High Frequency Filter with Transverse TM Mode Coupling
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Solution Overview
Problem
Existing high-frequency filters designed for TM modes in the transverse direction are complex, leading to larger deviations in filter properties during production and require more space to achieve desired filter properties.
Innovation Solution
A high-frequency filter design featuring resonator chambers connected via coupling openings in separating devices, with dielectrics and tuning elements that allow for adjustable resonator coupling and frequency tuning, ensuring compactness and simplicity while maintaining filter performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing high-frequency filter designs are used, then filter performance can be achieved, but the structure becomes complex and requires more space
Solution Approach 1:
The filter is divided into multiple resonator chambers separated by separating devices, each chamber containing a dielectric resonator. This segmentation allows independent tuning and coupling control, simplifying the overall design while maintaining performance
Solution Approach 2:
The patent transitions from conventional longitudinal coupling to transverse coupling by arranging resonators side-by-side and coupling them through separating devices perpendicular to the signal propagation direction, reducing the filter's length in the signal direction
2Reliability
If existing high-frequency filter designs are used, then filter performance can be achieved, but production deviations increase
Solution Approach 1:
The patent introduces adjustable coupling openings in the separating devices that allow post-manufacturing tuning of coupling coefficients. This enables compensation for production variations and achieves precise filter characteristics despite manufacturing tolerances
Solution Approach 2:
The filter incorporates tunable elements including adjustable coupling openings and frequency-tunable resonators, allowing the filter characteristics to be optimized after manufacturing to compensate for production deviations
3Volume of moving object
If compact design is implemented, then space is saved, but coupling control becomes difficult
Solution Approach 1:
By segmenting the filter into modular resonator chambers with standardized separating devices, the patent achieves compactness while maintaining accessible coupling points through the separating devices
Solution Approach 2:
The separating devices act as intermediary elements between adjacent resonator chambers, providing controlled coupling paths that are easily adjustable through the coupling openings without requiring direct contact between resonators
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 compactness, simplicity, and cost-effectiveness while minimizing deviations in filter properties, enabling efficient transmission of TM modes with precise frequency and coupling bandwidth adjustments.
Implementation Method 1
particularly suitable for transmitting TM modes in the transverse direction. When speaking of the transmission of TM modes or TM waves, then only the electric field has components in the direction of propagation and the magnetic fields are only in the plane perpendicular to the direction of propagation
Implementation Method 2
each of the n resonators (6 1, 6 2, ..., 6 n) having at least one resonator chamber (7 1, 7 2, ..., 7 n). Within each resonator chamber (7 1, 7 2, ..., 7 n) there is at least one dielectric (8 1, 8 2, ..., 8 n)
Data Source
Figure 1~2
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Figure 4
AI summary
A high-frequency filter (1) consists of a housing (2) comprising n resonators (61, 62, ..., 6n), each containing at least one dielectric (81, 82, ..., 8n). The n resonators (61, 62, ..., 6n) are arranged along a central axis (12). The n resonators (61, 62, ..., 6n) are separated from each other by at least n-1 isolating devices (91, 92, ..., 9n-1). The n-1 isolating devices (91, 92, ..., 9n-1) have coupling openings (10) through which coupling occurs perpendicular or with a component predominantly perpendicular to the H-field (20). A first signal line connection (301) is inserted into the first resonator chamber (71) via a first opening in the housing (2) and is in contact there with the respective dielectric (81). In addition or alternatively, a second signal line connection (302) is inserted into the nth resonator chamber (7n) via a second opening in the housing (2) and is in contact with the respective dielectric (8n) there.