The development of a multi-notch ultra-wideband (UWB) planar antenna based on a circular metallic patch fed by a coplanar waveguide (CPW) is of particular interest. The antenna has a wideband response with a steady radiation pattern and impedance bandwidth in the frequency range of 2.5 to 12 GHz. The multi-mode electric ring resonator (ERR) is utilised to achieve the band-notched properties of the planar UWB antenna. The ERR is installed beneath the antenna's CPW construction. The size of the ERR structure are changed to tune each of the notched frequency bands. At 3.5, 5.8, and 7.5 GHz, the UWB antenna exhibits multi-notch features in the 2.5–12 GHz frequency spectrum. Variable capacitors, rather than ERR quasi-lumped capacitances, are used to offer reconfigurability of the notched band. A circular metallic patch antenna fed by a microstrip transmission line could be utilised as an alternative. A complementary inductance-capacitance (C-ELC) resonator in the ground plane of the microstrip line provides the notch in this case. The notch frequency is determined by the C-ELC resonator's size.
Author (S) Details
Irina B. Vendik
Department of Microelectronics and Radio Engineering, St. Petersburg Electrotechnical University, St. Petersburg, Russia.
Alexander S. Rusakov
Department of Microelectronics and Radio Engineering, St. Petersburg Electrotechnical University, St. Petersburg, Russia.
Komsan Kanjanasit
College of Computing Prince of Songkla University Phuket Campus, Thailand.
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