Zobrazeno 1 - 10
of 2 046
pro vyhledávání: '"Network analyzer (electrical)"'
Autor:
Jelena Senic, Jeanne T. Quimby, Kate A. Remley, Dylan F. Williams, Diogo C. Ribeiro, Ruoyu Sun
Publikováno v:
IEEE Trans Antennas Propag
A new comparison-to-reference performance verification technique compares an E-band channel-sounder and reference vector network analyzer measurements of the same controlled, static channel. This new technique reduces the number of inaccurate assumpt
Autor:
James A. Bankson, Galen D. Reed, Zhan Xu, Keith A. Michel, Collin J. Harlan, Christopher M. Walker
Publikováno v:
Medical Physics. 48:4900-4908
Purpose A specialized Helmholtz-style 13 C volume transmit "clamshell" coil is currently being utilized for 13 C excitation in pre-clinical and clinical hyperpolarized 13 C MRI studies aimed at probing the metabolic activity of tumors in various targ
Autor:
Yuanhao Wang, Zhisen Zhang, Guangyan Liu, Pengliang Sun, Quande Che, Meijia Wang, Zhentao Huang
Publikováno v:
Journal of Materials Science: Materials in Electronics. 32:20912-20917
In this paper, α-CaSiO3/Al2O3-Li2CO3 was prepared by traditional solid-state method with Li2CO3 as low-temperature sintering aid added to α-CaSiO3/Al2O3 ceramics. The effects of different Li2CO3 content on the sintering properties, microstructure,
Publikováno v:
Wireless Personal Communications. 121:597-619
This paper is presented a Compact Wideband Rectangular Microstrip Antenna for the S and C Bands Applications. This proposed antenna has designed by Optimized Defected Ground Structure, tempered feedline as feed technique and superstrate with reflecto
Autor:
Arjuna Madanayake, John L. Volakis, Udara De Silva, Sravan Pulipati, Shubhendu Bhardwaj, Haixiang Zhao, Soumyajit Mandal, Satheesh Bojja Venkatakrishnan
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 69:2253-2266
Full-duplex (FD) antenna arrays are desirable for expanding the channel capacity of wireless systems up to 2, which is particularly important in the crowded sub-6-GHz spectral bands. Conventional FD solutions based on circulators do not scale to ante
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 69:1846-1859
We present improved methods for built-in test and calibration of phased arrays in free-space using a code-modulated embedded test (CoMET). Our approach employs the Cartesian modulation of test signals within each element using existing phase shifters
Publikováno v:
Wireless Personal Communications. 118:3457-3467
In this paper, we have presented the design and analysis of a Tri-band band pass filter at L, S and C bands. A cascaded form of a basic six mode resonator and hair pin resonator is used for the design. The cascaded layout ensures that it can generate
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 70:1-11
A calibration method for square or circular waveguide-based dual-polarized probes is proposed based on the 16-term network analyzer calibration model, allowing systematic errors, such as polarization impurity and mismatches to be corrected. The uniqu
Publikováno v:
IEEE Access, Vol 9, Pp 31513-31524 (2021)
A microwave sensor realized in monolithic technology, intended for permittivity estimation with the use of a highly sensitive coupled-line section, is presented in this paper. It also contains a dedicated measurement circuitry realized as a five-port
Autor:
Nagma Vohra, Magda El-Shenawee
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 70:1-10
This work presents a characterization technique of highly conductive material in the K- and $W$ -bands. The transmission line theory model is modified to adapt to the phase challenges observed in the measured S-parameters at high frequency. The S-par