Spintronics Wireless Communication System for Multiband Modulation
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Solution Overview
Problem
Current wireless communication technologies face challenges in achieving high-speed, low-power, and compact multi-frequency transmission due to long oscillation-settling times, high power consumption, and complex system designs, which hinder the efficient transmission of gigabits per second data and high-definition video.
Innovation Solution
A spintronic wireless communication system utilizing spin transfer torque devices for simultaneous multi-band frequency and amplitude modulation, with a short oscillation-settling time, featuring a plurality of spin transfer torque devices, matching networks, an antenna, and a demultiplexer to generate and transmit multi-band OOK or multi-level ASK signals, allowing for adjustable frequency and amplitude modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional oscillators are used for multi-frequency transmission, then frequency coverage is achieved, but oscillation-settling time becomes long and transmission speed is limited
Solution Approach 1:
The patent replaces conventional electronic oscillators with spin-torque transfer devices that utilize spin transfer torque effects to generate oscillations. This substitution of the oscillation mechanism enables much faster settling times (sub-nanosecond range) compared to conventional LC oscillators, directly resolving the contradiction between transmission speed and oscillation-settling time.
2Productivity
If multiple high power amplifiers are used for MIMO in 5 GHz band, then transmission capacity is improved, but power consumption increases significantly
Solution Approach 1:
The patent changes the operating parameters by using spin-torque transfer devices that can operate at lower power levels compared to high power amplifiers. The spintronic devices utilize magnetic field effects and spin transfer torque to achieve signal amplification and modulation with significantly reduced power consumption while maintaining transmission capacity through multi-band operation.
3Adaptability or versatility
If conventional oscillators with narrowband characteristics are used, then frequency stability is achieved, but adaptability to wide frequency bands is limited
Solution Approach 1:
The patent implements a universal spin-torque transfer device architecture that can operate across multiple frequency bands (2.4 GHz, 5 GHz, and other bands) by adjusting operating parameters such as current magnitude and magnetic field strength. This multi-functional design maintains frequency stability through controlled oscillation while adapting to wide frequency bands, resolving the contradiction between adaptability and reliability.
4Productivity
If signal processing is performed for multi-carrier transmission, then data transmission rate is improved, but system complexity and power consumption increase
Solution Approach 1:
The patent extracts the modulation and frequency generation functions directly into the spin-torque transfer devices themselves, eliminating the need for separate signal processing circuits for multi-carrier transmission. The spintronic devices inherently generate multi-frequency signals through their oscillation characteristics, simplifying the overall system architecture while maintaining high data transmission rates.
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, reduces power consumption, and miniaturizes the transmitter, enabling efficient high-speed data transmission with multiple frequency bands while minimizing system size and power usage.
Implementation Method 1
a spin torque oscillator configured to receive an input electric current and to produce a radio frequency output signal
Implementation Method 2
a frequency converter including a frequency conversion device capable of accommodating a Si-series MMIC and also a GaAs-series MIMIC by using a magneto-resistance element
Data Source
AI summary
The present invention relates to a spintronic wireless communication system for simultaneously modulating multiband frequencies and amplitudes, the system comprising: a plurality of spin-torque transfer devices which have different frequency characteristics from each other, and OOK modulate or multi-level ASK modulate input data to thereby output a multiband OOK modulation signal or a multiband, multi-level ASK modulation signal; a plurality of matching networks which match individual impedances of the plurality of spin-torque transfer devices; and a broadband antenna which receives the multiband OOK modulation signal or the multiband, multi-level ASK modulation signal from ends of the plurality of matching networks and simultaneously transmits the signals to the outside.