Design of a Compact, Planar, Wideband, Overlapped, Bow-Tie Antenna in a Single Layer with Stable Bi-Directional Radiation Patterns

• Published in: Applied sciences 2024-10, Vol.14 (20), p.9555
• Main Authors: Smith, Lauryn, Lim, Sungkyun
• Format: Article
• Language: English
• Subjects: Antennas; Antennas (Electronics); Bandwidths; bi-directional antennas; bow-tie antennas; Design; electrically small antennas; Geometry; Investigations; planar antennas; printable antennas; Radiation; Simulation; wideband antennas
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app14209555

In this paper, a planar, bow-tie antenna with an enhanced bandwidth and a bi-directional radiation pattern is proposed. The concept of multi-resonance is applied by implementing the superposition of three different bow-tie components with various radii and flare angles in an overlapped fashion into a single element, resulting in a significant increase in bandwidth. The antenna has an electrical size, kr, of 1.10, calculated at the lowest frequency of operation. The proposed antenna is simulated, and a prototype is fabricated for verification by measurement. The result is a wide −10 dB bandwidth of 80.3% (1.23–2.88 GHz) from the measurements. The antenna also maintains a bi-directional radiation pattern, with a negligible difference between the forward and backward realized gains, within the entire −10 dB bandwidth. The measured realized gain values in the forward and backward directions are between 1.5 dBi and 3.7 dBi over the −10 dB bandwidth. The comparison of the measurement and simulation results shows good agreement.