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ABSTRACT
A novel planar switchable antenna with a band-notched and multi-resonance performance is proposed. In order to generate single band-notched characteristics, a parasitic element with attaching two stubs is applied. Furthermore, to achieve a switchable function, only one PIN diode is used across a semicircular radiator patch and the parasitic element. When the PIN diode is biased forwardly, the semicircular patch transforms to a circular patch, and an additional resonance is excited at the notch frequency. Additionally, by attaching two L- and T-shaped stubs and cutting a rectangular slit on the radiating patch, new additional resonances are excited, and hence wider impedance bandwidth can be produced. The presented antenna has a compact size of 19.5 × 17 mm2, equal to 0.2 λ0 × 0.17 λ0 (λ0 is the free-space wavelength at 3.1 GHz). The experimental and simulated results show that the antenna has a good radiation behavior within the ultra-wideband frequency range (3.08 to over 14 GHz) and reconfigurable frequency band-notched function in the range of wireless local area network and dedicated short-range communication signals (4.87–6.08 GHz). It is shown that there is virtually no change in the antenna's E-plane and H-plane radiation patterns for the various PIN diode switching conditions, especially at low frequencies.
DISCLOSURE STATEMENT
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Vahid Sharbati
Vahid Sharbati was born in Gorgan, Iran, in 1986. He received the BS degree in electronic engineering from the Hadaf Institute of Higher Education, Sari, Iran, in 2009. Currently, he is working toward the MS degree in communication engineering from Semnan University. His current research interest is reconfigurable microstrip antenna for cognitive radio applications.
E-mail: [email protected]
Pejman Rezaei
Pejman Rezaei was born in Tehran, Iran, in 1977. He received the BS degree in communication engineering from Communication Faculty, Tehran, Iran, in 2000, and the MS and PhD degrees from Tarbiat Modarres University, Tehran, Iran, in 2002 and 2007, respectively. His current research interests are electromagnetics theory, antenna, wave propagation, and satellite communication. Currently, he is an assistant professor in Semnan University, Semnan, Iran.
E-mail: [email protected]
Mohammad M. Fakharian
Mohammad M. Fakharian was born in Tehran, Iran, in 1987. He received the BS and MS degrees in electrical engineering from Semnan University, Semnan, Iran, in 2009 and 2012, respectively. Currently, he is working toward the PhD degree in communication engineering from Semnan University. His research interests include low-profile printed and patch antennas for wireless communication, fractal, miniature and multiband antennas, meta-materials and EBG structures interaction with antennas and RF passive components, reconfigurable antennas, and electromagnetic theory: numerical methods and optimization techniques.
E-mail: [email protected]