Constant gain modified antipodal vivaldi antenna with rake-like wires operating over 3.1-10.6 GHz


KÜÇÜKSARI Ö., ÇİMEN S., ÇAKIR G.

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol.60, no.5, pp.1205-1211, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 5
  • Publication Date: 2018
  • Doi Number: 10.1002/mop.31134
  • Journal Name: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1205-1211
  • Keywords: antipodal vivaldi antenna, constant gain antenna, flat gain antenna, ultra-wideband antenna, SLOT ANTENNA, DESIGN, PATTERN
  • Kocaeli University Affiliated: Yes

Abstract

The main aim of this study is to design an Ultra-Wide Band antenna with an almost constant level of gain over 3.1-10.6 GHz. A modified antipodal Vivaldi antenna with rake-like wires (called MAVARW-III), is designed for this goal. The MAVARW-III has two flared metal arms with rake-like wires printed on a dielectric substrate. Rake-like wires are primarily associated with balancing the gain over the operating bandwidth of the antenna. The proposed MAVARW-III has 7.90 dB minimum gain level over the bandwidth in simulations. The difference between the minimum and maximum value of the gain is <1.55 dB over whole frequency range in simulations. The proposed MAVARW-III is characterized both numerically and experimentally with a good agreement. The given design approach can be extended to relatively larger or smaller MAVARWIIIs to achieve almost constant gain level over desired other frequency bands.