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Integrated Ferroelectrics
An International Journal
Volume 192, 2018 - Issue 1
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Articles

Microwave power detection using ferroelectric thin film varactors

, , , &
Pages 1-9 | Received 31 May 2017, Accepted 30 Aug 2018, Published online: 26 Feb 2019
 

Abstract

Ferroelectric, barium strontium titanate thin film varactors have been used to rectify and detect microwave signals with frequencies ranging from 2 GHz to 3 GHz. Anharmonic dipolar resonant frequencies from these thin fims were shown to have strong dependence on film thickness with some amount of voltage-controlled tunability. Experiments were performed using lock-in detection of a 100% amplitude modulated microwave signal with varying power levels. An on-resonant sensitivity of 0.6 mV/mW was observed. Power detection sensitivity was shown to have built-in bandpass filtering resulting from resonant line shape.

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