To make the analysis & find out the future enhancements.</li></li></ul><li>Need for this Project <br /><ul><li>Consider any balanced LNA with a band pass filter , normally used in satellite receivers, radiometers, transceivers & W-CDMA receivers.
The proposed diagram represents how the complexity of a conventional design can be reduced.</li></li></ul><li>Specification of the design<br />
3rd Order Band Pass Filter using Chebyshev prototype <br /><ul><li>The normalised low pass parameters were calculated
Circuit model implementation</li></ul>Spread Sheet for all the Calculations<br />
Schematic of a 3rd order band pass filter<br />Agilent ADS was used to design the circuit & microstrip layouts. <br />
J-inverter model for 3rd order band pass filter <br /><ul><li>The next part of the implementation is to convert schematic level in terms of j-inverter.</li></li></ul><li>Schematic for 3-dB Band Pass Filtered Power Divider<br />Simulation response :<br />1. Before optimization<br />2. After optimization<br />
Microstrip Layout Design <br /><ul><li>The required geometries for microstrip design such as width & length were calculated using MS-Excel.
Using the above parameters, there are four different designs were developed.</li></li></ul><li>Design Procedure for Microstrip Layout<br /><ul><li>Determine the desired shape & length of the resonator
Use the theoretical coupling coefficients to relate with the coupling spacing’s
Extract the external Q-factor in order to connect input & output ports
Build the final layout using all the previous steps.
Simulate the overall design and tune the physical layout to achieve desired value.</li></li></ul><li>Microstrip Design - 1<br />Simulation Response<br />
Conclusion<br /><ul><li>This research represents one of the first efforts to advance the present trend in RF/Microwave engineering especially on balanced LNA designs.
The design & implementation of 3-dB band pass filtered power divider for circuit & microstrip layouts were executed successfully.
The agreement between the predicted & the obtained values of insertion losses (S21 & S31) & return loss (S11) were strong enough for fabrication.</li></ul>Future Research <br /><ul><li>However, insights from this research can only provide a filtered power divider, whereas power combining is not possible due to the poor isolation between the output ports, hence this drawback can be consider for future research.</li></ul>Thank You...!<br />