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Broadband coupled-line directional couplers with high impedance transformation ratio

Published online by Cambridge University Press:  10 February 2017

Krzysztof Wincza  and
Slawomir Gruszczynski
Krzysztof Wincza
Affiliation:
AGH University of Science and Technology, Cracow 30-059, Poland. Phone: +48-12 617-30-21
Slawomir Gruszczynski*
Affiliation:
AGH University of Science and Technology, Cracow 30-059, Poland. Phone: +48-12 617-30-21
*
Corresponding author: S. Gruszczynski Email: [email protected]
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Abstract

A new class of 3-dB impedance transforming directional couplers has been proposed in which the recently published coupled-line couplers, consisting of coupled-line sections having different electrical lengths, have been utilized. The main advantage of the proposed directional couplers is the possibility of obtaining high impedance transformation ratio, thus the known limiting condition of realizable impedance transformation in 3-dB couplers is overcome. Moreover, the proposed directional couplers feature significantly wider operational bandwidths. The theoretical analysis of the proposed impedance-transforming directional couplers has been shown and is fully supported by the measurements of the manufactured model operating in 0.5–1.5 GHz frequency range.

Keywords

Passive components and circuitsCircuit design and applicationsDirectional couplers
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 7: EuCAP 2016 special issue , September 2017 , pp. 1473 - 1480
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

REFERENCES

[1] Raab, F.H. et al. : Power Amplifiers and transmitters for RF and microwave. IEEE Trans. Microw. Theory Tech., 50 (3) (2002), 814–826.CrossRefGoogle Scholar
[2] Florian, C.; Ciganani, R.; Santarelli, A.; Filicori, F.: Design of 40-W AlGaN/GaN MMIC high-power amplifiers for C-band SAR applications. IEEE Trans. Microw. Theory Tech., 61 (12) (2013), 4492–4504.Google Scholar
[3] Epp, L.W.; Hoppe, D.J.; Khan, A.R.; Stride, S.L.: A high-power Ka-band (31-36 GHz) solid-state amplifier based on low-loss corporate waveguide combining. IEEE Trans. Microw. Theory Tech., 59 (8) (2008), 1899–1908.CrossRefGoogle Scholar
[4] Javidan, J.; Atarodi, M.; Loung, H.C.: High power amplifier based on transformer-type power combiner in CMOS technology. IEEE Trans. Microw. Theory Tech., 57 (11) (2010), 838–842.Google Scholar
[5] Johansson, T.; Fritzin, J.: A review of watt-level CMOS RF power amplifiers. IEEE Trans. Microw. Theory Tech., 62 (1) (2014), 111–124.CrossRefGoogle Scholar
[6] Fathelbab, W.M.: The synthesis of a class of branch-line directional couplers. IEEE Trans. Microw. Theory Tech., 56 (8) (2008), 1985–1994.Google Scholar
[7] Oliver, B.M.: Directional electromagnetic couplers. Proc. IRE, 42 (11) (1954), 1686–1692.Google Scholar
[8] Sachse, K.; Sawicki, A.: Quasi-ideal multilayer two- and three-strip directional couplers for monolithic and hybrid MICs. IEEE Trans. Microw. Theory Tech., 47 (9) (1999), 1873–1882.Google Scholar
[9] Gruszczynski, S.; Wincza, K.; Sachse, K.: Design of high-performance three-strip 3-dB directional coupler in multilayer technology with compensated parasitic reactances. Microw. Opt. Technol. Lett., 49 (7) (2007), 1656–1659.CrossRefGoogle Scholar
[10] Chevaux, N.; De Souza, M.M.: Comparative analysis of VDMOS/LDMOS power transistors for RF amplifiers. IEEE Trans. Microw. Theory Tech., 57 (11) (2009), 2643–2651.Google Scholar
[11] Lee, H.; Park, C.; Hong, S.: A quasi-four-pair class-E CMOS RF power amplifier with an integrated passive device transformer. IEEE Trans. Microw. Theory Tech., 57 (4) (2009), 752–759.Google Scholar
[12] Sorocki, J.; Piekarz, I.; Wincza, K.; Gruszczynski, S.: Impedance transforming directional couplers with increased achievable transformation ratio. Int. J. Microw. Wireless Technol., in press, DOI: https://doi.org/10.1017/S1759078716000520.Google Scholar
[13] Wincza, K.; Gruszczynski, S.: Asymmetric coupled-line directional couplers as impedance transformers in balanced and n-way power amplifiers. IEEE Trans. Microw. Theory Tech., 59 (7) (2011), 1803–1810.Google Scholar
[14] Wincza, K.; Gruszczyński, S.; Kuta, S.: Approach to the design of asymmetric coupled-line directional couplers with the maximum achievable impedance transformation ratio. IEEE Trans. Microw. Theory Tech., 60 (5) (2012), 1218–1225.Google Scholar
[15] Wincza, K.; Piekarz, I.; Gruszczynski, S.: Two-section asymmetric coupled-line impedance transforming directional couplers. IET Microw. Antennas Propag., 9 (4) (2015), 343–350.Google Scholar
[16] Staszek, K.; Wincza, K.; Gruszczynski, S.: Multisection couplers with coupled-line sections having unequal lengths. IEEE Trans. Microw. Theory Tech., 62 (7) (2014), 1461–1469.Google Scholar
[17] Cristal, E. G.; Young, L.: Theory and tables of optimum symmetrical TEM-mode coupled-transmission-line directional couplers. IEEE Trans. Microw. Theory Tech., MTT-13 (1965), 544–558.CrossRefGoogle Scholar
[18] Shelton, J.P.; Mosko, J.A.: Synthesis and design of wideband equal ripple TEM directional couplers and fixed phase shifters. IEEE Trans. Microw. Theory Tech., MTT-14 (1966), 462–473.CrossRefGoogle Scholar
[19] Sachse, K.: The scattering parameters and directional coupler analysis of characteristically terminated asymmetric coupled transmission lines in an inhomogeneous medium. IEEE Trans. Microw. Theory Tech., 38 (4) (1990), 417–425.CrossRefGoogle Scholar
[20] Matthaei, G.L.; Young, L.; Jones, E.M.T.: Microwave Filters, Impedance-Matching Net-Works, and Coupling Structures. McGraw Hill, New York, 1964.Google Scholar
[21] Djordjevic, A.R.; Bazdar, M.B.; Sarkar, T.K.; Harrington, R.F.: Matrix Parameters for Multiconductor Transmission Lines, Sofware and User's Manual. Norwood, MA, USA: Artech House 1990.Google Scholar