Antenna Tuning Range Control for Faster Radio Wave Reception
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Solution Overview
Problem
Conventional radio wave receivers require a long time to find the optimum setting condition for the tuning circuit due to the need to finely adjust the tuning capacitance, which increases the number of steps needed for switching.
Innovation Solution
A radio wave receiver with a tuning unit that switches frequency characteristics in a stepwise fashion, using a search control unit to generate oscillation signals and selectively decide a specific adjustable range for the tuning circuit settings, thereby reducing the search time by narrowing down the range to match the frequency of the desired wave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the tuning capacitance is adjusted finely by switching one step at a time through the entire adjustable range, then the manufacturing precision of the resonance frequency is improved, but the time required to search for the optimum setting condition increases
Solution Approach 1:
The patent segments the entire adjustable range of the tuning circuit into multiple predetermined frequency ranges. By dividing the search space into segments, the system can efficiently locate the optimal resonance frequency without exhaustively searching every possible setting, thus reducing search time while maintaining precision through targeted fine-tuning within each segment.
Solution Approach 2:
The patent implements preliminary action by first searching within a predetermined frequency range before conducting a full-range search. This preliminary search narrows down the potential optimal settings, allowing subsequent fine-tuning to focus only on relevant areas, thereby significantly reducing the overall search time while ensuring accurate resonance frequency identification.
2Measurement precision
If the number of switching steps for tuning capacitance is increased to achieve fine adjustment, then the measurement precision of the resonance frequency is improved, but the productivity of the tuning process decreases
Solution Approach 1:
The patent applies segmentation by dividing the tuning process into stages: first searching within predetermined frequency ranges to identify candidate settings, then performing fine adjustments only in the identified range. This segmented approach maintains high measurement precision for resonance frequency while improving productivity by avoiding unnecessary switching steps in irrelevant frequency areas.
Solution Approach 2:
The patent implements partial action by performing exhaustive fine-adjustment switching only within predetermined frequency ranges rather than across the entire adjustable range. This partial searching strategy ensures accurate resonance frequency measurement where needed while significantly reducing the total number of switching operations, thereby improving overall tuning process efficiency.
3Adaptability or versatility
If the search range covers the entire adjustable range of the tuning unit, then the adaptability to find any optimum setting is improved, but the time required for the search process increases
Solution Approach 1:
The patent segments the entire adjustable range into multiple predetermined frequency ranges, each potentially containing optimal settings for different desired frequencies. This segmentation maintains adaptability by ensuring comprehensive coverage of all possible optimal points while reducing search time by confining the detailed search process to smaller, manageable segments rather than searching the entire range exhaustively.
Solution Approach 2:
The patent performs preliminary action by first identifying the relevant predetermined frequency range before conducting the full search. This preliminary identification step narrows down the search area based on the desired frequency, ensuring that the system maintains adaptability to find the optimum setting while significantly reducing the time required by limiting the subsequent search to only the necessary frequency range.
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 significantly shortens the process time for finding the optimum setting condition of the tuning circuit, avoiding unnecessary adjustments and minimizing the risk of incorrect settings due to noise, while ensuring the antenna can tune to multiple frequencies with high sensitivity.
Implementation Method 1
an oscillation unit to oscillate the antenna and a circuit section of the tuning unit
Implementation Method 2
making the resonance frequency of an antenna tune to the frequency of a desired wave by changing frequency characteristic of a tuning circuit connected to the antenna
Data Source
AI summary
Disclosed is a radio wave receiver including an antenna to receive a radio wave, a tuning unit to switch a frequency characteristic of the antenna in a stepwise fashion, an oscillation unit to oscillate the antenna and a circuit section of the tuning unit, a receiving process unit to carry out a signal process by extracting a signal of a desired wave among received signals which are received from the antenna, a search control unit in which the oscillation unit is made to generate an oscillation signal at the circuit section and in which the oscillation signal searches a setting condition of the tuning unit which is extracted in the receiving process unit by switching a setting of the tuning unit and a search range deciding unit to selectively decide an adjustable range in which the switching of the setting of the tuning unit is carried out by the search control unit so as to be a specific adjustable range which is a portion of an entire adjustable range of the tuning unit corresponding to a frequency of the desired wave.