Compact Antenna System for LTE and 5G Wideband Operations
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Solution Overview
Problem
Designing a small-size, wideband antenna system that effectively covers various frequency bands for mobile communication devices, particularly for LTE and 5G operations, is a critical challenge due to the limitations of existing antenna designs in terms of bandwidth and communication quality.
Innovation Solution
The proposed antenna system consists of a ground plane, nonconductive support elements, and antenna elements arranged in specific shapes and configurations to cover wide operation frequency bands, including multiple frequency intervals from 700 MHz to 5000 MHz, with each antenna element excited by a signal source and optimized for size and shape to achieve wideband operations and high isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small-size antenna is designed, then the device compactness is improved, but the bandwidth coverage deteriorates
Solution Approach 1:
The antenna system is divided into multiple antenna elements (first antenna element, second antenna element, etc.) each handling different frequency intervals. The first antenna element covers 700-960 MHz and 1710-2170 MHz, while the second antenna element covers 2300-2690 MHz and 3300-5000 MHz, allowing each element to be optimized for specific bands while collectively achieving wideband coverage in a compact form factor
Solution Approach 2:
The patent employs three-dimensional spatial arrangement of multiple antenna elements with different orientations and configurations. The antenna elements are positioned at specific locations and angles to achieve wideband operations across multiple frequency intervals, transforming a two-dimensional planar design into a three-dimensional structure that provides both compact size and extensive bandwidth coverage
2Adaptability or versatility
If multiple frequency bands are covered, then the communication versatility is improved, but the antenna complexity increases
Solution Approach 1:
Each antenna element is designed with multi-functional capability to operate across multiple frequency intervals. The first antenna element simultaneously supports 700-960 MHz and 1710-2170 MHz bands, while the second antenna element supports 2300-2690 MHz and 3300-5000 MHz bands, reducing the need for separate dedicated antennas for each frequency band
Solution Approach 2:
The antenna system employs a nested structure where multiple antenna elements are integrated within a compact housing. The first and second antenna elements are arranged in a space-efficient configuration, with each element containing multiple radiating components that are nested or closely positioned to achieve wideband coverage without proportionally increasing the overall antenna assembly size
3Volume of moving object
If antenna elements are closely positioned, then the device compactness is improved, but the isolation between antenna elements deteriorates
Solution Approach 1:
The antenna elements are positioned asymmetrically with respect to each other, with different orientations and angular arrangements. The first antenna element and second antenna element are configured at specific angles and locations that provide electromagnetic isolation while maintaining a compact overall structure, preventing mutual interference despite close positioning
Data Source
AI summary
An antenna system includes a ground plane, a first nonconductive support element, a first antenna element, a second nonconductive support element, and a second antenna element. The first nonconductive support element is adjacent to the ground plane. The first antenna element is distributed over the first nonconductive support element. The first antenna element is excited by a first signal source. The second nonconductive support element is adjacent to the ground plane. The second antenna element is distributed over the second nonconductive support element. The second antenna element is excited by a second signal source. Both the first antenna element and the second antenna element can cover a wide operation frequency band of LTE/5G.