Approach 1:
The patent combines the charging function and pulse generation function into a single transmission line system. The same transmission line that is charged to voltage VC is used to generate the output pulse, eliminating the need for separate charging and output lines. This merging allows the system to achieve twice the charge voltage output (2VC) while using minimal cable length (one electrical length), thereby reducing system weight and complexity.
Solution Approach 2:
The patent changes the voltage parameter through reflective wave interaction. By controlling the switching timing and utilizing wave reflections at the load and source ends, the system transforms the charge voltage VC into an output pulse of 2VC. The voltage parameter is dynamically changed through the superposition of incident and reflected waves, allowing voltage multiplication without increasing the physical size of the transmission line.
2Duration of action of stationary object
If the electrical length of the transmission line is increased to extend pulse duration, then the pulse duration is limited to equal the electrical length of the line, but the system complexity can be reduced by using a single line
Solution Approach 1:
The patent employs periodic wave reflections within the single transmission line to extend the pulse duration. The switching mechanism is activated at specific intervals to initiate new voltage steps that reflect off the load and source ends, creating a series of overlapping pulses. This periodic action allows the system to generate continuous high voltage pulses with duration exceeding the electrical length of the line, while maintaining system simplicity through the use of a single transmission line.
Solution Approach 2:
The patent ensures continuous useful action by maintaining voltage on the transmission line through controlled switching and reflection. Instead of allowing the pulse to terminate after one electrical length, the system continuously generates and reflects voltage waves, ensuring that the output pulse continues beyond the single pass time. This continuity is achieved by timing the switching to coincide with reflected wave arrivals, maintaining the high voltage state without requiring additional transmission line length.
3Power
If complex interconnection systems are used to achieve higher output voltages, then the output voltage can be multiplied, but the system becomes bulky and costly
Solution Approach 1:
The patent merges the charging path and pulse output path into a single transmission line, eliminating the need for complex interconnection systems. By using the same line for both charging and pulse generation, and by utilizing reflective wave interactions, the system achieves voltage multiplication (2VC output from VC charge) without requiring multiple separate transmission lines or complex switching networks, thereby reducing system bulk and cost.
Solution Approach 2:
The transmission line serves itself by utilizing its own reflected waves to generate the high voltage output pulse. The same transmission line that is charged also generates the pulse through controlled reflections, eliminating the need for external voltage multiplication equipment or complex interconnections. The system uses the natural reflective properties of the transmission line to achieve voltage multiplication, making the line self-sufficient for both charging and pulse generation functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system generates high voltage pulses of up to twice the charge voltage and twice the electrical length of the transmission line, with reduced size and weight, and operates reliably in hostile environments without extensive control, achieving robust and economical pulse generation.
Implementation Method 1
The reflection means is for causing the polarity of the voltage step on the second electrical conductor to be reversed to a reversed polarity and for causing a the first voltage on the first electrical conductor to be shifted when the voltage step reaches the second end of the second conductor
Data Source
AI summary
A system is disclosed for generating a rectangular pulse with a transmission line, the pulse having a duration of twice the electrical length of the line and a voltage of up to twice the charge voltage. The system includes a voltage source, a switching means, and an output circuit. The voltage source is for providing a voltage potential to a first conductor of a transmission line. The switching means is for controllable coupling the first conductor of the transmission line to a second conductor of the transmission line at a first end of the transmission line, with the second conductor of the transmission line being coupled to a fixed voltage potential at a second end of the transmission line. The output circuit is coupled to the first conductor of the transmission line for providing an output pulse to a load.