Title :
A comparison between different cognitive radio antenna systems
Author :
Tawk, Y. ; Jayaweera, S.K. ; Christodoulou, C.G. ; Costantine, J.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of New Mexico, Albuquerque, NM, USA
Abstract :
This paper presents different reconfigurable antenna systems for a cognitive radio environment. Mainly, two different schemes are discussed. The first one is based on detecting the unused frequency bands via an ultra-wideband (UWB) antenna and tuning the reconfigurable antenna operation correspondingly. The second scheme is based on performing transmission via a UWB antenna while producing notch frequencies to minimize interference between the cognitive radio users. The use of reconfigurable filters within the antenna structure for both schemes is also highlighted. A comparison between both schemes is finally presented and discussed.
Keywords :
cognitive radio; filters; interference suppression; radiofrequency interference; tuning; ultra wideband antennas; UWB antenna; antenna tuning; cognitive radio antenna systems; cognitive radio users; interference minimization; notch frequencies; reconfigurable antenna systems; reconfigurable filters; ultrawideband antenna; unused-frequency band detection; Microstrip antennas; Substrates; Switches; Transmitting antennas; Tuning; Ultra wideband antennas; UWB; band-pass; band-stop; channel sensing; cognitive radio; filter; reconfigurable antenna;
Conference_Titel :
Intelligent Signal Processing and Communications Systems (ISPACS), 2011 International Symposium on
Conference_Location :
Chiang Mai
Print_ISBN :
978-1-4577-2165-6
DOI :
10.1109/ISPACS.2011.6146216
