Elsevier

Synthetic Metals

Volume 85, Issues 1–3, 15 March 1997, Pages 1439-1440
Synthetic Metals

A microwave shutter using conductive polymers

https://doi.org/10.1016/S0379-6779(97)80309-8Get rights and content

Abstract

An all solid state electrochromic shutter was made incorporating a conductive polymer to modulate the microwave energy. The active polymer layer was polyaniline doped with camphorsulfonic acid which was switched between its conductive and insulting state using Li+ as the mobile ion and LixMn2O4 as the counter electrode. Changes in the transmission and reflection of X-band microwave energy were measured as a function of time and bias applied between the electrodes. With switching voltages up to ± 3 V modulation of nearly 10 dB was obtained in 10 minutes, but the cycle lifetime was limited.

References (6)

  • L. Olmedo et al.

    Synth. Met.

    (1995)
  • J. Joo et al.

    Synth. Met.

    (1995)
  • A. Kaynak et al.

    Mat. Res. Bull.

    (1993)
There are more references available in the full text version of this article.

Cited by (73)

  • Multifunctional magneto-polymer matrix composites for electromagnetic interference suppression, sensors and actuators

    2021, Progress in Materials Science
    Citation Excerpt :

    Like metals, charge is carried in ICPs via free electrons, however, unlike metals, their conduction behavior can be controlled by redox doping/re-doping processes [121]. This attribute is attractive as it offers a possibility to tailor the conductivity of an ICP by altering the oxidation state as demonstrated in a solid state microwave switch [122]. In combination with a magnetic phase, this attribute offers promise toward tailorable EMI in FR-MPCs, permitting control over the proportion of EM reflection and absorption by the material.

  • Electroactive (A<inf>3</inf>+B<inf>2</inf>)-type hyperbranched polyimides with highly stable and multistage electrochromic behaviors

    2017, Electrochimica Acta
    Citation Excerpt :

    Early studies of electrochromic materials mainly focused on the change of visible light. Recently, the field of modulation of near-infrared light has also received great attention, and the NIR electrochromism is desirable for thermal control in buildings or spacecraft, data storage and optic-fiber communication [15–17]. Various materials including conjugated polymers, cyclometalated complexes, composites of transition metal oxide (TMO)-nanocrystal and derivatives with p-phenylenediamine structures have been exploited as NIR electrochromic materials [18–26].

View all citing articles on Scopus
View full text