KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Kosulvit, SompolSubject: search.filters.subject.circular ring

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Exponential horn antenna excited by circular ring for bridging outdoor wireless LAN applications
    (2017-12-19)
    Wounchoum, Phairote
    ;
    Wongsiritorn, Pitchanun
    ;
    Kosulvit, Sompol
    ;
    Phongcharoenpanich, Chuwong
    In this paper, a circular ring is used to excite exponential horn antenna presented for bridging outdoor wireless LAN applications. The advantage of this structure does not require a waveguide feeding system. The purpose of this antenna design is to achieve unidirectional antenna which is operated at the center frequency of 2.45 GHz (2.40 GHz to 2.484 GHz). The characteristics of the proposed antenna such as S<inf>11</inf>, radiation pattern and gain are also demonstrated. The results show that the antenna have given a high gain of 14.6 dBi and S<sup>11</sup> less than-30 dB at the center frequency. The proposed antenna is very useful for bridging outdoor WLAN systems.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    A dual-band unidirectional antenna using a hemispherical monopole with circular reflector
    (2011-12-01)
    Nuangwongsa, Kanawat
    ;
    Phongcharoenpanich, Chuwong
    ;
    Kosulvit, Sompol
    This paper presents a unidirectional antenna using a hemispherical monopole with circular reflector for dual-band wireless communication applications. It consists of a hemispherical monopole with a sheet of stub. The stub is placed over a hemispherical monopole for low frequency band operation. The radiation patterns are controlled by circular reflector together with circular ring and rectangular ring. At 2.4 GHz, the antenna radiates by a sheet of stub and a hemispherical monopole with rectangular ring. At 5.8 GHz, it radiates by a hemispherical monopole with circular ring. The proposed antenna is designed to operate between 2.4-2.5 GHz and 5.15-5.85 GHz with S11 < 10 dB. The antenna has high gain and the radiation pattern at both bands are unidirectional beam. The simulated and measured results are presented. © 2011 IEEE.