Miniature multi‐band monopole antenna using spiral ring resonators for radiation pattern characteristics improvement. Issue 6 (1st March 2013)

• Record Type: Journal Article
• Authors: Wan, Y.‐T.; Yu, D.; Zhang, F.‐S.; Zhang, F.
• Is Part Of: Electronics letters. Volume 49:Issue 6(2013)
• Page Start: 382
• Page End: 384
• Publication Date: 2013-03-01
• Subjects: frequency -- frequency -- frequency; antenna radiation patterns -- coplanar waveguides -- microwave antennas -- monopole antennas -- multifrequency antennas -- strips -- WiMax -- microwave resonators -- omnidirectional antennas; spiral ring resonators -- radiation pattern characteristics improvement -- compact coplanar waveguide‐fed multiband monopole antenna -- CPW‐fed multiband monopole antenna -- spiral ring strips -- via‐hole -- multiresonant modes -- worldwide interoperability for microwave access system -- WiMAX system -- spiral ring structure -- figure‐of‐eight pattern -- E‐plane -- omnidirectional pattern -- H‐plane -- peak gain measurement -- frequency 2.5 GHz -- frequency 3.5 GHz -- frequency 5.5 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2012.3980
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A compact coplanar waveguide (CPW)‐fed multi‐band monopole antenna loaded with spiral ring resonators is presented. The proposed antenna consists of two spiral ring strips which are printed on the different sides of the substrate and connected through a via‐hole. The size of the miniaturised antenna is only about 27.5 × 20 × 1 mm 3 . The proposed antenna can excite multi‐resonant modes close to the 2.5/3.5/5.5 GHz bands to meet the specifications of the worldwide interoperability for microwave access (WiMAX) system. By introducing the spiral ring structure, very good radiation pattern characteristics can be obtained. With a figure‐of‐eight pattern in the E‐plane and omnidirectional pattern in the H‐plane, measured peak gains are about 2.0/2.23/2.58 dBi at the 2.5/3.5/5.5 GHz operating bands, respectively.