Bandwidth Enhancement of Low-Profile Slot Antennas using Theory of Characteristic Modes

2021 ◽  
pp. 153868
Author(s):  
P. Sumithra ◽  
D. Kannadassan
Keyword(s):  
Slot Antennas ◽  
Bandwidth Enhancement ◽  
Low Profile ◽  
Characteristic Modes

scholarly journals BANDWIDTH ENHANCEMENT OF MICROSTRIP LINE AND CPW-FED ASYMMETRICAL SLOT ANTENNAS

2012 ◽  
Vol 32 ◽  
pp. 69-79 ◽  
Author(s):  
Debasis Mitra ◽  
Dhruba Das ◽  
Sekhar Ranjan Bhadra Chaudhuri
Keyword(s):  
Microstrip Line ◽  
Slot Antennas ◽  
Bandwidth Enhancement

Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards

Circuit World ◽  
2017 ◽  
Vol 43 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Partibane B. ◽  
Gulam Nabi Alsath M. ◽  
Kalidoss Rajakani
Keyword(s):  
Loop Antenna ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Slot Antennas ◽  
Content Type ◽  
Bandwidth Enhancement ◽  
Microstrip Patch ◽  
Resonant Modes ◽  
Patch Load ◽  
Patch Loading

Purpose This paper aims to presents the bandwidth enhancement of a hybrid slot–loop antenna using a modified feed structure. Design/methodology/approach The conventional monopole feed of the hybrid slot–loop radiator is loaded with a flat microstrip patch to excite higher-order modes. The proposed antenna combines the resonant modes of the slot antenna, the loop antenna and the patch loading. Findings The antenna exhibits a dual-band response suitable for GSM 1800/1900 and ultrawideband (UWB) standards. The impedance bandwidth extends from 1.65 to 1.95 GHz (11.42 per cent) and 3 to 11.1 GHz (114.9 per cent). The proposed antenna has the smallest footprint with a peak gain of 5.07 dBi at 1.8 GHz and 4.97 dBi at 6 GHz. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The performance of the bandwidth-enhanced hybrid slot–loop antenna is compared with that of other slot antennas. Originality/value Thus, a hybrid slot–loop antenna with an enhanced bandwidth has been reported in this study. The conventional monopole feed of the antenna is replaced with a monopole ending with a microstrip patch load. The antenna covers the operating bands of GSM 1800/1900 and UWB. The proposed antenna has a smaller footprint compared with other wide-slot antennas reported in the literature.

Bandwidth enhancement of compact patch antennas by loading inverted “L” and “T” strips

2020 ◽  
pp. 1-8
Author(s):  
Abdelheq Boukarkar ◽  
Rachdi Satouh
Keyword(s):  
Patch Antenna ◽  
Resonant Mode ◽  
Patch Antennas ◽  
Bandwidth Enhancement ◽  
Wireless Applications ◽  
Low Profile ◽  
Resonant Modes ◽  
Relative Bandwidth ◽  
Operating Bandwidth ◽  
Patch Edge

Abstract We propose simple designs of compact patch antennas with bandwidth enhancement. Firstly, an inverted “L” strip is loaded onto the corner of one radiating patch edge to create an additional resonant mode which can be combined with that one of the conventional patch to enhance the operating bandwidth. Secondly, the “L” strip is replaced by inverted “T” strip to improve further the bandwidth by creating two adjustable resonant modes. The two proposed patch antennas have the particularity of enhancing the bandwidth significantly without increasing their profile and their overall sizes. Two antenna prototypes are fabricated and tested. Measurements reveal that the patch antenna loaded with “L” strip has stable radiation characteristics with 5.2 times enhancement in the relative bandwidth compared with a conventional patch antenna. The antenna loaded with inverted “T” strip has wider bandwidth (6.25 times wider than the conventional patch) and covers the operating band 5.07–5.89 GHz (15%) with measured peak gain and peak efficiency of 6.25 dBi and 78%, respectively. The proposed antennas are easy to fabricate, have a low-profile, and exhibit good performances which make them good candidates to use in real wireless applications.

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