Frequency Tunable Antenna with Switched Inductor
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Solution Overview
Problem
Current mobile electronic devices require multiple antennas to support different wireless protocols and frequency ranges, leading to complexity in resource management and regional compatibility.
Innovation Solution
A frequency tunable antenna that resonates across LTE, GSM, UMTS, and WLAN bands, utilizing a switch and inductor configuration to adjust resonance frequencies, allowing for precise tuning of the lowest frequency band and accommodating various geographical regions with a single antenna design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are implemented to support different wireless protocols and frequency ranges, then coverage of different frequency bands is improved, but device complexity increases
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands (LTE, GSM, UMTS, WLAN) by using a parasitic element that can be tuned to different resonant frequencies. This universal antenna replaces multiple dedicated antennas, reducing device complexity while maintaining broad frequency band coverage adaptability.
Solution Approach 2:
The patent employs a dynamically adjustable parasitic element with variable inductance that can be tuned in real-time to resonate at different frequencies. This dynamic tuning capability allows the single antenna to adapt its resonant frequency to match different wireless protocols and regional requirements, resolving the contradiction between versatility and complexity.
2Adaptability or versatility
If different antennas are used for each region, then regional compatibility is improved, but resource management becomes more complex
Solution Approach 1:
The patent creates a universal antenna design that can serve multiple geographical regions by tuning the parasitic element's resonant frequency. Instead of requiring region-specific antennas, the single antenna can be configured to support different regional frequency allocations for LTE, GSM, and other bands, simplifying resource management while maintaining regional compatibility.
Solution Approach 2:
The patent changes the electrical parameters (inductance) of the parasitic element to adjust the resonant frequency according to regional requirements. By varying the inductance value, the antenna can be tuned to support different frequency allocations used in different geographical regions, eliminating the need for multiple region-specific antennas.
3Device complexity
If a tunable antenna is used to cover multiple bands, then the number of antennas is reduced, but tuning precision for specific channels may be compromised
Solution Approach 1:
The patent uses a parasitic element with variable inductance that can be precisely adjusted to achieve accurate resonant frequency tuning. By changing the inductance parameter of the parasitic element, the antenna can be tuned with high precision to specific channel frequencies within different bands, maintaining measurement precision while using a single antenna structure.
Solution Approach 2:
The patent replaces mechanical antenna length adjustment with an electrical tuning mechanism using variable inductance in the parasitic element. This electrical substitution allows for more precise and finer frequency adjustments compared to mechanical methods, enabling accurate channel-specific tuning while maintaining a compact single-antenna design.
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 efficient communication across multiple frequency bands with a single antenna, reducing the need for region-specific devices and simplifying resource management by precisely tuning the lowest frequency band to match specific channels in different regions.
Implementation Method 1
an inductor (207b) connected to a second radiating arm (202b) and ground (209), wherein the inductor (207b) is configured to adjust a resonant length of the second radiating arm (202b), thereby tuning at least one resonance of the antenna (200b)
Data Source
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AI summary
A frequency tunable antenna is provided. Specifically, a device is provided that includes: a ground; an antenna feed; a first radiating arm connected to the antenna feed; a second radiating arm capacitively coupled to the first radiating arm; a switch connected to the second radiating arm, the switch having an open position and a closed position; an inductor connected to the switch on one side and the ground on an opposite side, and, a processor in communication with the switch, the processor configured to open and close the switch to tune a resonance frequency of at least the second radiating arm thereby changing a resonant length of the second radiating arm depending on whether the inductor is connected thereto.