Phongcharoenpanich, Chuwong

Preferred name

Alternative Name

PHONGCHAROENPANICH, Chuwong

Phongcharoenpanich, C.

Main Affiliation

School of Engineering

chuwong.ph@kmitl.ac.th

Now showing 1 - 10 of 158

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Heuristic UTD solution for antennas near a complex platform
(2019-01-01)
Pimpatang, Awika
;
Lertwiriyaprapa, Titipong
;
Phongcharoenpanich, Chuwong
This paper is aimed at developing an approximate and relatively simple but closed-form uniform geometrical theory of diffraction (UTD) solution for describing the radiated and scattered fields by an antenna near a complex platform consisting of a three-dimensional (3-D) thin material-coated metallic surface, including edges and corners. Unlike the previous works that consider primarily plane wave scattering, the developed solution can also treat radiation/scattering problems of antennas near finite material-coated metallic surfaces which are composed of edges and corners. The developed solution, which is formulated by using a heuristic approach, recovers the proper local plane wave Fresnel reflection coefficient. In addition, the developed UTD-diffracted fields will satisfy the radiation condition, boundary conditions on the conductor. The accuracy of the developed solution is verified by comparing with simulation results from a computer software. It is found that the results from our developed solution agree well with those of references. However, some small discrepancies occur but it is good enough for engineering applications. The proposed solution can be very useful for antenna engineers to design multiple antennas with an electrically large complex material-coated platform.
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Dual-band dual-pattern truncated-corners microstrip antenna for GPS and WiFi applications
(2015-04-22)
Chan-Arpas, Patthareeya
;
Dentri, Sitthichai
;
Phongcharoenpanich, Chuwong
This paper proposes a dual-frequency antenna for vehicles. The antenna structure consists of single patch and single feed. It is operated at the center frequency of GPS system at 1.575 GHz with circular polarization and 2.45 GHz for Wireless Local Area Networks (WLAN) with linear polarization. At 1.575 GHz, S<inf>11</inf>≤-10 dB can cover the frequency from 1.51 to 1.61 GHz. At 2.45 GHz, S<inf>11</inf>≤-10 dB can cover from 2.45 to 2.48 GHz, respectively. The axial ratio bandwidth (AR < 3 dB) is ranged from 1.56 to 1.59 GHz. The measured gains are 4.74 dBic and 2.08 dBi at center frequency, respectively. The half-power beamwidths (HPBW) in xz-and yz-planes are 85 and 85 degrees and the AR beamwidths in xz-and yz-planes are 180 and 200 degrees, respectively.
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Broadband planar dipole array Antenna with double C-shaped slit elements for digital TV broadcasting transmission
(2016-06-01)
Osklang, Pracha
;
Phongcharoenpanich, Chuwong
This research has proposed a planar rectangular dipole antenna enclosed in double C-shaped parasitically slit elements (i.e., radiator element) on a double-cornered reflector for bandwidth enhancement. In the study, simulations were first carried out to determine the optimal parameters of the radiator element and then a radiator element prototype was fabricated and mounted onto a double-cornered aluminum reflector. The simulated and measured |S<inf>11</inf>|<–10 dB of the antenna element covered the frequency ranges of 451–901 MHz (66.6%) and 455–886 MHz (64.3%), respectively. The gain was enhanced by the subsequent deployment of multiple radiator elements to fabricate a four-element vertically array antenna on an elongated double-cornered reflector. The simulated and measured |S<inf>11</inf>|<−10 dB of the array antenna, respectively, covered the 410–991 MHz (82.9%) and 415–886 MHz (72.4%) frequency ranges. The proposed array antenna radiates unidirectionally across the DTV frequency band with a measured front-to-back ratio and cross polarization >20 and <−23 dB, respectively. The simulated and measured half-power beam widths in the E and H planes were respectively 56° ± 13° and 20° ± 6°; and 57° ± 13° and 21° ± 6°. In addition, the simulated and measured gains of the array antenna were 12.8–16.4 dBi and 11.3–15.8 dBi along the 470–862 MHz frequency range. This proposed array antenna is thus suitable for DTV broadcasting transmission. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:466–478, 2016.
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Compact dual-band I-shaped patch antenna with longitudinal strip on inverted-T ground plane
(2014-01-01)
Chawanonphithak, Yuktitath
;
Phongcharoenpanich, Chuwong
This paper presents a compact dual-band I-shaped patch antenna with longitudinal strip on inverted-T ground plane for wireless local area network (WLAN) applications over the frequency band of 2.400-2.484 GHz and 5.150-5.350 GHz. The I-shaped patch antenna and inverted-T ground plane are etched onto a piece of printed circuit board (PCB) with an overall size of 40 mm × 60 mm × 1.6 mm. It is excited by strip line to match impedance with a 50 ω transmission line. The measured results show that the miniaturized antenna achieves a broad operating bandwidth of 2.26-2.89 GHz and 4.92-5.83 GHz for S<inf>11</inf><-10 dB and omnidirectional radiation pattern. The measured gains of the antenna at 2.4 GHz and 5.2 GHz frequencies are 1.90 dBi and 3.45 dBi, respectively. © 2014 IEEE.
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Electromagnetic wave scattering on 2D PEC cylinders using complex source point techniques and uniform geometrical theory of diffraction
(2010-07-30)
Lertwiriyaprapa, T.
;
Phaebua, K.
;
Phongcharoenpanich, C.
;
Krairiksh, M.
