• Title/Summary/Keyword: rectangular patch

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Analysis and Design of the Cylindrical-rectangular Patch Microstrip Resonator (원통면 사각패치 마이크로스트립 공진기 특성 해석 및 설계)

  • 이민수;이상설
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.16 no.10
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    • pp.925-933
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    • 1991
  • Caracteristics of cylindrical rectanyular patch microshtrip resonator are analyzed by cavity model. To minimize the error of resonant frequency due to fringing field, the resonant frequency is calcylated by the concept of effective dielectric constant. The transmisson type resonator operating at 3GHz is designed and manufactured. The measured data of the resonant frequency and reflection loss are 3.019Ghz and \ulcorner32.78dB respectively. These results nearly coincide with theoretical results.

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Study of Microstrip Patch Antenna for 5 GHz (5 GHz 대역의 마이크로스트립 패치 안테나 특성 연구)

  • Park, Yong-Wook
    • The Journal of the Korea institute of electronic communication sciences
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    • v.14 no.1
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    • pp.55-60
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    • 2019
  • Because of an rapid increase of using a wireless Internet, the originally used communication of 2.4 GHz band was saturated and crossed and there were some problems. According to this, the development of a wireless Internet technology of 5 GHz Band proceeded. In the thesis we researched a Square Slot Microstrip Patch Antenna available in 5 GHz band of wireless communication. The research designed and analyzed the Antenna through HFSS. Ultimately, we compared and analyzed made Antenna through a Network Analyzer.

A Reconfigurable Multilayer Substrate Antenna for Aerospace Applications

  • amine, Ksiksi Mohamed;azizi, Mohamed karim;Gharsallah, Ali
    • International Journal of Computer Science & Network Security
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    • v.21 no.9
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    • pp.358-361
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    • 2021
  • In this paper, we have simulated a rectangular microstrip patch antenna for aerospace applications based on graphen as a conductor and a multilayer substrate .as a result of the use of the graphen patch we obtained a reconfigurable antenna on the frequency range (0.6-0.7 terahertz) with a gain up to 12 db. The simulation of this antenna has been performed by using CST Microwave Studio, which is a commercially available finite integral based electromagnetic simulator.

Design of Square Patch Reflectarray Antenna with U-type Slot (U자형 슬롯을 갖는 정사각형 패치 리플렉트어레이 안테나의 설계)

  • Kim, Seon-Hye;Choi, Hak-Keun;Park, Jae-Hyun
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.11 no.3
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    • pp.9-15
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    • 2011
  • The microstrip reflectarray antenna is rapidly becoming an attractive alternative solution to the traditional parabolic reflector antenna. However, the bandwidth of the microstrip reflectarray using the single layer structure is very narrow. To obtain wide bandwidth characteristic, the microstrip reflectarray using the multi-layer structure has been used, but it has some disadvantages such as high cost and complicated design. In this paper, to obtain low cost and wide bandwidth, the microstrip reflectarray antenna composed of square patch with two U-slots using the single-layer structure is proposed. The proposed antenna demonstrate radiation efficiency closed to 55.5 % and 1 dB gain bandwidth over 14 % at 12.5 GHz.

A Broadband Microstrip Array Antenna for 3G Smart Antenna System Testbed

  • Rashid, Zainol Abidin Abdul;Islam, Mohammad Tariqul;Jiunn, Ng Kok
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.5 no.1
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    • pp.43-59
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    • 2006
  • A compact and broadband $4\times1$ array antenna was developed for 3G smart antenna system testbed. The $4\times1$ uniform linear away antenna was designed to operate at 1.885 to 2.2GHz with a total bandwidth of 315MHz. The array elements were based on the novel broadband L-probe fed inverted hybrid E-H (LIEH) shaped microstrip patch, which offers 22% size reduction to the conventional rectangular microstrip patch antenna. For steering the antenna beam, a commercial variable attenuator (KAT1D04SA002), a variable phase shifter (KPH350SC00) with four units each, and the corporate 4-ways Wilkinson power divider which was fabricated in-house were integrated to form the beamforming feed network. The developed antenna has an impedance bandwidth of 17.32% $(VSWR\leq1.5)$, 21.78% $(VSWR\leq2)$ with respect to center frequency 2.02GHz and with an achievable gain of 11.9dBi. The design antenna offer a broadband, compact and mobile solution for a 3G smart antenna testbed to fully characterized the IMT-2000 radio specifications and system performances.

