- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Design of a high outband rejection cross-coupled SIW filter for millimeter wave communications
摘要： In this paper, we demonstrate ultra-fast millimeter wave beam steering with settling times below 50 ps. A phased array antenna with two elements is employed to realize beam steering. The phased array feeder is implemented with a recently introduced time delay line that provides, at the same time, an ultra-fast tunability, broadband operation, and continuous tuning. Our implementation is used to perform symbol-by-symbol steering. In our demonstration, the beam direction is switched between two sequentially transmitted symbols toward two receivers placed 30° apart. We show the successful symbol-by-symbol steering for data streams as fast as 10 GBd. The suggested scheme shows that the ultra-fast beam steering is becoming practical and might ultimately enable novel high bit-rate multiple access schemes.
关键词： Ultra-fast beam steering,radio access network,microwave photonics,millimeter wave communication
更新于2025-09-16 10:30:52
-
[IEEE 2019 21st International Conference on Transparent Optical Networks (ICTON) - Angers, France (2019.7.9-2019.7.13)] 2019 21st International Conference on Transparent Optical Networks (ICTON) - Distributed Coherent Radars Enabled by Fiber Networks
摘要： In the last few years, we have been proposing the use of photonics to bring new functionalities in radar systems, exploiting its precision and tunability to give radars improved performance and reconfigurability. This paper will present the most recent evolution of the original idea of photonics-based radars, which considers the exploitation of the increasingly available fiber connections to implement a network of widely distributed radars. The centralized photonic approach allows driving several separated radars simultaneously, enabling the novel class of distributed coherent radar systems. Through the implementation of specific multi-input multi-output (MIMO) processing, the photonics-enabled radar network is capable to push the radar detection resolution far beyond the limits usually set by the signal bandwidth alone.
关键词： MIMO processing,microwave photonics,radar network,fiber network
更新于2025-09-12 10:27:22
-
[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Design of Silicon Integrated Bragg Gratings for Microwave Photonics Signal Processing
摘要： This paper reviews the basic design ?ow of a silicon integrated Bragg grating (IBG) to achieve an arbitrary microwave photonics (MWP) signal processor. An example of using the design methodology to achieve a multichannel MWP Hilbert transformer (HT) based on a silicon IBG is given. Then, we review the adverse impact of apodization phase noise (APN) on the apodized grating response, and our recently demonstrated performance improvement of a grating-based MWP HT realized by compensating for the APN to correct the grating complex response. Finally, we give an outlook and suggestions for the future work.
关键词： microwave photonics signal processing.,Silicon integrated Bragg gratings
更新于2025-09-12 10:27:22
-
[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Microwave Photonic Based 1/n Frequency Divider
摘要： A new microwave photonic frequency divider is presented. It is capable of generating a microwave frequency component with a frequency of 1/n times the input microwave signal frequency. The 1/n frequency divider is implemented based on an optoelectronic oscillator consisting mainly of a dual-parallel Mach Zehnder modulator for microwave signal modulation and an optical filter for sideband suppression. Experimental results are presented which demonstrate 1/2 and 1/3 frequency component generation. The phase noise measurements show that the 1/2 and 1/3 frequency components have improved phase noise performance by 6 and 9 dB, respectively.
关键词： microwave photonics,optoelectronic oscillator,frequency division
更新于2025-09-12 10:27:22
-
[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Photonic Generation of Dual-Chirp Microwave Pulses by Self-Heterodyne Optical Beating
摘要： This paper reports photonic generation of linear dual-chirp microwave pulses in S and L-bands by directly modulating a DFB laser diode with low frequency electronics in a self-heterodyne scheme. The excitation current waveform which results in linear up- and down-chirped pulses in a self-heterodyne setup was calculated using the measured current-frequency transfer function of the DFB-LD. Polarization multiplexing was used to synchronize the up- and down-chirped pulses in a single dual-chirp microwave pulse. The calculated chirp linearity was experimentally verified, and a time-domain analysis was performed showing a slowly varying microwave phase within a pulse.
