Very small planar broadband monopole antenna with hybrid trapezoidal–elliptical radiator. Issue 4 (27th February 2017)

• Record Type: Journal Article
• Authors: Dastranj, Aliakbar
• Is Part Of: IET microwaves, antennas & propagation. Volume 11:Issue 4(2017)
• Page Start: 542
• Page End: 547
• Publication Date: 2017-02-27
• Subjects: broadband antennas -- planar antennas -- monopole antennas -- microstrip antennas -- slot antennas -- antenna radiation patterns -- omnidirectional antennas; hybrid trapezoidal‐elliptical radiator -- very small compact planar broadband printed monopole antenna -- PMA -- overlap region -- elliptical patch -- trapezoidal patch -- etching -- symmetrical quarter‐elliptical slot -- ground plane -- ellipticity ratio optimisation -- impedance bandwidth improvement -- omnidirectional radiation pattern -- antenna gain -- radiation efficiency -- nearly constant group delay -- impedance bandwidth enhancement -- frequency 2.4 GHz to 18.6 GHz; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2016.0701
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A compact and broadband printed monopole antenna (PMA) with a hybrid trapezoidal–elliptical radiator is proposed. An overlap region between the trapezoidal and elliptical patches is introduced to enhance the impedance bandwidth. Meanwhile, by etching two symmetrical quarter‐elliptical slots on the ground plane and optimising the ellipticity ratio, further improvement in the impedance bandwidth is achieved. Measured results show that the antenna can cover the frequency range of 2.4–18.6 GHz (| S 11 | < −10 dB) while its total size is only 25 × 25 × 1.2 mm 3 . In addition, omnidirectional radiation patterns, desirable gain, high radiation efficiency and nearly constant group delay are obtained. Compared with recent PMAs, the proposed antenna has a smaller size and wider bandwidth, simultaneously.