Microwave dielectric properties of marine DNA based polymers

✍ Scribed by Guru Subramanyam; Emily Heckman; James Grote; Frank Hopkins; Robert Neidhard; Edward Nykiel

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 144 KB
• Volume: 46
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20965

✦ Synopsis

Abstract

Deoxyribonucleic acid (DNA)‐based polymer thin‐films are characterized at microwave frequencies. The dielectric properties of the films are extracted from comparison of the propagation constants of the co‐planar waveguide (CPW) lines on bare MgO substrates and the DNA‐based films on MgO substrates. The insertion loss introduced by an undoped DNA‐based polymer film is only 0.1 dB at 10 GHz and 0.5 dB at 30 GHz. A red‐dye‐doped DNA polymer film exhibited higher losses. The relative dielectric constant of the undoped DNA‐based film averages to 4 at microwave frequencies, and the loss‐tangent is below 0.1 up to 30 GHz. The dielectric properties of a 5% red‐dye‐doped DNA polymer film is compared to that of the pure DNA film. The DR1 doped DNA film exhibits 0.4‐dB higher loss at 10 GHz and 0.9‐dB higher loss at 30 GHz. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 278–282, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20965