A 67 dBm Multistacked Junction Varactor

A multistacked varactor is presented for ultra-linear tunable radio frequency applications. The varactor elements are applied in anti-series configuration and are characterized by an "exponential" C-V@@dR@ relationship. Third-order intermodulation (IM@@d3@) is cancelled through proper harm...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2008-11, Vol.18 (11), p.749-751
Main Authors: Huang, Cong, Buisman, Koen, Nanver, Lis K., Sarubbi, Francesco, Popadic, Milos, Scholtes, Tom L. M., Schellevis, Hugo, Larson, Lawrence E., de Vreede, Leo C. N.
Format: Article
Language:English
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Summary:A multistacked varactor is presented for ultra-linear tunable radio frequency applications. The varactor elements are applied in anti-series configuration and are characterized by an "exponential" C-V@@dR@ relationship. Third-order intermodulation (IM@@d3@) is cancelled through proper harmonic loading of the terminals of the anti-series configuration. Multiple stacking is used to further increase the power handling and to minimize the remaining fifth-order distortion. The measured output intercept point (OIP@@d3@) at 2 GHz is > 67 dBm for modulated signals up to 10 MHz bandwidth, while providing a capacitance tuning ratio of 3:1 with an average quality factor of 40 and maximum control voltage of 10 V.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2008.2005234