Adnan Kantemur, Jinpil Tak, Peyman Siyari, Ahmed H. Abdelrahman, Marwan Krunz, Hao Xin

Research output: Contribution to journalArticlepeer-review

## Abstract

A novel reconfigurable antenna covering an 11.5:1 bandwidth is designed and fabricated for cognitive radio applications. The proposed novel antenna has two independent paths to cover 430 MHz to 5 GHz frequency range. The first path is directly connected to an ultrawideband antenna, which covers 1-5 GHz operation frequency range. The second path, for the frequency range between 430 MHz and 1 GHz, goes through a dc-controlled varactor-based matching network. The switching functionality between wideband (1 to 5 GHz) and reconfigurable region (430 MHz to 1 GHz) is realized by two discrete switches. The designed antenna has a simple structure and compact size of 60 mm $\times100$ mm. The proposed novel antenna has great potential for use in cognitive radio systems.

Original language English (US) 9104027 6538-6547 10 IEEE Transactions on Antennas and Propagation 68 9 https://doi.org/10.1109/TAP.2020.2996803 Published - Sep 2020