• Title/Summary/Keyword: U-slot antenna

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Design of a Pot-Shaped Monopole Antenna with Dual Band Notched Characteristics for UWB Application

  • Mok, Kwang Yun;Rhee, Young Chul;Yoon, Joong Han
    • Journal of electromagnetic engineering and science
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    • v.17 no.1
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    • pp.44-49
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    • 2017
  • A compact planar microstrip-fed ultra-wideband (UWB) antenna with a dual band-notched for UWB application is presented and analyzed. By inserting a U-shaped slot and inverted U-shaped slot into the pot-shaped radiator, two notched bands are achieved. By optimizing the width and length of the U-shaped slots and inverted U-shaped slot, a desired bandwidth of voltage standing wave ratio (VSWR) less than 2.0 can be achieved, ranging from UWB bands with notched dual bands. The proposed antenna is fabricated on an inexpensive FR-4 substrate with overall dimensions of $28.0mm{\times}39.5mm$. The measured results confirm that the proposed antenna covers from 1.775 to over 13.075 GHz with two rejection bands of around 3.325-3.925 GHz and 5.3125-6.025 GHz. In addition, the proposed antenna showed good radiation characteristics and gains in the UWB bands.

Design and Fabrication of a Weathercock-Shaped Double Bandwidth Microstrip Patch Antenna that Combines U-slot and Short-pin for WLAN Systems Systems (WLAN System을 위한 U-slot 및 Short-pin 결합한 바람개비 모양의 이중대역(5.2/5.8GHz) 마이크로스트립 패치 안테나 설계 및 제작)

  • Kim, Soon-Seob;Choi, Young-June;Joo, Young-Dal;Jung, Yoong-Joo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38B no.5
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    • pp.337-343
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    • 2013
  • In this paper, IEEE 802.11 based WLAN(5.2/5.8GHz) wideband Weathercock-shaped microstrip patch antenna was designed and manufactured. The antenna has a size of $17.4{\times}17.4mm^2$ and utilized FR-4 board. The size was minimized for mobility, and Weathercock-shaped U-slot and short-pin was inserted to satisfy adequate bandwidth and double bandwidth resonance characteristics. In addition, the antenna incorporated single both-sided patch, and simulation design optimized the Weathercock-shaped, position of the U-slot and the short-pin, and the length of the patch for the measurement. The manufactured antenna achieved a bandwidth of 695MHz from 5.2~5.8GHz zone(Return loss<-10dB). Achieved a beam width of $81.13^{\circ}$ and $85.43^{\circ}$ for 3-dB beam width of H plane and E p;ane radiation pattern, there was 3.17~4.85dBi gain.

Single-feed dual-band square microstrip patch antenna with U-slot

  • Oh, Sang-Jin;Yoon, Joon-Han;An, Gyoo-Chul;Lee, Sang-Mok;Kwak, Kyung-Sup
    • Proceedings of the IEEK Conference
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    • 2000.07a
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    • pp.199-202
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    • 2000
  • The U-slot patch antenna has been found experimentally to provide impedance and gain bandwidths. Experiment and simulation results include impedance bandwidth, copolar and crosspolar-pattern characteristics and gain measurements. If one of the parameters such as patch width or feed position is varied, U-slot patch can also function as a dual-frequency antenna.

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A Study on Bandwidth Broadening of U-slot Microstrip Patch Antenna Design with L-Shaped Inset-Feed Structure (L자형 Inset 급전구조를 갖는 U슬롯 마이크로스트립 패치 안테나의 광대역화에 관한 연구)

  • Kim, Jae-Yeon;Chang, Tae-Soon;Hur, Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.5
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    • pp.33-39
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    • 2021
  • In this study, we tried to find the correlation of the parameters and dual resonance of U-slot microstrip patch antenna with L-shaped Inset-feed structure and design broadband antenna using them. In the first step, we classified cases where dual resonance occurs through changes in antenna parameters that affect antenna performance. In the second step, we correlated each antenna parameter to the location and intensity of the resonance point, and 3 dB bandwidth. Next, antenna simulation confirmed the process of designing to have wide bandwidth using the correlation in the second step previously presented in the U-slot antenna case with narrow bandwidth. Finally, we fabricated a designed antenna and demonstrated the validity of antenna bandwidth broadening through the correlation analysis.

Design of U-Slot $2{\times}2$ array microstrip wideband antenna for wireless LAN (무선랜용 U-Slot $2{\times}2$ 배열 마이크로스트립 광대역 안테나 설계)

  • Ju Seong-nam;Kim Kab-ki
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.2
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    • pp.374-379
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    • 2006
  • In this paper, the high Gain and the wideband microstrip patch antenna, which is applicable to 5 GHz band wireless LAN, is designed and fabricated. Firstly to widen the bandwidth of microstrip antenna, U-Slot in rectangular form patch is inserted and used the microstrip line-Coaxial probe feeding method. Secondly, the antenna gain is improved to be embodied in $2{\times}2$ array form. As a result, in this paper, is designed and fabricated 5 GHz Band wideband U-Slot $2{\times}2$ array patch antenna using microstrip line-coaxial probe feeder. The U-Slot $2{\times}2$ array patch antenna were fabricated on the PEC using press-technique that is based on the simulation results. And the Anritsu 37169A vector network analyzer has been used in measurement of a prototype antenna. As a result, it was measured that the superior characteristic of wideband showing approximately 1 GHz ($5.110 GHz{\sim} 6.142 GHz$) of input return loss (VSWR < 2) in resonant frequency of 5 GHz band. And the antenna gain is 13 dBi, in both the E-plane and H-plane measured at 5.15 GHz, 5.35 GHz, 5.50 GHz, and 5.87 GHz.

