volume | PIER Journals

2017-06-19

A Compact Microstrip Crossover Based on Capacitively-Loaded Artificial Transmission Lines Branch-Line Sections

Jordi Verdú Tirado,

Dr. Jordi Verdú Tirado

Telecommunications and Systems Engineering

Universitat Autonoma de Barcelona

Spain

Homepage

Endika Bernaola,

Dr. Endika Bernaola

Telecommunications and Systems Engineering Department

Universitat Autonoma de Barcelona (UAB)

Spain

Homepage

Pedro de Paco

Dr. Pedro de Paco

Telecommunication and System Engineering Department

Universitat Autônoma de Barcelona

Spain

Homepage

Progress In Electromagnetics Research Letters, Vol. 68, 121-126, 2017

doi:10.2528/PIERL17041406

Abstract

This paper presents a compact size crossover device based on the cascade of branch-line sections. With the aim of reducing its size, some of the transmission lines of the structure have been replaced by its equivalent artificial transmission line (ATL). The obtained size reduction is above 30%, and the electrical performance of the proposed structure presents an isolation better than 20 dB in a FBW=34.5% and a crossover bandwidth better than 2 dB of FBW=51.5%. Also the good magnitude and phase balance performance must be highlighted.

Citation

Copy Export

Jordi Verdú Tirado, Endika Bernaola, and Pedro de Paco, "A Compact Microstrip Crossover Based on Capacitively-Loaded Artificial Transmission Lines Branch-Line Sections," Progress In Electromagnetics Research Letters, Vol. 68, 121-126, 2017.
doi:10.2528/PIERL17041406

References

1. Horng, T. S., "A rigorous study of microstrip crossovers and their possible improvements," IEEE Transactions on Microwave Theory and Techniques, Vol. 42, 1802-1806, 1994.
doi:10.1109/22.310591

2. Liu, W., Z. Zhang, Z. Feng, and M. F. Iskander, "A compact wideband microstrip crossover," IEEE Microwave and Wireless Components Letters, Vol. 22, 254-256, 2012.
doi:10.1109/LMWC.2012.2190270

3. Lin, F., Q. X. Chu, and W. Wong, "Dual-band planar crossover with two section branch-line structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 42, 2309-2316, 2013.
doi:10.1109/TMTT.2013.2261084

4. Yao, J., C. Lee, and S. P. Yeo, "Microstrip branch-line couplers for crossover application," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, 87-92, 2011.
doi:10.1109/TMTT.2010.2090695

5. Collin, R. E., Foundations for Microwave Engineering, John Wiley & Sons, Inc., 2000.

6. Pozar, D. M., Microwave Engineering, John Wiley & Sons, Inc., 2005.