• Title/Summary/Keyword: PCS/IMT-2000

Search Result 73, Processing Time 0.028 seconds

Broadband Microstrip Patch Antenna

  • Lee Ho-Jun;Lee Jae-Young;Kim Jong-Kyu
    • Proceedings of the International Microelectronics And Packaging Society Conference
    • /
    • 2003.11a
    • /
    • pp.230-233
    • /
    • 2003
  • In this paper, the wideband microstrip patch antennas for the Personal communications Service $(PCS\;:\;1750\~1870\;MHz)$ and International Mobile Telecommunications-2000 $(IMT-2000\;:\;1920\~2170\;MHz)$ dual band are studied. Experimental and simulation results on the dual band antenna are presented. Simulation results are in good agreement with measurements. The experimental and simulation results confirm the wideband characteristics of the antenna. The studied antenna satisfied the wideband characteristics that are required characteristics for above 420 MHz impedance bandwidth for the PCS and IMT-2000 dual band antenna. In this paper, through the designing of a dual band antenna, we have presented the availability for PCS & IMT-2000 base station antenna. An impedance bandwidth of $31\%(VSWR<1.5,\;615\;MHz)$ and a maximum gain of 7dBi can be achieved. The radiation pattern is stable across the passband.

  • PDF

A Design of ASP Microstrip Antenna for PCS band and IMT-2000 band (PCS 대역과 IMT-2000 대역 겸용 ASP 마이크로스트립 안테나 설계)

  • Lee, Eun-Gyu;Jang, Young-Chul;Lee, Jae-Wook;Lee, Won-Hui;Hur, Jung
    • Proceedings of the IEEK Conference
    • /
    • 2001.06a
    • /
    • pp.397-400
    • /
    • 2001
  • In this paper, to improve bandwidth of microstrip antenna, we discussed the patch structure using Aperture Stacked Patch. To provid PCS service and IMT-2000 service simultaneous, a microstrip patch antenna needs impedance bandwidth of 22%. But typical microstrip patch antennas have impedance bandwidth of 3∼6%. To analyze characteristics of microstrip pach antenna, we used Ensemble of commercial software. The microsrtip patch antenna was designed and fabricated, tuned. We get following results; 650MHz(33%) of impedance bandwidth for VSWR 1.5. The measured gain of ASP microstrip antenna is 6.94dBi.

  • PDF

A Study on the Development of Dual-band PLL Frequency Synthesizer for miniature Repeater (초소형 중계기용 듀얼 밴드 주파수합성기 개발에 관한 연구)

  • 나영수;김진섭;강용철;변상기;나극환
    • Proceedings of the IEEK Conference
    • /
    • 2003.11c
    • /
    • pp.37-40
    • /
    • 2003
  • The 1.63㎓, 2.33㎓ dual-band PLL frequency synthesizer has been developed for applications to the miniature repeater. The miniature dual-band repeater will be used at shopping mall, basements and underground parking lots. The in-loop 1.63㎓, 2.33㎓ dual-band PLL frequency synthesizer has been developed by designing Si BJT VCO and PLL loop circuits with Colpitts. The prototype of 1.63㎓, 2.33㎓ dual-band PLL frequency synthesizer of size 19${\times}$19${\times}$8(mm) has shown operating frequencies of 1.63㎓, 2.33㎓ ranges, RF output of 1dBm(PCS), 1dBm(IMT-2000), phase noise of -100 dBc/Hz(PCS), -95dBc/Hz(IMT-2000) at 10KHz offset, harmonics suppression of -24dB c(PCS), -15dBc(IMT-2000).

  • PDF

Characteristics of Wideband Patch Antenna with an L-Strip-Fed Structure (L-스트립 급전구조를 갖는 적층 패치 안테나의 특성)

  • 전주성;김장욱;김종규
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.13 no.4
    • /
    • pp.366-372
    • /
    • 2002
  • A wideband stacked patch antenna fed by an L-strip feeder is studied experimentally. The objective of this paper is to design small wideband antenna for PCS and IMT-2000 service. Experimental results confirm that an impedance bandwidth(VSWR$\leq$2) of 704.7 MHz(35.95 %) is achieved at PCS and IMT-2000 frequency band. The studied antenna can be designed easily for extension of away because it has simple structure.

A Broadband Microstrip Array Antenna for PCS/IMT-2000 Base-Station (PCS/IMT-2000 기지국용 광대역 마이크로스트립 배열 안테나)

  • 김태우;최재훈
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.26 no.11B
    • /
    • pp.1620-1627
    • /
    • 2001
  • In this paper, a broadband microstrip antenna for PCS and IMT-2000 service is designed. To obtain the broadband characteristics of an antenna, we utilized the multi-layered structure composed of two foam material layers, parasitic element and aperture coupled feeding network. The broadband characteristic is obtained by changing the size of parasitic element and the height of foam materials. In addition to that, the usage of metal layer at the distance of λ/4 from feed-line, back radiation is reduced. The bandwidth of a single element for VSWR less than 1.3 is about 550MHz. The bandwidth of a designed 1$\times$4 array antenna for VSWR less than 1.3 is about 460MHz. The gain of a designed array antenna is about 11.15∼12.15dBi and the front-to-back ratio is about 30dB.

