Design of Multi Band Filtering Antenna with Low Mutual Coupling Using Decoupling Network.

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Bibliographic Details
Title:	Design of Multi Band Filtering Antenna with Low Mutual Coupling Using Decoupling Network.
Authors:	Verma, Deepika¹ deepikaverma609@gmail.com, Verma, Kiran K.¹, Chandan²
Source:	Progress in Electromagnetics Research C. 2026, Vol. 169, p84-94. 11p.
Subjects:	Multifrequency antennas, Notch filters, Wireless communications, Interference suppression, Computer networks
Abstract:	This paper presents the design of a compact multi-band filtered MIMO antenna, whereby a UWB antenna is converted into a tri-band antenna by adding two stubs-loaded band-notch filters (SLBNFs). The notch structures tactfully quiet undesired frequency bands and permit three clean operating bands likely to be utilized in S-band and C-band wireless systems. A 2 x 2 MIMO system is proposed using a centrally located decoupling network to regulate the distribution of surface currents, which achieves over 25 dB of isolation in all operating bands. The fractional bandwidth of the antenna in the first band (2.0-2.6 GHz), second band (3.48-3.82 GHz), and third band (5.68-6.42 GHz) are 16%, 9.3%, and 12.23%, respectively. The peak gains in the corresponding operating bands are 2.8 dB, 4.1 dB, and 5 dB, respectively. The proposed design is suitable for the present-day S- and C-band communication systems and multi-standard wireless devices due to its selective multi-band response, better isolation, and compact structure. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	This paper presents the design of a compact multi-band filtered MIMO antenna, whereby a UWB antenna is converted into a tri-band antenna by adding two stubs-loaded band-notch filters (SLBNFs). The notch structures tactfully quiet undesired frequency bands and permit three clean operating bands likely to be utilized in S-band and C-band wireless systems. A 2 x 2 MIMO system is proposed using a centrally located decoupling network to regulate the distribution of surface currents, which achieves over 25 dB of isolation in all operating bands. The fractional bandwidth of the antenna in the first band (2.0-2.6 GHz), second band (3.48-3.82 GHz), and third band (5.68-6.42 GHz) are 16%, 9.3%, and 12.23%, respectively. The peak gains in the corresponding operating bands are 2.8 dB, 4.1 dB, and 5 dB, respectively. The proposed design is suitable for the present-day S- and C-band communication systems and multi-standard wireless devices due to its selective multi-band response, better isolation, and compact structure. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC26020602