Layout Optimization of Small-Size Ferroelectric Parallel-Plate Varactors
Artikel i vetenskaplig tidskrift, 2010

The extremely high permittivity of ferroelectric varactors (typically epsilon(r) >) imposes specific design and fabrication constraints for microwave and millimeter-wave applications. In this paper, small-size parallel-plate ferroelectric varactors insensitive to fabrication misalignment tolerances are studied experimentally. It is shown that the total resistance of the varactors strongly depends on the shape factor of the plates. Moreover, due to the small sizes of the varactors, the interconnecting strips become narrow and their contribution to the total resistance dominates. A simple procedure for optimization of the shape factor to minimize the varactor resistance is proposed.

thin-films

layout optimization

passive circuits

microwave

capacitors

devices

Ferroelectric capacitors

Författare

Martin Norling

Chalmers, Teknisk fysik, Fysikalisk elektronik

Dan Kuylenstierna

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Andrei Vorobiev

Chalmers, Teknisk fysik, Fysikalisk elektronik

Spartak Gevorgian

Chalmers, Teknisk fysik, Fysikalisk elektronik

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 58 1475-1484

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Materialvetenskap

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialteknik

Fysik

Elektroteknik och elektronik

Fundament

Grundläggande vetenskaper

DOI

10.1109/TMTT.2010.2047915