Open AccessCircularly polarised antenna with wide harmonics suppression by two angled C‐shaped structures
Author(s) -
Oh J.E.,
Sung Y.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.7407
Subject(s) - harmonics , stopband , optics , antenna (radio) , physics , reflection coefficient , harmonic , reflection (computer programming) , acoustics , telecommunications , computer science , band pass filter , voltage , quantum mechanics , programming language
In this Letter, a circularly polarised (CP) antenna is proposed. The proposed antenna is realised by combining two angled C‐shaped structures. By setting different widths ( W L and W R ) for the left and right angled C‐shaped structures, respectively, an asymmetric structure is obtained. Therefore, the proposed antenna exhibits CP characteristics. From repeated simulation results, the authors find that the optimum ratio W L : W R to make the proposed structure operate as a CP antenna is 5: 8. Moreover, the measured reflection coefficient is lower than −2.4 dB within a stopband up to 12 GHz. This means that wide harmonics suppression (up to the fifth harmonic) is successfully achieved.