• Title/Summary/Keyword: U-slot

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Optimum design of Triple-band PIFA using Evolution strategy (Evolution strategy 기법을 이용한 삼중대역 PIFA 최적 설계)

  • Ko, Jae-Hyeong;Paek, Hyun;Kim, Koon-Tae;Kim, Tae-Seong;Park, Doh-Hyeon;Ahn, Chang-Hoi;Kim, Hyeong-Seok
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1561_1562
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    • 2009
  • In this paper, designed triple-band antenna of PIFA(Planar Inverted-F Antenna) structure with U-slot. We designed optimal PIFA structure using Evolution Strategy(ES) about two U-slot parameters. We materialized API(Application Program Interface) about EM simulator and Excel using VB(Visual Basic). The result of ES for triple-band PIFA are resonant frequency of 430MHz, 910.5MHz, 2458.5MHz.

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CELLULAR/DCS/US-PCS Triple-Band Internal Antenna with a Novel Feeding Structure

  • Jung, Byung-Woon
    • Journal of information and communication convergence engineering
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    • v.6 no.2
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    • pp.172-176
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    • 2008
  • This paper presents a novel feeding structure of the triple-band internal antenna which covers CELLVLAR/DCS/US-PCS bands. The proposed antenna consists of a U-slot patch radiator with a shorting post connected with ground plane and symmetric feeding lines with respective a feeding and shorting posts on both faces of the fixed FR-4 substrate. Through the simulation and experimental results, the proposed antenna is confirmed to have the features of less interference with a human head/body, broad bandwidth, desirable radiation patterns and efficiency for triple-band applications.

Design for a Dual-Frequency Antenna-in-Package

  • Li, Li;Han, Liping;Han, Guorui;Chen, Xinwei;Geng, Yanfeng;Zhang, Wenmei
    • ETRI Journal
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    • v.32 no.4
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    • pp.614-617
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    • 2010
  • For an antenna-in-package (AiP), via holes are used to connect the antenna ground and system ground. In this letter, a dual-frequency AiP with a U-slot embedded in the patch is proposed. By properly arranging three via holes under the non-radiating edge, an AiP with two resonant frequencies is realized. Then a U-slot is embedded in the patch to further improve the bandwidth of the AiP. To validate the proposed design, an AiP with the bandwidth of 4.49% at 2.45 GHz and 6.02% at 5.32 GHz is achieved and fabricated. The measured results agree with the simulated results.

Reconfigurable Microstrip Patch Antenna with Switchable Polarization

  • Chung, Kyung-Ho;Nam, Yong-Sik;Yun, Tae-Yeoul;Choi, Jae-Hoon
    • ETRI Journal
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    • v.28 no.3
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    • pp.379-382
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    • 2006
  • A novel reconfigurable microstrip patch antenna with frequency and polarization diversities is proposed. A U-slot is incorporated into a square patch, and a PIN diode is utilized to switch the slot on and off, which realizes the frequency diversity characteristic. The polarization diversities among linear polarization (LP), right-hand circular polarization (RHCP), and left-hand circular polarization (LHCP) are also obtained by switching three PIN diodes on the slot and the truncating corners of a square patch on and off. The antenna design and experimental results are presented.

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Digital simulation of hysteresis motor performance using Preisach model considering time and space harmonics (Preisach 모델을 이용한 히스테리시스 모터 고조파 특성 시뮬레이션)

  • Jung, Hoon;Hong, Sun-Ki;Won, Jong-Su
    • Proceedings of the KIEE Conference
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    • 1988.11a
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    • pp.5-8
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    • 1988
  • A digital simulation method for Hysteresis motor using Preisach model is proposed. From this, the instantaneous torque, hysteresis loss of rotor can be calculated, considering slot and winding distribution and current harmonics.

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Design of Wideband Antenna for IEEE 802.11a (IEEE 802.11a용 광대역 안테나 설계)

  • Ju Seong-Nam;Kim Pyoung-Gug;Kim Kab-Ki
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.5 s.108
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    • pp.416-422
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    • 2006
  • In this paper, we have designed and favricated the high gain and wideband microstrip patch antenna including IEEE 802.11a. To widen the bandwidth of microstrip antenna, firstly we have used the microstrip line-coaxial probe feeding method and inserted a U-slot in the rectangular patch. Secondly, to improve the antenna gain, we have used a $2{\times}2$ array structure. From the measured results, wideband characteristics of 1 GHz bandwidth($5.110{\sim}6.142$ GHz) for VSWR<2 was obtained. The measured eain was 13 dBi in both the E-plane and H-plane at the frequency of 5.15 GHz, 5.35 GHz, 5.50 GHz, and 5.85 GHz.

U-shaped Wideband Microstrip Antenna on Air Substrate (Air 기판을 이용한 U형 슬롯을 갖는 광대역 마이크로스트립 안테나)

  • Ceong, Hyi-Thaek;Kang, Young-Man;Rhee, Seung-Yeop
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.5
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    • pp.937-942
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    • 2018
  • This paper maximizes the research on broadband characteristics by using air layer instead of using microstrip structure of radiation part with U-shaped slot patched inside and microstrip antenna in order to make the microstrip antenna to have broadband characteristics. Experimental results show that the VSWR is 1.4 or less than the mobile communication frequency band(820~950MHz) and the gain of the antenna is 8.2dBd. This means that the antenna can be miniaturized, and it can be used in the wireless communication fields, and the mobile communication fields for other frequency bands in the future.

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.

Analysis of Electromagnetic Coupling to an Infinitly Long Wire through a Slot in an Infinite Conducting Plate (무한도선과 무한 도체평판에 있는 슬롯간의 전자기적 결합에 대한 해석)

  • Baek, W. S.;Lee, C. H.;Cho, U. H.;Cho, Y. K.;Son, H.
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.8 no.2
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    • pp.137-150
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    • 1997
  • The problem of electromagnetic coupling into a thin conducting wire through a slot in an infinite conducting is analyzed by use of MPIE(mixed potential integral equation) and two- dimensional moment method using subsectional(rooftop) basis functions. The equivalent circuit is derived using a center-repesentation method which is valid in a narrow slot case. The equi- valent magnetic currents on the slot and the induced currents on the wire are caculated respec- tively, for the TM wave is incident upon the slot with arbitrary angle of incidence. The theoretical transmission coefficients of transmission line which is composed of thin-wire and infinite conducting plate with a narrow slot are compared and found to be in good agreement with experimental results.

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