Stepped impedance microstrip couplers with improved directivity

  title={Stepped impedance microstrip couplers with improved directivity},
  author={Johannes Muller and Christian Friesicke and Arne F. Jacob},
  journal={2009 IEEE MTT-S International Microwave Symposium Digest},
This paper presents the design of microstrip couplers with improved directivity. In order to compensate for the unequal phase velocities of even- and odd-mode in inhomogeneous media, the coupler is subdivided into multiple sections. It is shown that by properly choosing the lengths, the impedances, and the coupling coefficients of the corresponding sections, the coupler's directivity can be optimized. The design procedures can easily be applied using commercially available simulation software… CONTINUE READING
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Accurate design of microstrip directional couplers with capacitive compensation

  • M. Dydyk
  • IEEE MTT-S Int. Microwave Symp. Dig., pp. 581–584…
  • 1990
1 Excerpt

Accurate wide-range design equations for the frequency-dependent characteristic of parallel coupled microstrip lines

  • M. Kirschning, R. Jansen
  • IEEE Trans. Microwave Theory Tech., vol. 32, no…
  • 1984
1 Excerpt

Method for equalizing phase velocities of coupled microstrip lines by using anisotropic substrate

  • M. Kobayashi, R. Terakado
  • IEEE Trans. Microwave Theory Tech., pp. 719–722…
  • 1980
1 Excerpt

Microstrip lines with partially removed ground metallization, theory and applications

  • R. Jansen
  • Int. J. Electron. Commun. (AEÜ), pp. 485–192…
  • 1978
1 Excerpt

Broad-band directional couplers using microstrip with dielectric overlays

  • B. Sheleg, B. Spielmann
  • IEEE Trans. Microwave Theory Tech., pp. 1216–1220…
  • 1974
1 Excerpt

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