Antenna Module Using EBG Element for Compact Single-Directional Radiation
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Solution Overview
Problem
Conventional antenna modules with circular polarization antennas are too large due to the quarter wave length distance required between the reflector and the slot antenna, making them unsuitable for use in portable electronic devices.
Innovation Solution
An antenna module incorporating an electromagnetic band gap (EBG) element directly connected to the slot antenna using adhesive material, which provides single directional radiation and reduces the module's volume by eliminating the need for a quarter wave length distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reflector is disposed at a quarter wave length distance from the slot antenna to provide single directional radiation, then the radiation directionality is improved, but the antenna module size becomes too large for portable devices
Solution Approach 1:
The patent changes the fundamental parameter of reflector positioning from a fixed quarter-wave distance to a variable distance enabled by EBG structures. The EBG elements allow the reflector to be placed at any distance while maintaining single-directional radiation performance, thus resolving the contradiction between achieving proper radiation directionality and minimizing antenna module size for portable applications
Solution Approach 2:
The EBG (electromagnetic band gap) structures serve as an intermediary between the slot antenna and the reflector. These periodic structures modify the electromagnetic field distribution and enable single-directional radiation without requiring the traditional quarter-wave spacing, thus allowing compact antenna design while maintaining radiation performance
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 EBG element enables single directional radiation, allowing the antenna module to be compact enough for use in portable electronic devices while maintaining improved transmission efficiency.
Implementation Method 1
an antenna module (1000), and in particular relates to an antenna module providing single directional radiation
Implementation Method 2
The EBG element is directly connected to the slot antenna with adhesive material, rather than kept at a quarter wavelength from the slot antenna distance
Data Source
AI summary
An antenna module is provided. The antenna module includes an antenna and an EBG element. The EBG element includes an EBG ground layer, a plurality of reflective units and a plurality of connection posts. The reflective units are arranged in a matrix, a gap is formed between the nearby reflective units, and the reflective units are corresponding to the antenna. Each connection post connects the reflective unit to the EBG ground layer.