Broadening the beam‐width of microstrip antenna by the induced vertical currents. Issue 2 (11th December 2017)

• Record Type: Journal Article
• Authors: Yang, Guangwei; Li, Jian‐Ying; Wei, Dujuan; Zhou, Shigang; Yang, Jiangjun
• Is Part Of: IET microwaves, antennas & propagation. Volume 12:Issue 2(2018)
• Page Start: 190
• Page End: 194
• Publication Date: 2017-12-11
• Subjects: microstrip antennas -- antenna feeds -- antenna radiation patterns; microstrip antenna -- induced vertical currents -- beam‐width broadening -- aperture couple feed microstrip antenna -- E‐field -- wide beamwidth aperture couple feed microstrip antenna -- half‐power beamwidth -- frequency 9 GHz; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2017.0295
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : In this study, a method to broaden the beamwidth of an aperture couple feed microstrip antenna is investigated. Two metal walls are put at the bilateral sides of an original microstrip antenna in the E ‐plane ( xoz ‐plane). The vertical current on the metal walls is induced by E ‐field from the horizontal current on the radiating patch of the microstrip antenna. The beamwidth of the antenna is broadened by both the horizontal and vertical currents. A novel wide beamwidth aperture couple feed microstrip antenna (WBMA) is designed according to the proposed method. The simulated and measured reflection coefficients and radiation patterns of the WBMA are presented and compared with the original microstrip antenna. Compared with the original microstrip antenna, the half‐power beamwidth (HPBW) is obviously improved, which the HPBW is 236° in the E ‐plane and 124° in the H ‐plane at 9.0 GHz. Good radiation characteristics of the new structure antenna have been obtained in the whole operating frequency band.