Star-junction multiplexers are used when the number of channels is relatively small since the resonating junction has to be connected to many filters' outputs. In this paper, novel topologies of star-junction multiplexers with resonating junctions are proposed. The advantage of the proposed topologies is that the number of connections to the resonating junction is reduced and thus allowing multiplexers with more channels to be implemented. An optimization technique is used to synthesize the coupling matrix of the proposed multiplexers, and numerical examples are illustrated in this paper.
2. Lancaster, M. J., Radio frequency filter, W.I.P.O patent WO/01/69712, 2001.
3. Garcia-Lamperez, A., M. Salazar-Palma, and T. K. Sarkar, "Analytical synthesis of microwave multiport networks," IEEE MTT-S International Microwave Symposium Digest, 455-458, USA, June 2004.
4. Garcia-Lamperez, A., M. Salazar-Palma, and T. K. Sarkar, "Compact multiplexer formed by coupled resonators with distributed coupling," IEEE Antennas and Propagation Society International Symposium, 89-92, USA, 2005.
5. Skaik, T., M. Lancaster, and F. Huang, "Synthesis of multiple output coupled resonator microwave circuits using coupling matrix optimization," IET Journal of Microwaves, Antennas and Propagation, Vol. 5, No. 9, 1081-1088, June 2011.
doi:10.1049/iet-map.2010.0447
6. Skaik, T. and M. Lancaster, "Coupled resonator diplexer without external junction," Journal of Electromagnetic Analysis and Applications, Vol. 3, No. 6, 238-241, June 2011.
doi:10.4236/jemaa.2011.36038
7. Macchiarella, G. and S. Tamiazzo, "Synthesis of star-junction multiplexers," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 12, 3732-3741, 2010.
8. Macchiarella, G., S. Tamiazzo, and , "Novel approach to the synthesis of microwave diplexers," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 12, 4281-4290, 2006.
doi:10.1109/TMTT.2006.885909
9. Macchiarella, G. and S. Tamiazzo, "Design of triplexer combiners for base stations of mobile communications," IEEE MTT-S Int. Microw. Symp. Dig., 429-432, Anheim, CA, May 2010.
Submit
