A Wideband Monoconical Antenna for Airborne Applications With a Null-Filled Radiation Pattern

• Published in: IEEE antennas and wireless propagation letters 2022-06, Vol.21 (6), p.1158-1162
• Main Authors: Kim, Wonkyo, Shin, Geonyeong, Lee, Kyung-Won, Mun, Byeonggwi, Yoon, Ick-Jae
• Format: Article
• Language: English
• Subjects: Aircraft; Antenna measurements; Antenna radiation patterns; Antennas; Broadband; Broadband antennas; Current distribution; Dipole antennas; Electric fields; Figure of merit; Impedance; Impedance matching; Monoconical antennas; null-filled radiation pattern; Radiation; Radiators; rotational current distribution; Slot antennas; wideband antennas
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2022.3159989

A wideband monoconical antenna with a null-filled radiation pattern for airborne applications is presented. A rotating current distribution, which radiates an electric field at the null point ( θ = φ = 0°) of an omnidirectional radiation pattern of a conventional monoconical antenna, is formed using the proposed slotted structure in a monoconical radiator. In the proposed design, the null point is effectively filled over the 1:12 impedance-matched frequencies, while the size of the reference monoconical antenna is maintained. A figure of merit composed of the electric field intensity in the main radiation area (0° ≤ θ ≤ 45° and 0° ≤ φ ≤ 360°) and the profile of the antenna shows that the proposed antenna performs better than a conventional monoconical antenna or a fan-dipole antenna used in airborne applications. The impedance and radiation performances of the proposed antenna are verified experimentally from a 5.85:1 scaled built prototype.