Abstract
This paper presents a compact circularly polarized (CP) antenna with an integrated higher order harmonic rejection filter. The proposed design operates within the ISM band of 2.32 GHz- 2.63 GHz and is suitable for example for wireless power transfer applications. Asymmetrical truncated edges on a square ring create a defected ground structure to excite the CP property, simultaneously realizing compactness. It offers a 50.5% reduced patch area compared to a conventional design. Novel stubs and slot shapes are integrated in the transmission line to reduce higher (up to the third) order harmonics. The proposed prototype yields a -10 dB reflection coefficient (S11) impedance bandwidth of 12.53%, a 3 dB axial ratio bandwidth of 3.27%, and a gain of 5.64 dBi. Measurements also show good agreement with simulations.
MeSH terms
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Computer Simulation
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Electric Impedance*
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Equipment Design / methods*
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Models, Theoretical
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Reproducibility of Results
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Wireless Technology / instrumentation*
Grants and funding
This work was supported in part by the Collaborative Research in Engineering, Science and Technology (CREST) fund, Malaysia, under Grant Number 4B151; and Universiti Teknologi Malaysia under Grant Numbers 05H39 and 4F617. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The funder provided support in the form of salaries for author BWC, and was involved in the decision to publish, but did not have any additional role in the study design, data collection and analysis, or preparation of the manuscript. The specific roles of this author are articulated in the ‘author contributions’ section.