volume | PIER Journals

Abstract

A novel generalized design procedure of broadband planar baluns based on wire-bonded multiconductor transmission lines (MTL) is presented hereby based on analytical equations. The proposed balun consists of two parts. The first one is an in-phase power divider, which equally splits the input power through its two outputs. The later are two MTLs with wire bonding between alternate conductors configured to introduce +90 and -90 degrees phase shift respectively, so that the balanced output signal has a 180 degree phase difference. In that sense, new closed-form design equations in order to calculate the design parameters of both multiconductor elements are obtained. These equations allow the proper dimensions of both MTLs to be computed irrespective of both the number of conductors and the coupling factor, and therefore, to determine the performance of the balun. The design procedure for wire-bonded MTL baluns has been assessed by means of full-wave electromagnetic simulations and by experimental work. In addition, the very good agreement between the theoretical results and measurements makes possible to define a time-saving design methodology.

1. Mongia, R., I.. Bahl, and P. Bhartia, RF and Microwave Coupled-Line Circuits, Artech House, Norwood, MA, 1999.

2. Kumar, B. and G. Branner, "Optimized design of unique miniaturized planar baluns for wireless applications," IEEE Microwave and Wireless Components Letters, Vol. 13, No. 3, 134-136, Mar. 2003.
doi:10.1109/LMWC.2003.808717 Google Scholar

3. Ang, K. S., Y. Leong, and C. H. Lee, "Multisection impedance-transforming coupled-line baluns," IEEE Transactions on Microwave Theory and Techniques, Vol. 51, No. 2, 536-541, Feb. 2003.
doi:10.1109/TMTT.2002.807813 Google Scholar

4. Salah-Eddin, M. and A. Safwat, "Defected-ground coupled microstrip lines and its application in wideband baluns," IET Microwaves, Antennas & Propagation, Vol. 1, No. 4, 893-899, Aug. 2007.
doi:10.1049/iet-map:20070018 Google Scholar

5. Cloete, J., "Exact design of the marchand balun," 9th European Microwave Conference, 480-484, Sep. 1979.
doi:10.1109/EUMA.1979.332751 Google Scholar

6. Nguyen, C. and D. Smith, "Novel miniaturised wideband baluns for MIC and MMIC applications," Electronics Letters, Vol. 29, No. 12, 1060-1061, Jun. 1993.
doi:10.1049/el:19930708 Google Scholar

7. Tsai, M., "A new compact wideband balun," IEEE Microwave and Millimeter-wave Monolithic Circuits Symposium, 123-125, 1993.
doi:10.1109/MCS.1993.247462 Google Scholar

8. Ang, K. S. and I. Robertson, "Analysis and design of impedance-transforming planar marchand baluns," IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 2, 402-406, Feb. 2001.
doi:10.1109/22.903108 Google Scholar

9. Lu, J.-C., C.-C. Lin, and C.-Y. Chang, "Exact synthesis and implementation of new high-order wideband marchand baluns," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 1, 80-86, Jan. 2011.
doi:10.1109/TMTT.2010.2090702 Google Scholar

10. Jacques, R. and D. Meignant, "Novel wide band microstrip balun," 11th European Microwave Conference, 839-843, Sep. 1981.
doi:10.1109/EUMA.1981.332929 Google Scholar

11. Rogers, J. and R. Bhatia, "A 6 to 20 GHz planar balun using a wilkinson divider and lange couplers," IEEE MTT-S International Microwave Symposium Digest, Vol. 2, 865-868, Jul. 1991. Google Scholar

12. Zhang, Z.-Y., Y.-X. Guo, L. C. Ong, and M. Chia, "A new wide-band planar balun on a single-layer PCB," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 6, 416-418, Jun. 2005.
doi:10.1109/LMWC.2005.850486 Google Scholar

13. Antoniades, M. and G. Eleftheriades, "A broadband Wilkinson balun using microstrip metamaterial lines," IEEE Antennas and Wireless Propagation Letters, Vol. 4, 209-212, 2005.
doi:10.1109/LAWP.2005.851005 Google Scholar

14. Tseng, C.-H. and C.-L. Chang, "Wide-band balun using composite right/left-handed transmission line," Electronics Letters, Vol. 43, No. 21, 1154-1155, Nov. 2007.
doi:10.1049/el:20071759 Google Scholar

15. Chongcheawchamnan, M., C. Y. Ng, K. Bandudej, A.Worapishet, and I. Robertson, "On miniaturization isolation network of an all-ports matched impedance-transforming marchand balun," IEEE Microwave and Wireless Components Letters, Vol. 13, No. 7, 281-283, Jul. 2003.
doi:10.1109/LMWC.2003.814102 Google Scholar

16. Cobos-Bandera, S., J. J. Sánchez-Martínez, and E. Márquez-Segura, "Mems-based reconfigurable test-set for differential and common mode measurement using a two-port network analyzer," 42nd European Microwave Conference (EuMC), Oct. 2012. Google Scholar

