Antenna Matching Circuit for Multi-Band Communication
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Solution Overview
Problem
Conventional communication devices typically support only a single operating mode for their antennas, which limits their ability to meet the diverse frequency requirements of different communication protocols, leading to increased complexity and cost.
Innovation Solution
A communication device with multiple antenna units, each connected to a metal frame and a signal source via matching circuits, allowing for the generation of multiple operating frequency bands by adjusting bandwidths and frequency ratios through active circuits and parasitic matching circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single antenna structure is used, then the device complexity is reduced, but the adaptability to different communication protocols is insufficient
Solution Approach 1:
The patent implements multi-functionality by enabling a single antenna to operate in multiple modes (fundamental mode and higher order modes) through frequency ratio adjustment. The matching circuit can switch between different operating modes, allowing the antenna to support both sub-6GHz and millimeter wave frequency bands, thereby achieving protocol adaptability without adding separate antenna structures.
Solution Approach 2:
The patent applies parameter changes by adjusting the frequency ratio between fundamental mode and higher order mode through the matching circuit. By changing the electrical length and impedance parameters of the antenna structure, the system can switch between different operating frequency bands, enabling versatile communication protocol support while maintaining a single antenna structure.
2Adaptability or versatility
If multiple antenna structures are added to support different frequency bands, then the frequency coverage is improved, but the device complexity and cost increase
Solution Approach 1:
The patent makes the single antenna structure universal by enabling it to cover both sub-6GHz and millimeter wave frequency bands through mode switching capability. The matching circuit design allows the same physical antenna to serve multiple frequency purposes, eliminating the need for separate antennas for different bands and reducing overall system complexity.
Solution Approach 2:
The patent merges the functions of multiple antennas into a single antenna structure by combining fundamental mode and higher order mode operations. The integrated design integrates both frequency band operations into one unified antenna system, reducing the number of components and simplifying the overall antenna system while maintaining broad frequency coverage.
3Ease of manufacture
If the antenna structure is simplified to reduce cost, then the manufacturing cost is reduced, but the ability to meet diverse communication requirements is limited
Solution Approach 1:
The patent uses parameter changes in the matching circuit to enable a simple, low-cost antenna structure to achieve multiple communication protocols. By adjusting electrical length, impedance, and frequency ratio parameters, the same simple physical structure can be tuned to different frequency bands, maintaining manufacturing simplicity while achieving protocol versatility.
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
Enables the communication device to operate across multiple frequency bands, enhancing its communication capabilities and reducing complexity and cost by allowing for flexible frequency adjustments.
Implementation Method 1
a first antenna unit for generating a first operating frequency band of the communication device; and a second antenna unit for generating a second operating frequency band of the communication device
Data Source
AI summary
A communication device is provided. The communication device comprises a metal back cover electrically connected to a system ground plane; a first antenna unit for generating a first operating frequency band of the communication device; a second antenna unit for generating a second operating frequency band of the communication device. The first antenna unit includes a first signal source electrically connected to a first metal frame via a first matching circuit. The second antenna unit includes a second signal source electrically connected to a second metal frame via a second matching circuit. The first matching circuit and the second matching circuit are configured to adjust bandwidths and frequency ratios of the first operating frequency band and the second operating frequency band.