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Vertically Half Disc-Loaded Ultrawideband Monopole Antenna (VHDMA) with Horizontally Top-Loaded Small Disc  

이재욱 (한국항공대학교 항공전자 및 정보통신공학부)
조춘식 (한국항공대학교 항공전자 및 정보통신공학부)
김종면 (한국전자통신연구원 디지털방송연구단)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.11, 2004 , pp. 1051-1061 More about this Journal
Abstract
In this Paper, a new antenna(VHMDA) characteristics of half-circular/elliptical disc-loaded planar antennas with horizontally top-loaded small disc is studied by simulation and measurements with additional resonant structure. The transfer function characteristics of Gaussian pulse from the designed UWB transmitter antenna has been investigated. The radiation pattern of the proposed antenna in azimuth is nearly omni-directional response, which is usulally required in conventional monopole antenna. In addition to that, the simulation and measured results show that the return loss characteristics of VHDMA covers considerably large bandwidth with small area. From the measured results of the circular and half-circular disc-loaded monopole antennas with small disc mounted on the top, it is found that the half disc-loaded monopole antenna with additional structure can be comparable to the circular disc-loaded monopole antenna in respect o( size and electrical performances. Surface wave and dielectric losses often caused by the printed antenna using high dielectric constant does not occur in metallic planar antenna with good impedance matching and without lossy matching unit. This structure implies that the performance of return loss is directly related with the radiation efficiency.
Keywords
Half Disc; Ultrawideband; Monopole;
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