60 GHz reflection type phase shifter based on liquid crystal

S. Bulja; D. Mirshekar-Syahkal; M. Yazdanpanahi; R. James; S. E. Day; F. A. Fernández

doi:10.1109/RWS.2010.5434253

60 GHz reflection type phase shifter based on liquid crystal

S. Bulja
, D. Mirshekar-Syahkal
, M. Yazdanpanahi
, R. James
, S. E. Day
, F. A. Fernández

Research output: Chapter in Book/Report/Conference proceedings › Chapter › peer-review

Abstract

For the first time, a compact 60 GHz band phase shifter incorporating liquid crystal (LC) is presented. Based on the Reflection Type Phase Shifter (RTPS) structure, it comprises a 3-dB coupler and tunable reflective loads formed on a nematic LC substrate. The LC used to form the substrate is known as E7. Biasing of the LC is achieved using an external electric field, allowing for the control of the reactance of the reflective loads. To facilitate on-wafer measurements and the application of the electric field to the LC, a transition from the microstrip line to the CPW is used. Preliminary measurement results for this RTPS show a differential phase shift of over 130 degrees, a figure of merit of 11.4°/dB and return losses better than -10dB at 61 GHz.

Original language	English
Title of host publication	2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest
Pages	697-699
Number of pages	3
DOIs	https://doi.org/10.1109/RWS.2010.5434253
Publication status	Published - 2010
Externally published	Yes
Event	2010 IEEE Radio and Wireless Symposium, RWW 2010 - New Orleans, LA, United States Duration: 10 Jan 2010 → 14 Jan 2010

Publication series

Name	2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest

Conference

Conference	2010 IEEE Radio and Wireless Symposium, RWW 2010
Country/Territory	United States
City	New Orleans, LA
Period	10/01/10 → 14/01/10

Keywords

Dielectric anisotropy
Liquid crystal
Reflection type phase shifter

Access to Document

10.1109/RWS.2010.5434253

Cite this

Bulja, S., Mirshekar-Syahkal, D., Yazdanpanahi, M., James, R., Day, S. E., & Fernández, F. A. (2010). 60 GHz reflection type phase shifter based on liquid crystal. In 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest (pp. 697-699). Article 5434253 (2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest). https://doi.org/10.1109/RWS.2010.5434253

@inbook{bde3f70ea031494ca8faec6f210bd58e,

title = "60 GHz reflection type phase shifter based on liquid crystal",

abstract = "For the first time, a compact 60 GHz band phase shifter incorporating liquid crystal (LC) is presented. Based on the Reflection Type Phase Shifter (RTPS) structure, it comprises a 3-dB coupler and tunable reflective loads formed on a nematic LC substrate. The LC used to form the substrate is known as E7. Biasing of the LC is achieved using an external electric field, allowing for the control of the reactance of the reflective loads. To facilitate on-wafer measurements and the application of the electric field to the LC, a transition from the microstrip line to the CPW is used. Preliminary measurement results for this RTPS show a differential phase shift of over 130 degrees, a figure of merit of 11.4°/dB and return losses better than -10dB at 61 GHz.",

keywords = "Dielectric anisotropy, Liquid crystal, Reflection type phase shifter",

author = "S. Bulja and D. Mirshekar-Syahkal and M. Yazdanpanahi and R. James and Day, \{S. E.\} and Fern{\'a}ndez, \{F. A.\}",

year = "2010",

doi = "10.1109/RWS.2010.5434253",

language = "English",

isbn = "9781424447268",

series = "2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest",

pages = "697--699",

booktitle = "2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest",

note = "2010 IEEE Radio and Wireless Symposium, RWW 2010 ; Conference date: 10-01-2010 Through 14-01-2010",

}

Bulja, S, Mirshekar-Syahkal, D, Yazdanpanahi, M, James, R, Day, SE & Fernández, FA 2010, 60 GHz reflection type phase shifter based on liquid crystal. in 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest., 5434253, 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest, pp. 697-699, 2010 IEEE Radio and Wireless Symposium, RWW 2010, New Orleans, LA, United States, 10/01/10. https://doi.org/10.1109/RWS.2010.5434253

TY - CHAP

T1 - 60 GHz reflection type phase shifter based on liquid crystal

AU - Bulja, S.

AU - Mirshekar-Syahkal, D.

AU - Yazdanpanahi, M.

AU - James, R.

AU - Day, S. E.

AU - Fernández, F. A.

PY - 2010

Y1 - 2010

N2 - For the first time, a compact 60 GHz band phase shifter incorporating liquid crystal (LC) is presented. Based on the Reflection Type Phase Shifter (RTPS) structure, it comprises a 3-dB coupler and tunable reflective loads formed on a nematic LC substrate. The LC used to form the substrate is known as E7. Biasing of the LC is achieved using an external electric field, allowing for the control of the reactance of the reflective loads. To facilitate on-wafer measurements and the application of the electric field to the LC, a transition from the microstrip line to the CPW is used. Preliminary measurement results for this RTPS show a differential phase shift of over 130 degrees, a figure of merit of 11.4°/dB and return losses better than -10dB at 61 GHz.

AB - For the first time, a compact 60 GHz band phase shifter incorporating liquid crystal (LC) is presented. Based on the Reflection Type Phase Shifter (RTPS) structure, it comprises a 3-dB coupler and tunable reflective loads formed on a nematic LC substrate. The LC used to form the substrate is known as E7. Biasing of the LC is achieved using an external electric field, allowing for the control of the reactance of the reflective loads. To facilitate on-wafer measurements and the application of the electric field to the LC, a transition from the microstrip line to the CPW is used. Preliminary measurement results for this RTPS show a differential phase shift of over 130 degrees, a figure of merit of 11.4°/dB and return losses better than -10dB at 61 GHz.

KW - Dielectric anisotropy

KW - Liquid crystal

KW - Reflection type phase shifter

UR - https://www.scopus.com/pages/publications/77952334559

U2 - 10.1109/RWS.2010.5434253

DO - 10.1109/RWS.2010.5434253

M3 - Chapter

AN - SCOPUS:77952334559

SN - 9781424447268

T3 - 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest

SP - 697

EP - 699

BT - 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest

T2 - 2010 IEEE Radio and Wireless Symposium, RWW 2010

Y2 - 10 January 2010 through 14 January 2010

ER -

60 GHz reflection type phase shifter based on liquid crystal

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