1. Full name : Luong Xuan Truong                                 2. Sex: Male

3. Date of birth: 25 / 10/ 1987                                        4. Place of  birth: Nam Dinh

5. Admission decision number:  985/QĐ-ĐT        Dated 04/12/2014

6. Changes in academic process:

The academic process is allowed to extend by Decision                   Dated     /   /     .

7. Official thesis title: Study on developing high gain and low side lobe level linear antenna arrays using series-fed networks and Bat algorithm.

8. Major: Telecommunications Engineering                                9. Code: 9510302.02

10. Supervisors:

            - Assoc. Prof. Tran Minh Tuan, PhD

            - Assoc. Prof. Trương Vũ Bằng Giang, Dr.-Ing

11. Summary of the new findings of the thesis:

(1) The thesis uses the Bat algorithm for synthesizing array factors of linear array antennas that meet the requirement of sidelobe level compression by the methods: amplitude-only control and inter-distance control. Then, the thesis proposes a method for the development of a series-fed network (one input and 2N outputs) that meet the amplitude excitation weights and inter-distance distribution gotten from the Bat algorithm.

(2) Propose a method to develop linear antenna arrays based on the proposed series-fed network in two case studies, as follows:

i) A 10 Vivaldi antenna array which has a high gain of 16.5 dBi and a low sidelobe level of -25 dB to -27 dB in the bandwidth of 140 MHz (3.45-3.59 GHz).

ii) A 10 double-sided printed dipole (DSPD) antenna array which has a high gain of 17 dBi, a bandwidth of 570 MHz (3.26-3.83 GHz), and a low first sidelobe level of -40 dB at the center frequency of 3.5 GHz.

12. Practical applicability, if any:

The solution and progress of design new series-fed network can be used for designing linear antenna arrays for differrent requirements of SLL suppression and null placement.

The developed antenna arrays in the thesis can be used in wireless systems opreating in the frequency band of 3.5 GHz such as fixed, mobile and radiolocation. They can meet the demand of sidelobe optimisation for handling transmitting or receiving radio interference when these wireless systems use sharing frequency spectrum.

13. Further research directions, if any:

Develop a method to apply the Bat algorithm on designing and optimizing a feeding network of linear antenna array by integrating this algorithm into a simulation software and/or connecting multi simulation software.

Research and develop a linear antenna array with a high gain, a wideband and low SLL using the complex excitation weight control technique.

14. Thesis-related publications:

L.X. Truong, T.V.B. Giang, T.M.Tuan (2019), “Design of Vivaldi Antenna Array with a Back Reflector for Low Side Lobe Level and High Gain”, Conference Proceedings of International Conference on Advanced Technologies for Communicationes (ATC), pp. 2-6.

L.X. Truong, T.V.B. Giang, T.M.Tuan (2019), “Application of Bat Algorithm on the Design of a Linear Microstrip Antenna Array for Pattern Nulling”, Conference Proceedings of International Conference on Advanced Technologies for Communicationes (ATC), pp. 198-203.

L.X.Trường, T.V.B.Giang, T.M.Tuấn (2019), “Thiết Kế Mạng Tiếp Điện Song Hành Cho Mảng Anten Tuyến Tính Có Yêu Cầu Đặt Dải Rộng Các Điểm Không Trên Giản Đồ Bức Xạ”, Kỷ yếu Hội thảo quốc gia lần thứ 23 về Điện tử, Truyền thông và Công nghệ thông tin (REV-ECIT 2019), tr. 85-89.

L.X. Trường, T.V.B.Giang, T.M.Tuấn (2018), “A new Feeding Network Design based on Bat Algorithm for Pattern-Nulling of a Linear Antenna Array”, Kỷ yếu Hội thảo quốc gia lần thứ 22 về Điện tử, Truyền thông và Công nghệ thông tin (REV-ECIT 2018), tr. 184-187.

L.X. Truong, T.M. Tuan, T.V.B. Giang, V.Q. Tao (2015) “Design A Microstrip Antenna With Defected Ground Structure”, Conference Proceedings of International Conference on Advanced Technologies for Communicationes (ATC), pp. 160 – 163.

L.X. Truong, T.M. Tuan, T.V.B. Giang, N.C. Tien (2015), “Design A Log Periodic Fractal Koch Microstrip Antenna For S Band And C Band Applications”, Conference Proceedings of International Conference on Advanced Technologies for Communications (ATC), pp. 556 – 560.

L.X. Truong, T.V.B. Giang, T.M. Tuan (2020), “A New Linear Printed Vivaldi Array Antenna with Low Sidelobe Level and High Gain for Applications in the Band of 3500 MHz”, REV-Journal on Electronics and Communications, Vol. 10, No. 1–2, pp. 30-37.

L.X.Truong, T.V.B.Giang, T.M.Tuan (2020), “A New Design of a Linear Double-sided Printed Dipole Array Based on Bat Algorithm for Interference Suppression in the First Sidelobe Direction”, IET Microwaves, Antennas & Propagation, Vol. 14 (12), pp. 1371 –1376.