Phase-Controlled Carrier Transmission for Long-Range Non-Diffractive Beams
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Solution Overview
Problem
Existing beamforming technologies face limitations in long-range transmission due to diffraction, leading to low signal-to-noise ratio and efficiency, while non-diffractive beams like Bessel beams have short effective distances and degrade to Gaussian beams, further reducing transmission efficiency.
Innovation Solution
A signal transmitting method and apparatus that utilize a plurality of phase modulation units and transmitting units to modulate carrier signals based on their frequencies and locations, forming a non-diffractive beam through precise phase control, including formulas to determine the phase of each carrier signal to maintain non-diffraction properties over long distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beamforming technology is used to overcome diffraction, then transmission directionality is improved, but transmission distance is limited due to phase mismatch requirements and minimum divergence angle
Solution Approach 1:
The patent changes the fundamental parameters of the electromagnetic wave by using a superposition of multiple Bessel beams with different orders and weights, creating a new wave pattern that maintains non-diffractive properties over extended distances while improving signal-to-noise ratio through constructive interference at the target location
Solution Approach 2:
The patent creates a composite electromagnetic wave structure by superimposing multiple Bessel beams of different orders (l=0, ±1, ±2, ...) with specific weight coefficients, forming a composite wave pattern that combines the non-diffractive properties of individual Bessel beams while achieving improved transmission performance
2Reliability
If non-diffractive beam (Bessel beam) is used to achieve focusing capability beyond diffraction limit, then transmission efficiency is improved, but effective distance is limited
Solution Approach 1:
The patent extends the effective distance by introducing temporal dimension through chirp modulation, creating a spatiotemporal coupling effect where the wave packet maintains its shape through coordinated variations in both space (radial coordinate) and time (frequency modulation), effectively breaking the distance limitation of conventional Bessel beams
3Speed
If conventional beamforming is used for long-range transmission, then transmission distance is extended, but signal-to-noise ratio deteriorates due to diffraction and spreading
Solution Approach 1:
The patent fundamentally changes the wave propagation parameters by using a continuous spectrum of Bessel beam orders with specific weight distributions, creating a wave pattern that resists diffraction and spreading over long distances, thereby maintaining high signal-to-noise ratio while achieving extended transmission distance
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
Improves signal-to-noise ratio and transmission efficiency by forming a non-diffractive beam that maintains its properties over long ranges, enhancing communication systems.
Implementation Method 1
Each of the plurality of phase modulation units modulates a phase of each carrier signal in a set of carrier signals, the set of carrier signals includes a plurality of carrier signals, frequencies of the plurality of carrier signals are different
Implementation Method 2
During propagation of an electromagnetic wave, a transverse wave vector component (a transverse direction is vertical to a transmitting direction) exists. As a result, a beam spreads over a propagation distance, causing diffraction.
Implementation Method 3
a superimposed signal of the carrier signals transmitted by the plurality of transmitting units may form a non-diffractive beam
Implementation Method 4
The non-diffractive beam has a property of non-divergence, and has a focusing capability beyond the diffraction limit
Data Source
AI summary
This application provides a signal transmitting method and a transmitting apparatus. The method is applied to a transmitting apparatus. The transmitting apparatus includes a plurality of transmitting units and a plurality of phase modulation units, the plurality of phase modulation units include a first phase modulation unit, and the plurality of transmitting units include a first transmitting unit. The method includes: Each phase modulation unit modulates a phase of each carrier signal in a set of carrier signals, where the set of carrier signals includes a plurality of carrier signals, frequencies of the plurality of carrier signals are different, the set of carrier signals includes a first carrier signal, and a phase of a modulated first carrier signal is determined based on a frequency of the first carrier signal and a location of the first transmitting unit.