• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.11
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• pp.1245-1250
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• 2015

In this paper, a compact CPW-fed antenna for 2.45 GHz band WLAN applications is presented. The proposed antenna which has a geometry of folded stub and slot is fabricated into an inexpensive FR-4 substrate that has a dielectric constant of 4.2 and a thickness of 1.0 mm with optimized parameters obtained by simulation, and then measured. From measured result, we confirmed available operation as antenna for WLAN applications by obtaining the return loss level of < -10 dB in the frequency band of 2.4-2.484 GHz.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2000.11a
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• pp.559-562
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• 2000

In this paper, coplanar waveguide fed antennas (CPWFAs) insetting two slits to boundary of the square microstrip patch are presented. These slits play roles in not only lowering a resonant frequency but also fine-tuning for the proposed antenna together with open stub of CPW feed line. The CPWFAs were designed and manufactured using microwave dielectrics (Al,Mg)TaO$_2$ having high dielectric-constant ($\varepsilon$r=20). The return loss and input impedance of the CPWFAs were investigated in terms of the slit length and open stub length of CPW feed line. It is shown that a resonant frequency decreases as the slit length increases.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.21 no.2
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• pp.218-223
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• 2010

In this paper, a novel CPW(Coplanar Waveguide)-fed UWB(Ultra Wide Band) antenna is designed, implemented, and measured for UWB communications. CPW-fed planar antenna has advantages of wide-bandwidth, low-cost and easy interaction with radio frequency front end circuitry. We have used HFSS(High Frequency Structure Simulator) of Ansoft which is based on the FEM(Finite Element Method) to simulate the proposed antenna. FR-4 substrate of thickness 1.6 mm and relative permitivity 4.4 is used for implementation. The proposed antenna showed VSWR(Voltage Standarding Wave Ratio)${\leq}2$ for the frequency band from 3.1 GHz to 10.6 GHz which is used for ultra wide band communication. Measured peak gains are 2.61, 4.95, 2.89, 7.35 dBi at 3, 6, 8, 11 GHz, respectively.

• Journal of electromagnetic engineering and science
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• v.10 no.1
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• pp.13-17
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• 2010

In this paper, we have described a simple CPW-fed UWB antenna for wireless UWB communication. The proposed antenna consists of two symmetrical strips having two steps and CPW feeding. Two techniques(symmetrical structure, two steps) are used to produce good low-dispersion and impedance matching. The proposed UWB antenna has an omni directional radiation pattern, compact size, low dispersion, and low cost.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2002.11a
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• pp.215-218
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• 2002

In this paper, a dual-frequency printed slot antenna loaded with an open-ring conducting strip and capacitively fed by a coplanar waveguide(CPW) is designed. The designed antenna has a bandwidth of 240㎒(1690㎒-1930㎒) at PCS frequency band and of 160㎒(2380㎒-2540㎒) at WLAN frequency band. In both frequency ranges, pattern and gain requirements are satisfied. The commercial software, IE3D, was used to design slot antenna. The predicted characteristics along with measured data are presented for verification purpose.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.7
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• pp.663-668
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• 2003

In this paper, a CPW fed slot antenna with novel broadband feed structure is presented. To enhance the impedance bandwidth of the slot antenna we proposed the broadband feed structure of new bow-tie slot which is combined with four λ/2 rectangular radiation slot and inductively coupled. The measured 10 dB impedance bandwidth is about 60 %(5.2∼9.4 GHz) and the simulated antenna gain is about 6 dBi at 7.36 GHz.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.4
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• pp.765-771
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• 2015

In this paper, a dual-band arc-shaped monopole antenna for WLAN(Wireless Local Area Networks) applications. The proposed antenna is based on CPW-fed structure, and composed of two-arc shaped of radiating patch and ground plane. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator (HFSS) and found the parameters that greatly effect antenna characteristics. Using optimal parameters, the antenna is fabricated. The numerical and experiment results demonstrated that the propnosed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN bands. And measured results of gain and radiation patterns characteristics displayed determined for opeating bands.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.61 no.3
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• pp.149-152
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• 2012

In this paper, a wideband monopole antenna with ring loop by modified ground plane is presented. The proposed antenna consist of monopole antenna, ring loop by ground plane. This antenna is fed CPW-fed and wide slot antenna of a novel structure for broadband characteristics is proposed. To enhance the impedance bandwidth of the wide slot antenna, we proposed the wide slot structure with CPW-fed which is combined with four ${\lambda}/2$ rectangular radiation modified monopole and inductively coupled. The measured impedance bandwidth is about 2.5 GHz(3.65~6.15 GHz) then less -10 dB.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.11
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• pp.107-115
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• 2005

This paper presents the structure of a broadband coplanar waveguide(CPW) fed square slot antenna with a impedance bandwidth tuning patch. The designing method of the antenna suggests that two resonant frequencies are excited as a dual-frequency dipole antenna following the dimensions of the square slot. In other words, the lower resonant frequency mainly depends on the slot width and the higher one its length. A CPW fed square slot antenna with a impedance tuning patch was measured to $20GHz^\~33GHz$, $50\%$, VSWR=2 impedance bandwidth by adjusting the dimensions of the tuning patch when the slot length had $70\%$ of its width. This result shows that a medical CPW fed antenna is easily implemented with a simple square slot structure including a bandwidth tuning patch in the center.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.4
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• pp.441-448
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• 2015

In this paper, a CPW-fed dual-band monopole antenna with two branch strips for WLAN(Wireless Local Area Networks) applications was designed, fabricated and measured. The proposed antenna is based on a CPW-feeding structure, and composed of two branch strips and then designed and tuned the length of two branch lines to obtained required frequencies bands. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and carried out simulation about parameters $L_5$, $L_8$, $W_3$, $W_5$, $W_9$. The proposed antenna is fabricated on the FR-4 substrate using the obtained parameters. The numerical and experiment results demonstrated that the proposed antenna obtained the -10 dB impedance bandwidth 1,095 MHz (1.57~2.665 GHz) for 2.4 GHz band and 1,680 MHz (4.99~6.67 GHz) for 5 GHz band satisfied requirement while simultaneously covering the WLAN bands. And characteristics of gain and radiation patterns are determined for WLAN operating bands.