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A Tunable Microwave Photonic Notch Filter for UWB Signals

An ultra-wideband signal and notch filter technology, applied in the field of microwave photonics, can solve the problems of poor reconfiguration and tuning capabilities of electrical filters

Inactive Publication Date: 2019-01-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the notch filter used for UWB signals is mainly an electrical filter, usually using the multimode resonator method, coplanar waveguide method, optimized stub method, and low-pass high-pass filter combination method, etc., but the electrical filter A common problem is poor refactoring and tuning capabilities

Method used

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  • A Tunable Microwave Photonic Notch Filter for UWB Signals
  • A Tunable Microwave Photonic Notch Filter for UWB Signals
  • A Tunable Microwave Photonic Notch Filter for UWB Signals

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Embodiment 1

[0022] The laser is the TSL-510 tunable laser of Santec Company, and the wavelength of the laser is set to 1550nm (the corresponding frequency is f c =193.414THz); the first phase modulator is the MPZ-LN-40 of Photline Company, and its bandwidth is 32GHz; the vector network analyzer is the 8722ES vector network analyzer of Agilent, and the frequency range is 40M-20GHz; the photoelectric detector of Tektronix device with a bandwidth of 20GHz; the highly nonlinear optical fiber of YOFC Co., Ltd., the Brillouin gain linewidth of the highly nonlinear optical fiber is Γ B = 30MHz, Brillouin frequency shift f B=10GHz, the length of the optical fiber is 1000 meters, and the peak value of gain and loss is 5; the first intensity modulator and the second intensity modulator are MXAN-LN-20 of Photline Company, and the bandwidth is 20GHz; the first microwave signal source and the second microwave The signal source is microwave signal generator E8257D of Agilent Company, the output freque...

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Abstract

Disclosed is a tunable microwave-photonic sunken-wave wave-filter for UWB signal. The wave-filter is based on stimulated Brillouin scattering effect, phase modulation,and optical wave-filtering, and relates to the field of microwave photonics technology. The wave-filter comprises a first-laser, a first-optical- coupling, a phase modulator, a first-tunable-optical-filter, high nonlinear fibers, a first-microwave-signal-source, a first-intensity-modulator, a second-tunable-optical-wave-filter, a second-microwave-signal-source, a second-intensity-modulator, a third-tunable-optical-wave-filter, a second-optical-coupling, an optical circular apparatus , a photoelectric detector and a vector network analyzer. The technology of the tunable microwave-photonic sunken-wave wave-filter for UWB signal combines stimulated Brillouin scattering effect, phase modulation and optical wave-filtering. By changing the number of pumping ray signal, the wave-filter can change the number of sunken-wave. By adjusting the pumping ray frequency, the wave-filter can tune the center frequency of the sunken-wave.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and in particular relates to a tunable microwave photon notch filter for ultra-wideband (UWB) signals based on stimulated Brillouin scattering effect, phase modulation and optical filtering. Background technique [0002] In 2002, the Federal Communications Commission of the United States approved the application of Ultra Wide Band (UWB) technology in the field of short-range wireless communication, and opened the frequency band from 3.1 GHz to 10.6 GHz for commercial use. Due to the advantages of strong multipath resolution, high transmission rate, low power consumption, flexibility and maneuverability, ultra-wideband signals have received a lot of attention in sensor networks, short-distance high-speed wireless communication and radar systems. In the standard definition of ultra-wideband signals, their power spectral density is low, so the communication distance is limited, generally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01H01S1/02
Inventor 董玮张琪张歆东温善鹏周敬然郭文滨沈亮阮圣平刘彩霞
Owner JILIN UNIV