Multi-band Antenna Structure with Segmented Radiating Sections
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Solution Overview
Problem
Existing antenna structures in wireless communication devices are complex and occupy significant space, making miniaturization challenging due to their size and complexity, especially when supporting multiple frequency bands like LTE-A.
Innovation Solution
The antenna structure incorporates a housing with a metallic side frame and a non-metallic backboard, featuring a unique configuration of radiating sections and coupling portions, along with a matching circuit and switching circuit, allowing for efficient impedance matching and frequency band switching, enabling the device to operate across multiple LTE-A frequency bands while minimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna structures are used to support multiple LTE-A frequency bands, then frequency band coverage is improved, but device space occupation and structural complexity increase
Solution Approach 1:
The patent implements a universal antenna structure where a single antenna system can operate across multiple LTE-A frequency bands (Band 1, Band 3, Band 7, Band 8, Band 20) through integrated switching circuits and matching networks. The antenna structure includes multiple radiating sections that can be selectively activated, allowing one antenna system to perform multiple frequency band functions, thereby reducing the need for separate antennas for each frequency band and minimizing overall space occupation.
Solution Approach 2:
The antenna structure is divided into multiple radiating sections (first radiating section, second radiating section, third radiating section) with distinct functional characteristics. Each radiating section can be independently controlled through switching circuits, allowing selective activation based on the required frequency band. This segmentation enables the antenna system to achieve multi-frequency band coverage while maintaining a compact overall structure, as only the necessary sections are activated for each operating condition.
2Adaptability or versatility
If traditional antenna structures are used to support multiple LTE-A frequency bands, then frequency band coverage is improved, but structural complexity increases
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure. The housing includes a metallic side frame and a non-metallic backboard that together form a unified antenna system with multiple radiating sections. Matching circuits and switching circuits are integrated within the same structural framework, merging what would traditionally require separate antenna assemblies into one cohesive unit, thereby reducing structural complexity while maintaining multi-frequency band capability.
Solution Approach 2:
The antenna structure incorporates switching circuits that dynamically reconfigure the antenna's electrical characteristics based on the required frequency band. The switching circuits can selectively connect different radiating sections and adjust matching network parameters, allowing the antenna system to adapt its structure electronically rather than requiring multiple fixed physical configurations. This dynamic reconfiguration simplifies the overall structure by using a single adaptable antenna system instead of multiple static antennas.
3Area of stationary object
If antenna structure is miniaturized to reduce space occupation, then device miniaturization is improved, but radiating efficiency may deteriorate
Solution Approach 1:
The patent applies local quality optimization by designing different radiating sections with specific characteristics suited for different frequency bands. The metallic side frame and non-metallic backboard are configured with specific geometric parameters (lengths, widths, positions) that are optimized for their respective frequency ranges. The matching circuits are locally adjusted for each radiating section to ensure optimal impedance matching and radiating efficiency within the compact structure, preventing efficiency deterioration despite miniaturization.
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 allows for compact design, effective signal transmission and reception across LTE-A frequency bands, enhancing miniaturization and maintaining high radiating efficiency, thus addressing the space constraints and complexity issues of traditional antenna structures.
Implementation Method 1
a matching circuit and switching circuit, allowing for efficient impedance matching and frequency band switching
Implementation Method 2
radiating sections and coupling portions, along with a matching circuit and switching circuit, allowing for efficient impedance matching and frequency band switching, enabling the device to operate across multiple LTE-A frequency bands
Data Source
AI summary
An antenna structure includes a housing and a feeding source. The housing forms a radiating portion, a first coupling portion, and a second coupling portion. The first coupling portion and the second coupling portion are grounded. The feeding source is electrically connected to the radiating portion for feeding current to the radiating portion and divides the radiating portion into a first radiating section and a second radiating section. When the feeding source supplies current, the current flows through the first radiating section and is coupled to the first coupling portion to activate a first operation mode and a second operation mode. When the feeding source supplies current, the current flows through the second radiating section and is coupled to the second coupling portion to activate a third operation mode and a fourth operation mode.