An Integrated Four-Element Slot-Based MIMO and a UWB Sensing Antenna System for CR Platforms

Rifaqat Hussain, Mohammad S. Sharawi*, Atif Shamim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

100 Scopus citations


This communication presents a novel integrated antenna system for cognitive radio (CR) applications. The design consists of a compact four-element reconfigurable annular slot-based multiple-input-multiple-output (MIMO) antenna system integrated within an ultrawideband (UWB) sensing antenna. All the antenna elements are planar in structure and designed on a single substrate (RO-4350) with dimensions 60\times 120\times 1.5 mm3. The frequency reconfigurable slot-based MIMO antenna system is tuned over a wide frequency band from 1.77 to 2.51 GHz while the UWB sensing antenna is covering from 0.75 to 7.65 GHz The proposed antenna system is suitable for CR enabled wireless devices. The envelop correlation coefficient did not exceed 0.248 in the entire operating band of the MIMO antenna part. The maximum measured gain of the MIMO antenna is 3.2 dBi with a maximum efficiency of 81%.

Original languageEnglish (US)
Article number8170283
Pages (from-to)978-983
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Issue number2
StatePublished - Feb 2018

Bibliographical note

Publisher Copyright:
© 1963-2012 IEEE.


  • Cognitive radio (CR)
  • multiple-input multiple-output (MIMO)
  • reconfigurable antennas
  • ultrawideband (UWB) antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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