Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 65, Issue 10, Pages 3569-3577Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2017.2731765
Keywords
Dual tunability; lead zirconate titanate (PZT); permalloy (Py); phase shifter; solenoid inductor
Categories
Funding
- National Science Foundation (NSF) [1253929]
- Office of Science, Office of Basic Energy Sciences, U.S. Department of Energy [DE-AC02-06CH11357]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1253929] Funding Source: National Science Foundation
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A Permalloy (Py) thin film enabled tunable 3-D solenoid inductor is designed and fabricated. The special configuration of magnetic core is discussed and by selectively patterning Py thin film, the proposed tunable inductor can work at frequency up to several GHz range. The inductance of the solenoid inductor can be electrically tuned by dc current and the tunability is above 10%. Utilizing the implemented Py enabled tunable solenoid inductor and Lead Zirconate Titanate thin film enabled metal-insulator-metal capacitor, a compact fully electrically tunable lumped elements phase shifter is achieved. The tunable phase shifter has both inductive and capacitive tunability and the dual tunability significantly improves the tuning range and design flexibility. Moreover, the dual tunability is able to retain the equivalent characteristic impedance of the device in the process of the phase being tuned. The phase of the device can be tuned by fully electrical methods and when dc current and dc voltage are provided, the length normalized phase tunability is up to 210 degrees/cm.
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