13-11-2012, 06:21 PM
Implementation and Performance Analysis of N-Way Wilkinson Power Divider
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INRODUCTION
Power dividers called as power splitters and when used in reverse it acts as the power combiner a vital role in various RF and communication application [1, 2]. It is a passive device which is used in the field of radio technology which requires power to be distributed among different paths. The easiest way to approach this method can be done by using a power splitter/divider. Basically power dividers are reciprocal devices (i.e.) they can also be used to combine power from output ports into the input port. The two main categories of power dividers are reactive and resistive and each can be suited for its own specific applications. Wilkinson Power Divider (WPD) belongs to reactive power divider in which it has some special properties such as lossless network, high isolation between output ports and low insertion and isolation loss [1, 2].
RESULTS AND DISCUSSIONS
The following figures show the simulation result of insertion loss, return loss and isolation loss of 4-way and 8-way WPD with MLIN using ADS. From the figures, the return loss is highly desirable and the insertion loss is low when compared with 4-way WPD. Fig 6 and Fig 9 shows the return loss of 4-way WPD and 8-way WPD of about -9.767dB and -2.846dB respectively. Comparing these two figures return loss is highly desirable of about -6.921dB.
And also Fig 7 and Fig10 shows the insertion loss of about -6.393dB and -12.045dB respectively. Comparing these two figures the insertion loss gets minimized of about -6.652dB. From Fig 8 and Fig 11 the isolation loss is of about -5.412dB and -5.579dB respectively. By comparing these two figures the isolation loss gets minimized of about -0.167dB. Which concludes that 8-way WPD performance is better when compared with 4-way WPD.
CONCLUSION
This paper has presented a detailed analysis of a Wilkinson Power Divider using ADS software. The analyses have taken important parameters like isolation loss, insertion loss and return loss are determined for 4-way, 8-way, 16-way etc. High return loss is desirable where as the insertion loss and isolation loss should be a minimum value for power dividers. The analyses have shown that WPD satisfies the above constraints.