Multi-Band Split Ring Resonator Antenna Design
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Solution Overview
Problem
Conventional antennas using split ring resonators operate in only one frequency band, making them inadequate for wireless communication devices that require multiple frequency bands, such as those with GPS and wireless LAN functionality.
Innovation Solution
A compact antenna design incorporating multiple split ring resonators with different resonant frequencies, connected via a feed line with branch lines and a branch portion, allowing the antenna to operate across multiple frequency bands without increasing the device's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single split ring resonator is used, then the antenna size is reduced, but the antenna can operate in only one frequency band
Solution Approach 1:
The patent combines multiple split ring resonators with different resonant frequencies into a single antenna structure. The first and second split ring resonators are integrated on the same conductor plane, allowing the antenna to operate in multiple frequency bands simultaneously while maintaining a compact form factor.
Solution Approach 2:
The antenna structure is designed to perform multiple functions by incorporating resonators tuned to different frequencies. The feed line with branch portions can excite different resonators at different frequencies, enabling the antenna to serve multiple communication standards and frequency bands with a single device.
2Adaptability or versatility
If multiple split ring resonators are integrated into one antenna, then multi-frequency operation is achieved, but the feed line structure becomes more complex
Solution Approach 1:
The feed line is segmented into multiple branch lines, each connected to different split ring resonators. The feed line includes a first branch line connected to the first split ring resonator and a second branch line connected to the second split ring resonator, with branch portions that allow selective excitation of different resonators at different frequencies.
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 wireless communication devices to transmit and receive signals conforming to multiple communication standards within a smaller form factor, effectively addressing the limitations of single-frequency band antennas.
Implementation Method 1
The split ring resonators can interact with magnetic fields to control an effective magnetic permeability
Implementation Method 2
a first split ring resonator and a second split ring resonator that have different resonant frequencies
Data Source
AI summary
A small antenna operating at a plurality of frequency bands includes a first conductor plane in which a first split ring resonator and a second split ring resonator that have different resonant frequencies are formed and a feed line including a first branch line, a second branch line and a branch portion. Each of the split ring resonators includes a conductor region along an opening edge of an opening formed in the first conductor plane and a split portion cutting through a portion of the conductor region. One end of the first branch line is connected to the first split ring resonator and the other end extends to the branch portion across the conductor region; one end of the second branch line is connected to the second split ring resonator and the other end extends to the branch portion across the conductor region.