Antenna Aperture Tuning With Coarse and Fine Frequency Adjustment
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Solution Overview
Problem
Wireless communication devices face challenges in maintaining adequate antenna performance across a range of frequencies due to limited space and increased feature sets, leading to reduced efficiency and performance issues.
Innovation Solution
An antenna system incorporating a radiating element, a feed, and a radiation-adjustment device with coarse- and fine-adjustment elements, controlled by an integrated-circuit chip and controller, allowing dynamic tuning of radiation characteristics to maintain efficiency across multiple frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the feature sets of devices are increased, then more communication capabilities are added, but the space available for each antenna is reduced
Solution Approach 1:
The patent implements dynamic aperture tuning by switching between different aperture configurations (e.g., different feed positions, different radiating element configurations) to adapt antenna performance to different frequency bands. This dynamic reconfiguration allows a single antenna structure to maintain adequate performance across multiple frequency bands despite limited physical space.
2Area of stationary object
If the antenna space is reduced, then more space is available for other hardware, but the antenna efficiency is reduced
Solution Approach 1:
The patent changes key antenna parameters (aperture configuration, feed position, element spacing) dynamically to maintain optimal radiation efficiency despite reduced physical size. By adjusting these parameters based on the operating frequency band, the antenna compensates for the reduced space and maintains adequate efficiency.
3Device complexity
If a single antenna is used, then the device complexity is reduced, but the performance over entire frequency range is inadequate
Solution Approach 1:
The patent designs a single antenna system that performs multiple functions across different frequency bands by implementing reconfigurable aperture configurations. The same physical antenna structure can be tuned to operate effectively in multiple frequency ranges, eliminating the need for separate antennas for different bands while maintaining adequate performance.
4Adaptability or versatility
If aperture tuning is added, then the frequency range performance is improved, but the device complexity increases
Solution Approach 1:
The patent segments the aperture tuning function into discrete, switchable configurations rather than continuous adjustment. This segmentation allows the system to achieve multi-band performance through a finite set of pre-defined aperture states, reducing the complexity of control mechanisms while maintaining adequate performance across frequency bands.
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 operation over a wide frequency range, adapting to changes in resonant frequency and environmental conditions, ensuring reliable communication across different frequency bands with improved radiation efficiency.
Implementation Method 1
The controller is configured to adjust the value of the fine-adjustment circuit dynamically in response to changing resonant frequency of the radiating element
Data Source
AI summary
An antenna system includes: a radiating element; a feed coupled to the radiating element at a first point on the radiating element and configured to convey energy to the radiating element; and a radiation-adjustment device coupled to the radiating element at a second point, configured to alter a radiation characteristic of the radiating element, and including: coarse-adjustment elements; an integrated-circuit chip including: switches, each coupled to a respective one of the coarse-adjustment elements where the coarse-adjustment elements are disposed external to the integrated-circuit chip; and a fine-adjustment circuit; the antenna system further including a controller communicatively coupled to the switches and to the fine-adjustment circuit, the controller configured to alter the radiation characteristic of the radiating element by selectively causing one or more of the switches to couple one or more of the coarse-adjustment elements to the radiating element, and by adjusting a value of the fine-adjustment circuit.