New design of a linear double-sided printed dipole array based on bat algorithm for interference suppression in the first sidelobe direction

• Published in: IET microwaves, antennas & propagation Vol. 14; no. 12; pp. 1371 - 1376
• Main Authors: Truong, Luong Xuan, Vu-Bang Giang, Truong, Tuan, Tran Minh
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 07.10.2020
• Subjects: amplitude‐only control technique; antenna feeds; antenna radiation patterns; back reflector; bandwidth 600.0 MHz; bat algorithm; dipole antenna arrays; double‐sided printed dipole antenna array; DSPD antenna array; excitation power distribution; E‐plane; FR4 substrate; frequency 3.3 GHz to 3.9 GHz; FSLL; interference suppression; linear double‐sided printed dipole array; microstrip antenna arrays; null deep level; reflector antennas; Research Article; Rogers RO4003C; series‐fed network; sidelobe direction; single null; E-plane; interference suppression; Rogers RO4003C; reflector antennas; dipole antenna arrays; FSLL; double-sided printed dipole antenna array; microstrip antenna arrays; series-fed network; bandwidth 600.0 MHz; single null; bat algorithm; DSPD antenna array; antenna radiation patterns; FR4 substrate; linear double-sided printed dipole array; sidelobe direction; null deep level; antenna feeds; excitation power distribution; frequency 3.3 GHz to 3.9 GHz; back reflector; amplitude-only control technique
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/iet-map.2019.1065

This study proposes a design of a double-sided printed dipole (DSPD) antenna array with a low first sidelobe level (FSLL) for interference suppression. The proposed array consists of ten DSPD antennas based on the Rogers RO4003C substrate (ɛr = 3.55). The FSLL has been compressed by imposing a single null at the centre of the first sidelobe. The excitation power distribution of the array has been calculated by using the bat algorithm with the amplitude-only control technique and has been implemented by a series-fed network. A back reflector, which is based on an FR4 substrate (ɛr = 4.4), has been used to improve the maximum gain. The simulation results show that the FSLL can be reduced with a null deep level (NDL) of −40 dB in the E-plane at the frequency of 3.5 GHz, while the maximum gain of the array is around 17.7 dBi, and the bandwidth is 600 MHz (3.3–3.9 GHz) with −10 dB of S11. A prototype of the proposed DSPD antenna array has been fabricated and measured. A good agreement can be achieved between simulation and measurement results.