The measured versus simulated performance of the classic Wilkinson power divider is shown in Figure 11. The isolation performance of the stub designs represents a 20 dB improvement relative to the classic Wilkinson (see Figure 12). The input and output reflection characteristics (|S11|, |S22| and |S33|) are optimized, while |S21| and |S31| approach the ideal value of 3 dB.

Figure 11

Figure 11 Measured vs. simulated |Sxx| of the classic Wilkinson power divider.

Figure 12

Figure 12 |S23| of the original, cross-stub and open-stub power dividers.

CONCLUSION

A novel version of a Wilkinson power divider uses a compact stub structure to achieve a 93 percent size reduction. The performance of two slightly different prototype designs agrees closely with the simulations and without compromise relative to the classic design. Actually, output port isolation is improved by 20 dB.

ACKNOWLEDGMENT

This work was supported by the Directorate General for Scientific Research and Technological development (DGRSDT) of Algeria.

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