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Improved DGS parameter extraction method for the polarization purity of circularly polarized microstrip antenna
Author(s) -
Prajapati Pravin R.,
Patnaik A.,
Kartikeyan M. V.
Publication year - 2016
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.21029
Subject(s) - microstrip antenna , dumbbell , microwave , patch antenna , microstrip , polarization (electrochemistry) , bandwidth (computing) , circular polarization , physics , optics , antenna (radio) , electronic engineering , materials science , computer science , engineering , telecommunications , chemistry , medicine , physical therapy
An improved method of parameter extraction of the most popular dumbbell shaped defected ground structure (DGS) is developed, which removes the drawbacks of the earlier approaches of parameter extraction methods. The proposed method is validated considering a circularly polarized (CP) microstrip antenna integrated with dumbbell shaped DGS for application of suppression of cross polarization. A set of fabricated laboratory prototypes, with and without DGS, is experimentally studied. The results show that the integration of DGS with antenna provides polarization purity of about 10 dB compared to the same patch without DGS at bore‐sight of the patch and enhances the return loss bandwidth about 40%. Good agreement among theory, simulated results, and the experimental results qualifies the proposed method as an effective tool for parameter extraction of the DGS. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2016.