Electromagnetic Wave Modulation Using Multi-Region Voltage Switching
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Solution Overview
Problem
Existing electromagnetic wave transmission techniques using amplitude-shift keying modulation methods, such as those employing resonant tunneling diodes, are limited in transmission speed due to their reliance on amplitude differences to indicate data values.
Innovation Solution
An electromagnetic wave transmission device utilizing a transmission unit with local maximum and minimum voltage values to modulate signals across multiple voltage regions, allowing for the selection of signals with the smallest total transition potential difference, thereby enhancing transmission speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If amplitude-shift keying modulation method is used to indicate two values by amplitude difference, then the modulation is simple to implement, but the transmission speed is limited
Solution Approach 1:
The patent changes the modulation parameter from amplitude difference to frequency difference. By using frequency-shift keying (FSK) where '0' and '1' are represented by different frequencies (first frequency and second frequency respectively), the system achieves faster transmission speed while maintaining implementation simplicity through the use of a frequency modulation unit.
2Ease of operation
If conventional voltage modulation is used in oscillation region, then the signal generation is straightforward, but the transmission speed cannot be accelerated
Solution Approach 1:
The patent changes the operating parameter from voltage modulation in oscillation region to frequency modulation using non-oscillation regions. By applying voltages that correspond to first and second frequencies (which are non-oscillation regions of the resonant tunneling diode), the system achieves faster signal transitions and higher transmission speed while keeping the modulation operation simple through automated frequency selection.
3Reliability
If only oscillation region is used for voltage modulation, then the system operates in a stable region, but the transmission speed is constrained
Solution Approach 1:
The patent segments the voltage modulation process into two distinct parts: using first non-oscillation regions for transmitting '0' signals and second non-oscillation regions for transmitting '1' signals. This segmentation allows the system to operate in stable non-oscillation regions while achieving fast transmission speeds, as each segment corresponds to a specific frequency state that can be rapidly switched between.
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 accelerates transmission speed and communication speed by effectively utilizing multiple voltage levels in the device's voltage-current characteristics, improving signal recognition and stability in the communication system.
Implementation Method 1
a transmission unit that has, in voltage-current characteristics, a local maximum value and a local minimum value located on a higher voltage side than the local maximum value and transmits an electromagnetic wave indicating a modulation signal
Data Source
AI summary
An electromagnetic wave transmission device according to the present invention includes: a transmission unit that has, in voltage-current characteristics, a local maximum value and a local minimum value located on a higher voltage side than the local maximum value and transmits an electromagnetic wave indicating a modulation signal; and a modulation unit which modulates an acquired digital signal to the modulation signal using first voltage values of two or more levels in a first voltage region, which is equal to or greater than a voltage of the local maximum value and is equal to or less than a voltage of the local minimum value, and a second voltage value in a second voltage region, which is less than the voltage of the local maximum value, and a third voltage value in a third voltage region, which is on a higher voltage side than the voltage of the local minimum value. A first signal which transits to any one voltage value of the first voltage values from any voltage value in the first voltage region via the second voltage value and a second signal which transits to the any one voltage value from the any voltage value via the third voltage value are the same signals. The modulation unit selects, out of the first signal and the second signal, the signal having a smaller total transition potential difference.