TPMS Antenna Structure Using Valve Stem Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing TPMS transmitter antennas are limited by their short design, leading to weak signal strength, interference with other components, and high power consumption, which affects driving safety and battery life.
Innovation Solution
A spiral coil within the TPMS transmitter is electrically connected to the valve's conductive body to increase antenna length and enhance radiation efficiency, using a screwing method to form the antenna structure, which includes a printed circuit board, support tube, and valve components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the antenna is designed in short shape to avoid excessive length, then the antenna structure is compact and easier to manufacture, but the signal intensity is weak and power consumption increases
Solution Approach 1:
The antenna is divided into two segments: a printed circuit board antenna portion and a valve stem extension portion. The PCB contains a trace pattern that forms part of the antenna, while the valve stem's conductive body extends the antenna structure outward. This segmentation allows the antenna to achieve effective length without requiring a single long structure, thereby reducing power consumption while maintaining compact manufacturing.
Solution Approach 2:
The valve stem serves dual functions: it acts as both the mechanical valve component and an extension of the antenna structure. By making the valve stem conductive and integrating it into the antenna system, the same component performs both its original valve function and extends the electromagnetic radiation element, eliminating the need for separate antenna structures and reducing overall power requirements.
2Length of moving object
If the antenna is designed in short shape, then the antenna structure is compact, but the signal intensity is weak causing receiver errors
Solution Approach 1:
The antenna structure extends into the spatial dimension by utilizing the valve stem's outward projection from the tire. Instead of confining the antenna to the flat PCB surface, the conductive valve stem extends the antenna in the radial direction outward from the tire, effectively increasing the antenna's electromagnetic radiation length without increasing the footprint area on the PCB, thereby improving signal intensity while maintaining compactness.
3Ease of manufacture
If a loop antenna is printed on the circuit board, then the antenna structure is integrated, but the required area becomes too big
Solution Approach 1:
The antenna function is extracted from being confined solely to the PCB surface and is extended outward through the valve stem. The conductive valve stem serves as an extension of the antenna trace pattern on the PCB, allowing the antenna structure to continue in three-dimensional space rather than being restricted to the two-dimensional PCB area, thereby reducing the required board area while maintaining manufacturing integration.
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
This configuration achieves improved radiation efficiency and reduced power consumption, extending battery life while maintaining a compact design.
Implementation Method 1
a spiral coil within the TPMS transmitter can be electrically connected to a conduct body of the valve to get a specific resonance frequency
Data Source
AI summary
An antenna structure for a TPMS (Tire pressure Monitoring System) transmitter is disclosed herein. A TPMS transmitter couples with a valve so that a spiral coil within the TPMS transmitter can be electrically connected to a conduct body of the valve to get a specific resonance frequency. Hence, the length of the antenna structure can be increased effectively and the efficacy can be raised.