Invited Talk: Shiwen Lei, University of Electronic Science and Technology of China

Special session 18:  New Methods on Array Antenna Synthesis and Gain Enhancement

Short Bio: 
Shiwen Lei (M’16) received his Ph.D. degree in signal and information processing from UESTC in Jun. 2015. From Sept. 2015 to Aug. 2017, he was a Post-Doctoral Researcher with Lund University, Lund, Sweden, where he was involved in sparse signal sampling and recovering. From Nov. 2017 to Mar. 2020, he was a Post-Doctoral Researcher with the School of Electronic Science and Engineering (ESE), UESTC, where he was involved in array antenna theory and technology. He is currently work as an Associate Research Fellow with the School of ESE in UESTC. He has authored or co-authored about 40 journal and conference papers and about 20 patents. His current research interests include adaptive signal processing, array antenna theory, sparse signal processing, and so on.

Title: Research on Power Gain Enhancement with Wide-Beam Mainlobe Array Antenna

Abstract:
The wide-beam array antenna has widely been used in many fields, such as radar, sonar, and navigation to wireless communications, etc. One typical application for wide beam is the receiving of satellite (e.g., ASIASTAR satellite) multimedia signals, when antennas are installed on the roof of moving vehicles. The power of the signal of interest (SOI) for this application would greatly reduce, even to −130 ~ −110 dB, due to the large-scale fading, the multipath effect, the shading effect, and so on. To effectively recover the SOI from the noise/clutter, the power gain of the receiving array antenna should be as high as possible. In addition, considering that vehicles would maneuver on the road, wide beam is required to ensure the main lobe pointing at the satellite all the time. This requirement reversely causes the power gain for wide-beam applications would be not as high as that for narrow-beam applications. In this sense, a small increasement, even 1 dB, of the power gain in main lobe would possibly improve the array antenna receiving ability. Given a wide beam, the array antenna is expected to be capable of working in all directions in such main lobe that ensures the receiving stability along with the randomly moving of vehicles. Hence, the minimum power gain in wide main lobe should be as high as possible and how to synthesize such a power gain pattern is of interest both in theory and in practice.