• Title/Summary/Keyword: Microstrip Antenna

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A study on microstrip antenna using PVDF (PVDF를 이용한 마이크로스트립 안테나에 관한 연구)

  • Kang, Hyun-Il;Song, Joon-Tae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.224-225
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    • 2005
  • The microstrip patch antenna with PVDF (poly vinylidene fluoride) substrate, were experimentally studied at frequency 6 GHz. During the design of the essential elements of microstrip antenna, EM simulation tool Ensemble V 7.0 is used. We observed the resonant frequency by DC appled electric field in a microstrip patch antenna. This research has been made as an electronically tunable microstrip antenna, taking advantage of the voltage control dielectric substrate and piezoelectric properties substrate. We discuss the effect of substrates, electric field and piezoelectric phenomena in the PVDF microstrip antenna. The antenna frequency can be changed by varying the applied dc voltage. In this paper, we propose, a new technique to agile frequency of the microstrip antenna by using the PVDF piezoelectric substrate.

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Design of Planar Microstrip Antenna at UHF ISM band for the Safety Communication of Life at Sea (해상인명 구조통신을 위한 UHF ISM 대역 평판형 마이크로스트립 안테나 설계)

  • Lee, In-Gon;Hong, Ic-Pyo
    • Journal of IKEEE
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    • v.16 no.1
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    • pp.62-68
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    • 2012
  • The planar microstrip antenna for the safety communication of life at sea is designed and manufactured to effectively receive the emergency wireless signal from the transmitter on the life vest. The proposed microstrip antenna in this paper is easy to make, light weight and cheap compared to other antennas because of printed antenna fabrication. To overcome the narrow bandwidth, large size and low gain characteristics of microstrip antenna, we use the IDMA(Identical Dual Patch Microstrip Antenna with Air-Gap) structure. The proposed antenna was fabricated with the use of 1.6mm FR4 and measured with the 28.7MHz(6.6%) of bandwidth and 3.04dBi of gain at the frequency of 426MHz. To validate the proposed antenna, we experimented the possible distance range at sea using the commercial UHF transceiver module and obtained over 5km distance for stable communication. This antenna can be widely applied to application of the UHF wireless mobile communication.

A Series Feeding Cross-Aperture Coupled Microstrip Antenna for Improving Axial Ratio Bandwidth of Circular Polarization (원형편파의 축비 대역폭 개선을 위한 직렬 급전 십자개구 결합 마이크로스트립 안테나)

  • 김형락;윤영중
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.4
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    • pp.393-400
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    • 2002
  • In this paper, a novel series feeding cross-aperture coupled microstrip antenna with the effect of hybrid feeding is proposed and demonstrated experimentally to improve narrow axial ratio bandwidth of cross-aperture coupled antenna with single feeding among the various methods for generating circular polarization. The validity of a proposed series feeding cross-aperture coupled microstrip antenna is shown by comparing experimental results between the reported and the proposed microstrip antenna, and 2${\times}$2 array microstrip antenna based on the proposed single microstrip antenna used sequential rotation technique to accomplish broader axial ratio bandwidth. In the proposed single and 2${\times}$2 array microstrip antenna, the measured axial ratio bandwidths are 110 ㎒(4.6%) and 420 ㎒(17.5%), maximum gains are 8.2 ㏈i and 12.5 ㏈i, 3 dB gain bandwidths are above 400 ㎒(16.7%), and impedance bandwidths for the VSWR<1.5 are 240 ㎒(10%) and 500 ㎒(20.8%), respectively.

Optimized Design of T-Shaped Microstrip Antenna with Various Dimensions (T형 마이크로스트립 안테나의 면적 비에 따른 최적 설계)

  • Kim, Jin-Bok;Lee, Joong-Geun
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.47 no.5
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    • pp.53-59
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    • 2010
  • There are various types of antenna fed method; coaxial probe, coupling, parasitic elements, and impedance matching. In this paper, the fed method of the proposed antenna is microstrip line type. The high frequency structure simulator (HFSS) is used to analyze the characteristics of the T-shaped microstrip antenna with various patch dimensions. In comparison with the basic microstrip antenna, this proposed T-shaped microstrip antenna with 40.38 % of patch dimensions has the optimum characteristics of resonant frequency, return loss, and radiation pattern at 2.0 GHz band.

Aperture-Coupled Microstrip Antenna with Four Slits and T-Slits for Compact Circular Polarization Operation (슬릿이 부설된 소형 원편파 개구결합 마이크로 스트립 안테나)

  • 김영두;김호용;이홍민
    • Proceedings of the IEEK Conference
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    • pp.327-330
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    • 2003
  • A novel compact circular polarization operation of the microstrip antenna with four-slits and T-slits is proposed. The mechanism for compact size antenna is investigated with the behavior of the currents on the radiating patch. The equivalent surface current path due to the slits is lengthened, reducing the resonant frequency at a fixed patch size. The proposed compact CP design can have an antenna size reduction of about 33 ∼ 45% as compared to the conventional microstrip antenna. Details of the experimental and measured results are presented and analysed.

