Fork-Shaped Magnetodielectric Antenna for Low-Loss Miniaturization
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Solution Overview
Problem
Existing antennas face challenges in miniaturization for high-frequency applications due to high magnetic loss in ferrite materials, limiting their performance and size reduction.
Innovation Solution
A miniaturized fork-shaped patch antenna is developed using a magnetodielectric substrate and an electromagnetic radiator with a fork-shaped design, featuring a root and pair of forks separated by a slot, optimized for low loss and enhanced efficiency, allowing for reduced size and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ferrite materials are used in high frequency applications, then magnetic properties are improved, but magnetic loss increases
Solution Approach 1:
The patent changes the material parameter from conventional ferrite to magnetodielectric composite material, which maintains magnetic properties while significantly reducing magnetic loss at high frequencies. This material substitution resolves the contradiction by altering the fundamental composition to achieve both reliability and low energy loss.
Solution Approach 2:
The patent employs composite magnetodielectric materials that combine magnetic and dielectric properties in a single substrate. This composite approach allows the antenna to benefit from both magnetic field interaction and reduced dielectric loss, simultaneously improving reliability while minimizing energy loss at high frequencies.
2Volume of moving object
If antenna size is reduced for miniaturization, then compactness is improved, but performance deteriorates
Solution Approach 1:
The patent changes the electromagnetic parameters of the substrate by using magnetodielectric materials with optimized permittivity and permeability values. This allows the antenna to maintain resonant performance at lower frequencies even with reduced physical dimensions, achieving miniaturization without performance degradation.
Solution Approach 2:
The patent utilizes the magnetic dimension introduced by magnetodielectric materials to achieve miniaturization. By exploiting magnetic resonance effects in addition to traditional electric resonance, the antenna can be scaled down while maintaining performance through enhanced field confinement and interaction in the magnetic domain.
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 over 50% size reduction and improved efficiency, with an impedance bandwidth of 18%, suitable for high-frequency operations like 2.4 GHz and 5 GHz, and generates omni-directional radiation patterns.
Implementation Method 1
most ferrite materials exhibit relatively high magnetic loss at high frequencies
Implementation Method 2
The EM radiator includes an electrically conductive material disposed on an upper surface of the substrate
Data Source
AI summary
An antenna includes a substrate and an electromagnetic, EM, radiator. The substrate includes a magnetodielectric material. The EM radiator includes an electrically conductive material disposed on an upper surface of the substrate. The EM radiator further includes a root, and a pair of forks that are contiguous with and extend from the root along a first axis. The pair of forks are separated from one another by a slot in the electrically conductive material of the EM radiator to define a fork-shaped EM radiator. The root includes a bridge portion extending between the pair of forks in a direction of a second axis perpendicular to the first axis to electrically connect together the pair of forks.