Terahertz Wave Multi-Level Modulation for Faster Data Transmission
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Solution Overview
Problem
Existing electromagnetic wave transmission techniques, such as those using resonant tunneling diodes and terahertz waves, are limited in increasing transmission speed due to their reliance on amplitude-based modulation methods.
Innovation Solution
An electromagnetic wave transmission apparatus with a transmission unit that utilizes voltage-current characteristics with local maximum and minimum values to transmit modulation signals with three or more voltage levels within an oscillation region, enabling multi-value modulation of terahertz waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If amplitude-based modulation methods (ASK or OOK) are used to represent binary values, then the modulation is simple to implement, but the transmission speed cannot be increased further
Solution Approach 1:
The patent changes the modulation parameter from binary amplitude levels (0 or 1) to multi-level voltage values (three levels or more) within the oscillation region. This allows representing multiple data values in a single signal state, thereby increasing transmission speed without fundamentally changing the modulation approach
Solution Approach 2:
The patent transitions from one-dimensional binary modulation (two amplitude levels) to multi-dimensional modulation by utilizing multiple voltage levels within the oscillation region. This dimensional expansion enables more data to be transmitted per signal unit, resolving the transmission speed limitation
2Productivity
If multi-value modulation with three or more voltage levels is implemented in the oscillation region, then transmission speed increases significantly, but the voltage control precision requirement increases
Solution Approach 1:
The patent utilizes the inherent oscillation characteristics of the transmission unit to automatically establish stable voltage levels. The oscillation region's natural properties provide self-stabilizing voltage states, reducing the need for external precision control mechanisms while maintaining multi-level voltage stability
3Adaptability or versatility
If the voltage-current characteristics with local maximum and minimum values are utilized, then multi-value modulation becomes possible, but the device structure becomes more complex
Solution Approach 1:
The patent designs the transmission unit to serve multiple functions: it generates electromagnetic waves for transmission, provides oscillation for signal stabilization, and creates the voltage-current characteristics necessary for multi-value modulation. This multi-functionality reduces the need for separate components, managing structural complexity while enhancing modulation capability
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 significantly increases transmission speed by allowing for the transmission of more data in the same time frame, enhancing communication speed and stability by using voltage levels within the oscillation region for multi-value modulation.
Implementation Method 1
a transmission unit whose voltage-current characteristics have a local maximum value and a local minimum value located on a higher voltage side than the local maximum value and which transmits an electromagnetic wave indicating a modulation signal
Data Source
AI summary
An electromagnetic wave transmission apparatus of the present invention includes a transmission unit whose voltage-current characteristics have a local maximum value and a local minimum value located on a higher voltage side than the local maximum value and which transmits an electromagnetic wave indicating a modulation signal, an acquisition unit which acquires a digital signal, and a modulation unit which modulates the digital signal into the modulation signal which is a signal using voltage values of three levels or more in an oscillation region which is a voltage region that is equal to or more than a voltage of the local maximum voltage and equal to or less than a voltage of the local minimum voltage. The transmission unit preferably transmits a synchronization signal as at least a part of the modulation signal. In this case, the synchronization signal preferably includes a maximum value and a minimum value among the voltage values of three levels or more, and includes a pattern in which the voltage value transitions from one of the maximum value and the minimum value to the other.