Filter Circuit Divides Signals for Sharp Bandpass and High Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bandpass filters face challenges in achieving sharp filter characteristics and high power handling capability, especially when using superconductive resonators, which often result in current concentration and limited power resistance, making it difficult to efficiently pass high power signals while maintaining low loss effects.
Innovation Solution
The filter circuit design includes a four-port device that divides and combines signals in-phase or reversed-phase, with bandstop resonators and filters configured to reflect desired bands, and open ends or terminal ends to manage power distribution, allowing high-power signals to bypass bandstop resonators and ensuring sharp bandpass characteristics and high power resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If superconductive resonators are used to achieve low loss effects, then filter loss is reduced, but current concentration occurs and power handling capability is limited
Solution Approach 1:
The filter is divided into two distinct sections: a first section with superconductive resonators for low-loss signal transmission, and a second section with normal conductive resonators for high power handling. This segmentation allows each section to specialize in its strength, resolving the contradiction between low loss and high power capability.
Solution Approach 2:
Different sections of the filter are assigned different material properties: superconductive materials in the first section for minimal loss, and normal conductive materials in the second section for superior power handling. This local differentiation of quality allows the system to optimize for different requirements in different locations.
2Measurement precision
If resonators are connected in cascade to achieve desired filter characteristics, then filter selectivity is improved, but current flows through all resonators causing power handling limitations
Solution Approach 1:
The cascade connection is segmented into two stages: first section with superconductive resonators for sharp filter characteristics, and second section with normal conductive resonators for power handling. This segmentation allows the filter to achieve both selectivity and power capability without current concentration issues.
3Power
If resonators are connected in parallel to disperse input power, then power handling capacity is increased, but combined loss increases and superconductive filter advantages are lost
Solution Approach 1:
Instead of parallel connection, the patent uses series cascade connection of two specialized sections. This avoids the loss increase problem of parallel connections while still achieving power handling through the normal conductive second section.
Solution Approach 2:
The normal conductive resonators in the second section act as an intermediary that handles high power signals, protecting the superconductive resonators from excessive power while maintaining the overall filter performance.
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 design achieves both sharp bandpass characteristics and high power resistance, protecting superconductive resonators from high power and reducing combined loss, enabling efficient signal transmission with improved power handling and reduced heat flow, leading to a smaller filter circuit.
Implementation Method 1
combines signals supplied to the terminals B and C, and transmits the combined signal through the terminal A if the signals are in-phase with each other and through a terminal D if the signals are reversed-phase with respect to each other
Implementation Method 2
a first bandstop resonators circuit that includes not less than one resonator to reflect signals of a desired band within the passband of the first band stop filter
Data Source
AI summary
The present invention provides a filter circuit that can achieve both sharp bandpass characteristics and high power handling capability. The filter circuit includes: an input terminal that has a signal input; a four-port device that divides input signals; a band stop filter that has the center frequency of the input signals within the stopband, and causes the out-of-stopband signals among the input signals to pass; two bandstop resonators circuits that cause the signals passing through the band stop filters to pass, and reflect the signals; open ends that are connected in parallel to the two bandstop resonators circuits; and an output terminal that outputs the signals reflected by the band stop filters and the bandstop resonators circuits and combined at the four-port device.