http://scitation.aip.org/ RSI: Electronics; Electromagnetic Technology; Microwaves http://link.aip.org/link/?RSI/83/024708/1&agg=rss Burak Okcan, Georges Gielen, and Chris Van Hoof<br/> This paper presents a third-order switched-capacitor sigma-delta modulator implemented in a standard 0.35-[mu]m CMOS process. It operates from 300 K down to 4.2 K, achieving 70.8 dB signal-to-noise-plus-distortion ratio (SNDR) in a signal bandwidth of 5 kHz with a sampling frequency of 500 kHz at 30 ... [Rev. Sci. Instrum. 83, 024708 (2012)] published Thu Feb 9, 2012. http://link.aip.org/link/?RSI/83/024707/1&agg=rss Wei Li, Yong-gui Liu, Jun Zhang, Ting Shu, Han-wu Yang et al.<br/> Experimental investigation of the transparent cathode used in a relativistic magnetron with axial radiation is reported in this paper. The transparent cathode is composed of six separate stalks with the diameter of 6 mm. Under the working condition of 549 kV and ~0.38 T, the relativistic magnetron w ... [Rev. Sci. Instrum. 83, 024707 (2012)] published Tue Feb 7, 2012. http://link.aip.org/link/?RSI/83/024706/1&agg=rss Miao Miao, Zhou Wei, and Wang Bin<br/> For comparison of arbitrary frequency signals, the paper proposed two levels of length vernier based on the time-space relationship are used in three levels of phase coincidence detecting circuits to extract the phase coincidence information by proper logic calculation. The length/phase of each vern ... [Rev. Sci. Instrum. 83, 024706 (2012)] published Mon Feb 6, 2012. http://link.aip.org/link/?RSI/83/024705/1&agg=rss M. A. Elsayed, A. A. Neuber, J. C. Dickens, J. W. Walter, M. Kristiansen et al.<br/> The increased popularity of high power microwave systems and the various sources to drive them is the motivation behind the work to be presented. A stand-alone, self-contained explosively driven high power microwave pulsed power system has been designed, built, and tested at Texas Tech University's ... [Rev. Sci. Instrum. 83, 024705 (2012)] published Mon Feb 6, 2012. http://link.aip.org/link/?RSI/83/024704/1&agg=rss Katrin Steinberg, Marc Scheffler, and Martin Dressel<br/> A broadband microwave spectrometer has been constructed to determine the complex conductivity of thin metal films at frequencies from 45 MHz to 20 GHz working in the temperature range from 0.45 K to 2 K (in a He cryostat). The setup follows the Corbino approach: a vector network analyzer measures th ... [Rev. Sci. Instrum. 83, 024704 (2012)] published Fri Feb 3, 2012. http://link.aip.org/link/?RSI/83/024703/1&agg=rss Brian S. Kim, Wang Zhou, Yash D. Shah, Chuanle Zhou, N. I&#x015F;&#x0131;k et al.<br/> In this paper, a four-point characterization method is developed for samples that have either capacitive or ohmic contacts. When capacitive contacts are used, capacitive current- and voltage-dividers result in a capacitive scaling factor not present in four-point measurements with only ohmic contact ... [Rev. Sci. Instrum. 83, 024703 (2012)] published Thu Feb 2, 2012. http://link.aip.org/link/?RSI/83/024702/1&agg=rss P. Arpaia, L. Bottura, L. Fiscarelli, and L. Walckiers<br/> The fast digital integrator has been conceived to face most demanding magnet test requirements with a resolution of 10 ppm, a signal-to-noise ratio of 105 dB at 20 kHz, a time resolution of 50 ns, an offset of 10 ppm, and on-line processing. In this paper, the on-field achievements of the fast digit ... [Rev. Sci. Instrum. 83, 024702 (2012)] published Thu Feb 2, 2012. http://link.aip.org/link/?RSI/83/014701/1&agg=rss G. Ababei, H. Chiriac, V. David, V. Dafinescu, and I. Nica<br/> The shielding effectiveness of the omni-directional selective shielding material based on CoFe-glass coated amorphous wires in 0.8 GHz-3 GHz microwave frequency range is investigated. The measurements were done in a controlled medium using a TEM cell and in the free space using horn antennas, respec ... [Rev. Sci. Instrum. 83, 014701 (2012)] published Tue Jan 31, 2012. http://link.aip.org/link/?RSI/82/124705/1&agg=rss G. McKenzie and P. Record<br/> Electrical capacitive tomography (ECT) has been used to monitor sections of aircraft wiring, as a tool for prognostic analysis. To apply the principles of ECT across a cross section of only 4 mm, modification of the basic circuit was required. Additionally, a more novel method of placing the necessa ... [Rev. Sci. Instrum. 82, 124705 (2011)] published Fri Dec 30, 2011. http://link.aip.org/link/?RSI/82/124704/1&agg=rss Alexei Grigoriev, Mandana Meisami Azad, and John McCampbell<br/> We have developed a new approach to measure fast electrical signals during polarization switching in ferroelectric thin-film capacitors. This article describes a simple method for probing transient currents and voltages in a broad range of time scales from microseconds to hundreds of picoseconds. In ... [Rev. Sci. Instrum. 82, 124704 (2011)] published Wed Dec 14, 2011. http://link.aip.org/link/?RSI/82/124703/1&agg=rss T. H. Chang, H. W. Chao, F. H. Syu, W. Y. Chiang, S. C. Fong et al.