Semiconductor Antenna Tuner for Broadband Impedance Matching
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Solution Overview
Problem
Existing antenna impedance matching solutions are limited to narrowband frequency ranges, require redesign for different user equipment, occupy large PCB areas, and are costly, failing to meet the requirements of full-frequency band broadband systems.
Innovation Solution
An antenna impedance matching apparatus comprising a semiconductor chip with multiple adjustable capacitors and switches, along with external impedance components, allows flexible tuning by switching connections to expand frequency coverage and reduce PCB area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple adjustable capacitor chips and fixed inductors are combined to implement an antenna tuner, then impedance matching can be achieved, but the frequency tuning range is narrow and the structure is complex
Solution Approach 1:
The patent combines multiple adjustable capacitors and switches onto a single semiconductor chip, integrating what was previously distributed across multiple chips into one unified component. This merging reduces structural complexity while maintaining the ability to achieve broadband impedance matching across multiple frequency bands.
Solution Approach 2:
The semiconductor chip is designed with multiple adjustable capacitors and switches that can be configured in different topologies (series, parallel, bridged) to support multiple frequency bands. This multi-functional design allows the same chip to serve as a universal impedance matching solution across different frequency ranges, improving adaptability without requiring separate tuners for each band.
2Adaptability or versatility
If external fixed capacitor/inductor components are replaced to cover broadband frequency range, then frequency coverage expands, but development cycle extends and cost increases
Solution Approach 1:
The patent implements dynamic reconfigurability through switches that can change the topology of the impedance matching network in real-time. This dynamic capability allows the same hardware to adapt to different frequency bands and antenna characteristics without physical replacement or redesign, enabling broadband coverage while avoiding the time-consuming process of developing separate matching networks for each frequency range.
Solution Approach 2:
The semiconductor chip provides electronically adjustable capacitor values that can be dynamically changed through control signals. This parameter adjustability allows the impedance matching network to be optimized for different frequency bands and antenna impedances without changing physical components, significantly reducing development time and enabling a single chip to cover broad frequency ranges.
3Reliability
If a fixed topology network is used for impedance matching, then optimal performance is achieved for specific antenna characteristics, but the solution cannot be flexibly applied to different user equipments
Solution Approach 1:
The patent employs a dynamically reconfigurable impedance matching network where switches can change the topology between series, parallel, and bridged configurations. This dynamic capability allows the system to adapt to different antenna characteristics and impedance values across various user equipments while maintaining optimal matching performance, eliminating the need for fixed topology designs that are limited to specific applications.
Solution Approach 2:
The semiconductor chip incorporates control logic that can respond to impedance sensing feedback and automatically adjust the switch states and capacitor values to achieve optimal matching. This feedback mechanism ensures reliable performance across different user equipments by continuously adapting the matching network to the actual antenna conditions, rather than relying on a fixed topology designed for a specific scenario.
Data Source
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AI summary
The present invention provides an antenna impedance matching apparatus (100), semiconductor chip (110), and method. The apparatus (100) includes: a semiconductor chip (110), including multiple adjustable capacitors (111, 211, 212, 213) and multiple switches (112, 221, 222, 223); and at least one impedance component (120), located outside the semiconductor chip. The semiconductor chip (110) is coupled to the at least one impedance component (120) and to an input terminal and an output terminal of the antenna impedance matching apparatus through multiple terminals (231, .... 239). The input terminal and the output terminal of the antenna impedance matching apparatus are respectively coupled to a radio frequency circuit (130) and an antenna (140). The multiple switches (112, 221, 222, 223) are configured to, under control of a control signal, switch a connection between the multiple adjustable capacitors (111, 221, 222, 223) and the at least one impedance component (120). Values of the multiple adjustable capacitors (111, 221, 222, 223) are adjusted by an adjustment signal, so as to tune impedance matching of the antenna.