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The Analysis of Arbitrarily Shaped Microstrip Patch Antennas using the MPIE (MPIE를 이용한 임의의 형상을 갖는 마이크로스트립 패치 안테나의 해석)

  • 정대호;김태원;김정기
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.18 no.8
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    • pp.1059-1068
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    • 1993
  • We will put the emphasis on the analysis of arbitrarily shaped microstrip antennas. The most general and rigorous treatment of microstrip antennas is given by the electric field integral equation(EFIE), usally formulated in the spectral domain. In this paper, we use a modification of EFIE, called the mixed potential integral equation(MPIE) , and we solve it in the space domain. This technique uses Green's functions associated with the scalar and vector potential which are calculated by using stratified media theory and are expressed as Sommerfeld integrals. The integral equation is solved by a moment's method using rooftop subsectional basis function. Thus, microstrip patches of any shape can be analysed at any frequency and for any substrate. Numerical results for a rectangular patch and for a L-shaped patch are given and compared with measured values.

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A Novel Broadband Single-Patch Microstrip Antenna for IMT-2000 (IMT-2000용 광대역 단일 패치 마이크로스트립 안테나)

  • 유태훈;이승엽;박한규
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.25 no.6A
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    • pp.833-838
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    • 2000
  • In this paper, a novel type of wideband single-patch microstrip antenna using the reactive-loading technique is presented. We demonstrated that, by inserting stubs at both of the radiating edges, the frequencies of the two resonant modes are closely spaced to form a wide operating bandwidth. Segmentation technique and cavity model are used to analyze the antenna characteristics and experimental data are show to be in good agreement with the calculated results. With the proposed structure, the measured antenna bandwidth of 230MHz is obtained, which is almost 2.65 times larger than that of an unloaded rectangular patch antenna and fully covers the whole frequency range of 1.885GHz~2.025GHz allocated to IMT-2000.

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A Broadband Microstrip Array Antenna for 3G Smart Antenna System Testbed

  • Rashid, Zainol Abidin Abdul;Islam, Mohammad Tariqul;Jiunn, Ng Kok
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.7 no.1
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    • pp.41-58
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    • 2007
  • A compact and broadband $4{\times}1$ array antenna was developed for 3G smart antenna system testbed. The $4{\times}1$ uniform linear array antenna was designed to operate at 1.885 to 2.2GHz with a total bandwidth of 315MHz. The array elements were based on the novel broadband L-probe fed inverted hybrid E-H (LIEH) shaped microstrip patch, which offers 22% size reduction to the conventional rectangular microstrip patch antenna. For steering the antenna beam, a commercial variable attenuator (KAT1D04SA002), a variable phase shifter (KPH350SC00) with four units each, and the corporate 4-ways Wilkinson power divider which was fabricated in-house were integrated to form the beamforming feed network. The developed antenna has an impedance bandwidth of 17.32% ($VSWR{\leq}1.5$), 21.78% ($VSWR{\leq}2$) with respect to center frequency 2.02GHz and with an achievable gain of 11.9dBi. The design antenna offer a broadband, compact and mobile solution for a 3G smart antenna testbed to fully characterized the IMT-2000 radio specifications and system performances.

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The Design of Microstrip Array Antenna Depend on Patch Size (패치크기에 의존하는 마이크로스트립 어레이 안테나 설계)

  • 고영혁;이종악;정의붕
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.16 no.11
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    • pp.1063-1070
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    • 1991
  • A microstrip array antenna are designed to depend on the size of rectangular microstrip patch for the relative current destribution to be 1:2:2:1 or 1:1:2:2:1:1 using Tchebyscheff polynominals, and it consist of sharp beam pattern. Gain difference between the main lobe and sidelobe is calculated for theoritical values of 21.97 db or 29.54 db. The designed microstrip array antenna are measureed various characteristics, such as return loss, resonant frequency, radiation pattern, bandwidth, beamwidth, and agreed with each other and theoretical value. Also it is presented a process of phase variation of patch array antenna depend on relative current distribution for beam scanning.

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Compact Active Integrated Antenna with Rectagular Ring Structure for UHF RFID Reader (UHF RFID Reader용 사각 환형 소형 능동 안테나)

  • Yun, Gi-Ho
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.3 s.118
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    • pp.315-322
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    • 2007
  • In this paper, active integrated antenna with left hand circular polarization(LHCP) for a transmitter of UHF RFID reader has been described. A novel rectangular ring patch as a radiator of the active antenna is proposed for easier impedance matching, smaller patch size, and LHCP characteristics. An amplification circuit is placed in the opening area of the radiator and is combined with it to work as oscillating circuit around 915 MHz. From the test results, impedance bandwidth of 29 MHz, 3 dB axial ratio bandwidth of 20 MHz, 3 dB beamwidth of 85 degree, and effective radiation power of 8.8 dBm have been obtained.