Title :
Asymmetrical wideband zeroth-order resonant antenna
Author :
Amani, N. ; Jafargholi, A. ; Kamyab, M. ; Vaziri, Ashkan
Author_Institution :
Fac. of Electr. & Comput. Eng., K.N. Toosi Univ. of Technol., Tehran, Iran
Abstract :
A new asymmetrical zeroth-order resonant antenna with improved efficiency and widened impedance bandwidth is proposed. It comprises a rectangular patch, two shorted stubs and a coplanar waveguide feed to have composite right/left-handed features and an easy fabrication process. The asymmetry helps to combine three resonance frequencies and extends the bandwidth up to 61.6%. The efficiency of the proposed antenna is >85% over the entire bandwidth of 4.41-8.34 GHz. The proposed antenna has a compact size, which can provide an omni-directional radiation pattern suitable for wireless applications. These features are verified by CST Microwave Studio and compared with the experimental results.
Keywords :
antenna feeds; antenna radiation patterns; broadband antennas; coplanar waveguides; microstrip antennas; microwave antennas; omnidirectional antennas; rectangular waveguides; CST Microwave Studio; antenna feed; asymmetrical wideband zeroth-order resonant antenna; bandwidth 4.41 GHz to 8.34 GHz; composite right-left-handed feature; coplanar waveguide; impedance bandwidth; omnidirectional radiation pattern; rectangular patch antenna; wireless application;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.3295
