US 11,811,457 B2
System and method for generating millimeter wave noise with flat radio frequency spectrum
Yuncai Wang, Guangdong (CN); Yimin Huang, Guangdong (CN); Yuehui Sun, Guangdong (CN); Wenjie Liu, Guangdong (CN); Zhensen Gao, Guangdong (CN); and Yu Cheng, Guangdong (CN)
Assigned to GUANGDONG UNIVERSITY OF TECHNOLOGY, Guangdong (CN)
Appl. No. 18/022,976
Filed by GUANGDONG UNIVERSITY OF TECHNOLOGY, Guangdong (CN)
PCT Filed Jul. 21, 2021, PCT No. PCT/CN2021/107723
§ 371(c)(1), (2) Date Feb. 23, 2023,
PCT Pub. No. WO2022/267142, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 202110708015.3 (CN), filed on Jun. 24, 2021.
Prior Publication US 2023/0261753 A1, Aug. 17, 2023
Int. Cl. H04B 10/508 (2013.01); H04B 10/69 (2013.01)
CPC H04B 10/508 (2013.01) [H04B 10/697 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for generating millimeter wave noise with a flat radio frequency spectrum, applied to a system for generating millimeter wave noise with the flat radio frequency spectrum,
wherein the system for generating millimeter wave noise with the flat radio frequency spectrum comprises a first optical emission module, a second optical emission module, an optical coupler and a photodetector, wherein noise optical signals outputted by the first optical emission module and the second optical emission module are transmitted to an input end of the optical coupler, the optical coupler couples the noise optical signals and outputs the noise optical signals to an input end of the photodetector, and beat frequency is performed by the photodetector to realize mapping transformation from optical spectrum to the radio frequency spectrum, to output the flat millimeter wave noise,
wherein the method for generating millimeter wave noise with the flat radio frequency spectrum comprising following steps:
S1: outputting, by the first optical emission module, the noise optical signal with an optical spectrum in Gaussian shape, and transmitting the noise optical signal to an optical coupler;
S2: outputting, by the second optical emission module, the n beams of noise optical signals with the optical spectra in Gaussian shape, and transmitting the noise optical signals to the optical coupler;
S3: coupling noise light generated by the first optical emission module and the second optical emission module to the optical coupler, and transmitting the coupled optical signals to the photodetector; and
S4: performing beat frequency, by the photodetector, to realize mapping transformation from the optical spectra to the radio frequency spectra, and outputting the flat millimeter wave noise,
wherein in the step S2, when the second optical emission module outputs two beams of noise light, the central wavelengths of the two beams of light are respectively λ1 and λ2 and the linewidths of the two beams of light are B, and the flat millimeter wave noise covering a to b GHz is generated, wherein a and b are respectively equal to c/(λ1-λ0) and c/(λ2-λ0), c is the velocity of light, and flatness m of the generated millimeter wave noise satisfies following equation:

OG Complex Work Unit Math