Antenna Metal Frame with Gaps for Multi-Band Wireless
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Solution Overview
Problem
The challenge is to design an antenna with a wider bandwidth in a limited space, which is essential for smaller and thinner electronic devices that require increased functionality without compromising performance across various frequency bands.
Innovation Solution
The antenna structure incorporates a metal frame with strategically positioned gaps and feeding portions, along with switching circuits and inductors, to divide radiating portions and adjust impedance, enabling operation across multiple frequency bands including LTE-A, GPS, and WIFI/BLUETOOTH modes while maintaining efficient radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to meet smaller and thinner device requirements, then the device form factor is improved, but the bandwidth of the antenna deteriorates
Solution Approach 1:
The antenna is divided into multiple radiating elements (first radiating element, second radiating element, third radiating element, fourth radiating element) with different geometries and orientations. Each element contributes to different frequency bands, allowing the compact antenna to achieve wide bandwidth coverage by combining the radiation characteristics of segmented elements.
Solution Approach 2:
The patent utilizes three-dimensional space by positioning radiating elements at different heights above the ground plane and employing vertical polarization. The first and second radiating elements are arranged in one plane while the third and fourth elements are arranged in another plane, effectively using vertical dimension to pack more radiating structure into a smaller footprint.
2Adaptability or versatility
If multiple frequency bands are supported to increase functionality, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The antenna structure is designed as a multi-functional system where the same physical structure supports multiple frequency bands (LTE low band, LTE middle band, LTE high band, GPS, WIFI, Bluetooth) simultaneously. The different radiating elements and their combinations enable the antenna to serve multiple communication standards without requiring separate antenna systems.
Solution Approach 2:
Multiple radiating elements are merged into a single integrated antenna structure sharing common feeding networks and ground plane. The first and second radiating elements can operate together for LTE bands, while the third and fourth elements serve GPS and WIFI/Bluetooth functions, combining multiple functions in one unified antenna system.
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 configuration effectively covers a broad range of frequencies, including LTE-A low, middle, and high bands, as well as GPS and WIFI/BLUETOOTH bands, without affecting each other's performance, enhancing the device's ability to handle multiple communication modes efficiently.
Implementation Method 1
a first radiating portion E1, a second radiating portion E2, a third radiating portion E3, and a fourth radiating portion E4
Data Source
AI summary
An antenna structure of reduced size but able to cover first, second, and third LTE-A bands together with WI-FI and BLUETOOTH frequencies includes a metal frame defining at least two gaps. The gaps extend and pass completely through the metal frame, and divide the metal frame into radiating portions. At least one feeding portion is electrically coupled to each radiating portion. Each radiating portion can simultaneously activate first, second, and third operating modes for the radiation of signals in first, second, and third frequency bands.