Single-Path Antenna Transmission for RF Signal and DC Power
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Solution Overview
Problem
The existing transmission systems for RFID applications require multiple wires, including power supply and transmission lines, leading to increased size and cost due to the need for separate paths for signal transmission and power supply.
Innovation Solution
A transmission system that integrates signal transmission and power supply using a single transmission path, incorporating a radio wave controller, direct current power supply, and switches to manage signal and power distribution efficiently, allowing for reduced size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wires are used for power supply and signal transmission separately, then reliability of power delivery is improved, but system size and cost increase
Solution Approach 1:
The patent combines power supply and signal transmission functions into a single transmission path. The control device transmits both RF signals and DC power through the same antenna and transmission line, eliminating the need for separate power supply wires and reducing system complexity while maintaining functional reliability
Solution Approach 2:
The transmission path is designed to serve multiple functions simultaneously - it acts as both a signal transmission medium and a power delivery channel. The antenna functions dually as both an RF signal radiator and a power reception element, enabling the system to operate with fewer components
2Reliability
If multiple wires are used for power supply and signal transmission separately, then signal transmission quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges power supply and signal transmission into a single transmission path, reducing the total number of components that need to be manufactured and assembled. This integration lowers manufacturing costs while the control device maintains signal transmission quality through proper RF signal modulation and power level control
Solution Approach 2:
The transmission path is designed to perform multiple functions - signal transmission and power delivery - simultaneously. This multi-functionality reduces the bill of materials and assembly complexity, directly lowering manufacturing costs while maintaining signal integrity through careful design of the RF-to-DC conversion process
Data Source
AI summary
A transmission system includes: an antenna; a control device including an RF circuit which transmits a first signal for controlling a radio wave to be outputted from the antenna and an external power supply which supplies direct current to the antenna; and a first transmission path which connects the antenna and the control device, and is used in transmission of the first signal and supplying of the direct current to the antenna.