Novel Compact UWB Vivaldi Nonuniform Slot Antenna With Enhanced Bandwidth

Sahar Saleh, Widad Ismail, Intan Sorfina Zainal Abidin, Moh'd Haizal Jamaluddin, Mohammed H. Bataineh, Asem S. Al-Zoubi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A new theory called Vivaldi nonuniform slot profile antenna (VNSPA) is developed based on the nonuniform transmission lines (NTLs) theory and applied to reduce the size of the predesigned compact ultrawide band (UWB) Vivaldi-tapered slot antenna (VTSA) without affecting its performance in terms of matching and bandwidth. Using this theory, 33% of the taper slot length is reduced, resulting in a novel compact UWB Vivaldi nonuniform slot antenna (VNSA). Furthermore, compactness is achieved by performing parametric studies on VNSA with a final 51.94% size reduction. MATLAB optimization codes, CST simulation, and prototype manufacturing and measurement are used to validate the new theory. The proposed antenna provides a measured S11 < -10.89 dB through 2.9-13.55 GHz with 2.91% and 5.8% bandwidth and maximum realized gain enhancement, respectively, as compared with VTSA's results. The effectiveness of VNSPA theory is proven by comparing the simulated and measured findings of VNSA and VTSA.

Original languageEnglish
Pages (from-to)6592-6603
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume70
Issue number8
DOIs
Publication statusPublished - 1 Aug 2022
Externally publishedYes

Keywords

  • Microstrip to slot (M/S) transition
  • Vivaldi nonuniform slot antenna (VNSA)
  • Vivaldi nonuniform slot profile antenna (VNSPA) theory
  • Vivaldi-tapered slot antenna (VTSA)
  • nonuniform transmission line (NTL)
  • ultrawide band (UWB)

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