naa a22 4500 510800475 CHVBK 20180411083353.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11664-012-2273-5 doi (NATIONALLICENCE)springer-10.1007/s11664-012-2273-5 New Optically Controlled Frequency-Agile Microstrip Antenna [Elektronische Daten] [Nasrin Ehteshami, Vahid Sathi] A novel class of microstrip antennas composed of organic semiconductor polymer [poly(3-hexylthiophene) (P3HT)] is proposed for frequency sweeping applications. The permittivity of the P3HT film is measured using the reflective coaxial method for illuminated and nonilluminated states. Resonant frequencies of the proposed antennas instantly change on changing the optical illumination intensity from an adjustable white-light source. Two different antenna configurations (square and square ring) are designed and tested experimentally. The square ring antenna is able to sweep a broader frequency band (1.5GHz). The gain and radiation efficiency of the proposed square antenna are compared with the corresponding copper microstrip antenna. The proposed antennas have acceptable resonant and radiation characteristics, albeit with modest radiation efficiency. TMS, 2012 Frequency-agile microstrip antenna nationallicence optically controlled antenna nationallicence multifrequency operation nationallicence organic semiconductor polymer nationallicence Ehteshami Nasrin Department of Electrical Engineering, Islamic Azad University, Tabriz Branch, Tabriz, Iran aut Sathi Vahid Department of Electrical Engineering, Islamic Azad University, Tabriz Branch, Tabriz, Iran aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/1(2013-01-01), 162-167 0361-5235 42:1<162 2013 42 11664 https://doi.org/10.1007/s11664-012-2273-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-012-2273-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ehteshami Nasrin Department of Electrical Engineering, Islamic Azad University, Tabriz Branch, Tabriz, Iran aut NATIONALLICENCE 700 1- Sathi Vahid Department of Electrical Engineering, Islamic Azad University, Tabriz Branch, Tabriz, Iran aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/1(2013-01-01), 162-167 0361-5235 42:1<162 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer