Compact Wilkinson power divider with multi-harmonics suppression

Abstract

Conventional Wilkinson Power Divider (CWPD) occupies a large area using the quarter-wavelength transmission lines and has a low Fractional BandWidth (FBW). Also, unwanted harmonics have not been eliminated. In this research, using semicircular- shape resonators instead of each quarter-wavelength transmission lines, a novel Wilkinson power divider has been introduced. This innovation has been improved the performance of the proposed Power Divider (PD). The use of semicircular resonators reduces the size of the CWPD by about 69%. The central frequency of this power divider is 0.935 GHz, with FBW of about 36%. The return loss of port 1 and port2, the isolation and insertion loss in operational frequency are 20.9 dB, 22 dB, 18.7 dB, and 3.05 dB, respectively. Presented PD provides a high rejection band (2.5–27 GHz) that capable of suppressing third to twenty-seventh harmonics. Finally, the proposed PD has been fabricated and the measured results are well matched to the simulated results.