• Title/Summary/Keyword: 900MHz Antenna

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A Study on a Near-Field Reader Antenna for 900 MHz RFID (근접 영역용 900MHz RFID 리더기 안테나에 관한 연구)

  • Park, Joung-Geun;Lee, Jong-Chul
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.11 no.3
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    • pp.23-30
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    • 2012
  • In this paper, we propose a new near-field reader antenna for 900 MHz RFID. The proposed antenna consists the micro-strip antenna with the periodic structure. The overall dimension of the antenna is $313mm{\times}152mm{\times}14mm$. The antenna has the uniform E-field distribution in near field region and the heart-shaped radiation beam pattern (Peak gain=-2 dBi). The transmitted power range is from 17 dBm to 23 dBm. We focus on minimizing the detected error by suppressing the reflected power from the metal, which is attached to the surface by tag, and by reducing the transmitted power from tag.

A Reconfigurable Antenna for Quad-Band Mobile Handset Application (4중 대역을 포함하는 휴대폰용 재구성 안테나)

  • Park, Young-Keun;Sung, Young-Je
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.5
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    • pp.570-582
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    • 2012
  • In the communication, a reconfigurable antenna using two PIN diodes is presented for quad-band(GSM900/GSM1800/GSM1900/UMTS) mobile handset applications. The proposed antenna has a size $45{\times}11{\times}6mm^3$. By independently adjusting the on/off states of two PIN diodes located on the radiating element, the proposed structure can be operated in the PIFA and loop mode, respectively. The PIN diodes are replaced by conducting tape in order to verify the concept. In regards to the fabricated reconfigurable antenna, when operating in the PIFA mode, the measured results show that the 7 dB bandwidth is 8.62 %. which covers the GSM900(880~960 MHz) band. When operating in the loop mode, the measured results show that the 7 dB bandwidth is 26.36 %, which covers the GSM1800(1,710~1,880 MHz), GSM1900(1,850~1,990 MHz), and UMTS(1,920~2,170 MHz) bands, respectively.

Design and Fabrication of Microstrip Dielectric Ceramic Antenna for 900 MHz Cordless Phones (900MHz 무선전화기용 유전체 세라믹 안테나의 설계와 제작)

  • 문창호;이만형;김영일;김덕수;이성수;노용래
    • Journal of the Korean Ceramic Society
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    • v.35 no.7
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    • pp.699-705
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    • 1998
  • This paper is about design of optimal structure of microstrip dielectric ceramic antenna with rectangular electrode patches in accordance with the cavity model and fabrication of its prototype sample operating at the frequency of 900 MHz. Results of this work can be employed as a useful too to develop and diversify ceramic antenna having superior performance and omni-directivity to that of current helical antenna.

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Design of a 900 MHz RFID Compact LTCC Package Reader Antenna Using Faraday Cage (Faraday Cage를 이용한 900 MHz RFID 소형 LTCC 패키지 리더 안테나의 설계)

  • Kim, Ho-Yong;Mun, Byung-In;Lim, Hyung-Jun;Lee, Hong-Min
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.5 s.120
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    • pp.563-568
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    • 2007
  • In this paper, the proposed package antenna, which is meander line structure with short pin, is miniaturized to realize RF-SoP at 900 MHz RFID band. The RFID BGA(Ball Grid Array) chip is put in a cavity of LTCC Layers. The coupling and cross talk, which are happen between BGA chip and proposed package antenna, are reduced by faraday cage, which consists of ground and via fences, is realized to enhance the isolation between BGA chip and antenna. The proposed antenna structure is focused on the package level antenna realization at low frequency band. The novel proposed package antenna size is $13mm{\times}9mm{\times}3.51mm$. The measured resonance frequency is 0.893 GHz. The impedance bandwidth is 9 MHz. The maximum gain of radiation pattern is -2.36 dBi.

Study of the 900 MHz Near Field RFID System for the Jewelry Management (귀금속 관리를 위한 900 MHz Near Field RFID 시스템에 관한 연구)

  • Lee, Jin-Seong;Lee, Kyoung-Hwan;Chung, Chung-You
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.1B
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    • pp.78-84
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    • 2010
  • A fixed 900 MHz near field RFID system is developed to provide information; market efficiency, jewelry information and the circulation history information in real time, to the customers. The developed RFID system for the jewelry management consists of a reader, antenna and a CPU in a integrated type. The system size is $38\;{\times}\;25\;{\times}\;19\;cm^3$, the operated frequency band of the reader antenna is 905 ~ 926 MHz. The maximum gain of the embedded reader antenna is 5.1 dBii(@ 910 MHz). Honeycomb tag manufactured by RSI Co. is suitable for the jewelry management than another other commercial near field tags. The tagging method and the tagging location of Honeycomb tag are suggested. In the suggested system, the maximum reading range is about 16 cm, and the zone with 100 % recognition rate is 10 cm from the radom of the reader antenna.