A Broadband Characteristic of Wide Slot Planar Antenna By CPW-Fed (CPW급전에 의한 폭넓은 평면 슬롯안테나의 광대역특성)

  • Lee, Hyeon-Jin;Seo, Jang-Soo
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.4
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    • pp.374-376
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    • 2009
  • In this paper, a CPW fed and inversed U-type monopole structure wide slot antenna for novel broadband calacturictics 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 2.3 GHz(3.85~6.15 GHz) at 10 dB and the simulated antenna gain is about 6 dBi at 5.4 GHz.

CPW Feed Wideband U-slot Microstrip Antenna

  • Lee, Jong-In;Lee, Byoung-Moo;Yoon, Young-Joong
    • Journal of electromagnetic engineering and science
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    • v.2 no.1
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    • pp.11-15
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    • 2002
  • In this paper, we have proposed the new configuration of wideband antenna using CPW fred lines. The proposed antenna has CPW feed lines and U-slot to achieve wade bandwidth with good impedance matching. The use of CPW feed line can decrease the number of substrates. It is compared with the conventional antenna find by a microstrip fled line. The parameters of CPW fred lines were studied by using the quasi-static approximation which is based on the conformal mapping method. The analysis of CPW discontinuities such as the tapered-step structure and the open ended gap were studied by using the quasi-static approximation which is based on the boundary element method. Also, the equivalent circuit model of multi-layer antenna were proposed using the cavity model. Experiment results of the proposed antenna 7how wide-bandwidth characteristics and good radiation patterns in passband.

The Design and Manufactured of U-Slot Broadband Antenna using L-Shaped 800MHz Band (800MHz 대역용 L형 급전구조를 이용한 U-Slot 광대역 안테나 설계 및 제작)

  • Kim, Kab-Ki
    • Journal of Advanced Navigation Technology
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    • v.10 no.4
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    • pp.342-347
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    • 2006
  • In this paper, we have designed 800[MHz] broad band antenna that is improves a narrow bandwidth problem of microstrip antenna and it will be able to integrate GSM, TRS band including the CDMA band. It had L-shaped feeding structure and added the U-slot it used a duplex resonance effect. Also for the improvement of profit the stack it did with the perpendicular. It seems to be good quality that design and manufactured antenna frequency bandwidth(VSWR 2:1) is 789~1086[MHz] with 297[MHz](33%). Also the E-plan and H-plan all profit 9.4[dBi] above, 3[dB] beam width was visible the quality which above $61^{\circ}$ is improved.

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Design and Fabrication of Wideband U-sloted Bow-Tie Microstrip Antenna for 5.25GHz Band Wireless LAN (5.25GHz 대역의 무선 LAN을 위한 광대역 U-슬롯 Bow-Tie 마이크로스트립 안테나 설계 및 제작)

  • 강석엽;이원종;박효달
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.2A
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    • pp.195-201
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    • 2004
  • In this paper, U-Shaped slot Bow-Tie antenna for 5.15㎓∼5.35㎓ is designed, fabricated, and measured. The prototype consist of U-Shaped slot. To obtain suitable bandwidth, the form layer is inserted between ground plane and substrate. Important parameters in the design are U-slot length, width, position, air-gap height, and feed point position. From these parameters optimized, a U-shaped slot Bow-Tie antenna is fabricated and measured. The measured results of the antenna are obtained as follows results. The resonant frequency of the Fabrication U-shaped slot Bow-Tie antenna is 5.28㎓, bandwidth for approximately 7.76%(VSWR<1.2) and the gain is 4∼7dBi. The experimental far-field patterns are stable across the pass band. The 3dB bandwidth in Elevation and Azimuth are 73.63$^{\circ}$and 65.08$^{\circ}$, respectively.

U-slot Microstrip Antenna with U-shaped Parasitic Patches (U-형태의 기생 패치를 가지는 U-슬롯 마이크로스트립 안테나)

  • Kim, Ji-Hyung;Oh, Don-Jin;Park, Ik--Mo;Park, Yong-Bae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.5
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    • pp.428-434
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    • 2009
  • In this paper, we propose an U-slot microstrip antenna with the U-shaped parasitic patches. U-slot and parasitic patches make two resonant frequencies and one additional resonant frequency, respectively, so that the impedance band-width of the antenna is expanded. The size of radiator part is $64{\times}53\;mm^2$ and the entire size of the antenna is $150{\times}150{\times}11.5\;mm^3$. The measured bandwidth is $1.85{\sim}2.40\;GHz$. Thus, our antenna can be used for DCS1900, WCDMA and WiMax services. The radiation characteristic is almost same in the bandwidth, the beam width is about $60^{\circ}$, and the gain is more than 7 dBi.