A layout and connection optimization for static frequency divider is presented. The layout optimization provides a new circle topology transistors placement and reasonable connection structure, which reduces the paras...A layout and connection optimization for static frequency divider is presented. The layout optimization provides a new circle topology transistors placement and reasonable connection structure, which reduces the parasitic effectively and enables self-oscillation frequency enhancement. Besides, bandwidth enhancement techniques based on a center-tap capacitor in input balun design and inductive peaking in latch design are adopted to improve further high frequency performance with low power consumption. As a proof of concept, design of a divide-by-2 static frequency divider in 0.13 μm SiGe BiCMOS technology is reported. With single-ended input clock signal, the divider is measured to be operated from 40 to 90 GHz. Phase noise measurements of a 90 GHz input clock signal indicate ideal behavior with no measurable noise contribution from the divider. The divider followed by a buffer that can deliver more than-10 dBm output power, which is sufficient to drive succeeding stage. To the author's knowledge, the divider exhibits a competitive power dissipation and the highest FOM among silicon based frequency dividers that operating higher than 70 GHz.展开更多
A new,compact,and dual-band dual-polarized duplex(D3)phased array architecture is proposed in this study.In contrast to studies reported previously,this design integrates four independent beamforming systems within a ...A new,compact,and dual-band dual-polarized duplex(D3)phased array architecture is proposed in this study.In contrast to studies reported previously,this design integrates four independent beamforming systems within a single printed circuit board(PCB),enabling the proposed 1×4 phased array to transmit or receive simultaneously vertically and horizontally polarized signals at 28 and 38 GHz,thereby supporting concurrent,dual-band,and dual-polarized four-beam operations.In addition,the exceptional frequency selectivity of the phased array facilitates frequency-division duplex operations.By adopting a brick-type architecture,the proposed phased array achieves two-dimensional scalability,which allows it to serve either as a standalone,small-scale phased array,or as a sub-block for larger-scale arrays.A novel,dual-polarized end-fire magnetoelectric dipole antenna was developed as the radiating e lement for the phased array.This antenna exhibits an impedance bandwidth of return loss below-10 d B across the frequency range of 24.8-40.3 GHz(47.6%),which represents one of the broadest operating bands reported for PCB-based,co-apertured,and dual-polarized end-fire antennas.Experimental validation of the fabricated phased array demonstrated that the two orthogonal polarizations could achieve beamscanning ranges exceeding 90°and 60°at 28 and 38 GHz,respectively.The measured effective isotropic radiated power values exhibited distinct frequency selectivities between the two bands.To the best of our knowledge,this is the first demonstration of a D3phased array that presents a promising solution for beyond fifth-generation(B5G)and sixth-generation(6G)millimeter-wave multi-standard systems.展开更多
Millimeter-wave(mmWave)technology has been well studied for both outdoor long-distance transmission and indoor short-range communication.In the recently emerging fiber-to-the-room(FTTR)architecture in the home network...Millimeter-wave(mmWave)technology has been well studied for both outdoor long-distance transmission and indoor short-range communication.In the recently emerging fiber-to-the-room(FTTR)architecture in the home network of the fifth generation fixed networks(F5G),mmWave technology can be cascaded well to a new optical network terminal in the room to enable extremely high data rate communication(i.e.,>10 Gb/s).In the FTTR+mmWave scenario,the rapid degradation of the mmWave signal in long-distance transmission and the significant loss against wall penetration are no longer the bottlenecks for real application.Moreover,the surrounding walls of every room provide excellent isolation to avoid interference and guarantee security.This paper provides insights and analysis for the new FTTR+mmWave architecture to improve the customer experience in future broadband services such as immersive audiovisual videos.展开更多
基金supported by National Natural Science Foundation of China under Grant 61701114the National Science and Technology Major Project under Grant 2017ZX03001020the Scientific Research Foundation of Graduate School of Southeast University (Grant No. YBJJ1811)
文摘A layout and connection optimization for static frequency divider is presented. The layout optimization provides a new circle topology transistors placement and reasonable connection structure, which reduces the parasitic effectively and enables self-oscillation frequency enhancement. Besides, bandwidth enhancement techniques based on a center-tap capacitor in input balun design and inductive peaking in latch design are adopted to improve further high frequency performance with low power consumption. As a proof of concept, design of a divide-by-2 static frequency divider in 0.13 μm SiGe BiCMOS technology is reported. With single-ended input clock signal, the divider is measured to be operated from 40 to 90 GHz. Phase noise measurements of a 90 GHz input clock signal indicate ideal behavior with no measurable noise contribution from the divider. The divider followed by a buffer that can deliver more than-10 dBm output power, which is sufficient to drive succeeding stage. To the author's knowledge, the divider exhibits a competitive power dissipation and the highest FOM among silicon based frequency dividers that operating higher than 70 GHz.
基金supported in part by the National Science Foundation of China(62301152 and 62188102)the Natural Science Foundation of Jiangsu Province(BK20230819)+1 种基金the Fundamental Research Funds for the Central Universities(2242022k60003)the Youth Talent Promotion Foundation of Jiangsu Science and Technology Association(TJ-2023-074)。
文摘A new,compact,and dual-band dual-polarized duplex(D3)phased array architecture is proposed in this study.In contrast to studies reported previously,this design integrates four independent beamforming systems within a single printed circuit board(PCB),enabling the proposed 1×4 phased array to transmit or receive simultaneously vertically and horizontally polarized signals at 28 and 38 GHz,thereby supporting concurrent,dual-band,and dual-polarized four-beam operations.In addition,the exceptional frequency selectivity of the phased array facilitates frequency-division duplex operations.By adopting a brick-type architecture,the proposed phased array achieves two-dimensional scalability,which allows it to serve either as a standalone,small-scale phased array,or as a sub-block for larger-scale arrays.A novel,dual-polarized end-fire magnetoelectric dipole antenna was developed as the radiating e lement for the phased array.This antenna exhibits an impedance bandwidth of return loss below-10 d B across the frequency range of 24.8-40.3 GHz(47.6%),which represents one of the broadest operating bands reported for PCB-based,co-apertured,and dual-polarized end-fire antennas.Experimental validation of the fabricated phased array demonstrated that the two orthogonal polarizations could achieve beamscanning ranges exceeding 90°and 60°at 28 and 38 GHz,respectively.The measured effective isotropic radiated power values exhibited distinct frequency selectivities between the two bands.To the best of our knowledge,this is the first demonstration of a D3phased array that presents a promising solution for beyond fifth-generation(B5G)and sixth-generation(6G)millimeter-wave multi-standard systems.
文摘Millimeter-wave(mmWave)technology has been well studied for both outdoor long-distance transmission and indoor short-range communication.In the recently emerging fiber-to-the-room(FTTR)architecture in the home network of the fifth generation fixed networks(F5G),mmWave technology can be cascaded well to a new optical network terminal in the room to enable extremely high data rate communication(i.e.,>10 Gb/s).In the FTTR+mmWave scenario,the rapid degradation of the mmWave signal in long-distance transmission and the significant loss against wall penetration are no longer the bottlenecks for real application.Moreover,the surrounding walls of every room provide excellent isolation to avoid interference and guarantee security.This paper provides insights and analysis for the new FTTR+mmWave architecture to improve the customer experience in future broadband services such as immersive audiovisual videos.
