Variable Reactance Antenna for Multi-Network Miniaturization
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Solution Overview
Problem
Existing antenna apparatuses have a narrow resonance frequency band, making it difficult to miniaturize communication terminals while supporting multiple communication networks, as they require multiple antennas to cover a wide frequency range.
Innovation Solution
Incorporating a variable reactance device connected to the antenna apparatus at the highest signal density point, allowing the resonance frequency to vary and expand the resonance frequency band, enabling a single antenna to operate across multiple frequency bands and access various communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antenna apparatuses are installed to expand the resonance frequency band, then the frequency band coverage is improved, but the device size increases and miniaturization becomes difficult
Solution Approach 1:
The patent applies the dynamics principle by introducing a variable reactance device that can dynamically adjust the resonance frequency of the antenna apparatus. The reactance value changes based on control signals, allowing a single antenna to adapt its resonance frequency across multiple bands, thereby eliminating the need for multiple fixed-frequency antennas and achieving terminal miniaturization.
Solution Approach 2:
The patent implements parameter changes by modifying the reactance parameter of the antenna system through the variable reactance device. By controlling the reactance value to change, the resonance frequency is adjusted, enabling one antenna apparatus to cover multiple frequency bands that would otherwise require multiple antennas, thus solving the contradiction between frequency coverage and device size.
2Volume of moving object
If a single antenna apparatus is used to miniaturize the terminal, then the device size is reduced, but the resonance frequency band becomes narrow
Solution Approach 1:
The variable reactance device enables the single antenna apparatus to dynamically adjust its resonance frequency according to different communication networks. This dynamic adjustment capability allows the antenna to maintain versatility across multiple frequency bands while the terminal remains miniaturized with only one antenna apparatus.
Solution Approach 2:
The patent achieves universality by designing the antenna apparatus with a variable reactance device that can operate across multiple frequency bands. This multi-functional design allows a single antenna to perform the roles of multiple antennas, covering various communication networks including LTE, WiMAX, and WiFi, thereby maintaining adaptability while enabling terminal miniaturization.
3Reliability
If the resonance frequency is fixed for stable operation, then the operational stability is improved, but the ability to access multiple communication networks is reduced
Solution Approach 1:
The variable reactance device provides dynamic adjustability of the resonance frequency while maintaining operational stability through controlled transitions. The system can stably operate at any selected frequency within the supported bands, and the stability is maintained during frequency switching, thus achieving both reliable operation and multi-network compatibility.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the reactance value to shift the resonance frequency to match different communication networks. This parameter adjustment mechanism allows the antenna to maintain stable operation at each target frequency while being adaptable to multiple networks, resolving the contradiction between stability and 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
This solution enables the communication terminal to utilize a wider resonance frequency band with a single antenna, allowing access to multiple communication networks without the need for multiple antennas, thereby miniaturizing the terminal while maintaining effective communication performance.
Implementation Method 1
The antenna apparatus may operate at the resonance frequency band to transmit/receive the data
Data Source
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AI summary
Disclosed are to a communication terminal and an antenna apparatus thereof. The antenna apparatus includes an antenna device including a feeding point to which a signal is applied; and at least one variable reactance device connected to the antenna device. The communication terminal determines a communication network to access to drive the antenna apparatus corresponding to the determined communication network, and accesses to the determined communication network through the antenna apparatus to communicate. Accordingly, a resonance frequency band of the antenna apparatus is expanded.