Miniaturized Gysel power divider with nth harmonics suppression

In this paper, a miniaturized Gysel power divider with nth harmonic suppression has been presented. The Gysel power divider retains its capability of high-power handling, while extreme size reduction makes it suitable for application in small-sized circuits with higher order harmonics rejection. A lowpass filter with high performance and appropriate characteristic has been placed instead of the conventional transmission lines a quarter wavelength. It results in the size reduction and harmonics rejection of the Gysel power divider, effectively. The presented Gysel power divider operated at center frequency of 0.764 GHz with fractional bandwidth of 36%. To substantiate the validity and efficiency of the proposed circuits, the designed power divider was fabricated and measured. It is seen that the results of the measurements and simulations are highly consistent together. The main frequency; the return loss of the port 1, the return loss of the port 2, isolation, and insertion loss are 28, 29, 32 and 1.3 dB, respectively. The overall circuit size is 22.1 mm × 65.7 mm.