Affiliations 

  • 1 Wireless Communication Centre, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
  • 2 Advanced Communication Engineering (ACE) CoE, School of Computer & Communication Engineering, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
  • 3 Intel Microelectronics, Halaman Kampung Jawa, Penang, Malaysia
  • 4 Department of Electrical Engineering, Katholieke Universiteit Leuven, Leuven, Belgium
PLoS One, 2017;12(2):e0172162.
PMID: 28192504 DOI: 10.1371/journal.pone.0172162

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.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.