A Frequency Reconfigurable MIMO Antenna with Bandstop Filter Decoupling Network for Cognitive Communication

A compact reconfigurable MIMO antenna was developed for cognitive radio applications in this research work. A bandstop filter-based decoupling network was employed in this MIMO antenna to keep mutual coupling at a minimum. A single PIN diode was connected in the filter configuration for the purpose...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-09, Vol.22 (18), p.6937
Main Authors: Islam, Hashinur, Das, Saumya, Ali, Tanweer, Bose, Tanushree, Prakash, Om, Kumar, Pradeep
Format: Article
Language:English
Subjects:
Antennas
Antennas (Electronics)
bandstop filter-based decoupling network
Bandstop filters
Channel capacity
Cognition
cognitive communication system
Cognitive radio
Communication
Computer Communication Networks
Correlation coefficients
Decoupling
Design
Diodes
Electric filters
Equipment and supplies
Frequencies
MIMO communication
MIMO communications
Mutual coupling
PIN diodes
reconfigurable MIMO antenna
Reconfiguration
Testing
Wireless Technology
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Summary:A compact reconfigurable MIMO antenna was developed for cognitive radio applications in this research work. A bandstop filter-based decoupling network was employed in this MIMO antenna to keep mutual coupling at a minimum. A single PIN diode was connected in the filter configuration for the purpose of reconfiguration. Controlling the ON/OFF conditions of the PIN diode, it became possible to achieve a MIMO operating frequency of 4.75 GHz in mode 1 and 1.77 GHz in mode 2, respectively. At 4.75 GHz, isolation was 42.68 dB, while at 1.77 GHz, isolation was 26.52 dB. The proposed reconfigurable MIMO antenna achieved a peak gain and radiation efficiency of 6.63 dBi and 92.04 percent in mode 1 and 4.41 dBi and 89.64 percent in mode 2. MIMO characteristics such as an envelope correlation coefficient (ECC) less than 0.253, diversity gain (DG) greater than 9.675 dB, a mean effective gain (MEG) measurement ratio of less than 0.00388 dB, and channel capacity loss (CCL) of less than 0.06528 bits/s/Hz were measured for both operational frequency bands. To make it simple to integrate into small wireless devices, the overall size of the antenna is limited to 48 mm×24 mm 0.28 λ0×0.12 λ0.
ISSN:1424-8220
1424-8220
DOI:10.3390/s22186937