Multipatches multilayered UWB microstrip antennas

Nasimuddin*, Z. N. Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)


The authors present multipatches multilayered ultra-wideband (UWB) microstrip antennas. The antenna comprises a driven patch radiator with five parasitic patch radiators. Two antennas with different dielectric substrate combinations are studied. The antenna with low-high-low dielectric constant substrate combination (Antenna no. 1) has an improved performance in terms of impedance bandwidth, gain, overall antenna size and beam-squinting over the antenna with low-low-low dielectric constant substrate combination (Antenna no. 2). The low-high-low dielectric constant combination consisting of three dielectric substrates, namely low dielectric constant (εr=3.38) for both bottom and upper substrate but, high dielectric constant (εr=6.15) for middle substrate. Five parasitic patches and multi-dielectric layers are used for wide impedance bandwidth and less boresight gain variation with frequency. A measured 10dB return loss bandwidth of 48 with boresight gain >5.0dBi is achieved. Antenna no. 1 can have 8 wider impedance bandwidth, 40 overall area reduction and less beam-squinting compared with Antenna no. 2.

Original languageEnglish
Pages (from-to)379-386
Number of pages8
JournalIET Microwaves, Antennas and Propagation
Issue number3
Publication statusPublished - 2009
Externally publishedYes

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