TY - JOUR
T1 - Frequency agility of broadband antennas integrated with a reconfigurable RF impedance tuner
AU - Zhou, Zhen
AU - Melde, Kathleen L.
N1 - Funding Information:
Manuscript received October 13, 2006; revised January 12, 2007. This work was supported in part by the National Science Foundation by Grant EEC-0333046. The authors are with the University of Arizona, Tucson, AZ 85721 USA (e-mail: [email protected]; [email protected]). Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LAWP.2007.891955
PY - 2007
Y1 - 2007
N2 - This letter demonstrates the frequency agility that can be achieved when a broadband antenna is integrated with a reconfigurable RF tuner as an impedance matching circuit. The reconfigurable tuner uses a microstrip loaded line structure with four stubs that are each terminated by a varactor diode. The spectral response can be varied by changing the capacitance of the diodes. Input impedance data obtained from measurements on commercially available antennas were used in an Agilent Advanced Design System (ADS) model of the four-stub tuner. The results show that adding the reconfigurable tuner can facilitate excellent frequency agility of the return loss of the broadband antenna over several narrow frequency sub bands.
AB - This letter demonstrates the frequency agility that can be achieved when a broadband antenna is integrated with a reconfigurable RF tuner as an impedance matching circuit. The reconfigurable tuner uses a microstrip loaded line structure with four stubs that are each terminated by a varactor diode. The spectral response can be varied by changing the capacitance of the diodes. Input impedance data obtained from measurements on commercially available antennas were used in an Agilent Advanced Design System (ADS) model of the four-stub tuner. The results show that adding the reconfigurable tuner can facilitate excellent frequency agility of the return loss of the broadband antenna over several narrow frequency sub bands.
KW - Frequency agile antennas
KW - Intelligent RF front ends
KW - Reconfigurable tuner
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U2 - 10.1109/LAWP.2007.891955
DO - 10.1109/LAWP.2007.891955
M3 - Article
AN - SCOPUS:33947408318
SN - 1536-1225
VL - 6
SP - 56
EP - 59
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
ER -