Dual-band elliptical wide-slot antenna with high BDR for portable wireless applications. Issue 3 (4th March 2021)

• Record Type: Journal Article
• Authors: Kumar, Munish; Nath, Vandana
• Is Part Of: International journal of electronics. Volume 108:Issue 3(2021)
• Page Start: 442
• Page End: 461
• Publication Date: 2021-03-04
• Subjects: Microstrip-line-fed -- elliptical wide-slot -- WLAN -- WiMAX -- bandwidth dimension ratio (BDR); Electronics -- Periodicals; Electronic control -- Periodicals; 621.381
• DOI: 10.1080/00207217.2020.1818295
• Languages: English
• ISSNs: 0020-7217

Abstract

ABSTRACT: This paper presents a highly compact dual-band elliptical wide-slot (EWS) antenna with high bandwidth dimension ratio (BDR) having one inverted L -slot for WLAN and WiMAX applications. Initially, the broadband characteristic of 4.4–9.3 GHz is obtained by using an EWS in the ground plane. To include 3.5 GHz WiMAX wireless standard, a parasitic elliptical patch is embedded in the centre of the elliptical wide-slot. With an increase in semi-major axis length of the parasitic patch, the overlapping capacitance between the microstrip-line and the parasitic patch increases, thereby showing a broadband characteristic ranging from 3.59 to 7.08 GHz and BDR of 1423. An inverted L -shaped slot is etched in the ground plane to generate a frequency band around 2.4 GHz, integrating the 2.4 GHz WLAN and 2.5 GHz WiMAX wireless standards. The measured 10 dB return loss bandwidth due to mirrored L -shaped slot is 440 MHz (2.34–2.78 GHz) with BDR of 923. As a result, the EWS with parasitic patch and mirrored L -shaped slot together gives an overall size of 0.132 λ L × 0.14 λ L where λ L is the lowest free-space wavelength corresponding to the operating frequency of 2.34 GHz. The measured peak gain of lower and upper-frequency bands is 6.95 and 6.82 dB.