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Research Center for RF & Photonic Information Processing

College of Information Science and Electronic Engineering at Zhejiang University

Research Highlights

Research topic: Multiplexed Millimeter Wave Communication with Dual Orbital Angular Momentum (OAM) Mode Antennas


Communications using the orbital angular momentum (OAM) of radio waves have attracted much attention in recent years. In this paper, a novel millimeter-wave dual OAM mode antenna is cleverly designed, using which a 60GHz wireless communication link with two separate OAM channels is experimentally demonstrated. The main body of the dual OAM antenna is a traveling-wave ring resonator using two feeding ports fed by a 90° hybrid coupler. A parabolic reflector is used to focus the beams… Read more

Research topic: The Capacity Gain of Orbital Angular Momentum Based Multiple-Input-Multiple-Output System


In this work, we compare the technique of using uniform linear array consist of circular traveling-wave OAM antennas for multiplexing with the conventional multiple-in-multiple-out (MIMO) communication method, and numerical results show that the OAM based MIMO system can increase channel capacity while communication distance is long enough.Our results reveal that OAM waves are complementary with MIMO method. OAM waves multiplexing is suitable for long-distance line-of- sight (LoS) communications or communications in open area where the multi-path effect is weak and can be used in massive MIMO systems as well. Read more

Latest News

  • 2016.10.06: Another POSTDEADLINE paper on ‘260Gbit/s Photonic-Wireless Link in the THz Band’is accepted to present at the IEEE Photonics Conference (IPC), which is held in Hawaii, USA. This work is collaborated among NETLAB and KTH in Sweden, DTU in Denmark, Tianjin University and Zhejiang University in China. Up to now, we have successfully demonstrated the record datarates of 60Gbit/s, 160Gbit/s and 260Gbit/s in the 300-500GHz band.
  • 2016.09.30: Dr. Yu gave an invited talk ‘Exploring THz frequency bands for high speed wireless communications’ at the 41st International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) conference held in Copenhagen, Denmark. In the talk, he reviewed the state-of-the-art work about high speed millimeter-wave/THz communication.
  • 2016.07.05: One paper entitled ‘THz Photonics-Wireless Transmission of 160Gbit/s Bitrate’ is accepted as a POSTDEADLINE paper at the 21st Opto Electronics and Communications Conference/International Conference on Photonics in Switching 2016 (OECC/PS 2016), which is held this year in July 2016, Niigata, Japan. This work is conducted by Dr. Yu from the RPIP, in close collaboration with Technical University of Denmark and Tianjin University.
  • 2016.05.21: Prof. Xianmin ZHANG, Associate Prof. Shilie ZHENG and 2 Ph.D. students attended the IEEE International Microwave Symposium (IMS). The 2016 IEEE International Microwave Symposium (IMS2016) to be held in San Francisco, California, 22-27 May 2016. IMS2016, organized by the IEEE Microwave Theory and Technique Society (MTT-S), is the premier conference for attendees to learn about the latest information in the RF and microwave industry.