Metal-Frame Terminal Antenna Tuning for Hand-Held Radiation Stability
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Solution Overview
Problem
Existing antennas disposed on the side of electronic devices face challenges in maintaining good radiation performance in both free space and hand phantom scenarios, with current solutions either performing poorly in free space or experiencing significant efficiency drops in hand phantom scenarios.
Innovation Solution
A terminal antenna design that utilizes a metal frame with strategically placed gaps to form a radiator, incorporating electrical connection points and tuning components like capacitors and inductors to excite both common and differential modes, ensuring optimal radiation performance in various scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna designs are used on the side of electronic devices, then the structure is simple, but the radiation performance deteriorates in either free space or hand phantom scenarios
Solution Approach 1:
The antenna structure is segmented into multiple functional parts: a radiator with multiple electrical connection points (first, second, and third connection points), tuning components (first and second tuning components), and feed elements. This segmentation allows each part to be optimized independently for its specific function, enabling the antenna to achieve good radiation performance in both free space and hand phantom scenarios while maintaining a manageable overall structure.
Solution Approach 2:
The antenna incorporates tuning components that can be adjusted to dynamically optimize performance across different operating conditions. The first tuning component connected to the first electrical connection point and the second tuning component connected to the third electrical connection point allow dynamic adjustment of electrical parameters to maintain reliable radiation performance whether the device is in free space or held in a hand phantom scenario.
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
The antenna achieves good radiation performance in both free space and hand phantom scenarios by effectively exciting common and differential modes, maintaining efficient wireless communication capabilities across different operating bands.
Implementation Method 1
the first tuning component includes a first capacitor. In this way, connecting a capacitor in series on a feeder link can excite a left-handed mode.
Implementation Method 2
the second tuning component includes at least one second capacitor, and a capacitance of the second capacitor is determined depending on an operating band
Implementation Method 3
the second tuning component includes at least one first inductor, and an inductance of the first inductor is determined depending on an operating band
Implementation Method 4
through sequential disposing of the foregoing feed and ground points on the metal-frame antenna, a CM mode and a DM mode can both be excited, thereby delivering good radiation performance both in free space and on hand phantoms.
Data Source
AI summary
The application discloses a terminal antenna and an electronic device. The terminal antenna is used in the electronic device, the electronic device is provided with a metal frame, and the metal frame is provided with a first gap and a second gap. A metal segment between the first gap and the second gap forms a first radiator, and the first radiator and other metal segment are not connected to each other. The antenna includes the first radiator. A first electrical connection point, a second electrical connection point, and a third electrical connection point are sequentially provided on the first radiator. The first electrical connection point is coupled to a feed through a first tuning component, the second electrical connection point is coupled to a reference ground, and the third electrical connection point is coupled to the reference ground through a second tuning component.