Single-Path PCB Dual-Frequency Antenna With Capacitive Tuning
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Solution Overview
Problem
Current dual-frequency antennas are large in size due to multi-branch wire structures and have difficulty in adjusting their resonance frequency bands.
Innovation Solution
A dual-frequency antenna design utilizing a single-path metal conduction band on a PCB with capacitors connected in series, where the metal conduction band is arranged within a clearance area and connected to the PCB ground, allowing for adjustment of high-frequency resonance by modifying the band length and low-frequency resonance by adjusting capacitor values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-branch wire structures are used to achieve dual-frequency resonance, then dual-frequency resonance is achieved, but the antenna size becomes too large
Solution Approach 1:
The patent merges the functions of multiple branches into a single conduction band by strategically placing capacitors at specific positions along the band. This single conduction band structure integrates the resonance functions that would otherwise require separate branches, thereby achieving dual-frequency resonance while significantly reducing the antenna size and simplifying the overall structure.
Solution Approach 2:
The patent uses parameter changes by adjusting the capacitance values and their positions along the conduction band to achieve different resonance frequencies. By varying these electrical parameters, the antenna can resonate at multiple frequencies without requiring complex multi-branch structures, thus solving the size problem while maintaining dual-frequency functionality.
2Reliability
If multi-branch wire structures are used to achieve dual-frequency resonance, then dual-frequency resonance is achieved, but the resonance frequency band becomes difficult to adjust
Solution Approach 1:
The patent enables easy adjustment of resonance frequency bands by changing the capacitance values and positions of the capacitors along the single conduction band. This parameter-based tuning approach provides flexibility and adaptability, allowing the antenna to be adjusted for different frequency requirements without redesigning the entire multi-branch structure.
3Reliability
If multi-branch wire structures are used to achieve dual-frequency resonance, then dual-frequency resonance is achieved, but the wiring occupies larger space on PCB
Solution Approach 1:
The patent merges multiple wiring paths into a single conduction band structure, significantly reducing the PCB space required. By placing capacitors at strategic positions along this single band, the antenna achieves dual-frequency resonance functionality without the extensive wiring and large footprint associated with traditional multi-branch designs.
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 achieves dual-frequency resonance with a simpler structure, reducing size and facilitating easy adjustment of resonant frequencies, resulting in improved performance and efficiency across frequency bands.
Implementation Method 1
The capacitor is connected between an excitation end and a terminal end of the single-path metal conduction band... achieving dual-frequency resonance
Implementation Method 2
a single-path metal conduction band which is arranged within the clearance area and a terminal end of which is electrically connected to a ground end of the PCB
Data Source
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AI summary
The present application discloses a dual-frequency antenna, comprising: a PCB provided with a clearance area and a non-clearance area; a single-path metal conduction band which is arranged within the clearance area and a terminal end of which is electrically connected to a ground end of the PCB; and a capacitor connected between an excitation end and the terminal end of the single-path metal conduction band. The dual-frequency antenna can achieve dual-frequency resonance merely by means of a metal conduction band on which the capacitors are connected in series, thus avoiding the problems in the prior art that the space occupied by a multi-branch multi-path structure is large, its size is relatively large, and its resonant frequency band is difficult to adjust.