Automatic Frequency Modulation Filter with Motor-Driven Lug Adjustment
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Solution Overview
Problem
Conventional filters require manual adjustment of center frequency using a network analyzer, making post-packaging frequency adjustments inconvenient and costly, especially when integrated with communication devices, as they often necessitate device removal and disrupt signal transmission.
Innovation Solution
An indirect transmission type automatic frequency modulation filter that uses a motor unit to adjust the depth of lugs inserted into cavities, maintaining original frequency response, with a guide pin and hole system to prevent movement errors and a return unit for restoring force, allowing external frequency signal-driven adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment method is used to adjust the center frequency of the filter, then the filter can be adjusted during manufacturing, but the filter cannot be adjusted after packaging and integration, requiring device disassembly and causing signal transmission disruption
Solution Approach 1:
The filter incorporates a movable moving plate that can dynamically adjust its position relative to the microwave body, transforming the static filter structure into a dynamic one. The motor unit drives the moving plate to change the insertion depth of lugs into cavities, enabling real-time center frequency adjustment without device disassembly.
Solution Approach 2:
The patent replaces the manual mechanical adjustment method with an automated motor-driven system. The motor unit converts electrical signals into mechanical motion, automatically positioning the moving plate to achieve the desired center frequency, eliminating the need for manual intervention and device disassembly.
2Adaptability or versatility
If the filter is adjusted after integration with communication device, then the center frequency can be changed, but the operation consumes much time and incurs high cost, and affects signal transmission
Solution Approach 1:
The motor unit automates the frequency adjustment process by converting electrical control signals into precise mechanical movements of the moving plate. This eliminates manual adjustment operations, significantly reducing adjustment time and allowing frequency changes to be made quickly without disrupting communication device operation.
Solution Approach 2:
The filter performs self-adjustment through the motor-driven mechanism, automatically positioning the moving plate to the required position based on control signals. This self-service capability eliminates the need for external manual intervention, reducing both time loss and operational disruption.
3Reliability
If guide pin and guide hole are added to prevent unsmooth movement, then the movement between motor unit and moving plate becomes smooth, but the device complexity increases
Solution Approach 1:
The guide mechanism is segmented into separate components: a guide pin attached to the motor unit and a guide hole in the moving plate. This segmentation allows each component to be optimized independently while working together to constrain and guide the movement, ensuring smooth operation without excessive complexity.
Solution Approach 2:
The guide pin and guide hole act as intermediary elements between the motor unit and the moving plate. They mediate the interaction by providing a constrained path for movement, eliminating unsmooth motion caused by assembly tolerances while adding minimal structural complexity.
4Extent of automation
If motor unit is used to drive the moving plate directly, then the adjustment is automated, but the dislocation due to assembling tolerance causes unsmooth movement
Solution Approach 1:
The guide pin and guide hole serve as intermediary elements that compensate for assembly tolerance dislocation. They provide a constrained movement path that guides the moving plate smoothly during motor-driven adjustment, eliminating unsmooth motion caused by manufacturing tolerances while preserving automated operation.
Solution Approach 2:
The guide mechanism provides beforehand cushioning by pre-establishing a constrained movement path between the motor unit and moving plate. This preventive measure compensates for potential assembly tolerance issues before they cause unsmooth movement, ensuring accurate and smooth automated adjustment.
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
Enables convenient, cost-effective, and efficient adjustment of center frequency without disassembling the filter, reducing operational time and signal disruption by using a stepper motor to drive a gear set or rod, ensuring smooth movement and maintaining filter properties.
Implementation Method 1
transmits an external frequency signal (which is the required frequency of the filter) to a motor unit and converts the external frequency signal into a displacement angle of the motor unit
Implementation Method 2
having a guide pin and a guide hole to prevent any unsmooth movement caused by the dislocation between the motor unit and the moving plate due to assembling tolerance
Implementation Method 3
The lugs are inserted into the cavities to a certain depth to adjust a center frequency
Data Source
AI summary
Disclosed is an indirect transmission type automatic frequency modulation filter including a microwave body, a moving plate, a fastener, and a motor unit. The microwave body has plural openings. The moving plate includes a board, plural lugs and a first moving member, and the lugs and the first moving member form the board. The fastener includes a support base and a second moving member. The motor unit includes a rod and a driver, and the driver determines a clockwise rotation or a counterclockwise rotation and drives the rod to move the moving plate towards or away from the microwave body so as to insert the lugs into cavities to a desired depth and adjust a center frequency.