Wireless Transmission System Using Injection Locking
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Solution Overview
Problem
Current wireless transmission systems face challenges in high-speed signal transmission due to increased power consumption, signal distortion, and electromagnetic interference, particularly in the low voltage differential signaling (LVDS) technique, which limits performance for high-speed applications like video signals. Additionally, existing wireless solutions using ultra-wide band (UWB) or millimeter wave frequencies face issues with antenna size, interference, and the complexity of oscillator circuits required for high frequency stability.
Innovation Solution
A wireless transmission system that relaxes the stability of the carrier frequency, using a mechanism where the reception side generates a demodulation carrier signal locked with the modulation carrier signal, allowing proper signal demodulation even with reduced frequency stability. This system employs a simple oscillator circuit configuration and uses injection locking for frequency synchronization, enabling efficient high-speed signal transmission between electronic apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If LVDS technique is used for high-speed signal transmission, then transmission speed is improved, but power consumption increases and signal distortion occurs
Solution Approach 1:
The patent replaces electrical line-based signal transmission (LVDS) with wireless transmission using electromagnetic waves. This substitution eliminates the need for physical electrical connections, thereby reducing power consumption associated with maintaining electrical pathways and reducing signal distortion caused by electrical line reflections and interference.
2Speed
If LVDS technique is used for high-speed signal transmission, then transmission speed is improved, but signal distortion due to reflection increases
Solution Approach 1:
The patent replaces electrical line-based signal transmission with wireless transmission using electromagnetic waves. This substitution eliminates signal distortion caused by electrical line reflections and interference, as wireless transmission does not rely on physical conductors that can cause reflection and electromagnetic interference.
3Speed
If number of lines is increased to parallelize signal transmission, then transmission speed is improved, but device complexity increases
Solution Approach 1:
The patent replaces multi-line parallel electrical transmission with wireless electromagnetic wave transmission. This substitution consolidates multiple signal pathways into a single wireless communication channel, thereby reducing the number of input/output terminals, simplifying printed board and cable line configurations, and reducing overall device complexity.
4Volume of moving object
If UWB communication system is used for wireless transmission, then antenna size is reduced, but frequency stability becomes insufficient for high-speed communication
Solution Approach 1:
The patent changes the carrier frequency parameter from UWB frequencies to millimeter wave frequencies (30 GHz to 300 GHz). This parameter change enables high-speed communication while maintaining relatively small antenna sizes, as millimeter wave antennas can be compact while providing sufficient frequency stability for high-rate data transmission.
5Stability of the object's composition
If millimeter wave band is used for wireless transmission, then frequency stability is improved, but antenna size increases
Solution Approach 1:
The patent optimizes the millimeter wave frequency parameters and antenna design to achieve high-speed communication with acceptable antenna sizes. By carefully selecting frequencies within the 30-300 GHz range and optimizing antenna configurations, the system achieves sufficient frequency stability while keeping antenna dimensions practical for integration into electronic apparatus.
6Volume of moving object
If carrier frequency is lowered for wireless transmission, then antenna size is reduced, but susceptibility to driving system noise increases
Solution Approach 1:
The patent selects millimeter wave frequencies (30 GHz to 300 GHz) as an optimal parameter range that balances antenna size and noise susceptibility. These frequencies are high enough to provide good noise immunity compared to lower frequencies, while still allowing for compact antenna designs. The millimeter wave band provides sufficient frequency separation from baseband signal processing frequencies, reducing interference.
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
The system achieves reliable high-speed signal transmission with reduced complexity and power consumption, allowing for a simplified circuit configuration and the integration of oscillator circuits on a single semiconductor substrate, while minimizing interference and antenna size issues.
Implementation Method 1
a mechanism is provided where a reception side generates a demodulation carrier signal locked with a modulation carrier signal
Data Source
AI summary
A wireless transmission system includes: a communication unit for transmission; and a communication unit for reception. The communication units for transmission and reception are housed in a housing of the same electronic apparatus, or the communication unit for transmission is housed in a housing of first electronic apparatus and the communication unit for reception is housed in a housing of second electronic apparatus and a wireless signal transmission path enabling wireless information transmission between the communication units is formed between the communication units when the first and the second electronic apparatus are disposed at given positions to be integrated with each other. The communication unit for transmission includes a first carrier signal generating unit and a first frequency converter, and the communication unit for reception includes a second carrier signal generating unit, and a second frequency converter.