PCB Antenna Reference Web for Dual-Band Board Adaptation
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Solution Overview
Problem
Existing antennas require dedicated adjustments for different circuit board geometries and environments, making them inefficient for multi-band wireless communication applications.
Innovation Solution
A dual-band printed circuit board antenna design featuring an electrically conducting antenna structure with a reference region and a reference region web, allowing for capacitive coupling and independent operation across various board sizes and environments without the need for adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antennas are used on circuit boards of various sizes, then the antenna can be implemented on different board geometries, but dedicated antenna adjustment is required for each board geometry and environment
Solution Approach 1:
The reference region is designed with a specific geometric configuration (elongated shape with length-to-width ratio between 2:1 and 10:1) that provides universal adaptability across different circuit board sizes and environments. This standardized reference region structure serves multiple functions: providing a consistent reference plane for impedance control, enabling capacitive coupling for dual-band operation, and eliminating the need for geometry-specific adjustments.
Solution Approach 2:
The invention controls the geometric parameters of the reference region (specifically the length-to-width ratio between 2:1 and 10:1) to achieve impedance matching and resonant frequency control. By carefully selecting these parameters, the antenna achieves consistent performance across different board geometries without requiring adjustment, as the parameter optimization compensates for variations in board size and environment.
2Reliability
If the reference region is made larger to improve antenna performance, then radiation characteristics improve, but the antenna structure becomes more sensitive to manufacturing tolerances and environmental influences
Solution Approach 1:
The invention optimizes the reference region dimensions by controlling the length-to-width ratio within a specific range (2:1 to 10:1). This parameter optimization achieves a balance where the reference region is sufficiently large to provide good radiation characteristics and impedance stability, while not being so large as to become excessively sensitive to manufacturing tolerances. The optimized geometry provides robust performance with minimal sensitivity to dimensional variations.
3Adaptability or versatility
If a dual-band antenna is designed to operate across multiple frequency bands, then wireless communication versatility improves, but the antenna structure becomes more complex requiring matching circuits
Solution Approach 1:
The reference region is designed to serve multiple functions simultaneously: it provides the reference plane for impedance control, acts as a resonant structure for frequency selection, and enables capacitive coupling for dual-band operation. The elongated geometric configuration with specific aspect ratio allows the same structure to support both frequency bands without requiring additional matching circuits, as the reference region itself provides the necessary resonant and coupling functions.
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 reliable and flexible operation across different frequency bands and environments, reducing the need for antenna structure changes and matching circuits, while maintaining performance insensitivity to manufacturing tolerances and environmental influences.
Implementation Method 1
The reference region web (143) can form a resonator, coupled capacitively to the antenna structure (113), with a second resonance frequency
Implementation Method 2
The reference region web (143) can form a resonator, coupled capacitively to the antenna structure (113), with a second resonance frequency
Data Source
AI summary
A printed circuit board antenna contains an electrically conductive antenna structure on an outer layer of a printed circuit board, the antenna structure has a first resonance frequency. The printed circuit board antenna additionally contains an electrically conductive feed line to the antenna structure and an electrically conductive reference region on the outer layer. The reference region completely encloses the antenna structure with the exception of an insulating feed recess for the feed line and an insulating web recess. The web recess is arranged on the antenna structure face facing away from the feed line, and the reference region has a reference region web on the antenna structure face facing away from the feed line. The reference region web forms a resonator which is capacitively coupled to the antenna structure and has a second resonance frequency.