<br/> To uncover the intriguing non-thermal microwave effect, an experiment was conducted using an amplifier rather than an oscillator as the radiation source, which was injected into an applicator with strong electromagnetic field enhancement. The characteristics of the applicator are discussed and the e ... [Rev. Sci. Instrum. 82, 124703 (2011)] published Tue Dec 13, 2011. http://link.aip.org/link/?RSI/82/124702/1&agg=rss Jing Yin, Cheng Liang Pan, Hong Bo Wang, and Zhi Hua Feng<br/> A static vector magnetometer based on two-dimensional (2D) vibrating coils actuated by a piezoelectric cantilever is presented. Two individual sensing coils are orthogonally fastened at the tip of cantilever and piezoelectric sheets are used to excite the cantilever bending. Due to off-axis coupler ... [Rev. Sci. Instrum. 82, 124702 (2011)] published Thu Dec 8, 2011. http://link.aip.org/link/?RSI/82/124701/1&agg=rss Xiang Deng, Dixiang Chen, and Wuqiang Yang<br/> Accurate measurement of multiphase flows, including gas/solids, gas/liquid, and liquid/liquid flows, is still challenging. In principle, electrical capacitance tomography (ECT) can be used to measure the concentration of solids in a gas/solids flow and the liquid (e.g., oil) fraction in a gas/liquid ... [Rev. Sci. Instrum. 82, 124701 (2011)] published Mon Dec 5, 2011. http://link.aip.org/link/?RSI/82/114702/1&agg=rss T. Kaltenbacher, F. Caspers, M. Doser, A. Kellerbauer, and W. Pribyl<br/> The paper addresses a novel method to couple a signal from charged particles in a Penning trap to a high Q resonant circuit using a crystal resonator. Traditionally, the trap capacity is converted into a resonator by means of an inductance. The tuned circuit's Q factor is directly linked to the inpu ... [Rev. Sci. Instrum. 82, 114702 (2011)] published Tue Nov 29, 2011. http://link.aip.org/link/?RSI/82/114701/1&agg=rss M. Ciszek and S. Trojanowski<br/> Steady state measurements of the high critical currents in superconducting composite wires and tapes might be burdened with some errors. The origin of the errors is mainly associated with the Joule heat generated at current leads contacts, which at high transport currents can considerably increase t ... [Rev. Sci. Instrum. 82, 114701 (2011)] published Fri Nov 18, 2011. http://link.aip.org/link/?RSI/82/104706/1&agg=rss T. Lindstrom, J. Burnett, M. Oxborrow, and A Ya. Tzalenchuk<br/> We present a new application and implementation of the Pound-locking technique for the interrogation of superconducting microresonators. We discuss how by comparing against stable frequency sources this technique can be used to characterize properties of resonators that cannot be accessed using trad ... [Rev. Sci. Instrum. 82, 104706 (2011)] published Wed Oct 26, 2011. http://link.aip.org/link/?RSI/82/104705/1&agg=rss B. I. Ivanov, M. Trgala, M. Grajcar, E. Il'ichev, and H.-G. Meyer<br/> An ultra-low-noise one-stage SiGe heterojunction bipolar transistor amplifier was designed for cryogenic temperatures and a frequency range of 10 kHz100 MHz. A noise temperature T [approximate] 1.4 K was measured at an ambient temperature of 4.2 K at frequencies between 100 kHz and 100 MHz for a sou ... [Rev. Sci. Instrum. 82, 104705 (2011)] published Tue Oct 25, 2011. http://link.aip.org/link/?RSI/82/104704/1&agg=rss Yin Huang, Xue Feng, and Binrui Qu<br/> Traditional interfacial toughness measurements for thin films on substrate are not appropriate to the structure composed of stiff films and soft substrate. This paper describes a new bending test system to measure the interfacial toughness for the soft interface between stiff films and elastomeric s ... [Rev. Sci. Instrum. 82, 104704 (2011)] published Tue Oct 18, 2011. http://link.aip.org/link/?RSI/82/104703/1&agg=rss J. Hunger, I. Cerjak, H. Schoenmaker, M. Bonn, and H. J. Bakker<br/> We describe a variable path length waveguide setup developed to accurately measure the complex dielectric permittivity of liquids. This is achieved by measuring the complex scattering parameter of the liquid in a waveguide section with a vector network analyzer in combination with an E-band frequenc ... [Rev. Sci. Instrum. 82, 104703 (2011)] published Thu Oct 13, 2011. http://link.aip.org/link/?RSI/82/104702/1&agg=rss S. Ya. Belomyttsev, A. A. Grishkov, B. M. Kovalchuk, N. N. Pedin, and A. A. Zherlitsyn<br/> Method of voltage measurement at a vacuum load by means of homogeneous short-circuited vacuum-isolated line was considered. Prior to appearance of a measured high-voltage pulse, a magnetic field is formed in the line due to the bias current. Biasing provides fulfillment of magnetic electron isolatio ... [Rev. Sci. Instrum. 82, 104702 (2011)] published Fri Oct 7, 2011. http://link.aip.org/link/?RSI/82/104701/1&agg=rss Yu Zhang, Jinliang Liu, Xuliang Fan, Hongbo Zhang, Shiwen Wang et al.<br/> In this paper, the electromagnetic dispersion theory and the classic telegraph equations were combined to calculate the important parameters of the helical Blumlein pulse forming line (BPFL) of accelerator based on tape helix. In the work band of the BPFL at several hundred ns range, electromagnetic ... [Rev. Sci. Instrum. 82, 104701 (2011)] published Mon Oct 3, 2011.