Metal Frame Antenna Paths for Dual-Band Radiation in Metal Casings
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Solution Overview
Problem
Electronic devices with metal casings face challenges in achieving both aesthetic appeal and good antenna radiation performance due to the difficulty of integrating antennas with metal textures.
Innovation Solution
The design incorporates a metal frame with slots and radiators, forming multiple antenna paths that utilize the metal frame as a radiator, allowing for good radiation performance and aesthetic appeal by using the metal material for the casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an exposed antenna design is used on a metal casing, then antenna radiation performance is achieved, but aesthetic appearance with metal texture is compromised
Solution Approach 1:
The patent merges the antenna structure with the metal frame by making the frame itself part of the antenna path. The metal frame includes disconnecting parts, connecting parts, and ground terminals that form a complete antenna circuit, eliminating the need for separate exposed antennas while maintaining both aesthetic appearance and radiation performance
Solution Approach 2:
The metal frame serves dual functions: it provides the structural support for the device and simultaneously acts as the antenna radiation element. The frame's metallic properties enable it to function as both a mechanical component and an electromagnetic radiation structure, achieving multi-functionality
2Shape
If the metal frame is used as part of the antenna radiator, then aesthetic appearance is improved, but antenna path length control becomes more difficult
Solution Approach 1:
The antenna path is segmented into multiple controllable sections within the metal frame: disconnecting parts, connecting parts, and ground terminals. Each segment can be independently designed and adjusted to achieve the required total path length for specific frequency bands, making precision control more manageable
Solution Approach 2:
The patent adjusts antenna path length by changing geometric parameters of the frame components, such as the position and size of disconnecting parts and connecting parts. This allows tuning of the antenna path length to match required wavelengths for different frequency bands while maintaining the metal frame's aesthetic appearance
3Adaptability or versatility
If multiple antenna paths are formed in the metal frame, then frequency band coverage is improved, but device complexity increases
Solution Approach 1:
The metal frame is designed to support multiple antenna paths simultaneously, with each path capable of operating at different frequency bands. The same frame structure serves as the antenna system for multiple frequency ranges, achieving multi-functionality without requiring separate antenna structures for each band
Solution Approach 2:
The antenna system provides dynamic adaptability by supporting multiple resonant frequencies through the different antenna paths. The metal frame can be tuned to operate at different frequency bands by adjusting which antenna paths are active, enabling the device to adapt to different communication requirements
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 solution provides good antenna radiation performance with omnidirectional coverage and allows for a metal casing design, overcoming issues of coupling spacing and assembly alignment, while enabling impedance matching adjustments for customization.
Implementation Method 1
the first terminal and the second terminal of each radiator, the first part of the corresponding disconnecting part, the corresponding first connecting part and the ground terminal of the metal bottom plate form a first antenna path, and the first antenna path radiates at a first frequency band
Data Source
AI summary
An electronic device including a metal bottom plate, a metal frame and at least one radiator is provided. The metal bottom plate includes at least one ground terminal. The metal frame includes at least one slot, at least one disconnecting part, at least one first connecting part and at least one second connecting part. The disconnecting part includes a first part and a second part. Each radiator includes a first terminal and a second terminal. The second terminal is connected to a junction between the first part and the second part. The first terminal, the second terminal, the first part, the first connecting part and the ground terminal form a first antenna path radiating at a first frequency band. The first terminal, the second terminal, the second part, the second connecting part and the ground terminal form a second antenna path radiating at a second frequency band.