An analysis of the path loss in the durian orchard is presented by using the complex source point technique (CSP) and the uniform geometrical theory of diffraction (UTD). The 2D Gaussian beams (GBs) expansion scattered by 2D cylindrical structures are presented. The GB can be generated by using the CSP. The GBs expansion can provides an efficient way of the synthesis of the radiation pattern of the antenna. The cylindrical structures are preliminarily assumed to be a perfect electric conductor (PEC). The source (square patch antenna) is located on a durian. The CST-program uses to simulate the source pattern including the effect of durian for the UTD calculation. The CSP-UTD is applied to analyze the scattered fields from the cylindrical structures. The multi-path propagation and the path loss prediction in various aspects are then obtained. Also, the exact solution of the CSP scattered by a cylindrical is used to compare the UTD results. The good agreements are obtained in this work.
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Effect of antenna frequency bands on the resolution of GPR images
(2017-12-19)
Yochanang, Kiattisak
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Boonpoonga, Akkarat
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Akkaraekthalin, Prayoot
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Bannawat, Lakkhana
;
Phongcharoenpanich, Chuwong
This paper presents an investigation of the effect of the antenna frequency band on the ground penetrating radar (GPR) image resolution. The investigation is achieved through simulations. In the simulations, two Scutcheon antennas are modeled as the receiving and transmitting antennas. A cross-shaped object is buried under the ground constructed with the dielectric material. The Gaussian pulses with different frequency bands is transmitted and propagated to the buried object. The EM wave scattered from the object is collected to form the GPR image. The simulation results obtained from different frequency band show that the resolution of the GPR image obtained from the wider frequency band is better than that of the GPR image obtained from narrower one.
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Realization of switched-beam metamaterial-inspired microstrip antenna
(2017-04-19)
Kawdungta, Supakit
;
Phongcharoenpanich, Chuwong
This research has proposed the enhancement technique of the antenna gain by using a superstrate of metamaterial (MTM). It is deployed with a switchable beam microstrip antenna with double parasitic patches, in which two PIN diodes. Simulations and experimental were carried out for the proposed switchable beam microstrip antenna and the proposed antenna with the superstrate of MTM. The simulation and experimental results are in good agreement and it is a good impedance matching (S<inf>11</inf><-10dB) along the operating frequency (2.4-2.5 GHz). The average measured gain is 7dBi with the unidirectional radiation pattern along the operating frequency. The proposed switchable antennas with and without the superstrate of MTM are operable in the 2.4-2.5GHz WLAN system and switchable in three directions of xy-plane.
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A triangular thin strip on-glass antenna for a DAB automotive application
(2011-11-01)
Phaebua, K.
;
Phongcharoenpanich, C.
;
Torrungrueng, D.
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Surittikul, N.
;
Villarroel, W.
This paper proposes the design of a thin-strip on-glass antenna for a DAB automotive application. The proposed antenna uses a triangular thin-strip monopole as a radiating element, including a ground strip matching technique to obtain an improved impedance matching. The antenna radiation pattern, reflection coefficient [S<inf>11</inf> (dB)], polarization, and absolute gain in the operating frequency band are considered in the design process. It is found that an excellent omnidirectional pattern for vertical polarization, a good S <inf>11</inf> (dB) value, and an absolute gain larger than 0 dBi are achieved within the operating frequency band. © 2011 IEEE.
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Circularly polarized unidirectional antenna using planar tennis shape structure
(2015-10-16)
Phongcharoenpanich, C.
;
Boonying, K.
This paper presents the study and the design of the circularly polarized reader antenna with a tennis ball-shaped radiating plate operating at the universal UHF band (860-960 MHz). The proposed antenna is excited by a capacitively coupled feed technique to enhance S<inf>11</inf>. The tennis ball-shaped radiating plate can be generated a circularly polarized radiation. The simulation is studied effect of the parameters of the proposed antenna for cover the universal UHF RFID band. The prototype antenna is achieved, S<inf>11</inf> cover the frequency between 837.60 to 966.20 MHz, the 3-dB axial ratio (AR) bandwidth cover the frequency from 850.60 to 963.50 MHz, a unidirectional radiation pattern and an average gain 6.18 dBic, respectively.
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Polarization switchable flat antenna for WLAN applications
(2014-01-01)
Phongcharoenpanich, C.
;
Boonying, K.
Polarization switchable flat antenna for WLAN applications operated at the center frequency of 2.45 GHz. The proposed antenna consists of the square flat structure, three switches (six P-I-N diodes), transmission-line phase shifters of 0 and 90 degrees. The antenna can be switched between 5 different states: vertical, horizontal and slant polarizations for linear polarization (LP), left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) by controlling the DC bias of 5 V and the current of 16 mA for the P-I-N diodes. The simulated and measured results show that the proposed antenna can cover the impedance bandwidth from 2.400 GHz to 2.484 GHz and good axial ratio for the circular polarization.

Phongcharoenpanich, Chuwong

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