Power Divider Circuit with Resonant Harmonic Filtering
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Solution Overview
Problem
Existing power dividers face challenges in effectively separating and filtering microwave signals, particularly in reducing high frequency harmonics and maintaining low insertion loss across a wide frequency range.
Innovation Solution
A power divider design comprising a power dividing circuit with parallel resonant circuits and microstrip lines, coupled with a matching element to match impedance and isolate sub-circuits, which generates resonance frequencies to filter carrier signals and reduce high frequency harmonics, with specific configurations of capacitors and inductors in each resonator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional power dividers are used for signal separation, then basic power division is achieved, but high frequency harmonics cannot be effectively reduced and insertion loss is high
Solution Approach 1:
The power divider is segmented into multiple independent transmission sub-circuits (first, second, and third sub-circuits), each with its own resonant circuit. This segmentation allows each sub-circuit to handle specific frequency components, enabling effective harmonic reduction while maintaining low insertion loss through specialized resonance tuning at 5.2 GHz and 5.8 GHz.
Solution Approach 2:
The resonant circuits employ variable capacitance elements (varactors) that allow dynamic adjustment of resonance frequencies. By changing the capacitance parameters, the system can optimize filtering performance for different harmonic frequencies, reducing insertion loss while effectively suppressing unwanted harmonics through parameter optimization.
2Object-affected harmful factors
If resonant circuits are added to filter harmonics, then filtering performance is improved, but device complexity increases
Solution Approach 1:
Multiple resonant circuits are merged into a unified power divider structure where the first, second, and third transmission sub-circuits share common input and output ports. This merging approach integrates harmonic filtering functionality into the existing power division architecture, improving filtering performance without proportionally increasing overall device complexity.
Solution Approach 2:
The resonant circuits serve multiple functions simultaneously: they act as impedance matching networks, harmonic filters, and signal routing elements. By designing the resonant circuits to perform multiple roles, the patent achieves effective harmonic filtering while minimizing the increase in device complexity through multi-functional component design.
3Manufacturing precision
If impedance matching elements are added to isolate sub-circuits, then signal separation is improved, but manufacturing complexity increases
Solution Approach 1:
Impedance matching elements are introduced as intermediary components between the transmission sub-circuits to isolate them electrically. These matching elements serve as mediators that improve signal separation precision by preventing unwanted coupling between sub-circuits, while their standardized designs facilitate relatively straightforward assembly and manufacturing processes.
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 design achieves efficient signal separation and filtering, with insertion losses less than -20 dB and effective reduction of high frequency harmonics, as demonstrated by simulation results showing resonance frequencies at 5.2 GHz and 5.8 GHz, and improved filtering performance.
Implementation Method 1
The plurality of resonators 24 is configured to generate a resonance frequency to filter carrier signals inputted from the input port P1
Data Source
AI summary
A power dividing circuit includes a first transmission sub-circuit having an input port and a first resonant circuit, a second transmission sub-circuit having a second resonant circuit, and a third transmission sub-circuit having a third resonant circuit. A matching element is coupled between the second transmission sub-circuit and the third transmission sub-circuit. An input carrier signal is divided into a first signal to the second transmission sub-circuit and a second signal to the third transmission sub-circuit through the first transmission sub-circuit. The second resonant circuit and the third resonant circuit generate resonant frequency to reduce high frequency harmonics under a specific frequency range in the input carrier signal. A power divider is also provided.