Compact dual polarised V slit, stub and slot embedded circular patch antenna for UMTS/WiMAX/WLAN applications

• Published in: Electronics letters Vol. 52; no. 17; pp. 1425 - 1426
• Main Authors: Mathew, S, Ameen, M, Jayakrishnan, M.P, Mohanan, P, Vasudevan, K
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 18.08.2016
• Subjects: 3G mobile communication; antenna feeds; antenna radiation patterns; Antennas and propagation; Boundaries; Circularity; compact dual polarised slot embedded circular patch antenna; compact dual polarised stub embedded circular patch antenna; compact dual polarised V slit embedded circular patch antenna; frequency 2 GHz; frequency 3.5 GHz; frequency 5.6 GHz; impedance bandwidths; Interoperability; Local area networks; microstrip antennas; multifrequency antennas; Patch antennas; patch size reduction; radiation pattern; single probe‐fed novel slot embedded circular microstrip antenna; single probe‐fed novel stub embedded circular microstrip antenna; single probe‐fed novel V slit embedded circular microstrip antenna; Slits; slot antennas; UHF antennas; UMTS application; WiMax; WiMAX application; Wireless communication; wireless LAN; Wireless networks; WLAN application; UMTS application; compact dual polarised slot embedded circular patch antenna; WiMAX application; impedance bandwidths; frequency 2 GHz; 3G mobile communication; WiMax; single probe-fed novel stub embedded circular microstrip antenna; microstrip antennas; compact dual polarised V slit embedded circular patch antenna; slot antennas; single probe-fed novel slot embedded circular microstrip antenna; antenna radiation patterns; compact dual polarised stub embedded circular patch antenna; radiation pattern; UHF antennas; WLAN application; single probe-fed novel V slit embedded circular microstrip antenna; multifrequency antennas; antenna feeds; patch size reduction; wireless LAN; frequency 3.5 GHz; frequency 5.6 GHz
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2016.1996

A single probe-fed novel V slit, stub and slot embedded circular microstrip antenna with resonances in the three bands of UMTS, worldwide interoperability for microwave access (WiMAX) and WLAN is presented. The polarisation is circular in the UMTS band and linear in the other two bands. Asymmetrical V slits in the patch boundary along with an embedded circular slot in the patch centre are employed to introduce the perturbation necessary for circular polarisation. Impedance bandwidths (BWs) of 4.2, 2 and 6.2%, respectively, in the three bands centred at 2, 3.5 and 5.6 GHz are obtained. The axial ratio BW is 2.3% in the UMTS band. Moderate gains of 4.4, 3.5 and 2.8 dBi are obtained in the three bands. There is a patch size reduction of about 48% when compared with the conventional circular patch antenna at a fixed operating frequency. The radiation pattern is directional in the WiMAX band and nearly omnidirectional in the WLAN band.