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U WB coplanar waveguide‐fed coplanar strips rectangular spiral antenna
Author(s) -
Omar Amjad A.,
Abu Safia Ousama,
Nedil Mourad
Publication year - 2017
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21115
Subject(s) - coplanar waveguide , spiral antenna , strips , balun , return loss , spiral (railway) , antenna (radio) , radiation pattern , optics , materials science , tapering , optoelectronics , physics , electrical engineering , coaxial antenna , telecommunications , microwave , engineering , computer science , mechanical engineering , composite material , computer graphics (images)
This article proposes an ultra‐wideband coplanar strips (CPS) rectangular spiral antenna that is fed by coplanar waveguide (CPW). The CPS is formed by gradually reducing the width of the CPW ground planes without the need of a balun. The antenna operates in the frequency band (3.5‐10.6 GHz) and has miniaturized size of 50 × 40 × 0.508 mm on a Rogers RO4003C substrate. The CPS spiral is terminated with a 100 Ω chip resistor for matching. A parametric study was performed to choose the CPS spiral dimensions. A good agreement is found between simulations and measurements in the radiation pattern and the return loss which was found to be better than 10 dB over the band. The measured peak gain ranges between 1 and 4.7 dBi.