Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T13:18:26.489Z Has data issue: false hasContentIssue false
  • English
  • Français

Impedance transforming directional couplers with increased achievable transformation ratio

Published online by Cambridge University Press:  26 April 2016

Jakub Sorocki ,
Ilona Piekarz ,
Krzysztof Wincza  and
Slawomir Gruszczynski
Jakub Sorocki
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland
Ilona Piekarz
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland
Krzysztof Wincza
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland
Slawomir Gruszczynski*
Affiliation:
AGH University of Science and Technology, 30-059 Cracow, Poland
*
Corresponding author: S. Gruszczynski Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Novel impedance transforming directional couplers are proposed in which the achievable impedance transformation ratio is increased above the previously reported limit related to coupling of the coupled-line sections. The proposed couplers consist of two coupled-line sections between which uncoupled sections of left-handed lines are connected. The presented concept has been verified by circuit simulations as well as by measurements of the manufactured 3-dB coupled-line impedance transforming directional coupler operating at f0 = 1.2 GHz and featuring twofold increased impedance transformation ratio R = 4.

Keywords

Directional couplerImpedance transformerCoupled-line couplersLeft-handed transmission lines
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 3 , April 2017 , pp. 509 - 513
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Cristal, E.G.: Coupled-transmission-line directional couplers with coupled lines of unequal characteristic impedances. IEEE Trans. Microw. Theory Tech., MTT-14 (7) (1966), 337–346.CrossRefGoogle Scholar
[2] Ahn, H.R.; Kim, B.: Transmission-line directional couplers for impedance transforming. IEEE Microw. Wireless Compon. Lett., 16 (10) (2006), 537–539.Google Scholar
[3] Ahn, H.R.; Kim, B.: Toward integrated circuit size reduction. IEEE Microw. Mag., 9 (1) (2008), 65–75.Google Scholar
[4] 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
[5] Wincza, K.; Gruszczynski, S.; Kuta, S.: Approach to the design of asymmetric coupled-line directional couplers with the maximum achievable impedance-transforming ratio. IEEE Trans. Microw. Theory Tech., 60 (5) (2012), 1218–1225.Google Scholar
[6] Sorocki, J.; Staszek, K.; Piekarz, I.; Wincza, K.; Gruszczynski, S.: Directional couplers with reduced coupling requirements as connection of coupled-line sections and left-handed transmission lines. IET Microw. Antennas Propag., 8 (8) (2014), 580–588.CrossRefGoogle Scholar
[7] Sorocki, J.; Piekarz, I.; Wincza, K.; Gruszczynski, S.: Broadband magic-Ts with the use of coupled-line directional coupler and left-handed transmission line sections. Int. J. RF Microw. Comput. Aid. Eng., 24 (4), (2014), 1–7.Google Scholar
[8] Djordjevic, A.R.; Bazdar, M.B.; Sarkar, T.K.; Harrington, R.F.: Matrix parameters for multiconductor transmission lines, Software and User's Manual, Artech House, Norwood, 1990.Google Scholar