Penta‐band circularly polarised antenna using a lumped capacitor. Issue 8 (1st June 2016)

• Record Type: Journal Article
• Authors: Hoang, The Viet; Le, Tuan Tu; Li, Qui Yu; Park, Hyun Chang
• Is Part Of: IET microwaves, antennas & propagation. Volume 10:Issue 8(2016)
• Page Start: 856
• Page End: 862
• Publication Date: 2016-06-01
• Subjects: microstrip antennas -- monopole antennas -- wireless LAN -- microwave antennas -- satellite antennas -- capacitors; penta band circularly polarised antenna -- lumped capacitor -- simple printed monopole antenna -- CP radiation characteristics -- wireless local area network -- WLAN -- worldwide interoperability -- microwave access -- X‐band satellite communication applications -- notched rectangular ground plane -- inverted‐U‐shaped -- I‐shaped -- inverted‐L‐shaped radiators -- penta‐band CP antenna; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2015.0742
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A very simple printed monopole antenna with penta‐band circularly polarised (CP) radiation characteristics for wireless local area network (WLAN), worldwide interoperability for microwave access, and downlink of the X‐band satellite communication applications is proposed for the first time. The antenna comprises a notched rectangular ground plane and a radiating patch consisting of inverted‐U‐shaped, I‐shaped, and inverted‐L‐shaped radiators, and creates four CP modes operating at 2.4/3.5/5.8/7.5 GHz frequency bands. By placing a lumped capacitor of 0.5 pF in the gap between the I‐shaped radiator and the inverted‐L‐shaped radiator, an extra CP mode at 5.2 GHz WLAN band is generated, thus completing the penta‐band CP antenna. The measured −10 dB impedance bandwidth of the demonstrated antenna is 340 MHz (2.37–2.71 GHz) and 4.8 GHz (3.2–8 GHz), and the measured 3 dB axial‐ratio bandwidth is 16.6, 13.5, 2.9, 2.4, and 4% in five distinct bands of 2.1−2.48, 3.1−3.55, 5.1−5.25, 5.76−5.9, and 7.45−7.75 GHz.