TY - GEN
T1 - Directivity Enhancement of Tight Couplers
AU - Sorkin, Oz
AU - Holdengreber, Eldad
AU - Averbukh, Moshe
AU - Schacham, Shmuel E.
AU - Farber, Eliyahu
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - An enhancement of 22 dB in directivity, and 15 dB in return loss was achieved in an improved wiggly-line coupler. The improvement was obtained by introducing two new degrees of freedom to the wiggly-line. Heat maps of coupling, directivity and return loss, as a function of the new degrees of freedom, show previously unavailable fine-tuning capabilities, from which optimal parameters were derived. The use of the improved wiggly-line allows a better even- and odd-mode phase velocity compensation, and an improvement of 42% of even- and odd-mode velocity difference is shown. The improved wiggly-line concept is used to design a tight, tandem, 1.6dB coupler as a center stage of 3-stage symmetrical wideband, 6-18 GHz, 90- degree hybrid coupler implemented in microstrip coupled line topology using bond wires for the tandem section. The loose stage is designed using periodic, quasi-lumped, capacitively-loaded coupled lines. A CST simulation of each design step is shown.
AB - An enhancement of 22 dB in directivity, and 15 dB in return loss was achieved in an improved wiggly-line coupler. The improvement was obtained by introducing two new degrees of freedom to the wiggly-line. Heat maps of coupling, directivity and return loss, as a function of the new degrees of freedom, show previously unavailable fine-tuning capabilities, from which optimal parameters were derived. The use of the improved wiggly-line allows a better even- and odd-mode phase velocity compensation, and an improvement of 42% of even- and odd-mode velocity difference is shown. The improved wiggly-line concept is used to design a tight, tandem, 1.6dB coupler as a center stage of 3-stage symmetrical wideband, 6-18 GHz, 90- degree hybrid coupler implemented in microstrip coupled line topology using bond wires for the tandem section. The loose stage is designed using periodic, quasi-lumped, capacitively-loaded coupled lines. A CST simulation of each design step is shown.
KW - broadband directional couplers
KW - directivity enhancement
KW - wiggly-line
UR - http://www.scopus.com/inward/record.url?scp=85082651317&partnerID=8YFLogxK
U2 - 10.1109/COMCAS44984.2019.8958089
DO - 10.1109/COMCAS44984.2019.8958089
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AN - SCOPUS:85082651317
T3 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
BT - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
Y2 - 4 November 2019 through 6 November 2019
ER -