17. Faria, J. A. B., Multiconductor Transmission-line Structures: Modal Analysis Techniques, Wiley, New York, 1993.

18. Paul, C. R., Analysis of Multiconductor Transmission Line, Wiley, New York, 1994.

19. Marquez-Segura, E., F. Casares-Miranda, P. Otero, C. Camacho-Penalosa, and J. Page, "Analytical model of the wire-bonded interdigital capacitor," IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 2, 748-754, Feb. 2006.
doi:10.1109/TMTT.2005.862634 Google Scholar

20. Casares-Miranda, F., P. Otero, E. Marquez-Segura, and C. Camacho-Penalosa, "Wire bonded interdigital capacitor," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 10, 700-702, Oct. 2005.
doi:10.1109/LMWC.2005.856835 Google Scholar

21. March, S., "A wideband stripline hybrid ring (correspondence)," IEEE Transactions on Microwave Theory and Techniques, Vol. 16 , No. 6, 361, Jun. 1968.
doi:10.1109/TMTT.1968.1126693 Google Scholar

22. Sanchez-Martinez, J. J., E. Marquez-Segura, P. Otero, and C. Camacho-Penalosa, "Artificial transmission line with left/right-handed behavior based on wire bonded interdigital capacitors," Progress In Electromagnetics Research B, Vol. 11, 245-264, 2009.
doi:10.2528/PIERB08120804 Google Scholar

23. Sanchez-Martinez, J. J., E. Marquez-Segura, and C. Camacho-Penalosa, "Synthesis of CRLH-TLs based on a shunt coupled-line section," 42nd European Microwave Conference (EuMC), 2012. Google Scholar

24. Liu, G.-Q., L.-S. Wu, and W.-Y. Yin, "A compact microstrip rat-race coupler with modified lange and t-shaped arms," Progress In Electromagnetics Research, Vol. 115, 509-523, 2011. Google Scholar

25. Sanchez-Martinez, J. J. and E. Maquez-Segura, "Analytical study of wide-band bandpass filters based on wire-bonded multiconductor transmission lines with LH behaviour," Progress In Electromagnetics Research Letters, Vol. 31, 1-13, 2012.
doi:10.2528/PIERL12012504 Google Scholar

26. Kuo, J.-T., C.-Y. Fan, and S.-C. Tang, "Dual-wideband bandpass filters with extended stopband based on coupled-line and coupled three-line resonators," Progress In Electromagnetics Research, Vol. 124, 1-15, 2012.
doi:10.2528/PIER11120103 Google Scholar

27. Li, S., B. Tang, Y. Liu, S. Li, C. Yu, and Y. Wu, "Miniaturized dual-band matching technique based on coupled-line transformer for dual-band power amplifiers design," Progress In Electromagnetics Research, Vol. 131, 195-210, 2012. Google Scholar

28. Li, B., X. Wu, N. Yang, and W. Wu, "Dual-band equal/unequal Wilkinson power dividers based on coupled-line section with short-circuited stub," Progress In Electromagnetics Research, Vol. 111, 163-178, 2011.
doi:10.2528/PIER10110108 Google Scholar

29. Ou, W., "Design equations for an interdigitated directional coupler," IEEE Transactions on Microwave Theory and Techniques, Vol. 23, No. 2, 253-255, Feb. 1975.
doi:10.1109/TMTT.1975.1128534 Google Scholar

30. Kajfez, D. and B. Vidula, "Design equations for symmetric microstrip dc blocks," IEEE Transactions on Microwave Theory and Techniques, Vol. 28, No. 9, 974-981, Sep. 1980.
doi:10.1109/TMTT.1980.1130205 Google Scholar

31. Page, J., E. Marquez-Segura, F. Casares-Miranda, J. Esteban, P. Otero, and C. Camacho-Penalosa, "Exact analysis of the wire-bonded multiconductor transmission line," IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 8, 1585-1592, Aug. 2007.
doi:10.1109/TMTT.2007.902084 Google Scholar

32. Pozar, D., Microwave Engineering, 2nd Edition, Wiley, New York, 1998.

33. Cohn, S., "A class of broadband three-port TEM-mode hybrids," IEEE Transactions on Microwave Theory and Techniques, Vol. 19, No. 2, 110-116, Feb. 1968.
doi:10.1109/TMTT.1968.1126617 Google Scholar

34. Kirschning, M. and R. Jansen, "Accurate wide-range design equations for the frequency-dependent characteristic of parallel coupled microstrip lines," IEEE Transactions on Microwave Theory and Techniques, Vol. 32, No. 1, 83-90, Jan. 1984.
doi:10.1109/TMTT.1984.1132616 Google Scholar

35. Faria, J. A. B., "Kirschning and Jansen computer-aided design formulae for the analysis of parallel coupled lines," Microwave and Optical Technology Letters, Vol. 51, No. 10, 2466-2470, 2009.
doi:10.1002/mop.24659 Google Scholar

36. Eisenstadt, W. R., B. Stengel, and B. M. Thompson, Microwave Differential Circuit Design Using Mixed-mode S-parameters, Artech House, Norwood, MA, 2006.

Dr. Juan-Jose Sanchez-Martinez

Dr. Enrique Marquez-Segura