Tunable Resonator Filter With Movable Bar for Wide Frequency Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing the available spectrum due to the need for more frequency flexibility to meet growing demand and maintain quality of service.
Innovation Solution
A frequency adjustable filter is designed with a housing containing resonator elements and an adjusting bar mechanism, allowing for precise tuning of resonant frequencies by moving the adjusting bar within the resonator elements, facilitated by an actuator and driving shaft system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed frequency filters are used, then manufacturing precision is improved, but adaptability deteriorates
Solution Approach 1:
The patent implements a movable adjusting bar that can be positioned at different locations within the resonator cavity along the vertical axis. This dynamic positioning mechanism allows the filter's resonant frequency to be adjusted continuously across a wide bandwidth (e.g., 500 MHz to 2000 MHz) while maintaining manufacturing precision for each position. The adjusting bar's movement changes the effective electrical length of the resonator, enabling frequency tuning without requiring multiple fixed filters.
2Adaptability or versatility
If multiple fixed frequency filters are used to cover wide bandwidth, then frequency coverage is improved, but device complexity increases
Solution Approach 1:
The patent designs a single resonator structure with a movable adjusting bar that can operate across multiple frequency bands (e.g., supporting both 500-1000 MHz and 1500-2000 MHz ranges). This universal filter replaces what would traditionally require multiple separate fixed-frequency filters, thereby reducing device complexity while maintaining wide frequency coverage. The adjusting bar mechanism enables one filter to perform the function of several filters.
3Measurement precision
If the adjusting bar is positioned closer to the lid, then higher resonant frequency is achieved, but structural stability may deteriorate
Solution Approach 1:
The patent places the adjusting bar inside the resonator cavity, nested within the space between the lid and the base. The adjusting bar is constrained to move vertically along the central axis within the cavity boundaries. This nested arrangement ensures that the adjusting bar remains structurally supported by the resonator walls at all positions, maintaining structural stability even when positioned closer to the lid for higher frequency operation. The cavity structure provides mechanical support and guidance for the adjusting bar throughout its range of motion.
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 efficient use of the spectrum by allowing dynamic adjustment of resonant frequencies, enhancing the flexibility and performance of wireless communication systems.
Implementation Method 1
per a cavity forming a resonator, at least: a first resonator element extending from the lid towards a bottom of the cavity; a second resonator element extending from the bottom towards the lid; an adjusting bar extending inside an area in which the first resonator element and the second resonator element are overlapping
Data Source
AI summary
Arrangements for a frequency adjustable filter, which includes at least a housing, which includes one or more cavities closed by a lid above the housing are disclosed. In an arrangement, there is, per a cavity forming a resonator, a first resonator element extending from the lid, a second resonator element extending from the bottom, the second resonator element partially overlapping the first resonator element, an adjusting bar extending inside an area in which the first and the second resonator elements are overlapping, the adjusting bar being arranged to move within said area, a first hole either in the lid or in the bottom, a driving shaft, and an actuator arranged to move the adjusting bar through the first hole by means of the driving shaft. At least the first resonator element, the second resonator element and the adjusting bar are positioned to have a common vertical central axis.