Department: Center for Wireless Communications (CWC)
Name: Mohammed A El-Tanani
Email: meltanan @ ucsd.edu
Grad Year: 2009
Tunable frequency filters are often used as tracking filters for multiband telecommunication systems, radiometers, and wideband radar systems. Since the same filter tunes for the different frequency ranges, this reduces the system size and complexity. However, since they are placed between the antenna and the low-noise amplifier, they must exhibit very low loss and high linearity, especially in today crowded RF environments. In this poster, A highly linear varactor-based tunable filter has been realized for the 1.6-2.1 GHz frequency band. The measured IIP3 is 25dBm and 35dBm at 4V and 30V respectively. The measured 1-dB compression point is 18dBm, and above 30dBm 4V 30V respectively. The measured insertion loss was better than 3dB and is 1.7dB at 2.1 GHz. The filter also has 2-zeros which also tune as the center frequency tunes.
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