• Title, Summary, Keyword: Notched WLAN band

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A Design of a Planar UWB Antenna with Notched WLAN band by Using Slot and Slit (슬롯과 슬릿을 사용하여 무선랜 대역이 제거된 평면형 UWB안테나 설계)

  • Lee, Chang-Joo;Kim, Su-Hoon;Park, Young-Bon;Lee, Mun-Soo
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.6
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    • pp.105-110
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    • 2012
  • In this paper, A planar UWB antenna with notched WLAN band, 802.11a band (5.15 ~ 5.825GHz), by using slot and slit is designed by using CST Microwave Studio. The notched bandwidth can be controlled by the length and width of the slot and slit in the patch and ground plane and it's radiation characteristics are examined through the experiments. The bandwidth based on the -10dB return loss level can be covered the full UWB band (3.1 ~ 10.6GHz) with a notched WLAN band (5.147 ~ 5.83GHz). Also, the experimental radiation pattern is almost omnidirectional in the H-plane.

A design and manufacture of CPW-Fed UWB antenna with notched WLAN band by using a U shaped slot (U자형 슬롯을 사용하여 WLAN 대역이 제거된 CPW 급전 방식을 갖는 UWB 안테나 설계 및 제작)

  • Ha, Yun-Sang;Kim, Gi-Rae;Yun, Joong-Han
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.11
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    • pp.2518-2525
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    • 2015
  • In this paper, we propose a UWB(Ultra Wide Band) antenna with CPW(Coplanar Waveguide) structure notched the 802.11a(5.15 ~ 5.825 GHz) band by using the U shaped slot. The proposed antenna not only shows Ultra-Wideband characteristic(3.1 ~ 10.6 GHz) suitable for UWB communications but has partially notched-band characteristic to reject 5 GHz WLAN band(5.15 ~ 5.825 GHz). The antenna is designed on an FR-4 substrate of which the dielectric constant is 4.4, and its overall size is $30mm(W){\times}20mm(L){\times}1mm(t)$. Fabricated antenna satisfied $VSWR{\leq}2$ in 3.1 ~ 10.6 GHz except for the band rejection of 5.15 ~ 5.825 GHz. And measured results of gain and radiation patterns characteristics displayed determined for operating bands.

The Design of Ultra-Wide Band(UWB) Band Pass Filter with WLAN Notched Band of DGS(Defected Ground Structure)-Type (DGS형 무선 랜 차단대역을 포함하는 UWB(Ultra-Wide Band) 대역통과 여파기 설계)

  • Kim, Kab-Ki
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.11
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    • pp.1909-1913
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    • 2008
  • In this paper, A compact ultra-wideband(UWB) bandpass filter(BPF) with WLAN notched filter has been proposed. H-shared slot is studied and adopted to tighten the coupling of inter-digital capacitor in order to improve the BPF's performance. Three pairs of tapered defected ground structures(DGS) are formed to assign their transmission zeros towards the out of band signal, thereby suppressing the spurious passband. Also Meander line slot is de#eloped to reject the undesired wireless local-area network(WLAN) radio signals. That's combining these three structures we obtain a small sized UWB BPF.

The Design of Ultra-Wide Band(UWB) Band Pass Filler with WLAN Notched Band Using Defected Ground Structure (결함 기저면 구조를 이용한 무선 랜 차단대역을 포함하는 Ultra-Wide Band(UWB) 대역통과 필터 설계)

  • Park, Chang-Hyun;Jo, Sung-Sik;Park, Jung-Ah;Kim, Kab-Ki
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.299-302
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    • 2008
  • In this paper, A compact ultra-wideband(UWB) bandpass filter(BPF) with WLAN notched filter has been proposed. H-shaped slot is studied and adopted to tighten the coupling of inter-digital capacitor in order to improve the BPF's performance. Three pairs of tapered defected ground structures(DGS) are formed to assign their transmission zeros towards the out of band signal, thereby suppressing the spurious passband. Also Meander line slot is developed to reject the undesired wireless local-area network(WLAN) radio signals. That's combining these three structures we obtain a small sized UWB BPF.

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Design of CPW-Fed Broadband Antenna Using the CSRR for WLAN Band Notched Characteristic (CSRR을 이용한 WLAN 대역 저지 특성 CPW 급전 광대역 안테나 설계)

  • Kim, Jang-Yeol;Lee, Seung-Woo;Kim, Nam;Oh, Byoung-Cheol
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.22 no.5
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    • pp.528-537
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    • 2011
  • In this paper, a broadband antenna of the CPW structure with a band-notched characteristic is presented. To obtain this characteristic, the complementary split ring resonator(CSRR) is inserted in the ground plane. In addition, the IEEE 802.11a WLAN band(5.15~5.825 GHz) appears in the band-notched characteristic. The proposed antenna dimension is $36{\times}60{\times}1.6\;mm^3$, and it is designed on the FR-4 substrate having a relative dielectric constant of 4.4. The designed antenna shows that the resonant frequency is 2.03~10.78 GHz below the return loss of -10 dB and a VSWR less than 2 was satisfied. As a result, the proposed CSRR has a band-notched characteristic in the range of 4.917~6.017 GHz which the center frequency is about 5.4 GHz band.

