Antenna Structure with Middle-High Band Reflector for Compact Wireless Devices
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Solution Overview
Problem
The complexity and large size of existing antenna structures in wireless communication devices hinder miniaturization efforts, making it difficult to achieve compact designs while maintaining effective wireless signal transmission and reception across various frequencies.
Innovation Solution
The proposed antenna structure incorporates a housing with a system ground plane, side frame, middle frame, and back board, along with a middle-high band reflector and switch circuits, which create multiple radiation portions and allow for adjustable configurations to cover multiple frequency bands by switching between different ground positions, enabling efficient multi-frequency operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna structures are used to cover multiple frequency bands, then frequency coverage is improved, but device size and structural complexity increase
Solution Approach 1:
The antenna structure is divided into multiple radiation portions (first radiation portion and second radiation portion) that can be independently configured. Each radiation portion can operate at different frequency bands, allowing the antenna to cover multiple frequencies without requiring separate antenna structures for each band, thus reducing overall device size while maintaining broad frequency coverage
Solution Approach 2:
The antenna structure is designed to perform multiple functions using a single integrated structure. The same antenna structure can operate across multiple frequency bands (LTE-A low, medium, and high frequencies) by switching between different radiation portions and ground plane configurations, eliminating the need for multiple dedicated antennas and reducing device volume
2Adaptability or versatility
If traditional antenna structures are used to cover multiple frequency bands, then frequency coverage is improved, but structural complexity increases
Solution Approach 1:
The antenna structure incorporates switch circuits that enable dynamic switching between different radiation portions and ground plane configurations. This dynamic reconfiguration allows the antenna to adapt to different frequency bands on demand, providing multi-frequency coverage through a single flexible structure rather than multiple fixed-configuration antennas, thereby reducing structural complexity
Solution Approach 2:
Multiple antenna functions are merged into a single integrated antenna structure. The first and second radiation portions, along with the switch circuits and ground planes, are combined into one unified structure that can perform multiple frequency band operations, reducing the overall number of components and simplifying the antenna system architecture
3Volume of moving object
If antenna structure is minimized for compact design, then device miniaturization is improved, but antenna performance may deteriorate
Solution Approach 1:
The antenna structure utilizes three-dimensional spatial arrangement with radiation portions extending in different directions and planes. The first radiation portion and second radiation portion are positioned at different locations and orientations within the device housing, allowing compact integration while maintaining effective radiation patterns and impedance matching across multiple frequency bands, thus preserving antenna performance in a miniaturized form factor
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 design allows for a compact wireless communication device that effectively covers a wide range of frequency bands, including LTE-A low, medium, and high frequencies, while maintaining a high screen-to-body ratio and providing optimal antenna performance in various environments.
Implementation Method 1
Antennas are for receiving and transmitting wireless signals at different frequencies
Data Source
AI summary
An antenna structure with wide radiation bandwidth in a reduced physical space includes a housing and a feed portion. The housing defines at least one gap and a slot that divides the housing into two or more radiation portions. The antenna structure further includes a middle-high band reflector (MHR). The MHR is connected to a side frame of the housing and extends along a direction parallel to one radiation portion. The MHR can also be positioned apart from one radiation portion. One end of the MHR is connected to a back board of the housing, the feed portion being electrically connected to one radiation portion. The back board and portions of the side frame without radiation portions are connected to form a system ground plane for grounding the antenna structure.