Antipodal tapered slot antenna array using broadband decoupling structure for mutual coupling reduction

Abstract

In this article, an effective method to reduce the mutual coupling between the antipodal tapered slot antenna (ATSA) array is proposed. This method is mainly implemented by loading a set of decoupling structures (DS) perpendicular to the dielectric substrate between two antenna elements. The proposed DS can provide transmission forbidden band which can effectively prevent leaked electromagnetic waves. DS can operate in most frequency bands within 4 to 17.5 GHz. It can enhance about 23 dB isolation between the ATSA array without affecting bandwidth and radiation characteristics. The proposed ATSA arrays are fabricated and tested. The measured results can verify its excellent properties. The proposed broadband decoupling method is a suitable candidate for restrain mutual coupling of ultra‐wideband planar end‐fire antennas. This design sheds new light on broadband decoupling.

Integration of the modified Butler matrix and decoupling network for beam‐steering antenna array

“…In microstrip antenna, many mutual coupling reduction techniques have been proposed to compensate for the effect of mutual coupling and generally categorize in three solutions. [12][13][14][15][16] The first classification is introducing various defected ground structures (DGS) on the ground to improve the isolation and consequently decrease the mutual coupling. 17 The second sort is employing an electromagnetic band gap (EBG) structures to suppress the surface wave between elements and then reduce the mutual coupling.…”