Controllable Band-Notched Slot Antenna for UWB Communication Systems

  • Kueathaweekun, Weerathep;Anantrasirichai, Noppin;Benjangkaprasert, Chawalit;Nakasuwan, Jintana;Wakabayashi, Toshio
    • ETRI Journal
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    • v.34 no.5
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    • pp.674-683
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    • 2012
  • We propose a slot antenna consisting of a rectangular slot on the ground plane, fed by a microstrip line with a rectangular-ring-shaped tuning stub that can be deployed in ultra-wideband (UWB) communication systems to avoid interference with wireless local area network (WLAN) communication. Our antenna can achieve a single band-notched property from the 5 GHz frequency to the 6 GHz frequency owing to a controllable band notch that uses L- and J-shaped parasitic elements. The antenna characteristics can be modified to tune the band-notched property (4 GHz to 5 GHz or 6 GHz to 7 GHz) and the bandwidth of the band notch (1 GHz to 2 GHz). Furthermore, the shifted notch with enhanced width of the band notch from 1 GHz to 1.5 GHz is described in this paper. The UWB slot antenna and L- and J-shaped parasitic elements also provide the band-rejection function for reference in the WiMAX (3.5 GHz) and WLAN (5 GHz to 6 GHz) regions of the spectrum. Experiment results evidence the return loss performance, radiation patterns, and antenna gains at different operational frequencies.

Dual Band-notched Monopole Antenna for 2.4 GHz WLAN and UWB Applications (이중대역 저지특성을 가지는 2.4 GHz WLAN 및 UWB 겸용 모노폴 안테나)

  • Lee, Ki-yong;Lee, Young-soon
    • The Journal of Advanced Navigation Technology
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    • v.21 no.2
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    • pp.193-199
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    • 2017
  • In the paper, a dual band-notched monopole antenna is proposed for 2.4 GHz WLAN (2.4 ~ 2.484 GHz) and UWB (3.1 ~ 10.6 GHz) applications. The 3.5 GHz WiMAX band notched characteristic is achived by a pair of L-shaped slots instead of the previous U-shaped slot on the center of the radiating patch, whereas the 7.5 GHz band notched characteristic is achived by C-shaped strip resonator placed near to the microstrip feed line. The measured impedance bandwidth (${\mid}S_{11}{\mid}{\leq}-10dB$) is 8.62 GHz (2.38 ~ 11 GHz) which is sufficient to cover 2.4 GHz WLAN and UWB band, while measured band-notched bandwidths for 3.5 GHz WiMAX and 7.5 GHz bnad are 1.13 GHz (3.15 ~ 4.28 GHz) and 800 MHz (7.2 ~ 8 GHz) respectively. In particular, it has been observed that antenna has a good omnidirectional radiation patterns and higher gain of 2.51 ~ 6.81 dBi over the entire frequency band of interest.

Compact Band-notched UWB Antenna Design Based On Transmission Line Model

  • Zhu, Xiaoming;Yang, Xiaodong;Chen, Peng
    • Journal of Electrical Engineering and Technology
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    • v.10 no.1
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    • pp.338-343
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    • 2015
  • In order to avoid the interference from existing narrowband communication systems, this paper proposes a compact band-notched UWB (ultra wideband) antenna with size of $12mm{\times}22mm{\times}1.6mm$. Transmission line model is applied to analyzing wide impedance matching characteristic of the modified base antenna, which has a gradual stepped impedance feeder structure. The proposed antenna realizes dual band-notched function by combining two biased T-shaped parasitic elements on the rear side with a window aperture on the radiation patch. The simulation current distributions of the antenna reflect resonant suppression validity of the two methods. In addition, the measured radiation characteristics demonstrate the proposed antenna prevents signal interference from WLAN (5.15-5.825GHz) and WiMAX (3.4-3.69GHz) effectively, and the measured patterns show the antenna omnidirectional radiation in working frequencies.

Multiband-Notched UWB Antenna Using Folded Slots in the Feeding Structure

  • Ta, Son Xuat;Park, Ikmo
    • Journal of electromagnetic engineering and science
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    • v.14 no.1
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    • pp.31-35
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    • 2014
  • An ultra-wideband (UWB) circular monopole antenna with a multiband-notched characteristic is proposed. The multiband-notched filter consists of three different sized folded slots, which are distinctly assigned for the notched band at the 3.5-GHz WiMAX, 5-GHz WLAN, and 8-GHz ITU bands. The proposed antenna results in a measured ${\mid}S_{11}{\mid}$ < -10 dB, which completely covers the UWB band (3.1 10.6 GHz) with three notched bands at 3.5, 5.5, and 8.0 GHz. The antenna yields an omnidirectional radiation pattern and high radiation efficiency.

Ultra-Wideband Band Pass Filter with Controllable Dual Notched Bands Using the CRLH Stubs (CRLH-Stub를 이용한 이중대역 저지 초광대역 대역통과 여파기)

  • Jung, Seung-Back;Yang, Seung-In
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.49 no.7
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    • pp.65-70
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    • 2012
  • In this paper, a compact UWB (Ultra Wideband) BPF(Band-Pass Filter) with dual notched bands is proposed using a hybrid Composited Right-Left Handed (CRLH) and Defected Ground Structure (DGS). To avoid the interferences such as Wireless LAN (Center frequency: 2.4GHz and 5.8GHz), the CRLH is employed to obtain the dual notched bands and the DGS is used to obtain the wide stop-band above the pass-band. The fabricated filter has good performance and has more than 30dB rejection at the center frequency of 2.4 GHz and 5.8GHz. The dual notched bands are easily movable by changing the CRLH parameter. Also the insertion loss is less than 0.4dB in the lower pass-band and 0.7dB in the upper pass-band, and it has small group delay variation less than 0.6ns. The size of the fabricated filter is very compact (17mm*17mm).