Stacked Multi-Band Antenna Structure for Space-Saving Isolation
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Solution Overview
Problem
Communications terminals face the challenge of antennas occupying large space due to the need for independent antennas in different frequency bands, which complicates design and increases overall size.
Innovation Solution
The proposed antenna structure includes two stacked or disposed antenna radiators with a gap between them, where one radiator is designed for a lower resonance band and the other for a higher resonance band, using impedance matching circuits to block signals and improve isolation, allowing both to share space and reduce overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent antennas are designed for different frequency bands, then communication functionality in multiple bands is improved, but antenna space occupation increases
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that supports multiple frequency bands (e.g., 700MHz, 900MHz, 1800MHz, 2100MHz, 2600MHz) simultaneously, eliminating the need for separate independent antennas for each band and thereby reducing overall antenna space occupation
Solution Approach 2:
The integrated antenna is designed to perform multiple functions across different frequency bands through a single structure, making it a universal antenna solution that replaces multiple specialized antennas while maintaining communication functionality in all required bands
2Adaptability or versatility
If independent antennas are designed for different frequency bands, then communication functionality in multiple bands is improved, but device complexity increases
Solution Approach 1:
By merging multiple antenna designs into one integrated structure, the patent reduces the number of separate components and simplifies the overall antenna system architecture, thereby reducing device complexity despite supporting multiple frequency bands
3Reliability
If ground wall width is increased to solve isolation between antennas, then antenna isolation is improved, but antenna space occupation increases
Solution Approach 1:
The patent achieves antenna isolation within an integrated antenna structure through internal design optimizations such as feed point positioning and impedance matching, eliminating the need for additional ground wall space that would be required if separate antennas were used, thereby maintaining isolation while reducing space occupation
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 enables efficient operation in multiple frequency bands while minimizing antenna space, improving isolation and reducing the overall size of the communications terminal.
Implementation Method 1
a length of the first antenna radiator is greater than a length of the second antenna radiator, and a resonance band of the first antenna radiator is less than a resonance band of the second antenna radiator
Data Source
AI summary
An antenna structure includes a first antenna radiator, a second antenna radiator, and a first impedance matching circuit. The first antenna radiator and the second antenna radiator are disposed in a laminated or opposite manner, and a gap exists between the first antenna radiator and the second antenna radiator. The length of the first antenna radiator is greater than that of the second antenna radiator, and the resonant frequency band of the first antenna radiator is smaller than that of the second antenna radiator. The first end of the first antenna radiator is grounded, a first feeding point is provided on the first antenna radiator. The first end of the second antenna radiator is grounded, a second feeding point is provided on the second antenna radiator, and the second feeding point is connected to a second signal source.