• Title/Summary/Keyword: Vlade

Search Result 2, Processing Time 0.016 seconds

Vlade Hybrid Antenna for the Mobile Phone Handset Terminal (휴대용 단말기를 위한 블레이드 하이브리드 안테나)

  • Oh, Kyu-Jong;Son, Tae-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.11 no.4
    • /
    • pp.165-169
    • /
    • 2011
  • In recent years mobile phone handset terminal has tended to have additional various functions and slim and light weight, and its internal space is getting smaller and narrower. According to complex parts, small and narrow inner space is caused not sufficient bandwidth and lower impedance. Moreover, additional polarization loss by the surrounding parts produces is lower effectiveness and increases difficulties for getting the antenna gain. For IFA is low profile structure based on the ILA(Inverted L Antenna) which is transformed from the monopole antenna. While this antenna has lots of advantages in internal antenna of mobile phone, it has some disadvantage of reduced bandwidth and gains compared with monopole antenna. In this paper, propose vlade hybrid antenna use for the coupling structure.

Hybrid MIMO Antenna for the Mobile Handset (휴대 단말기용 하이브리드 MIMO 안테나)

  • Son, Taeho
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.12 no.3
    • /
    • pp.78-86
    • /
    • 2013
  • A hybrid MIMO(Multi Input Multi Output) antenna which is operating both a monopole and a IFA(Inverted F Antenna) is designed. It's applied Vlade(Vertical lade) technique to reduce antenna space, and a diagonally fed MIMO antenna is designed on the bare board for the data communication. Return losses due to variables of antenna length are simulated for the design. Antenna for the hexa-frequency band of LTE700, CDMA, GSM, DCS, PCS and WCDMA is designed and implemented. This antenna is satisfied 3:1 VSWR over the whole design band by the measurement of return loss. And average gains and efficiencies were -3.67 ~ -2.53dBi and 42.06 ~ 55.84% for LTE700/CDMA/GSM frequency band, -3.27 ~ -1.21dBi and 47.08 ~ 75.6% for DCS/PCS/WCDMA frequency band. The isolation between 2 antenna that is one of important factors for the MIMO system was measured good performance as -8.14 ~ -25.77dB over the whole service band.