Cover-Type PCB Antenna for Compact Resonance Tuning
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Solution Overview
Problem
Conventional antennas are not suitable for miniaturization, particularly chip antennas, and they are costly, limiting their application in small communication modules.
Innovation Solution
A cover-type antenna design incorporating a capacitance auxiliary pattern, utilizing a shield-like first radiation part and a second radiation part that extends through the PCB, allowing for miniaturization and fine tuning of resonance points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional antenna design (PCB pattern, chassis-type, or chip antenna) is used, then the antenna can be implemented, but the size cannot be miniaturized and costs increase
Solution Approach 1:
The patent combines the antenna radiation elements with the PCB structure itself. The first radiation part is formed on the first surface of the PCB, the second radiation part is formed on the second surface, and they are electrically connected through the PCB substrate, merging the antenna function with the existing PCB structure to eliminate separate antenna components and reduce cost
Solution Approach 2:
The patent transitions from conventional two-dimensional PCB pattern antennas to a three-dimensional structure by extending radiation elements across both surfaces of the PCB and utilizing the PCB thickness dimension. This allows for more compact antenna designs that achieve resonant lengths without requiring large planar areas
2Volume of moving object
If the antenna size is reduced for miniaturization, then the antenna fits small communication modules, but the radiation efficiency and resonance tuning capability deteriorate
Solution Approach 1:
The patent divides the antenna into multiple segments: a first radiation part on the first surface, a second radiation part on the second surface, and a capacitance auxiliary pattern. This segmentation allows each part to contribute to the overall resonance and radiation, enabling compact sizing while maintaining efficiency through distributed current paths
Solution Approach 2:
The patent uses a capacitance auxiliary pattern to adjust the resonant frequency and impedance characteristics of the compact antenna. By modifying the capacitance value through the auxiliary pattern geometry, the antenna can be tuned to achieve optimal resonance and radiation efficiency despite the reduced physical dimensions
3Volume of moving object
If a chip antenna is used to achieve miniaturization, then the antenna size is reduced, but the manufacturing cost increases
Solution Approach 1:
The PCB substrate serves multiple functions: it provides mechanical support for the circuit, acts as the radiation element itself through the first and second radiation parts, and provides the capacitance for resonance tuning. This multi-functionality eliminates the need for separate chip antenna components while achieving miniaturization
Solution Approach 2:
The PCB structure serves itself as the antenna by forming radiation parts directly on its surfaces and utilizing its inherent dielectric properties for capacitance. This self-service approach eliminates the need for external antenna components and reduces manufacturing complexity and cost
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 design reduces antenna size, enhances radiation efficiency, and allows for fine tuning of resonance points, even in varying environments, thus optimizing performance in small communication modules.
Implementation Method 1
a capacitance auxiliary pattern, configured to be electrically connected to the first radiation part and the second radiation part
Data Source
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AI summary
An antenna according to one embodiment of the present invention comprises: a first radiation part formed in a cover shape on a first surface of a printed circuit board; and a second radiation part penetrating the printed circuit board from one end of the first radiation part and extending onto a second surface of the printed circuit board, wherein the second radiation part includes a radiation pattern on the second surface of the printed circuit board, and the radiation pattern is spaced apart at a predetermined distance from a grounding pattern formed inside the printed circuit board or on the first surface of the printed circuit board.