Multi-band Antenna with Distributed Inductor for Space Reduction
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Solution Overview
Problem
The challenge is to design a multi-band antenna that can operate in various frequency bands while occupying minimal space within communication devices, as existing antennas are limited by the available space and require multiple antennas for different frequency bands.
Innovation Solution
A multi-band antenna configuration is proposed, featuring a grounding conductor, T-shaped first and second radiators, and an optional L-shaped third radiator, with strategically positioned radiating portions and a distributed inductor to enhance radiation coupling and reduce space occupancy, allowing for miniaturization and multi-frequency band usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different types of antennas are disposed in a communication device to achieve communication in different frequency bands, then the adaptability for different frequency bands is improved, but the device complexity and space occupancy increase
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated antenna structure that can operate across multiple frequency bands. The antenna comprises a radiator with specific geometric configurations (including straight sections and arc sections) that enable resonance at multiple frequency bands simultaneously, eliminating the need for multiple separate antennas and reducing overall system complexity
Solution Approach 2:
The antenna is designed with multi-functional capability to operate across multiple frequency bands (including but not limited to 700MHz, 900MHz, 1800MHz, and 2600MHz bands) using a single structure. The radiator's specific geometry with adjustable arc sections allows it to serve universal communication needs across different bands, making the antenna system adaptable without requiring additional antenna elements
2Adaptability or versatility
If various different types of antennas are disposed in a communication device to achieve communication in different frequency bands, then the adaptability for different frequency bands is improved, but the space occupancy increases
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated structure, reducing the total space required. By using one multi-band antenna instead of multiple single-band antennas, the overall footprint and space occupancy in the communication device is significantly reduced while maintaining full frequency band coverage
3Area of stationary object
If a single antenna is designed to operate in multiple frequency bands to reduce space occupancy, then the space efficiency is improved, but the manufacturing precision requirements increase due to complex geometric configurations
Solution Approach 1:
The antenna employs local quality variations in the radiator structure, specifically using arc sections with different radii of curvature at different locations to achieve multi-band resonance. The first and second arc sections have different geometric parameters that are optimized for specific frequency bands, allowing the antenna to achieve multi-band operation through localized geometric variations rather than requiring uniform high-precision manufacturing throughout the entire structure
Solution Approach 2:
The antenna achieves multi-band operation by changing geometric parameters (such as arc radii, segment lengths, and positioning) of the radiator structure. By adjusting these parameters, the antenna can be tuned to resonate at multiple frequency bands. This parameter-based approach allows for flexibility in design and manufacturing, as the same basic structure can be adapted to different frequency requirements by modifying geometric parameters rather than requiring completely different structures
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
The antenna achieves effective radiation across multiple frequency bands with reduced space requirements, enabling miniaturization of communication devices and improved performance through enhanced radiation paths and the inclusion of a distributed inductor.
Implementation Method 1
the inclusion of a distributed inductor
Data Source
AI summary
A multi-band antenna includes a grounding conductor, a first radiator, and a second radiator. The grounding conductor has a grounding function. The first radiator has a first radiating portion, a second radiating portion, and a feeding portion configured to connect to a signal source. The second radiator includes a third radiating portion, a fourth radiating portion, and a first grounding portion. A length of the third radiating portion or a length of the fourth radiating portion is longer than lengths of first radiating portion and the second radiating portion combined, and the third radiating portion or the fourth radiating portion is radiationally coupled with the first radiating portion and the second radiating portion.