Title :
Planar monopole antenna with dual frequency for UWB system
Author :
Rikuta, Yuko ; Kohno, Ryuji
Author_Institution :
Commun. Res. Lab., Yokosuka Radio Commun. Res. Center, Japan
Abstract :
For an ultra-wideband (UWB) system, the antenna with wide bandwidth able to cover from 3.1 to 10.6 GHz is required. It has been already proposed several types of wideband antennas which cover whole frequency range. On the other hand, since UWB system covers from 3.1 to 10.6 GHz, it is necessary to suppress the interference from other systems using some of frequency band in 3.1-10.6 GHz. In this paper, the novel planar monopole antenna, which consists of two connected rectangular plates, is presented. The return loss characteristics, radiation pattern, and current distribution of the antenna are simulated by the FDTD method. The proposed planar monopole antenna´s structure has dual frequency and broad bandwidth at both resonant frequencies. The return loss level at the eliminated frequency between both resonant frequencies is almost O dB. The radiation patterns at each resonant frequency are almost omni-directional. The current distributions at each frequency are similar to that of planar rectangular monopole, so the radiation patterns become omni-direction in horizontal plane at each resonant frequency. Therefore, wide bandwidth characteristics can be achieved.
Keywords :
antenna radiation patterns; broadband antennas; current distribution; finite difference time-domain analysis; interference suppression; microwave antennas; monopole antennas; multifrequency antennas; radio networks; 3.1 to 10.6 GHz; FDTD method; UWB system; antenna current distribution; antenna radiation pattern; antenna return loss characteristic; dual frequency antenna; finite difference time domain method; interference suppression; planar monopole antenna; resonant frequencies; ultrawideband system; wideband antenna; Antenna radiation patterns; Bandwidth; Broadband antennas; Current distribution; Dipole antennas; Finite difference methods; Interference suppression; Loaded antennas; Resonant frequency; Ultra wideband antennas;
Conference_Titel :
Ultra Wideband Systems and Technologies, 2003 IEEE Conference on
Print_ISBN :
0-7803-8187-4
DOI :
10.1109/UWBST.2003.1267827