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A dual-band rectangular shape incorporated into circular patch antenna for 2.4/5 GHz wireless local area network applications
(2025-02-01)
Lamultree, Suthasinee
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Somsanook, Nattakarn
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Narkkoht, Wararak
;
Phongcharoenpanich, Chuwong
This research exhibits a design of a dual-band patch antenna (DBPA) implemented by a rectangular shape incorporated into a circular patch together with a pair of half-wavelength inverted U-slots (HWIUSs) with the single feed for 2.4/5 GHz wireless local area network (WLAN) applications. For this work, the HWIUSs are key in designing a dual-band antenna. The DBPA is fed by a 50-Ohm microstrip line, printed on a copper layer overlaid on an FR4 substrate with a relative permittivity of 4.3 and height of 1.6 mm, while the bottom layer is backed by a partial ground plane. An antenna prototype with a dimension of 0.384λL×0.304λL×0.013λL was contrived and admeasured to verify the simulation. The measurement provides a nearly omnidirectional pattern with a 2.55 and 3.3 dBi peak gain covering a dual-band 10 dB return loss bandwidth of 15% (2.4–2.8 GHz) and 20% (4.96–5.86 GHz), respectively. Noticeably, simulated |S11| and radiation patterns are reasonable following experimental results showing its potential in 2.4/5 GHz WLAN services.
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DESIGN OF A COMPACT WIDEBAND BI-DIRECTIONAL PATTERN ANTENNA FOR 5G APPLICATIONS
(2023-07-27)
Lamultree, Suthasinee
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Srisukhot, Supada
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Saetiaw, Charinsak
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Nuangwongsa, Kanawat
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Phongcharoenpanich, Chuwong
In this research, a wideband bi-directional pattern antenna implemented by a circular monopole encircled with an en-forced-radiation circular ring incorporated with inversed L-shaped stub is designed to operate over the mid-band of 5G applications ranging from 2 to 6 GHz. It is contrived of a copper overlaid on FR4 substrate with relative permittivity of 4.3 and height of 1.6 mm. This proposed antenna is fed by a 50-ohm coplanar waveguide, which is printed on the same side of the radiated circular monopole. To further enrich the impedance matching, a pair of etched slots is added-on the ground plane near the fed line to reduce the return loss. In the study, the initial parameters are theoretically worked out, and then simulation is then performed by using an electromag-netic solutions tool to numerically discover the set of solution parameters. From the simulation results, this proposed antenna offers the |S<inf>11</inf>| < –10 dB covered the operating frequency running from 1.79 to over 8 GHz with fractional bandwidth 126.90 % and 1.74 to 7.07 GHz with fractional bandwidth 101.04 % for the simulation excluded and included SMA, respectively. It provides a linear polarization with total efficiency better than 81.5 %. After that, an antenna prototype with compact dimensions of 45×45×0.6 mm<sup>3</sup> was fabricated and testified to validate the simulation results. The measurement results provide a stability bi-directional pattern with peak gain of 5.54 dBi covering a 10 dB return loss bandwidth of 118.5 % (1.93–7.54 GHz). Simulated |S<inf>11</inf>|, 2D radiation pattern and gain are reasonably in good agreement with experimental results. Furthermore, this proposed antenna is compared with the current compact, wideband and 5G antenna to indicate its prospective for the interested bands.
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Tri-Band Bidirectional Antenna for 2.4/5 GHz WLAN and Ku-Band Applications
(2022-06-01)
Lamultree, Suthasinee
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Thanamalapong, Wutthipong
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Dentri, Sitthichai
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Phongcharoenpanich, Chuwong
A compact tri-band, low profile, and lightweight antenna is proposed for 2.4/5 GHz WLAN and Ku-band applications. The antenna geometry was a radiating rectangular patch surrounded by a wide circular slot with an inverted-L strip connected to one side of the slot. It was mounted on a copper layer of a single side FR4 substrate with a dielectric constant of 4.3 and a height of 1.6 mm. It was fed by a 50-Ω coplanar waveguide. This design was very compact (40 × 40 × 1.6 mm<sup>3</sup>). Simulated and actual measurements of an antenna setup in the laboratory verified that the antenna’s bidirectional radiation pattern completely covered the three transmission bands: 2.4–2.485 GHz, 5.15–5.825 GHz and 13.4–17.7 GHz with less than 10-dB return loss and maximum gains of 2.35 dBi, 4.41 dBi and 4.71 dBi, respectively. Wireless communication for the self-navigated vehicle, for one example, is fully supported by this single antenna.
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Design of Wideband Circular Patch with Symmetric Strips Antenna for 5G Applications
(2021-03-10)
Srisukhot, Supada
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Thanamalapong, Wutthipong
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Phongcharoenpanich, Chuwong
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Lamultree, Suthasinee
In this research, a circular patch antenna encircled by wide-circular-slot incorporated with symmetric strips is designed to operate over the middle-band of 5G applications. This proposed antenna is constructed of a copper and glazed on FR4 substrate with ?r of 4.3 and height of 1.6 mm. It is fed by a 50-ohms coplanar waveguide, which printed on a same side of the radiating circular patch. Obviously, it exhibits a bidirectional pattern with 10 dB return loss, minimum and maximum gains of 1.76 dBi, and 5.64 dBi, respectively covered 2-6 GHz. All appropriated parameters have been carried out by using an electromagnetic simulation tool. To evaluate its suitability in 5G applications, numerical results will be investigated and analyzed.