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Frequency Agile Properties of Microstrip Antenna Using Quartz (Quartz를 이용한 마이크로스트립 안테나의 주파수 특성에 관한 연구)

  • 하용만;오승재;우형관;송준태
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.488-491
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    • 2001
  • This paper investigated that resonant frequencies of microstrip patch antenna were agile when piezoelectric materials were used as the antenna substrates. The resonant frequencies of the microstrip antenna using the piezoelectric substrate. The microstrip patch antenna made of Quartz substrate was designed and fabricated by Ensemble v 7.0 simulator. The experimental problem was compensated by Ensemble v 7.0

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Radiation Characteristics of Microstrip Antenna on the Cylindrical Bianisotropic Substrates Loaded bianisotropic superstrate

  • Yoon, Joong-Han;Lee, Sang-Mok;Park, Byung-Ha
    • Proceedings of the IEEK Conference
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    • pp.885-888
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    • 1999
  • Radiation characteristics of axial elementary current source on the cylindrical bianisotropic substrateloaded with bianisotropic superstrate layer are presented. The effects of bianisotropic superstrate cover on the radiation problems of a microstrip antenna are studied. This investigation is performed by using the Green function formulation in the spectral domain. Numerical results for the radiation pattern of the bianisotropic superstrate-loaded microstrip antenna is analyzed.

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Field Configurations in Aperture-Coupled Microstrip Antenna Structure (개구 결합 마이크로스트립 안테나 구조에서의 필드 분포)

  • 조영기;고지환;이영순;허유강
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.259-262
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    • 2002
  • The problems of electromagnetic coupling and radiation in an aperture-coupled microstrip antenna structure are discussed while focusing on the difference between two representative field configuration: parasitic-type and cavity-type. Based on the discussion, a critical look is taken at the validity of a previous description of the coupling mechanism of m aperture-coupled microstrip antenna.

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Analysis of resonant frequency in microstrip antennas using X-cut Quartz plates (X-cut quartz를 이용한 마이크로스트립 안테나의 해석)

  • Kang, Hyun-Il;Hwang, Hyun-Suk;Lee, Kyu-Il;Lee, Tae-Yong;Song, Joon-Tae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.380-381
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    • 2006
  • A technique to control the operating frequency of microstrip antenna by using the X-cut quartz substrate has been investigated experimentally and theoretically. We consider 6, 8 and 10 GHz resonance frequency in three dimensional quartz plates. Equation of linear piezoelectricity are solved for the thickness-shear approximation of X-cut quartz plates. At X-band frequencies, the microstrip antenna was voltage-controllable using the dc electric field dependence of the piezoelectric constant of X-cut quartz. This work demonstrates advantageous application for X-cut quartz plate in microstrip antenna substrates.

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Miniaturization of Circular Microstrip Antenna Using the Perturbation Effect (Perturbation 효과를 이용한 원형 마이크로스트립 안테나의 소형화)

  • Ryu Mi-Ra;Hur Jung;Woo Jong-Myung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.17 no.7
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    • pp.605-614
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    • 2006
  • In this paper, a 3D structure skimmer-shaped circular microstrip antenna is designed, the ends of whose both sides are made as DC(Depressed Carving part) applying perturbation effect to reduce the patch size of microstrip antenna operating at design frequency 1.575 GHz. The result shows its return loss, - 10 dB bandwidth, gain, - 3 dB beamwidth E, H-plane are -26.59 dB, 65 MHz(4.13 %), 4.66 dBd, $79^{\circ},\;87^{\circ}$ respectively. The diameter of the antenna is 85 mm, which is 12.4 % reduced compared to the size(97 mm) of general microstrip patch antenna. Therefore its area reduction is 23.2 %. Furthermore, a linear and circular polarized baseball-shaped circular microstrip antenna is designed to minimize the patch size of the antenna. This structure of antenna operating at the design frequency 1.575 GHz is applied with the optimum RC(Raised Carving part) & DC ratio and an asymptotic line angle. In case of linear polarized baseball-shaped circular microstrip antenna, the patch size of the antenna is 74 mm, which is 41.8 % area reduction compared to general microstrip patch antenna. In case of circular polarized baseball-shaped circular microstrip antenna, the diameter of patch is 82 mm, which is 28.5 % area reduction compare to general microstrip patch antenna linear polarized. We have verified that the perturbation effect can be applied to minimize the circular microstrip antenna.