Title :
Magnetic tunnel junction-based on-chip microwave phase and spectrum analyzer
Author :
Xin Fan ; Yunpeng Chen ; Chong Bi ; Yunsong Xie ; Kolodzey, J. ; Wilson, Jared D. ; Simons, Rainee N. ; Huaiwu Zhang ; Xiao, John Q.
Author_Institution :
Dept. of Phys. & Astron., Univ. of Delaware, Newark, DE, USA
Abstract :
A magnetic tunnel junction (MTJ)-based microwave detector is proposed and investigated. When the MTJ is excited by microwave magnetic fields, the relative angle between the free layer and pinned layer alternates, giving rise to an average resistance change. By measuring the average resistance change, the MTJ can be utilized as a microwave power sensor. Due to the nature of ferromagnetic resonance, the frequency of an incident microwave is directly determined. In addition, by integrating a mixer circuit, the MTJ-based microwave detector can also determine the relative phase between two microwave signals. Thus, the MTJ-based microwave detector can be used as an on-chip microwave phase and spectrum analyzer.
Keywords :
ferromagnetic resonance; magnetic tunnelling; microwave detectors; microwave mixers; spectral analysers; MTJ-based microwave detector; average resistance change; ferromagnetic resonance; free layer; incident microwave; magnetic tunnel junction-based microwave detector; microwave magnetic fields; microwave power sensor; microwave spectrum analyzer; mixer circuit; on-chip microwave phase analyzer; pinned layer; Coplanar waveguides; Frequency measurement; Magnetic films; Magnetic tunneling; Microwave amplifiers; Microwave filters; Microwave measurement; Ferromagnetic resonance; Interference; Magnetic tunnel junction (MTJ); Spin wave;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848560
