RFID Transmitter Waveform Measurement Without External Test Gear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current NFC communication systems require complex and expensive test equipment to ensure that the RF-Field emitted by transmitters complies with standards and national regulations, hindering the development and implementation of new applications.
Innovation Solution
Incorporating a wave shape measurement stage within the transmitter using equivalent time sampling, which allows the transmitter to measure the shape of the received modulated receiver data signal without the need for external test equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external test equipment is used to measure the RF-Field waveform, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the measurement function with the transmitter by integrating a measurement antenna and waveform analyzer directly into the transmitter device. This eliminates the need for separate external test equipment, resolving the contradiction by merging the measuring device with the object being measured while maintaining measurement capability.
Solution Approach 2:
The transmitter performs self-measurement of its own RF-Field output through the integrated measurement antenna and analyzer. The device serves itself by incorporating the measurement functionality, eliminating dependency on external complex test equipment while maintaining measurement precision.
2Measurement precision
If external test equipment is used to verify compliance with standards, then measurement capability is improved, but ease of operation deteriorates
Solution Approach 1:
By merging the compliance verification function into the transmitter itself through integrated measurement capabilities, the system becomes easier to operate. Users can directly verify compliance without setting up external equipment, resolving the contradiction between measurement capability and operational simplicity.
Solution Approach 2:
The transmitter automatically performs compliance verification of its own output signals. This self-service approach eliminates the need for operators to manage complex external test equipment, significantly improving ease of operation while maintaining verification capability.
3Measurement precision
If comprehensive test equipment is used to check all parameters, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The integrated measurement system allows simultaneous measurement of multiple parameters (overshoot, undershoot, ringing, frequency) within the transmitter itself. This eliminates the need for sequential measurements with external equipment, reducing testing time while maintaining comprehensive parameter verification accuracy.
Solution Approach 2:
The measurement system operates continuously during transmitter operation, allowing real-time monitoring of waveform parameters without interrupting the transmission process. This continuous measurement approach eliminates time loss associated with stopping transmissions for separate measurements.
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 solution simplifies the measurement of wave shapes, reduces the need for costly external test equipment, and enables faster development and implementation of new NFC communication system applications.
Implementation Method 1
an antenna connected to the transmitter stage via a matching circuit to transmit the amplitude modulated transmitter data signal in resonance in the RF-Field over the air
Implementation Method 2
a receiver stage connected via the matching circuit to the antenna to receive the modulated receiver data signal
Data Source
Figure 1A~3B
Figure 4
Figure 5
AI summary
A transmitter (1) of an RFID communication system to transmit an amplitude modulated transmitter data signal (2) in resonance in an RF-Field over the air and to receive a modulated receiver data signal (8), which transmitter (1) comprises: a transmitter stage (3) to generate the amplitude modulated transmitter data signal (2) with a particular frequency and waveform based on a carrier signal (5) generated by a carrier signal stage (10); an antenna (7) connected to the transmitter stage (3) via a matching circuit to transmit the amplitude modulated transmitter data signal (2) in resonance in the RF-Field over the air; a receiver stage (9) connected via the matching circuit to the antenna (7) to receive the modulated receiver data signal (8); wherein the transmitter (1) furthermore comprises a wave shape measurement stage to measure the shape of the received modulated receiver data signal (8) with equivalent time sampling.