Compact Helical Antenna With Plastic Support For Low Frequency RF
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Solution Overview
Problem
Existing helical antennas for low-frequency wireless communication in water meters are sensitive to dimensional changes, leading to variations in RF performance and challenges in automated manufacturing.
Innovation Solution
A compact helical antenna design with a limited number of turns raised from a printed circuit board, combined with an antenna support made of plastic to maintain dimensional consistency and achieve target performance parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If helical antennas are used to compress the antenna's height for low-frequency wireless communication, then the antenna can fit in the restricted space of the pit, but the antenna becomes sensitive to dimensional changes particularly in pitch
Solution Approach 1:
The patent limits the number of turns in the helical antenna to a specific range (1-5 turns) to control the pitch dimension. This parameter change reduces sensitivity to manufacturing variations while maintaining the compact height required for pit installation.
Solution Approach 2:
Instead of using a full helical structure with many turns, the patent employs a partial helical structure with limited turns (1-5). This partial action achieves the necessary height compression while significantly reducing the cumulative effect of pitch variations on overall antenna performance.
2Reliability
If the number of turns in the helical antenna is increased to improve gain and bandwidth, then the antenna performance is enhanced, but the antenna dimensions increase making it unsuitable for compact spaces
Solution Approach 1:
The patent optimizes the number of turns parameter to a specific range (1-5 turns) that achieves the necessary gain and bandwidth for low-frequency communication while maintaining compact dimensions suitable for water meter pits.
Solution Approach 2:
The patent uses a partial helical structure with limited turns instead of a complete multi-turn helix. This partial implementation provides sufficient RF performance for water meter applications without the excessive dimensions that would result from traditional helical designs.
Data Source
AI summary
An antenna apparatus and method of operating the antenna apparatus, can include a helical antenna comprising a helical portion raised from a printed circuit board to optimize gain and bandwidth, wherein the helical portion incorporates a limited number of turns, which facilitate control over the dimensions of the helical antenna. An antenna support can be provided, which can maintain dimensional consistency with respect to the helical antenna. The antenna support can facilitate achievement of target performance parameters for the antenna apparatus. In addition, the elevated helical portion can be configured to enhance the gain and the bandwidth without compromising the overall dimensions of the helical antenna. In some embodiments, the helical antenna may be formed from plastic.