Coaxial High Frequency Filter Motorized Coupling Adjustment
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Solution Overview
Problem
Existing high-frequency filters in coaxial designs for the mobile radio sector face challenges with complex and error-prone adjustments, high mechanical complexity, and susceptibility to passive intermodulation, which complicates the setting of coupling bandwidth and resonance frequency.
Innovation Solution
The implementation of additional adjustment means, such as sliders and push rods, allows for the adjustment of coupling bandwidths and resonance frequencies in a simple and reproducible manner, using known resonator parts to minimize manufacturing costs and intermodulation issues, with resonators arranged in multiple rows and offset for flexible coupling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional adjustment methods using rotating adjustment elements are used, then resonance frequency can be adjusted, but the adjustment process becomes complex and error-prone
Solution Approach 1:
The patent replaces traditional mechanical rotating adjustment elements with a motor-driven adjustment mechanism. Motors are integrated into the resonator structure to automatically adjust the position of adjustment elements, eliminating manual rotation operations and reducing adjustment complexity while maintaining frequency adaptability
Solution Approach 2:
The filter system incorporates automatic adjustment capabilities where the resonators can self-adjust their resonance frequencies through integrated motors and control systems. This self-service mechanism eliminates the need for complex manual adjustment procedures and reduces operational errors
2Manufacturing precision
If multiple adjustment elements are added to adjust coupling bandwidth, then coupling can be precisely controlled, but mechanical complexity increases
Solution Approach 1:
The patent combines multiple adjustment functions into a single integrated structure. The adjustment elements are merged with the resonator body, and multiple coupling adjustments are achieved through coordinated movement of integrated components rather than separate mechanical elements, reducing overall mechanical complexity while maintaining precise coupling control
Solution Approach 2:
The adjustment mechanism is designed with multi-functionality, where a single motor-driven system can adjust both resonance frequency and coupling bandwidth. This universal adjustment mechanism eliminates the need for separate dedicated adjustment elements for each parameter, reducing mechanical complexity
3Ease of manufacture
If traditional casting or milling technology is used for manufacturing, then production is economical, but adjustment precision and reproducibility are limited
Solution Approach 1:
The patent incorporates adjustment mechanisms directly into the manufacturing process. Motors and adjustment elements are pre-integrated during casting or molding, allowing precise adjustment capabilities to be built-in during initial manufacturing rather than requiring post-production calibration, thereby maintaining economical production while improving precision
Solution Approach 2:
The invention enables easy modification of critical parameters such as resonator dimensions and coupling aperture sizes through motorized adjustment. This allows precise parameter changes to be made after manufacturing without requiring complex re-manufacturing processes, improving adjustment precision while maintaining manufacturing economy
4Ease of manufacture
If resonators are arranged in a fixed configuration, then manufacturing is simplified, but flexibility in coupling adjustment is reduced
Solution Approach 1:
The patent transforms the fixed resonator configuration into a dynamic, adjustable structure. Motors are integrated into the resonator assembly, enabling the resonators to change their relative positions and orientations. This dynamic configuration maintains manufacturing simplicity through standardized components while providing flexible coupling adjustment capabilities
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 approach provides a large setting range for coupling bandwidths with stable, defined states, reducing passive intermodulation and manufacturing costs, while enabling flexible and precise adjustments of both coupling bandwidth and resonance frequency.
Implementation Method 1
a push rod (25'), on which a coupling element (27) can be adjusted in the direction of extension of the push rod (25'), parallel to a direction of extension of the inner conductor (4)
Implementation Method 2
adjacent resonators being electrically coupled to one another via coupling openings
Implementation Method 3
high-frequency filters with a coaxial design are used to split the transmitted and received signals
Data Source
Figure 1a
Figure 1b~1c
Figure 2a~2b
AI summary
An improved high frequency filter is characterized by among others the following features: an adjusting or sliding device (24, 25) is provided for changing the coupling bandwidth, the adjusting or sliding device (24, 25) comprises at least one adjusting means (251), on which at least one coupling element (27) is fastened, the coupling element (27) is assigned to a coupling opening (19') relative to a resonator (1; 1a, 1b, 1c, 1d), and the coupling element (27) is arranged in the resonator (1; 1a, 1b, 1c, 1d) relative to an assigned coupling opening (19') such that by shifting the adjustment or sliding device (24, 25), the adjustment means (25') and thus the coupling element (27) can be shifted between two extreme positions in which the coupling element (27) is positioned or shifted entirely or partially into the coupling opening (19') or entirely or partially out of the coupling opening (19') or away from the coupling opening (19').