12704_SCTE_Broadband_Nov2016_COMPLETE_lowres

technical

Conclusion This article has presented a small size UWB 1-to-4 power divider. A multiple section method has been used to achieve UWB operation (3.1GHz-10.6GHz). The small size designs for both 1-to-2 and 1-to-4 dividers make them suitable for applications where size and performance are critical, such as in antenna array applications. The simulation and experimental results largely agree, which validates the design approach. Acknowledgments This work was supported by the Higher Committee for Higher Education Development in Iraq (HCED) and the Yorkshire Innovation Fund, Research Development Project (RDP) Ref: RY0042 including the TSB grant application through Knowledge Transfer Programme KTP008734.

Figure 4:

0402 imperial size (1mm x 0.5mm) to ensure a 0.5mm gap between the two branches of the power divider. The fabricated power divider is shown in Fig. 4 above. An Agilent N5242A network analyser was used to measure S-parameters for the 1-to-4 power divider, shown in Fig. 5. The return loss is below 13dB over the band, with isolation below 14dB, while the insertion loss is between 6dB and 8dB. The experimental and simulated results largely agree. Small differences could be due to several reasons, such as resistor positioning and soldering. Experiments do show that the return loss changes when the resistors are shifted, and also that the amount of solder used with the connector affects the results. On top of that, fabrication tolerance also has its impact on results.

Figure 5:

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Vol. 38 No. 4 - November 2016 Issue