Enhancing Linearity in Parallel-Plate MEMS Varactors through Repulsive Actuation

Autor: Roufaida Bensalem, Mohannad Y. Elsayed, Hani H. Tawfik, Frederic Nabki, Mourad N. El-Gamal
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Micro, Vol 3, Iss 4, Pp 811-821 (2023)
Druh dokumentu: article
ISSN: 2673-8023
DOI: 10.3390/micro3040057
Popis: This paper presents a new MEMS varactor that uses repulsive actuation to achieve an ultra-linear capacitance-to-voltage response. The approach proposed involves actuating the moveable electrode away from the fixed electrode, instead of the conventional closing-the-gap direction. This increasing-gap movement reduces the capacitance as the actuation voltage increases. The MEMS variable capacitor is fabricated using PolyMUMPs technology and exhibits an excellent linearity factor of 99.7% in capacitance-to-voltage response, and a capacitance tuning ratio of 11× was achieved. The proposed strategy will enable the development of high-performance MEMS-based tunable devices for various applications.
Databáze: Directory of Open Access Journals