Title :
Frequency agile monopole antenna using a reconfigurable bandpass filter
Author :
Pei-Yuan Qin ; Guo, Y. Jay ; Feng Wei
Author_Institution :
Div. of Comput. Inf., Commonwealth Sci. & Ind. Res. Organ. (CSIRO), Sydney, NSW, Australia
Abstract :
A novel microstrip monopole antenna with a reconfigurable -10 dB impedance bandwidth is proposed in this paper for cognitive radios. The antenna is fed by a microstrip line integrated with a stub coupled multiple-mode-resonator (MMR) filter. The reconfiguration of the filter makes the circular disc monopole antenna operate at either a wideband state from 3.8 to 6.9 GHz or a narrowband state by using a PIN diode. For the narrowband state, two varactor diodes are employed to change the antenna operating frequency from 4.3 to 6.6 GHz with a minimum 40 MHz bandwidth. Preliminary simulated results on input reflection coefficients for different states of the antenna are discussed in the paper.
Keywords :
band-pass filters; cognitive radio; microstrip antennas; microstrip lines; microwave antennas; monopole antennas; p-i-n diodes; resonator filters; varactors; PIN diode; bandwidth 40 MHz; circular disc monopole antenna; cognitive radios; frequency 3.8 GHz to 6.9 GHz; input reflection coefficients; microstrip line; microstrip monopole antenna; reconfigurable bandpass filter; stub coupled MMR filter; stub coupled multiple-mode-resonator filter; varactor diodes; Band-pass filters; Broadband antennas; Cognitive radio; Impedance; Narrowband; Wideband;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE
Conference_Location :
Memphis, TN
Print_ISBN :
978-1-4799-3538-3
DOI :
10.1109/APS.2014.6904952
