Tapered-slot radiation-traveling wave mechanism inspired extreme wideband efficient antenna with ultra-low SLL

ABSTRACT

The manuscript proposes a radiation-inspired tapered-slot-traveling wave mechanism rooted in the combined profile of an efficient extreme wideband (EWB) antenna with ultra-low side-lobe level (SLL), operating in 1–50 GHz. The proposed antenna design, proximity coupled by a transmission line section (50 Ω) followed by differential dual-stub (stethoscope kind), uses two broad banding techniques – The first part of the profile is designed according to the radiation profile of a tapered slot and the second profile section comprises a tapered director (funnel kind) along with an array of reflectors on either side of the flared throat. A comprehensive mathematical analysis of both tapered profiles along with the relationship of different dimensional parameters of the geometry to arrive at an optimized compact and efficient design is narrated. Further, the gain is improved from 8 dB to 12.5 dB by introducing the director and the reflectors. The measured result of the antenna is extreme wideband with high peak gain, ultra-low SLL (Max. −51.0 dB), radiation efficiency (89−94%), improved XPD (−33 dB and below), and good transient response when compared to other state-of-art EWB tapered antenna designs. The proposed antenna is a potential sensor for high resolution/precision, imaging/positioning, and energy harvesting applications.

KEYWORDS:

• 5G and beyond communications
• broadband Antennas
• energy harvesting
• high resolution and precision sensors
• impedance bandwidth
• radiation
• SLL, XPD

Disclosure statement

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