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An ultra-wideband rectangular monopole with circular ring antenna for wireless communication applications
(2021-01-01)
Lamultree, Suthasinee
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Thachantheuk, Udomchok
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Krasinhom, Kobchai
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Phongcharoenpanich, Chuwong
An investigation of an ultra-wideband rectangular monopole with circular ring antenna for wireless communication systems is reported. The antenna is designed, simulated, invented, and tested experimentally. It operates over frequency range of 2.56-13 GHz with a return loss of 10 dB. The dimensions of designed antenna is 40 mm × 40 mm with an electrical size of 0.34λ× 0.34λ at 2.56 GHz frequency. It is fed by a 50-Ohm coplanar waveguide and printed on a single side FR-4 substrate with a relative permittivity of 4.3 and a thickness of 1.6 mm. This designed antenna exhibits bidirectional radiation patterns over the entire impedance bandwidth with more than 2.8 dB peak gain for the entire frequency range. The simulation results are reasonably in good agreement with the experimental results.
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Investigation of 3.1-10.6 GHz circular monopole antenna with modified partial ground plane
(2020-01-01)
Lamultree, Suthasinee
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Jansri, Chalee
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Phongcharoenpanich, Chuwong
A circular monopole antenna with modified partial ground plane for ultra wideband (UWB) applications is investigated in this paper. The proposed antenna is fed by a 50 Ω tapered microstrip line, and printed on a FR4 substrate with relative permittivity of 4.3 and height of 1.6 mm. All optimal parameters have been achieved to accomplish S<inf>11</inf> better than -10 dB with a nearly omnidirectional pattern and maximum gain of 3.83 dBi over 3.1-10.6 GHz. In addition, antenna prototype was fabricated and conducted experiment to verify the simulation. Apparently, simulated results are in very good agreement with the experimental results.
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Theoretical investigation of a parabolic reflector illuminated by a probe-fed rectangular waveguide with coupling apertures
(2020-01-01)
Lamultree, Suthasinee
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Panthasa, Rut
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Phongcharoenpanich, Chuwong
In this study, a design of high gain reflector antenna for point to point communications is reported. A probe-fed waveguide aperture with four-stacked-coupling aperture is employed to be a primary illuminated parabolic reflector antenna. By varying distance between the primary and secondary antennas, its gain can be raised. An EM simulator has been used in the process. It is found that this proposed antenna provides an excellent symmetrical sharp beam with a low side lobe level as well as low cross-polarization. In addition, this proposed antenna produces a high gain of 26.9 dBi with S<inf>11</inf> < -15 dB from 0.88f<inf>c</inf> to 1.06f<inf>c</inf>. All simulation results are reported and discussed in the paper.
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A compact dual-band circular monopole antenna with partial ground plane for 2.45/5.5 GHz WLAN applications
(2019-03-01)
Lamultree, Suthasinee
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Jansri, Chalee
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Phongcharoenpanich, Chuwong
In this paper, a compact dual-band antenna for 2.45/5.5 GHz WLAN applications is presented. Geometry of a presented antenna consists of a circular-slot printed on a circular monopole with a partial ground plane, operated at 2.45 GHz and 5.5 GHz bands, respectively. It is constructed by using FR-4 substrates with ϵ<inf>r</inf> of 43 and 0.035 mm copper layer thickness. This antenna is compact with a size of 70 mm×80 mm×1.6 mm, and it is capable to easily integrate with other circuits. It is shown that this proposed antenna wholly covers the required bandwidths ranging from 2.4-2.485 GHz and 5.15-5.825 GHz with desirable radiation characteristics and magnitude of S<inf>11</inf> better than -10dB. To verify the simulation, an antenna prototype was made up and measured. Obviously, the simulation results are in well acceptance with the measured one.
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Gain improvement of dual-band circular monopole antenna for 2.45/5.5 GHz WLAN applications
(2019-01-01)
Lamultree, Suthasinee
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Jansri, Chalee
;
Phongcharoenpanich, Chuwong
This paper presents a gain improvement of dual-band antenna for 2.45/5.5 GHz WLAN applications. The radiating element of the proposed antenna consists of a circular disc monopole with circular-slot laid on FR-4 substrate and backed by a partial ground plane. This partial ground plane is modified to improve its radiation performance. This proposed antenna operates over the frequencies of 2.4-2.485 GHz and 5.15-5.825 GHz with nice radiation characteristics and magnitude of S11 better than -10 dB. An EM simulator has been used in the design and simulation. In addition, an experimental validation was set and measured to compare with the simulated results. All numerical results will be reported and discussed in the paper.
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Design and measurement of a probe-fed open-ended rectangular waveguide with four-stacked-coupling-aperture
(2019-01-01)
Lamultree, Suthasinee
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Panthasa, Rut
;
Phongcharoenpanich, Chuwong
This paper presents a design and measurement of symmetric bidirectional pattern antenna implemented by using a probe-fed open-ended rectangular waveguide (OERW) vertically attached with four-stacked-coupling-aperture (FSCA). For the OERW without FSCA, it provides asymmetric beam in forwards and backwards directions. With the effect of FSCA, that asymmetry is amended to be symmetry, and propagates the WLAN frequency band of 2.4–2.5 GHz with the return loss better than 10 dB, and maximum gain of 7.04 dBi. A prototype antenna was fabricated and measured. Obviously, the preliminary measured results are very reassuring, and reasonably in good agreement with simulation results.

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