Multi-Port Antenna Tuning Circuit for Multimode Multiband Mobile Devices
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Solution Overview
Problem
The design of antennas for slim mobile devices supporting multiple air interface standards and frequency bands is challenging due to increased complexity, requiring an adaptive solution that can efficiently tune resonant modes to meet multimode multiband (MMMB) requirements.
Innovation Solution
An antenna tuning circuit with a switch and configurable circuit blocks that selectively couple interconnection nodes to adjust antenna resonant modes, allowing for flexible antenna topology changes and frequency band support by controlling switch and passive element configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multimode multiband antenna solution is implemented to support multiple air interface standards and frequency bands, then the adaptability and versatility of the mobile device is improved, but the device complexity and design difficulty increase
Solution Approach 1:
The patent implements dynamic antenna configuration by using switching circuits that can selectively connect different antenna elements and tuning components based on the required communication mode and frequency band. This allows the antenna system to adapt its electrical characteristics dynamically rather than being fixed, resolving the contradiction between supporting multiple standards and maintaining manageable complexity.
Solution Approach 2:
The patent designs a universal antenna structure with multiple ports and integrated tuning circuits that can serve multiple communication standards (2G, 3G, 4G) and frequency bands simultaneously. By creating a single multi-functional antenna system rather than separate antennas for each standard, the design reduces overall system complexity while maintaining high adaptability.
2Adaptability or versatility
If antenna tuning circuits with switchable configurations are added to adjust resonant modes, then the adaptability for different frequency bands is improved, but the device complexity increases
Solution Approach 1:
The patent divides the antenna system into multiple independently controllable segments or ports, each with its own switching and tuning capabilities. This segmentation allows selective activation and tuning of specific antenna elements based on the required frequency band, providing fine-grained control without requiring complete reconfiguration of the entire antenna system, thus managing complexity effectively.
Solution Approach 2:
The patent employs variable capacitors and inductors in the tuning circuits that can change their electrical parameters (capacitance and inductance values) to adjust the resonant frequency of the antenna. By changing these electrical parameters rather than physically reconfiguring the antenna structure, the system achieves frequency band adaptability with relatively simple circuit elements.
Data Source
AI summary
An antenna tuning circuit for setting an antenna resonant mode of an antenna structure includes a switch arranged to selectively couple a first interconnection node to a second interconnection node, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure. An antenna tuning method for setting an antenna resonant mode of an antenna structure includes generating a first control signal and selectively coupling a first interconnection node to a second interconnection node in response to the first control signal, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure.