Cable Antenna Structure for Multi-Band Frequency Adaptation
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Solution Overview
Problem
Conventional PCB antenna devices are inflexible and require separate manufacturing for each communication product, making it impossible to adapt to different frequency bands without modifying the antenna layout.
Innovation Solution
An antenna device using a signal cable, casing, and grounding component, where the signal cable is fixed to the casing with a grounding component connected to a metal member, allowing for adjustable configurations to support various frequency bands by adjusting the length and shape of the signal and grounding portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If PCB antenna device is manufactured with fixed layout, then manufacturing precision is improved, but adaptability deteriorates
Solution Approach 1:
The antenna device is divided into separate functional modules: a signal cable with signal portion and grounding portion, a grounding component, and a metal member. This segmentation allows the signal cable to be reconfigured for different frequency bands while maintaining precise manufacturing of individual components, resolving the contradiction between fixed layout precision and frequency adaptability.
Solution Approach 2:
The signal cable's signal portion and grounding portion can be dynamically adjusted in length and configuration to match different frequency requirements. The grounding component provides flexible connection options between the signal cable and metal member, enabling the antenna to adapt to various frequency bands without requiring complete redesign of the PCB layout.
2Reliability
If separate PCB antenna devices are manufactured for each communication product, then reliability is improved, but device complexity deteriorates
Solution Approach 1:
The antenna device is designed as a universal solution that can be applied to multiple communication products across different frequency bands. The signal cable with adjustable signal and grounding portions, combined with the flexible grounding component, enables a single antenna design to serve multiple communication standards and frequency requirements, reducing the need for separate PCB antenna devices for each product.
3Adaptability or versatility
If PCB antenna layout is modified for different frequency bands, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
Instead of modifying the PCB layout, the invention changes physical parameters of the signal cable (length of signal portion, length of grounding portion) and grounding component configuration to adapt to different frequency bands. This approach maintains consistent PCB manufacturing processes and precision while achieving frequency adaptability through parameter adjustment of cable and grounding components.
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 adaptation to different frequency bands without the need for modifying the antenna layout, replacing conventional PCB antenna devices with a flexible solution that can support multiple resonance modes and frequency signals.
Implementation Method 1
the signal portion extends along a direction parallel to the second side... the length of the signal portion is equal to a quarter wavelength of a first radio frequency signal
Implementation Method 2
The grounding portion is connected to the metal member through the grounding component... the grounding component includes one of copper foil, aluminum foil, and conductive cloth
Implementation Method 3
the length of the signal portion is equal to a quarter wavelength of a first radio frequency signal... the length of the signal portion is equal to a three-quarter wavelength of a second radio frequency signal
Data Source
AI summary
An antenna device is disposed. The antenna device includes a signal cable, a casing, a grounding component, and a metal member. The signal cable includes a signal portion and a grounding portion. The signal cable is fixed on the casing. The grounding portion is connected to the metal member through the grounding component.