Antenna Tuning Component With Switchable Reactance for Multi-Band Phones
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Solution Overview
Problem
The challenge in mobile phone design is to accommodate multiple frequency bands in a limited space, as a single antenna struggles to cover a wide range of frequencies, necessitating the deployment of multiple antennas, which complicates terminal antenna design.
Innovation Solution
A tuning component comprising pins, a reactance element, and a switch assembly, controlled by a signal controller, allows for various circuit states and capacitance values, enabling efficient tuning of antennas to cover multiple frequency bands without increasing the component's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are deployed to cover multiple frequency bands, then frequency band coverage is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent employs a tuning component with switchable circuit states that can dynamically adjust the antenna's electrical characteristics. The switch assembly can switch between different internal branches (first internal branch and second internal branch) to change the antenna's resonant frequency and impedance, enabling a single antenna to adaptively cover multiple frequency bands without requiring multiple fixed antennas.
Solution Approach 2:
The tuning component changes electrical parameters (impedance, resonant frequency) by switching between different circuit configurations. The reactance element and switch assembly work together to modify the antenna's electrical length and impedance matching, allowing the same physical antenna structure to operate across multiple frequency bands by parameter adjustment rather than physical reconfiguration.
2Adaptability or versatility
If multiple antennas are deployed to cover multiple frequency bands, then frequency band coverage is improved, but the available space for antenna placement is reduced
Solution Approach 1:
The tuning component enables a single antenna to perform multiple functions by covering multiple frequency bands. The switch assembly and reactance element allow the antenna to be tuned to different frequency ranges, making one antenna structure universal for multiple communication standards and frequency bands, thereby eliminating the need for separate antennas for each frequency band.
Solution Approach 2:
The antenna system is made dynamic through the tuning component that can reconfigure its electrical characteristics in real-time. The switchable circuit states allow the antenna to adapt its resonant frequency and impedance to match different frequency bands, enabling one physical antenna to replace multiple static antennas and save space.
3Adaptability or versatility
If a tuning component with multiple circuit states is used, then frequency band coverage is improved, but the tuning circuit complexity increases
Solution Approach 1:
The patent combines the reactance element and switch assembly into an integrated tuning component with a unified structure. The first internal branch and second internal branch are merged into a single component housing, sharing common elements like the reactance element and control logic. This integration reduces the overall circuit complexity compared to using separate tuning components for each frequency band.
Solution Approach 2:
The tuning component is segmented into distinct functional modules: the reactance element for impedance adjustment, the switch assembly for circuit state control, and the internal branches for different frequency configurations. This modular segmentation allows for systematic design and control, making the complex tuning function more manageable and easier to implement than a monolithic tuning circuit.
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 solution reduces the headroom requirement for antennas, allowing for a compact design that effectively covers multiple frequency bands, improving tuning performance and reducing the size of the antenna apparatus.
Implementation Method 1
the reactance element is a variable capacitor; and the signal controller is further configured to switch a capacitance value of the reactance element
Implementation Method 2
the reactance element is a variable inductor; and the signal controller is further configured to switch an inductance value of the reactance element
Data Source
AI summary
This application provides a tuning component, including: a plurality of pins, where the plurality of pins include a first pin, a second pin, a third pin, and a fourth pin; a reactance element, where the reactance element is connected between the first pin and the second pin; a switch assembly, disposed between the third pin and the fourth pin; a first internal branch, where one end of the first internal branch is connected to the third pin; and a second internal branch, where one end of the second internal branch is connected to the fourth pin, where the other end of the first internal branch is connected to the other end of the second internal branch to form an integrated end, and the integrated end is connected to the first pin. This application further provides an antenna apparatus and a terminal device, to help reduce headroom requirement of antenna.