A Varactor-Based Variable Attenuator Design with Enhanced Linearity Performance
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AbstractThis paper presents, for the first time, the linearity study of a varactor-based microwave attenuator. In particular, a novel technique is proposed to linearize the attenuator in terms of both main-tone and intermodulation distortion (IMD) performance. The enhancement circuit is simple to implement and can offer a reduction of the IMD level of over 20 dB. Linearization is achieved by shifting the biasing point of the tuning diodes (under large attenuation operation) away from the highly nonlinear region. For verification, both simulated and measured results of a 1-GHz variable attenuator with and without linearization are given.
All Author(s) ListCheng K.-K.M., Chik M.-C.J.
Journal nameIEEE Transactions on Microwave Theory and Techniques
Volume Number63
Issue Number10
PublisherInstitute of Electrical and Electronics Engineers
Place of PublicationUnited States
Pages3191 - 3198
LanguagesEnglish-United Kingdom
KeywordsIntermodulation distortion (IMD), linearity, linearization, tuning diodes, varactor, variable attenuator

Last updated on 2020-24-11 at 01:16