A frequency-reconfigurable elliptical monopole antenna for cognitive radio networks

Authors

SANTASRI KOLEY
DEBJANI MITRA

DOI

10.3906/elk-1605-45

Abstract

In this paper, an elliptical disk monopole antenna with seven switchable states, including an ultrawideband (UWB) state and six narrowband states, is presented. It consists of an elliptical disk radiator to operate in the UWB mode for cognitive radio (CR) sensing. To operate in the narrowband mode, the antenna is fed through a defected ground structure (DGS) integrated microstrip line. Frequency reconfigurability is achieved by changing the DGS slot length using six electronic switches. The simple proposed design can cover a wide range of frequency bands from 0.75 to 12 GHz, has an omnidirectional radiation pattern with high gain, and is especially suitable as a CR front-end. The fabricated prototype shows good impedance matching in the specified frequency range.

Keywords

Cognitive radio, reconfigurable antenna, switchable filter, ultrawideband

First Page

2535

Last Page

2546

Recommended Citation

KOLEY, SANTASRI and MITRA, DEBJANI (2017) "A frequency-reconfigurable elliptical monopole antenna for cognitive radio networks," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 25: No. 3, Article 74. https://doi.org/10.3906/elk-1605-45
Available at: https://journals.tubitak.gov.tr/elektrik/vol25/iss3/74