DIELECTRIC POLYMER BASED TUNABLE BAND PASS FILTER FOR RF MEMS APPLICATIONS

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Year : 2026 | Volume : 14 | 01 | Page :
    By

    G.V. Ganesh,

  • Nagandla Prasad,

  • Pokkunuri Pardhasaradhi,

  • Devarapu Santosh,

  1. Associate Professor, Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Andhra Pradesh, India
  2. Assistant Professor, Department of Electronics and Communication Engineering, GMR Institute of Technology, Rajam, Andhra Pradesh, India
  3. Professor, Department of Independent Research and Development and Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Andhra Pradesh, India
  4. Research Scholar, Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Andhra Pradesh, India

Abstract

In this paper, we report on the design, modeling, and analysis of a tunable bandpass filter implemented in a coplanar waveguide (CPW) configuration, where a distributed MEMS transmission line (DMTL) is integrated with dielectric polymer layers to achieve dynamic frequency and bandwidth reconfigurability. The proposed filter architecture leverages the tunable dielectric response of polymer films, enabling precise control of the center frequency and passband width under applied electrostatic bias. Comprehensive parametric studies were conducted on polymer characteristics—including dielectric constant, material selection, film thickness, surface uniformity, and air-gap geometry—to optimize capacitance variation, minimize actuation voltage, and maintain consistent RF stability. Electromagnetic simulations validated that the dielectric polymer integration allows center frequency tuning from 0.2 to 1 GHz, bandwidth reconfiguration of approximately 0.7 GHz, and superior microwave performance, characterized by a return loss of –22.5 dB and insertion loss near –3 dB. The fabrication process is compatible with low-temperature processing and flexible substrates, offering excellent scalability for compact and conformal microwave systems. Owing to its reconfigurable nature and reliable performance, the proposed dielectric polymer–based RF MEMS bandpass filter holds significant potential for next-generation UHF, radar, and consumer wireless communication applications.

Keywords: Dielectric polymers, Distributed MEMS transmission layer, MEMS switches, RF transmission, coplanar waveguide (CPW), Reconfigurability, Parametric studies, Electromagnetic simulations.

How to cite this article:
G.V. Ganesh, Nagandla Prasad, Pokkunuri Pardhasaradhi, Devarapu Santosh. DIELECTRIC POLYMER BASED TUNABLE BAND PASS FILTER FOR RF MEMS APPLICATIONS. Journal of Polymer & Composites. 2026; 14(01):-.
How to cite this URL:
G.V. Ganesh, Nagandla Prasad, Pokkunuri Pardhasaradhi, Devarapu Santosh. DIELECTRIC POLYMER BASED TUNABLE BAND PASS FILTER FOR RF MEMS APPLICATIONS. Journal of Polymer & Composites. 2026; 14(01):-. Available from: https://journals.stmjournals.com/jopc/article=2026/view=237673


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Ahead of Print Subscription Original Research
Volume 14
01
Received 06/11/2025
Accepted 19/01/2026
Published 26/02/2026
Publication Time 112 Days
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