关键词： microwave-photonics generation,dual-chirp,self-heterodyne,laser diode
更新于2025-09-12 10:27:22
-
[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Highly Flat Optical Frequency Comb Based on the Time Lens Principle
摘要： Broad bandwidth optical frequency combs (OFCs) have received much attention in recent years due to a dramatic growth of their applications, such as spectroscopy measurements, microwave photonics applications, and optical communications. There are several advanced optical superchannel systems, which have been practically implemented by OFCs, such as a Tbit/s coherent optical orthogonal frequency division multiplexing (OFDM) system [1] and Tbit/s single-channel coherent Nyquist pulse transmission systems with high spectral efficiency [2], etc. Those systems require the OFC with a high degree of flatness and broad bandwidth that are difficult to achieve with conventional methods based on sinusoidal phase modulation (SPM).
关键词： microwave photonics,optical frequency combs,Nyquist pulse transmission,OFDM,spectroscopy measurements,optical communications
更新于2025-09-12 10:27:22
-
[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - Microwave-Photonics and WDM-PON Fronthaul for 5G Mobile Systems: Research Activities in Brazil
摘要： Brazilian researchers have been active since the very early days of microwave-photonics, even before this term was coined. The present paper addresses current research, focusing mostly on the activities conducted at the University of Sao Paulo and the National Institute of Telecommunications (Inatel). From a device-level point of view, we demonstrate a variety of photonics-assisted RF devices including frequency converters, amplifiers and RF front-ends. Regarding microwave signal distribution, we demonstrate both a multi-band optical-wireless network delivering 3 Gb/s at 26 GHz as well as a colorless WDM-PON architecture, based on the self-seeding and wavelength-reuse techniques, as an future alternative for 5G radio-over-fiber fronthaul.
关键词： microwave-photonics,microwave signal distribution,5G mobile fronthaul,WDM-PON,photonics-based RF devices
更新于2025-09-11 14:15:04
-
[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Silicon Photonic Microdisk Sensor Based on Microwave Photonic Filtering Technique
摘要： A high-sensitivity and high-resolution silicon photonic sensor based on a microwave photonic filtering technique is proposed and demonstrated. By employing a Mach-Zehnder modulator with a fixed 90° hybrid and a single DC bias control, this simple optical configuration is adopted to first tailor the amplitude of the optical field to achieve a power ratio in the sidebands which is then followed by an over-coupled integrated microdisk resonator (MDR) to provide a power equalization and π rad phase difference in the sidebands. The proposed scheme enables a highly effective cancellation of the beating signals at RF frequencies corresponding to the MDR notch center, resulting in an ultrahigh-rejection notch in the RF domain. A change in the environmental parameters can thus be detected with high sensing resolution by monitoring the frequency shifts of the ultranarrow RF notch. The use of the MDR contributes to a high sensing sensitivity while the fabrication requirements on having an ultrahigh Q factor is removed. A temperature sensor based on the proposed scheme is demonstrated as a proof-of-concept, presenting a temperature sensitivity of 9.91 GHz/°C and a 25 times improvement in the sensing resolution compared to the conventional optical sensing method based on direct measurement of the optical spectrum.
关键词： silicon photonics,Microwave photonics,microdisk,sensors
更新于2025-09-11 14:15:04
-
[IEEE 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fukuoka, Japan (2019.7.7-2019.7.11)] 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Antenna-Coupled Electrode Electro-Optic Modulator and 28 GHz-Band Wireless Signal Transfer over Fiber for 5G Mobile Systems
摘要： Signal conversion from 28 GHz-band wireless to optical signals and transfer over optical fiber were demonstrated successfully using a newly-designed antenna-coupled electrode LiNbO3 electro-optic modulator, which is suitable for uplinks in 5G mobile front-haul.
关键词： antenna,5G mobile systems,optical modulator,LiNbO3,radio-over-fiber,Microwave photonics
更新于2025-09-11 14:15:04
-
[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Highly Linear Graphene Modulator Based on Silicon Waveguide for Integrated Microwave Photonics
摘要： We demonstrated the highly linear graphene modulators based on silicon waveguide employing the electro-absorption and electro-refractive effect of graphene, with the spurious-free dynamic range (SFDR) of 109.55 dB·Hz2/3 and 121.05 dB·Hz2/3 .
关键词： Graphene,Microwave photonics,Silicon modulator,Integrated optics devices
更新于2025-09-11 14:15:04