Low Dielectric Polyimide Aerogels As Substrates for Lightweight Patch Antennas

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• 作者：Mary Ann B. Meador ; Sarah Wright ; Anna Sandberg ; Baochau N. Nguyen ; Frederick W. Van Keuls ; Carl H. Mueller ; Rafael Rodr铆guez-Sol铆s ; F茅lix A. Miranda
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：November 28, 2012
• 年：2012
• 卷：4
• 期：11
• 页码：6346-6353
• 全文大小：510K
• 年卷期：v.4,no.11(November 28, 2012)
• ISSN：1944-8252

文摘

The dielectric properties and loss tangents of low-density polyimide aerogels have been characterized at various frequencies. Relative dielectric constants as low as 1.16 were measured for polyimide aerogels made from 2,2鈥?dimethylbenzidine (DMBZ) and biphenyl 3,3鈥?4,4鈥?tetracarbozylic dianhydride (BPDA) cross-linked with 1,3,5-triaminophenoxybenzene (TAB). This formulation was used as the substrate to fabricate and test prototype microstrip patch antennas and benchmark against state of practice commercial antenna substrates. The polyimide aerogel antennas exhibited broader bandwidth, higher gain, and lower mass than the antennas made using commercial substrates. These are very encouraging results, which support the potential advantages of the polyimide aerogel-based antennas for aerospace applications.

Keywords:

aerogels; polyimides; low dielectric; antennas; mesoporous