  • PDF

A sudy on the Out-of-band Noise Power for PCS Unified Repeater (PCS 통합중계기의 대역외 잡음에 관한 연구)

  • 황선호;김훈석
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2002.05a
    • /
    • pp.359-362
    • /
    • 2002
  • The increase in the number of PCS base station and repeater has increased the level of interference between PCS carriers. In this paper, interference of singular PCS repeater out-of-band noise power on mobile phone is analysed and compared with that of unified PCS repeater for multiple PCS carriers. It is shown that unified PCS repeater provide about 2∼3dB signal gain in comparison with conventional PCS repeater. As a result, the interference of out-of-band noise power on mobile phone is reduced. It is expected that PCS carriers are able to build an environmentally-friendly communications infrastructure and reduce the cost by using unified PCS revealer and apply it for the deployment of IMT-2000 network.

  • PDF

Users Participation in IMT-2000 Standardization upon Phased Standards Strategy

  • Myung, Jong-Wook
    • Proceedings of the Korea Technology Innovation Society Conference
    • /
    • 1998.05a
    • /
    • pp.22-22
    • /
    • 1998
  • This paper reviews the benefits of users participation in IMT-2000 standardization by the creation of users coalitions, focusing in particular on phased standards strategy necessary for the evolutionary approach from second generation to third generation systems. It first presents in detail the current status of IMT-2000 standardization progress occurring at each regional standard body including TIA of US, ETSI of Europe, TTA of Korea and ARIB of Japan. With this clear understanding of standardization situations worldwide, we may be able to come up with our standards strategies related to IPR issues and efficient standard-setting mechanism between manufacturers and service providers. In addition, this paper addresses the necessity for phased licensing of IMT-2000 service in order to avoid the high cost of new infrastructures and ensure an acceptable financial investment returns for existing cellular and PCS service providers. An author hopes that this paper can provide the adequate standardization directions of IMT-2000 to satisfy the varying regional and global market requirements.

  • PDF

Analysis of Multi-Current Distributed Broadband Printed Monopole Antenna (다중 전류 분포 광대역 평면형 모노폴 안테나 해석)

  • Jeon, Sung-Keun;Kim, Nam;Lee, Seung-Woo;Rhee, Seung-Yeup;Park, Ji-Chang
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.19 no.11
    • /
    • pp.1233-1239
    • /
    • 2008
  • In this paper we proposed a novel broadband printed monopole antenna for PCS/IMT-2000/WLAN terminals by widening current flow To compensate narrow bandwidth characteristics which is one of disadvantages of general printed monopole antenna, we add the patch of diamond shape and induce the current in various directions for acquiring broadband characteristics. And frequency characteristics is optimized with Various design parameters. The bandwidth of the realized antenna is $1.66{\sim}3.04\;GHz$(58.72 %) below the return loss of -10 dB which contain the required band-width of PCS/IMT-2000/WLAN band.

A Dual-Sprial Line Loaded Monopole Antenna having a Vertical Groundplane for Quadband Applications (수직 접지면을 가지는 4중 대역용 이중 스파이럴 라인 로디드 모노폴 안테나)

  • Kim, Byoung-Chul;Nguyen, Truong Khang;Choo, Ho-Sung;Park, Ik-Mo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.19 no.8
    • /
    • pp.899-905
    • /
    • 2008
  • In this paper, we propose a dual-spiral line loaded monopole antenna having a vertical ground plane for quadband applications. The antenna occupies a volume of $38{\times}12{\times}7\;mm^3$ with a $40{\times}92\;mm^2$ ground plane. The measured impedance bandwidths of the antenna based on $VSWR{\le}2$ are approximately of 11.7 % and 24.8 % in the first and second frequency band, respectively. The operating frequency can simultaneously cover Cellular($0.824{\sim}0.894\;GHz$), PCS($1.750{\sim}1.870\;MHz$), UMTS($1.920{\sim}2.170\;MHz$), and IMT-2000($1.885{\sim}2.200\;GHz$) bands. The maximum gains of the antenna are -0.99 dBi, 4.07 dBi, 2.72 dBi, and 4.33 dBi at the center frequencies of the Cellular, PCS, UMTS, and IMT-2000 bands, respectively. Good radiation patterns are experimentally obtained.

The Design and SAR Analysis of the Broadband Printed Monopole Antenna with Z-patch (Z자형 패치를 갖는 광대역 평판형 모노폴 안테나 설계 및 SAR 해석)

  • Lee, Ho-Min;Lee, Seung-Woo;Kim, Nam
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.18 no.12
    • /
    • pp.1391-1401
    • /
    • 2007
  • This paper proposed a novel broadband printed monopole antenna for PCS/IMT-2000/WLAN terminals. Frequency characteristics are optimized with various design parameters. Two Z-shaped patchs were utilized in order to improve the characteristics of a printed monopole antenna which usually has a narrow bandwidth. The bandwidth of the realized antenna is $1.590{\sim}2.614$ GHz(48.43 %) below the return loss of -10 dB which contain the required bandwidth of PCS/IMT-2000/WLAN band. The simulated and measured values of 1 g and 10 g averaged peak SAR on human head caused by the proposed antenna on folder-type phone were analyzed and discussed. As a result, the measured 1 g peak SAR value is 0.794 W/kg and 10 g peak SAR value is 0.368 W/kg at 1.8 GHz. The results are smaller than the reference SAR limit values that are respectively 1.6 W/kg and 2 W/kg on 1 g and 10 g averaged SAR values.