Removal of scan blindness of phased array antenna using fourth-order Hilbert curved EBG structure

ABSTRACT

It has been shown that the Hilbert curved electromagnetic band gap (HC-EBG) structure effectively reduces the surface wave excitation in the substrate. This paper investigates the performance of HC-EBG structure for probe-fed microstrip patch phased array antenna. The results show that not only the mutual coupling between two elements is reduced about 20 dB, but also the blind angle is removed. Based on the proposed method, a probe-fed microstrip patch antenna phased array 9 × 7 elements are designed and simulated that shows the blind angle has been eliminated without increasing the dimensions of the antenna. Simulation results show improvement in the active reflection coefficient of center element and gain of the array.

KEYWORDS:

• HC-EBG
• surface wave
• blind angle

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Arya Kari

Arya Kari was born in Behbahan, Iran, in 1993. He received the B.Sc. and M.Sc. degrees in communications engineering (Electromagnetic Fields) from the Birjand University, Birjand, Iran, and Isfahan University of Technology (IUT), Isfahan, Iran, in 2015 and 2019 respectively. His master's research was on scan blindness in antenna array.

Abolghasem Zeidaabadi Nezhad

Abolghasem Zeidaabadi Nezhad was born in Sirjan, Iran, in 1961. He received the B.Sc. degree in electronics engineering from the Shahid Bahonar University of Kerman, Kerman, Iran, in 1988, and the M.Sc. and Ph.D. degrees in communication engineering from the Sharif University of Technology, Tehran, Iran, in 1991 and 1997, respectively. Since 1997, he has been with the Isfahan University of Technology, Isfahan, where he is currently an Associate Professor with the Department of Electrical and Computer Engineering. His current research interests include antennas and microwave engineering.

Ahmad Bakhtafrouz

Ahmad Bakhtafrouz received the B.S., M.S. and Ph.D. degrees in electrical engineering from the Isfahan University of Technology (IUT), Isfahan, Iran, in 2006, 2009, and 2015, respectively. In May 2016, he joined the faculty of the IUT, where he is currently an Assistant Professor with the Electrical and Computer Engineering Department. His current research interests include millimeter-wave antennas, plasmonic devices, and periodic structures such as electromagnetic bandgap structures (EBGs), artificial magnetic conductors (AMCs), and frequency selective surfaces (FSSs).