Coupled‐sectorial‐loop antenna with circular sectors for super wideband applications

Yeo, Junho; Lee, Jong-Ig

doi:10.1002/mop.28416

Cited by 33 publications

(31 citation statements)

References 7 publications

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“…The SWB antennas have been reported in Refs. to overcome these issues of low‐frequency BW, BDR, fractional BW, and less electrical dimensions. The major problem in the design of such SWB antennas is the compactness with the extremely wideband operation.…”

Section: Introductionmentioning

confidence: 99%

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Compact design of trapezoid shape monopole antenna for SWB application

Rahman

Cao

Ullah

et al. 2019

Micro & Optical Tech Letters

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In this article, a compact design of the monopole antenna is proposed for the super‐wideband application (SWB). The extremely wide frequency bandwidth is achieved by deploying a topology based on trapezoid shape radiator, triangular tapered feed line, and semicircular ground. The antenna shows resonance from 1.42 GHz to more than 90 GHz with a bandwidth ratio of 63.30:1, VSWR ≤2 and with S11 ≤ −10 dB. The electrical dimension of the monopole antenna is 0.16λc × 0.27λc where the wavelength λc is with respect to the lowest cut‐off frequency. The designed monopole antenna is fabricated on the F4B substrate. The prototype is experimentally validated for ultrawideband and SWB application. The experimental and simulated results are in good agreement and the designed antenna shows better performance of a wideband operation, compact electrical dimension, and high bandwidth dimension ratio over existing reported structures. The proposed antenna can be used for multiple bands such are ISM, Wi‐Fi, WLAN, WiMAX, C, S, X, K, and Ku bands.

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Section: Introductionmentioning

confidence: 99%

“…Similarly, the same issues of larger electrical dimension, less frequency bandwidth or less BW ratio were found in Refs. .…”

Section: Introductionmentioning

confidence: 99%

Compact design of trapezoid shape monopole antenna for SWB application

Rahman

Cao

Ullah

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Presently, several researches are going on super wideband antennas in terms of lesser electrical dimensions and high bandwidth dimension ratio . A monopole antenna for SWB applications has been proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Yeo and Lee proposed dual sectorial loop radiator which is electromagnetically coupled and provides super wide bandwidth (1–19.4 GHz). This radiator has very good impedance bandwidth but due to larger electrical dimensions, it suffers from smaller BDR value (890.83) . Hakimi et al proposed CPW‐fed transparent antenna for extended ultra‐wideband applications with lesser BDR value .…”

Section: Introductionmentioning

confidence: 99%

Circular base loaded modified rectangular monopole radiator for super wideband application

Okas

Sharma

Gangwar

2017

Micro & Optical Tech Letters

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This letter investigates a circular base loaded modified rectangular monopole radiator. Two main aims of presented research article are: (a) to achieve super wide bandwidth with the help of circular base loaded rectangular monopole, tapered microstrip line feed and elliptical ground plane; (b) to increase bandwidth dimension ratio (BDR) with the help of modification in rectangular monopole. To authenticate the proposed radiator, prototype has been fabricated and measured. Experimental outcome shows that the proposed radiator operates over the frequency range from 0.96 to 13.98 GHz (VSWR < 2) with a bandwidth ratio of 14.56:1 and having fractional bandwidth of 174.29%. Bandwidth dimension ratio for proposed radiator is 7468.51. Time domain analysis has also been performed to support the applicability of proposed radiator in super wideband applications.

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“…The circular sectors are used as a wideband balun or transition to connect a 75-Ω MS line and the square loop [8]. Note that a 75-Ω line is used instead of 50 Ω as the reference impedance for the feed, because a 75-Ω coaxial cable is used for TV broadcast applications.…”

Section: Introductionmentioning

confidence: 99%

Compact Microstrip-Fed Square Loop Antenna for DTV Applications

Yeo¹,

Lee²

2016

Journal of information and communication convergence engineerin

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A design method for a compact square loop antenna fed by a microstrip (MS) line for indoor digital television (DTV) applications is proposed. The proposed antenna consists of a square loop, circular sectors, and an MS line. The square loop combined with circular sectors is printed on one side of a substrate, and a 75-Ω MS line is printed on the other side. The circular sectors are used as a wideband balun or transition to connect the MS line and the square loop. A prototype of the proposed square loop antenna operating in the DTV band (470-806 MHz) is designed and fabricated on an FR4 substrate. Experimental results show that the proposed antenna has the desired impedance characteristics in the frequency band of 464-1,220 MHz (89.8%) for a voltage standing wave ratio (VSWR) of <2 covering the DTV band, and a broadside gain of 0.8-3.3 dBi in the DTV band. developed [7]. For the planar tapered-loop antenna, a PCBtype balun was used for transforming the high input impedance of the loop, making antenna fabrication more complicated. Therefore, a loop antenna with a simple integrated balun or transition needs to be developed.In this paper, a design method for a microstrip (MS)-fed compact square loop antenna with circular sectors for indoor DTV applications is presented. The circular sectors are used as a wideband balun or transition to connect a 75-Ω MS line and the square loop [8]. Note that a 75-Ω line is used instead of 50 Ω as the reference impedance for the feed, because a 75-Ω coaxial cable is used for TV broadcast applications. The antenna size is reduced using a square loop instead of a circular one and the slits introduced at the four corners of the loop. A prototype of the proposed antenna was fabricated on an FR4 substrate, and its measured performance was compared with the simulation results. The results in this work were obtained using a CST Microwave Studio and were validated by a measurement of the input voltage standing wave ratio (VSWR), gain, and the radiation patterns tested in an anechoic chamber. II. ANTENNA GEOMETRY AND DESIGNThe geometry of the proposed compact square loop antenna fed by an MS line is presented in Fig. 1. It consists of a square loop with circular sectors and an MS feed line. A square loop combined with circular sectors is printed on one side of a substrate, and an MS line is printed on the other side. The end of the MS line is connected to the upper circular sector by using a via. Since the width of the 75-Ω MS line is very narrow and is similar to the diameter of the via, a circular patch with a diameter much larger than the MS line width is printed on the end of the MS line in order to connect the MS line and the via securely. The two circular sectors are used as a wideband transition to connect the 75-Ω MS line and the square loop.To reduce the antenna size, the square loop is used instead of a circular loop, and four edge slits are appended at the corners where the square loop and the circular sectors come into contact with each other in order to further reduce th...

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Coupled‐sectorial‐loop antenna with circular sectors for super wideband applications

Cited by 33 publications

References 7 publications

Compact design of trapezoid shape monopole antenna for SWB application

Compact design of trapezoid shape monopole antenna for SWB application

Circular base loaded modified rectangular monopole radiator for super wideband application

Compact Microstrip-Fed Square Loop Antenna for DTV Applications

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