Antenna System Short Cable Routing Bridging Effect
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Solution Overview
Problem
Current antennas with larger cable lengths have a larger footprint, which is undesirable, yet achieving smaller form factors while maintaining performance and bandwidth is a challenge, especially for frequencies ranging from 600 MHz to 6 GHz.
Innovation Solution
An antenna system with a short cable and specific short cable routing that creates a bridging effect between the antenna element and ground plane, reducing the form factor while maintaining lower frequency resonance and efficiency across the desired bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long cable is used to connect the antenna element and ground plane, then antenna performance and bandwidth are improved, but the antenna footprint increases
Solution Approach 1:
The cable is routed in three-dimensional space above the clearance zone rather than in a planar configuration, allowing the cable to achieve the necessary electrical length while minimizing the horizontal footprint of the antenna system
Solution Approach 2:
The cable incorporates bends and curves in its routing path, transforming a straight-line connection into a curved path that utilizes vertical and lateral space efficiently, achieving the required cable length within a compact footprint
2Area of stationary object
If the antenna footprint is reduced to achieve a smaller form factor, then device size is decreased, but antenna performance and bandwidth may be compromised
Solution Approach 1:
By routing the cable vertically above the clearance zone rather than horizontally, the design achieves the required electrical cable length for proper antenna resonance while maintaining a compact horizontal footprint of only 20×40 mm
Solution Approach 2:
The cable routing parameters (length, bend radius, height above clearance zone) are optimized to achieve the desired resonant frequency and bandwidth performance within the constrained footprint, demonstrating that performance parameters can be tuned independently of physical size
3Area of stationary object
If a short cable with bends is used to reduce footprint, then antenna size is decreased, but cable routing complexity increases
Solution Approach 1:
The cable routing employs smooth bends and curves rather than sharp angles or complex multi-segment paths, achieving the required cable length and electrical performance while maintaining manufacturing simplicity and ease of assembly
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 antenna system achieves a smaller size of 20×40 mm with efficient operation from 600 MHz to 6 GHz, averaging -5 dB return loss and 50% efficiency, with peak efficiency of 70%, and can be adapted for various communication standards.
Implementation Method 1
The short cable creates a bridging effect which reduces form factor while retaining lower frequency resonance
Data Source
AI summary
The disclosure concerns an antenna system having a clearance zone coupled to an antenna element, the clearance zone being further coupled to a ground plane. The antenna element and ground plane are electrically coupled by a short cable having a short cable routing. The short cable routing includes at least one bend wherein a portion of the short cable is disposed above the clearance zone. The short cable creates a bridging effect which reduces form factor while retaining lower frequency resonance.