Transmission Line Transformer Time Delay Network Impedance
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Solution Overview
Problem
High-frequency applications, such as microwave frequency applications, face impedance transformation challenges due to time delays in transmission line transformers, which affect performance and bandwidth, particularly in coaxial transmission lines.
Innovation Solution
A transmission line transformer with a time delay network that includes a pair of output terminals connected to an input terminal through corresponding time delay elements, each with a different time delay, allowing for independent selection of time delays to compensate for interconnecting delays, rather than minimizing them, thereby improving impedance transformation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time delay elements with different time delays are used in the time delay network, then impedance transformation efficiency is improved, but device complexity increases
Solution Approach 1:
The time delay network is segmented into multiple independent time delay elements (first time delay element and second time delay element), each providing a different time delay. This segmentation allows independent optimization of each element's time delay characteristic to achieve proper phase alignment for impedance transformation, while keeping each individual element relatively simple in structure.
Solution Approach 2:
Different time delay values are assigned to different parts of the network (first time delay element vs. second time delay element) according to their specific positions and functions. This local differentiation of time delay characteristics enables precise control of phase relationships across the transformer, improving impedance transformation efficiency without requiring uniform complexity throughout the entire device.
2Adaptability or versatility
If time delay network with different time delays is implemented, then bandwidth is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The invention changes the time delay parameter of each time delay element to different values based on their positions in the network. By adjusting these time delay parameters, the transformer achieves proper phase alignment across a broader frequency range, enhancing bandwidth. This parameter-based approach allows flexibility in design while providing clear specifications for manufacturing.
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
This solution enables effective impedance transformation by ensuring that the voltage across the output terminals is equal and in phase, transforming the input impedance to a desired output impedance, enhancing the transformer's performance and bandwidth in high-frequency applications.
Implementation Method 1
A transmission line transformer with a time delay network that includes a pair of output terminals connected to an input terminal through corresponding time delay elements, each with a different time delay
Implementation Method 2
A transmission line transformer with a time delay network that includes a pair of output terminals connected to an input terminal through corresponding time delay elements
Data Source
AI summary
A transmission line transformer having a time delay network having a signal terminal and a pair of output terminals connected to the signal terminal through a corresponding one of a pair of time delay elements, the delay line elements having different time delays. A pair of transmission lines, each one having a pair of electrically coupled elements. A first one of the elements in one of the transmission lines has a first end connected to one of the pair of output terminals. A second one of the elements in such one of the transmission lines has a second end connected to a second end of one of the pair of elements in the other one of the transmission lines. The first one of the pair of elements in the other one of the pair of transmission lines is coupled to a second one of the pair of output terminals.