Low profile pattern‐switchable multibeam antenna consisting of four L‐shaped microstrip lines. Issue 11 (21st May 2018)

• Record Type: Journal Article
• Authors: Zhang, Wei; Pal, Arpan; Mehta, Amit; Mirshekar‐Syahkal, Dariush; Nakano, Hisamatsu
• Is Part Of: IET microwaves, antennas & propagation. Volume 12:Issue 11(2018)
• Page Start: 1846
• Page End: 1851
• Publication Date: 2018-05-21
• Subjects: microstrip lines -- multibeam antennas -- photonic band gap -- antenna radiation patterns -- impedance matching -- beam steering -- UHF antennas -- reflector antennas; frequency 2.45 GHz -- vehicular tracking -- high speed Internet -- conducting reflector -- full azimuth beam steering -- L‐shaped microstrip lines -- resonant frequency -- impedance matching network -- free space wavelength -- antenna profile -- planar electromagnetic band gap substrate -- pattern switchable applications -- pattern‐switchable multibeam antenna; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2017.0954
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A multibeam antenna consisting of a set of four L‐shaped microstrip line sections is presented for pattern switchable applications. A planar electromagnetic band gap substrate is implemented to reduce the antenna profile to λ 2.45 /35, where λ 2.45 is the free space wavelength at a design frequency of 2.45 GHz. An impedance matching network is integrated on the lowest layer below a ground plane. The microstrip lines have a resonant frequency of 2.45 GHz and are excited separately. When one of the strips is excited, the antenna generates a tilted beam with a gain of 8.6 dBi. By switching the excitation strip sequentially, a full azimuth beam steering is achieved. When the antenna is located above a large conducting reflector, the antenna maintains its performance. Thus, the antenna is a candidate for moving objects with high speed internet and vehicular tracking.