Switchable Microwave Filter Using Dual-Mode Ring Resonator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional microwave filters require separate circuit architectures for bandpass and bandstop frequency responses, leading to complex circuits and increased area, as they cannot easily switch between these responses without altering the circuit architecture.
Innovation Solution
A switchable frequency response microwave filter is designed, integrating both bandpass and bandstop filter architectures into a single circuit using a dual-mode ring resonator and voltage-controlled varactors to modulate phase velocities, allowing for switching between bandpass and bandstop responses without replacing the circuit architecture, with equations controlling the center frequencies of both responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate circuit architectures are used for bandpass and bandstop filters, then the desired frequency responses can be achieved, but the circuit complexity and area increase
Solution Approach 1:
The patent combines both bandpass and bandstop filter functionalities into a single unified circuit architecture using a dual-mode ring resonator. By integrating the two filter types that traditionally required separate circuits, the design achieves frequency response switching capability while reducing overall circuit complexity and area.
Solution Approach 2:
The dual-mode ring resonator serves multiple functions simultaneously - it can operate in both bandpass and bandstop modes depending on the excitation configuration. This multi-functional design allows a single circuit to provide both frequency responses, eliminating the need for separate filter architectures.
2Adaptability or versatility
If separate circuit architectures are used for bandpass and bandstop filters, then the desired frequency responses can be achieved, but the circuit area increases
Solution Approach 1:
The patent combines both bandpass and bandstop filter functionalities into a single unified circuit architecture using a dual-mode ring resonator. By integrating the two filter types that traditionally required separate circuits, the design achieves frequency response switching capability while reducing overall circuit complexity and area.
3Adaptability or versatility
If the circuit architecture is totally replaced to switch between frequency responses, then the desired filtering performance is achieved, but the switching speed and continuity are reduced
Solution Approach 1:
The patent employs dynamic switching mechanisms using voltage-controlled varactors that can rapidly change the resonator's electrical characteristics. This allows the filter to switch between bandpass and bandstop modes electronically without physical reconfiguration, achieving fast switching speeds and continuous operation.
Solution Approach 2:
The filter utilizes voltage-controlled varactors to dynamically alter the electrical parameters (capacitance) of the ring resonator. By changing these parameters through voltage control, the filter can switch between different frequency responses rapidly, avoiding the time loss associated with physical architecture replacement.
4Adaptability or versatility
If different circuit architectures are used for bandpass and bandstop filters, then the desired frequency responses are achieved, but the phase velocity control becomes complex
Solution Approach 1:
The dual-mode ring resonator serves multiple functions simultaneously - it can operate in both bandpass and bandstop modes depending on the excitation configuration. This multi-functional design allows a single circuit to provide both frequency responses, eliminating the need for separate filter architectures.
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 solution enables seamless switching between bandpass and bandstop frequency responses within a single circuit, reducing complexity and area, while allowing for precise control of center frequencies, as demonstrated by simulation and measurement results showing effective filtering performance.
Implementation Method 1
an input voltage-controlled varactor coupled to the signal input electrode and a first voltage source; a dual-mode ring resonator coupled to the input voltage-controlled varactor, a grounding terminal and a second voltage source
Implementation Method 2
The two voltage sources are used to modulate the perturbing voltage-controlled varactors, whereby the phase velocities of the even mode and odd mode of the signal are controlled in the dual-mode ring resonator
Implementation Method 3
a dual-mode ring resonator coupled to the input voltage-controlled varactor, a grounding terminal and a second voltage source and receiving the signals via the input voltage-controlled varactor
Data Source
AI summary
The present invention discloses a switchable frequency response microwave filter, which uses voltage-controlled varactors to attain the separation or combination of the odd mode and even mode of signals in a dual-mode ring resonator to realize a bandpass or bandstop function and then controls the frequency response of the output filtered signals. Further, the present invention integrates different circuit architectures having bandpass and bandstop functions into a single circuit to reduce the complexity of the circuit.