• Title/Summary/Keyword: 433MHz Antenna

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Dual Band Antenna of 433 MHz and 920 MHz for Marine Buoy (해양 부이용 433 MHz와 920 MHz 이중 대역 안테나)

  • Seong-Real Lee
    • Journal of Advanced Navigation Technology
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    • v.25 no.6
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    • pp.523-529
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    • 2021
  • This paper shows the design and fabrication of antenna embedded in marine buoy for marine IoT service, especially automatic identification system of fishing gears. Frequency band of proposed antenna has dual band of 433 MHz and 920 MHz considering marine IoT extension. Dual pattern monopole type for 920 MHz and meander type for 433 MHz are adopted in the proposed antenna. Voltage standing wave ratio is obtained 1.548 at 433 MHz and obtained 1.5 of mean value at 920 MHz band by measuring the fabricated antenna. The maximum antenna gain of 3.83 dBi is measured at 902 MHz among 920 MHz band, while antenna gain of 433 MHz is obtained 1.18 dBi. Although antenna gain of 433 MHz is low than 920 MHz band, this gain is larger than desired value of -5 dBi. And, it is confirmed that other measured values meet the performance criteria for archiving communication distance of 10 km between marine buoy and fishing ship in automatic identification system of fishing gears.

Implementation of Miniaturized 433MHz Antenna Using IFA Structure (IFA 구조를 이용한 소형 433MHz 안테나의 구현)

  • Kang, Sang-Won;Chang, Tae-Soon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.14 no.5
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    • pp.203-208
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    • 2014
  • In this paper, the antenna of a small active RFID for 433MHz is proposed, and the proposed antenna is a kind of built-in antenna, which uses IFA structure. The performance was improved by the change of the spacing between the feed point and short strip, inserting the meander line structure in a radiator, and varying the gap between the radiator and the ground plane in the proposed antenna. To confirm the characteristics of the antenna parameters, HFSS from ANSYS Inc. was used for the analysis. The frequency band of 433MHz Active RFID is from 433.67 to 434.17 MHz. There is a value of return loss less than -9.54 dB in 433MHz band of the active RFID, and the maximum antenna gain is -4.28dBi. The Jig size of the proposed antenna is $72{\times}44{\times}1mm$, and the size of the antenna area is $35.5{\times}19.5mm$. The result proved the possibility of the practical use on miniaturized 433MHz antenna using IFA structure that came from comparing and analyzing the measured and simulated data of the antenna.

Implementation of 433/856MHz Dual Band Antenna Using IFA Structure (IFA 구조를 이용한 433/865MHz 이중대역 안테나의 구현)

  • Kang, Sang-Won;Sung, Ji-Hyun;Choe, Gwang-Je
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.15 no.3
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    • pp.163-168
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    • 2015
  • In this paper, 433/865MHz dual band antenna is proposed by using IFA structure of a PCB antenna, the performance was improved by changing of the space between the feed point and short strip, varying the gap between the radiator and the ground plane and adding the branch line in the proposed antenna. To confirm the characteristics of the antenna parameters, HFSS from ANSYS Inc. was used for the analysis. RFID frequency band of ISO-18000-7 is 433MHz and EU-RFID frequency band of ISO-18000-6 is from 865.5 to 867.5MHz. Each of the 433/865MHz bandwidth of the proposed antenna is 5.2MHz and 18.2MHz. The maximum 433MHz antenna gain is -5.74dBi, the maximum 865MHz antenna gain is -3.36dBi. The Jig size of the proposed antenna is $60{\times}44{\times}1mm$ and the size of the antenna area $44{\times}21mm$. The results proved the possibility of the practical use on 433/865MHz by using the IFA structure that came from comparing and analyzing the measured and simulated data of the antenna.

Development of 433MHz RFID Tag Antenna using Fractal Theory (프랙탈 이론을 이용한 433MHz 대역의 RFID 태그 안테나 개발)

  • Park, Dong-Kook;Cho, Ik-Hyun;Yang, Gyu-Sik
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.3
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    • pp.420-426
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    • 2008
  • In this paper, we present RFID Tag Antenna at 433MHz which can be available for RFID system. The antenna is composed of microstrip type antenna, whose dimension could be reduced by applying fractal theory. Simulated return loss and gain at 433MHz are -20.9dB, -3dBi. But there are some deviation on the point of resonance frequency between simulated and measured results. By modifying the antenna's feeding point, we obtain - l5dB return loss and verify the utility of proposed antenna.

Design and Fabrication of a Rectangular Spiral Type Antenna for 433 MHz (433 MHz TPMS용 직각 스파이럴 구조 안테나 설계 및 제작)

  • Oh, Sung-Kon;An, Jun-O;Kim, Boo-Gyoun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.6
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    • pp.752-755
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    • 2012
  • In this paper, the rectangular spiral shaped antenna is designed and fabricated for 433 MHz TPMS. Proposed antenna has the -10 dB impedance bandwidth of 23 MHz(427~450 MHz). The antenna is fabricated with the size of $5mm(W){\times}23mm(D){\times}10mm(H)$ by brass material. Return loss is below -10 dB at 433 MHz${\pm}$10 MHz mounted tire wheel and not mounted both. The radiation power is -44.21 dBm without wheel and -50.0 dBm installed wheel. The proposed antenna can be practical use through data transmission test results.

A Design of a Meander Antenna using Magneto-dielectric Material for 433.92 MHz band (433-92 MHz대 Magneto-dielectric 매질을 이용한 미앤더 안테나의 설계)

  • Tran, Viet Hong;Park, Chul-Keun;Min, Kyeong-Sik
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2005.11a
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    • pp.323-328
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    • 2005
  • The paper describes a meander antenna using magneto-dielectric composite for 433.92 MHz band. The antenna with magneto-dielectric material in this paper is suggested for miniaturization of antenna size. The return loss of meander antenna is achieved by optimizing the permittivity, $\varepsilon_r$=1.71-j0.004 and permeability, $\mu_r$=2.39+j2.58. Over all dimension of the antenna is $51\times11\times1.6mm$. The return loss and gain are -41 dB, -5dBi, respectively at 433.92 MHz.

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Design of PIFA type Spiral Antenna for Vehicle RKE Reader (차량 RKE 리더기용 PIFA형 스파이럴 안테나의 설계)

  • Oh, Dong-Jun;Yun, Ho-Jin;Jeong, Bong-Sik
    • Journal of the Institute of Convergence Signal Processing
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    • v.9 no.2
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    • pp.135-140
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    • 2008
  • In this paper, the spiral antenna with the center frequencies of 315MHz, 433MHz, and 447MHz for RKE system of a vehicle is designed on PCB. The antenna is microstrip line-fed, and applied PIFA concept near the feeding part to easily tune center frequency and input impedance. The PIFA-type spiral antenna with the size of $30mm{\times}20mm$ is designed on printed PCB by considering the effect of circuits and components on PCB, ECU case and vehicle body. Also chip inductor inserted dual-band spiral antenna of 315MHz and 447MHz is designed. We found that the antenna designed on PCB satisfied the antenna specifications through measurement and field test.

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Dual band antenna for RFID application of 433MHz and 2.45GHz (RFID에 적용 가능한 433MHz, 2.45GHz 이중대역 안테나)

  • Chang, Se-Wook;Ko, Jae-Hyung;Choi, Jin-Kyu;Kim, Hyeong-Seok
    • Proceedings of the KIEE Conference
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    • 2008.05a
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    • pp.157-158
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    • 2008
  • In this paper, a dual band microstrip patch Antenna is designed for RFID Application. The antenna shows a good performance at the frequencys, 433MHz and 2.45GHz for the radiation characteristics and input impedance matching as well. The reflection factor is lower than 15dB and a good directivity higher than 3dB is achieved for both frequency.

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(Design of RFID Reader Antenna Using Two Orthogonally Oriented 1x2 Sub-Arrays at 433 MHz) (직교형으로 배열된 2개의 1x2서브-어레이를 이용한 433MHz에서 동작하는 RFID 리더용 안테나 설계)

  • Kim Jong-Sung;Park Seung-Mo;Choi Won-Kyu;Seong Nak-Seon
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.42 no.9 s.339
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    • pp.97-100
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    • 2005
  • An orthogonal antenna is presented for reader application of radio frequency identification (RFID) at 433 MHz. Two 1x2 sub-arrays are orthogonally placed on a ground plane and two different feeding networks are applied to control horizontal and vertical radiation current flows for each sub-array, respectively. Inverted-F structures are used as radiation elements and can generate two linear polarizations by relative current distribution of radiators forming sub-arrays. Antenna gains are 2.7 and 0.4 dBi and isolation between two input ports is less than 25dB.

Development of an Optimal Design Program for a Triple-Band PIFA Using the Evolution Strategy (진화 알고리즘을 이용한 삼중 대역 PIFA 최적 설계 프로그램의 구현)

  • Ko, Jae-Hyeong;Kim, Koon-Tae;Kim, Dong-Hun;Kim, Hyeong-Seok
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.8
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    • pp.746-752
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    • 2009
  • In this paper, we deal with the development of an optimal design program for a triple-band PTFA(Planar Inverted-F Antenna) of 433 MHz, 912 MHz and 2.45 GHz by using evolution strategy. Generally, the resonance frequency of the PIFA is determined by the width and length of a U-type slot used. However the resonance frequencies of the multiple U slots are varied by the mutual effect of the slots. Thus the optimal width and length of U-type slots are determined by using an optimal design program based on the evolution strategy. To achieve this, an interface program between a commercial EM analysis tool and the optimal design program is constructed for implementing the evolution strategy technique that seeks a global optimum of the objective function through the iterative design process consisting of variation and reproduction. The resonance frequencies of the triple-band PIFA yielded by the optimal design program are 430 MHz, 910.5 MHz and 2.458 GHz that show a good agreement to the design target values.