Branch Loop Antenna for the Mobile Handset (휴대 단말기용 브랜치 루프안테나)

  • Son, Taeho
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.12 no.1
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    • pp.58-65
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    • 2013
  • It's introduced a BLA(Branch Loop Antenna) that is modified from conventional loop, and verified antenna performances for applying to mobile handset. Branch elements are added to a rectangular loop, and low resonance is obtained by the length of the branch line. When resonance frequency of a single loop is 2.5GHz, BLA had near 900 MHz under the same antenna size. Multiple resonances are established by the locations of branch connection and their lengths. By the implementation and measurement for the dual band BLA, it's showed 75MHz -10dB bandwidth and -3.03~-1.46dBi average gains with 49.73~71.39% efficiencies at GSM900 band, and 90MHz -6dB bandwidth and -8.14~-2.17dBi average gains with 15.34~60.62% efficiencies at DCS1900 band. And H-plane radiation patterns were omni-directional. These performances are good for the mobile handset antenna.

Low Power Rectenna for Wireless Power Transmission at 900MHz (900MHz대 무선 전력 전송을 위한 저전력 렉테나)

  • Kim, Yea-Ji;Park, Dong-Kook;Sohn, Kyung-Rak;Kang, In-Ho
    • Journal of Advanced Marine Engineering and Technology
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    • v.35 no.4
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    • pp.506-511
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    • 2011
  • In this paper, a rectenna for wireless power transmission at 900MHz is proposed. Rectenna is a device transforming RF power into DC power and it may consist of a antenna, rectifying and charging circuits. In this paper, we designed a slot antenna to receive 900MHz signal, a rectifying circuit of about 40% efficiency at 0dBm input, and a charging circuit to store a weak power signal and supply constant voltage to load. From the experiment using a RFID reader as a transmitter for 1W power, it was found that the proposed rectenna receiving about 0dBm power can supply 3.3V constant voltage to 50$k{\Omega}$ load during 280sec.

Design and Implementation of the Electromagnetic Adaptive RFID Tag in 900MHz (전파 적응형 900MHz 수동형 RFID 태그 설계 및 구현)

  • Shon, Hyumg-Doh;Kang, Seung-Chan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.5
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    • pp.1141-1146
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    • 2011
  • In this paper, an adaptive RFID tag antenna in 900MHz for using in inadequate electromagnetic environment is designed and implemented. The dimension of the proposed passive tag is $102mm{\times}102mm{\times}9mm$, the operating frequency band is 908~914MHz and the detection range is 5.1m. This paper describes the development of the thermal, water and impact resisting tag. The implemented tag can be used for the inadequate environment such as in-built tag on the ground for the car management service.

A Design of Miniaturized Built-in Penta-Band Chip Antenna for Mobile Handset (휴대 단말기 내장형 5중 대역 칩 안테나 설계)

  • Choi, Hyeng-Cheul;Kim, Hyung-Hoon;Park, Jong-Il;Kim, Hyeong-Dong
    • 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.288-297
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    • 2007
  • The novel internal monopole chip antenna of penta-band operation for GSM850/GSM900/DCS/USPCS/WCDMA bands for mobile phones is proposed. This antenna occupies a small volume $8\times3.2\times20mm^3$ and is suitable to be embedded in a mobile phone as an internal antenna. The minimization of the proposed antenna was realized by using spiral line structure and meander line structure on FR-4 of dielectric$(\varepsilon_r=4.4)$. The designed antenna has the wide-band operation in the upper band by overlapping high order resonances. The measured bandwidth of this antenna (VSWR>3) is 150MHz$(1,030\sim1,180\;MHz)$ in the lower band operation and 650 MHz$(1,760\sim2,410\;MHz)$ in higher band operation. The measured radiation efficiency within bandwidth(VSWR 3:1) is over 50 %. The antenna has been designed by a commercial software HFSS.

Design and Fabrication of Triple-Band Antenna with Three Branch Lines for WLAN Applications (세 개의 분기선로를 갖는 WLAN에 적용가능한 삼중대역 안테나 설계 및 제작)

  • Ha, Sung-Jea;Yoon, Joong-Han
    • The Journal of the Korea institute of electronic communication sciences
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    • v.14 no.1
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    • pp.119-126
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    • 2019
  • In this paper, a monopole antenna applicable to WLAN standardization is designed, fabricated, and tested. The proposed antenna is designed to have three microstrip lines based on microstrip feeding method and inserted one stub to enhance impedance characteristics. Then, it obtained triple band characteristics of the proposed antenna. We adjusted and optimized the lengths and width of the three microstrip lines and one inserted stub to obtain the required impedance bandwidth for this paper. The proposed antenna has $23.0mm(W){\times}53.1mm(L1)$ on a dielectric substrate of $24.0mm(W1){\times}60.0mm(L){\times}1.0mm$ size. From the fabrication and measurement results, bandwidths of 158 MHz (841 to 1000 MHz) for 900 MHz band, 630 MHz (2.32 to 2.95 GHz) for 2400 MHz band, and 1,040 MHz (4.95 to 5.99 GHz) for 5000 MHz band were obtained based on the impedance bandwidth. The fabricated antenna also obtained the measured gain and radiation pattern characteristics in the required triple band of the proposed antenna.