Antenna-Coupler Layout for Passive RF Transfer Across Sealed Housings
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Solution Overview
Problem
Existing radio devices face issues with radio frequency and mechanical switches, which are costly, bulky, power-consuming, and unreliable, leading to signal attenuation and noise, especially in battery-powered devices and smart water meters requiring watertightness.
Innovation Solution
A communicating device with a substrate-based antenna and coupler design, where the antenna has a metallic pattern with a non-metallic area and a complementary metallic area in the coupler, allowing for passive signal transfer without direct contact, enabling electrical isolation and eliminating the need for additional connecting elements or switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a radio frequency switch is used to switch between internal and external antennas, then antenna switching capability is achieved, but device complexity increases, power consumption increases, and signal attenuation occurs
Solution Approach 1:
The patent extracts the switching function from a complex active RF switch and implements it through a simple mechanical connector that physically removes or connects the external antenna. This eliminates the need for complex detection mechanisms and electronic switching circuits, reducing device complexity while maintaining antenna switching capability.
Solution Approach 2:
The mechanical connector design allows the system to self-detect external antenna connection status through the physical presence or absence of the connector itself. The connector's mechanical state directly indicates connection status, eliminating the need for separate detection systems and reducing both complexity and power consumption.
2Adaptability or versatility
If a mechanical switch is used to switch between internal and external antennas, then antenna switching capability is achieved, but device size increases and manufacturing difficulty increases
Solution Approach 1:
The patent extracts the switching function from a complex mechanical switch and implements it through a simple connector that can be directly mounted on the printed circuit board. This simplified connector design is much easier to manufacture and integrate into PCB assemblies compared to traditional mechanical switches, while maintaining the antenna switching capability.
3Adaptability or versatility
If a radio frequency switch is used for antenna switching, then antenna switching capability is achieved, but signal quality deteriorates due to attenuation and noise
Solution Approach 1:
The patent replaces the electronic RF switch with a mechanical connector system that establishes direct physical connections. This eliminates the non-linear elements and active components in the signal path that cause attenuation and noise, improving signal quality while maintaining switching capability through purely mechanical connection and disconnection.
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 solution allows for efficient radio signal transfer between internal and external antennas without adding attenuation or noise, maintaining watertightness and reducing power consumption, with reliable operation in LTE 20 and 8 bands.
Implementation Method 1
the antenna being suitable for operating alone to radiate a radio signal or in association with a coupler disposed facing and distant from the antenna in such a way as to pick up the signal radiated by the antenna
Data Source
AI summary
The invention relates to an antenna of a communicating device, includinga substrate,a feed point of the antenna and a first grounding point intended to be connected to a ground plane;a metallic antenna element pattern printed on one side of the substrate, the antenna element pattern forming an open loop from the feed point to the first grounding point, the loop defining in its center a non-metallic area;the antenna being suitable for operating alone to radiate a radio signal or in association with a coupler disposed facing and distant from the antenna in such a way as to pick up the signal radiated by the antenna, the coupler including a metallic area complementary to the non-metallic area facing it.