An integrated "sense-and-communicate" broad-/narrow-band optically controlled reconfigurable antenna for cognitive radio systems
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Yksityiskohdat
| Alkuperäiskieli | Englanti |
|---|---|
| Sivut | 1016-1023 |
| Sivumäärä | 8 |
| Julkaisu | Microwave and Optical Technology Letters |
| Vuosikerta | 57 |
| Numero | 4 |
| DOI - pysyväislinkit | |
| Tila | Julkaistu - 1 huhtikuuta 2015 |
| OKM-julkaisutyyppi | A1 Alkuperäisartikkeli |
Tiivistelmä
An optically controlled reconfigurable antenna with operability in both wide and narrow bands is investigated for cognitive radio systems. The proposed antenna consists of a U-shaped patch for the spectrum sensing over a wide band and two open annuli for communication in narrow sub-bands within the frequency range of 3.1-10.6 GHz. The integration of narrow and wide bands devices makes the whole antenna structure compact with a dimension of 40 × 38.5 mm2. With an inherent property of being electromagnetically transparency, four appropriately placed laser-controlled photoconductive silicon switches are adopted to achieve reconfigurable frequency characteristics in the four bands of 5.8-6.8, 6.7-7.3, 7.0-8.4, and 7.9-9.2 GHz with the reflection coefficient below -10 dB. The wide-narrowband antenna is fed by two coplanar waveguides with the isolation of S21