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A world-leading 8-antenna/12-antenna array system

     A world-leading 8-antenna/12-antenna array system, promising for use in the future 5G smartphone, was successfully developed by Professors Kin-Lu Wong and Chao-Kai Wen in the massive MIMO antenna system research center (MMASRC) at NSYSU. The throughput of the antenna array in a 12x8 MIMO system was measured to be about 3.8 Gbps with 256-QAM modulation and a 100-MHz bandwidth at 3.5 GHz band. The obtained throughput is 30 times higher than that of today’s 4G smartphone.  
    “The antenna arrays herein are mainly for receiving signals. With the obtained throughput, it takes the 12-antenna smartphone less than 1 second to download a 3 Gigabit film online,” explained Professor Wong, an IEEE fellow and the leader of the MMASRC.
    In conventional antenna theory, the spacing between two antennas is required to be at least 0.5 wavelength to avoid the mutual interference. However, the antenna research team at NSYSU has pushed the frontiers of knowledge forward, successfully reducing the minimum spacing to 0.05 wavelength and allowing multiple antennas to be arranged in a narrow space between the smartphone’s screen and frame.
    Professor Wen at the Institute of Communication Engineering at NSYSU led his research team to develop a 12x8 MIMO testbed that can be used for measuring several important performance metrics with very high accuracy. With a real-time analysis of the signal-to-noise ratio, channel capacity, and throughput, this design is proved to be an effective solution.

 

A novel portable microwave Doppler radar   

     A novel portable microwave Doppler radar, developed by the research team led by Professor Tzyy-Sheng Hong in the RF & Microwave Laboratory at NSYSU, attracted a company, Vitalmetric LLC, in Florida, USA. These two parties signed a technical transfer, with a license fee of 200 million USD and annual royalty of 3% global sales revenue.
    “This miniature radar can precisely monitor the health condition of livestock, monitoring their pulse and respiration to identify any unhealthy animals without physical contact,” said Prof. Horng, an IEEE fellow and the leader of the RF & Microwave Laboratory.
    According to the British Agriculture and Horticulture Development Board, the total number of cows worldwide is over 250 million. Accurately monitoring health condition of cows can greatly reduce the mortality rate and guarantee the quality of dairy products. Professor Horng’s portable radar solves two problems the dairy farmers face in cow health care. First, cows are hard to control under physical inspection. Second, the pulse and respiratory signals are too weak to detect reliably. Therefore, this innovative radar being applied to the dairy industry is expected to bring prosperous opportunities in future.
    This radar sensing technique employs two principles, the Doppler effect and injection locking of oscillators. This self-injection-locked radar features small size, low power and high sensitivity, and can be built in mobile phones, watches, and other personal objects, with a wide range of applications beyond the health monitoring of cows. It can also be used in the baby monitors, life detectors, home surveillance systems, and many more.