Near Field RF Communicator Digital Modulation
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Solution Overview
Problem
Existing near field RF communicators require complex modulation and driver circuitry to produce modulated RF signals for communication, which can be cumbersome and inefficient.
Innovation Solution
A near field RF communicator comprising a signal selector and antenna circuitry that uses digital sequences to generate modulated RF signals, allowing for flexible modulation by selecting from a plurality of digital sequences to produce corresponding RF signals, thereby simplifying the modulation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex modulation and driver circuitry is used to produce modulated RF signals, then communication capability is achieved, but device complexity and component cost increase
Solution Approach 1:
The patent replaces traditional analog modulation circuitry with a digital signal processing approach. A digital signal processor generates modulation sequences digitally and converts them to analog RF signals, eliminating the need for complex analog modulation components such as mixers, modulators, and driver circuitry. This substitution of digital for analog mechanisms directly reduces device complexity while maintaining modulation capability.
Solution Approach 2:
The patent changes the fundamental parameter of signal generation from analog continuous adjustment to digital discrete sequencing. By using digitally stored modulation sequences that are converted to analog waveforms, the system achieves modulation through parameter changes in the digital domain rather than through complex analog circuit adjustments, thereby simplifying the overall circuit architecture.
2Reliability
If traditional modulation circuitry is used, then RF signal modulation is achieved, but component cost and manufacturing complexity increase
Solution Approach 1:
The patent replaces complex analog modulation hardware with a digital signal processing system. A digital signal processor generates modulation sequences from stored digital patterns, converts them to analog waveforms through a digital-to-analog converter, and feeds them to the RF transmitter. This substitution simplifies manufacturing by using standard digital components rather than requiring precise assembly of multiple analog modulation components.
Solution Approach 2:
The digital signal processor serves multiple functions: it stores modulation sequences, generates modulation patterns, converts digital to analog signals, and controls the RF transmission. This multi-functional approach consolidates what would traditionally require separate dedicated components for each function, thereby simplifying manufacturing and reducing component count while maintaining reliable signal modulation.
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 approach reduces the complexity of modulation circuitry and enhances the flexibility and efficiency of RF signal generation, enabling effective communication with reduced component complexity and cost.
Implementation Method 1
an antenna operable to generate an RF signal to enable inductive coupling via the magnetic field of the RF signal between the antenna and another near field RF communicator
Implementation Method 2
the magnetic field (H field) of the RF signal to be inductively coupled between the communicators
Data Source
AI summary
A near field RF communicator has: an antenna operable to generate an RF signal to enable inductive coupling via the magnetic field of the RF signal between the antenna and another near field RF communicator or RF transponder in near field range; and a signal generator operable to generate a multi-level digital sine wave drive signal to drive the antenna to generate the RF signal, wherein the signal generator comprises a selector operable to select one or more digital sequences to provide one or more digital signals from which the digital sine wave drive signal is generated.