scholarly journals Review Board Process Code

2020 ◽  
Author(s):  
Keyword(s):  
Board Process

Substrate-integrated waveguide cross-coupled filters with mixed electric and magnetic coupling structure

2018 ◽  
Vol 10 (8) ◽  
pp. 896-903 ◽  
Author(s):  
Amit Ranjan Azad ◽  
Dharmendra Kumar Jhariya ◽  
Akhilesh Mohan
Keyword(s):  
Printed Circuit Board ◽  
Single Layer ◽  
Magnetic Coupling ◽  
Frequency Selectivity ◽  
Circuit Board ◽  
Substrate Integrated Waveguide ◽  
Transmission Zeros ◽  
Coupling Structure ◽  
Board Process ◽  
Good Agreement

AbstractThis paper presents a substrate-integrated waveguide (SIW) mixed electric and magnetic coupling structure implemented on a single-layer substrate to create finite transmission zeros (TZs), which can be used to design microwave filters with higher frequency selectivity. Mixed coupling is realized by three slot-lines on the top metal plane combined with an iris-window between two adjacent SIW cavities. The electric and magnetic coupling can be separately controlled by adjusting the dimensions of the slot-lines and the width of the iris-window, and a controllable TZ below or above the passband can be produced. Furthermore, a detailed analysis of the mixed coupling structure is presented. To demonstrate the validity of the proposed structure, third- and fourth-order cross-coupled generalized Chebyshev bandpass filters are designed and fabricated using the standard printed circuit board process. The experimental results are in good agreement with the simulation results. The filters exhibit simple structure and good frequency selectivity.

Compact SIW directional filter using substrate integrated circular cavities

2020 ◽  
Vol 12 (5) ◽  
pp. 352-355
Author(s):  
Mohammad Sajjad Bayati ◽  
Tahsin Khorand
Keyword(s):  
Printed Circuit Board ◽  
Simple Structure ◽  
Circuit Board ◽  
Circular Cavity ◽  
Printed Circuit ◽  
Directional Filter ◽  
Compact Size ◽  
Degenerate Modes ◽  
Board Process ◽  
Better Than

AbstractIn this paper, a novel directional filter (DF) is proposed and implemented using substrate integrated waveguide (SIW) technology which exhibits the advantages of compact size and simple structure. The proposed DF is realized by two half mode substrate integrated waveguides (HMSIWs) and two substrate integrated circular cavity (SICC) resonators operating in the TM110 degenerate modes in which an aperture is utilized to realize the coupling between HMSIWs and SICCs. Two slotlines with appropriate dimensions, etched on the top and bottom planes, are utilized in order to control coupling strength between two cascaded SICC resonators. The proposed two-circular cavity SIW DF at 12.3 GHz is designed and fabricated with a normal printed circuit board process. Measured and simulated results indicate that the DF has a 3.25% bandwidth, and the return loss as well as isolation are better than 10.5 and 15 dB, respectively.

scholarly journals Using Multilayered Substrate Integrated Waveguide to Design Microwave Gain Equalizer

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yongfei Wang ◽  
Dongfang Zhou ◽  
Yi Zhang ◽  
Chaowen Chang
Keyword(s):  
Equivalent Circuit ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Substrate Integrated Waveguide ◽  
Equivalent Circuit Analysis ◽  
Compact Structure ◽  
Printed Circuit ◽  
Board Process ◽  
Insight Into ◽  
Ku Band

This paper presents the design and experiment of a novel microwave gain equalizer based on the substrate integrated waveguide (SIW) technique. The proposed equalizer is formed by an SIW loaded by SIW resonators, which has very compact structure and can compensate for gain slope of microwave systems. Equivalent circuit analysis is given about the proposed structure for a better insight into the structure’s response. A Ku-Band equalizer with four SIW resonators is simulated and fabricated with a multilayer printed circuit board process. The measured results show good performance and agreement with the simulated results; an attenuation slope of −4.5 dB over 12.5–13.5 GHz is reached with a size reduction of 76%.

scholarly journals Paying Project Participants: Dilemmas in Research with Poor, Marginalized Populations

10.18060/1897 ◽  
2011 ◽  
Vol 12 (2) ◽  
pp. 218-225
Author(s):  
Lara Descartes ◽  
Marysol Asencio ◽  
Thomas O. Blank
Keyword(s):  
Low Income ◽  
Monetary Incentives ◽  
Research Practice ◽  
Marginalized Populations ◽  
Institutional Review ◽  
Screening Questions ◽  
The Impact ◽  
Responsible Research ◽  
Board Process

This paper presents a case study about issues that can arise in research with marginalized populations. We use our experiences during a focus group conducted with low-income men to discuss how using monetary incentives can lead to ethical and methodological dilemmas, including participants’ misrepresentation of their demographic backgrounds to match study criteria. We address difficulties caused by the Institutional Review Board process’ inability to account for unanticipated circumstances during fieldwork. We note that any resolution of such dilemmas must prioritize responsible research practice and protecting participants. We also note the need for more research on the impact and ethics of monetary and other incentives in recruiting participants for studies such as ours that include populations from diverse socioeconomic backgrounds. The issues raised in this paper have implications for those considering research design, especially concerning incentives and screening questions.

Principle and structure of a printed circuit board process–based piezoelectric microfluidic pump integrated into printed circuit board

2019 ◽  
Vol 30 (17) ◽  
pp. 2595-2604 ◽  
Author(s):  
Dai-Hua Wang ◽  
Lian-Kai Tang ◽  
Yun-Hao Peng ◽  
Huai-Qiang Yu
Keyword(s):  
Flow Rate ◽  
Printed Circuit Board ◽  
Flow Characteristics ◽  
Circuit Board ◽  
Microfluidic Systems ◽  
Printed Circuit ◽  
Board Processes ◽  
Voltage Frequency ◽  
Instantaneous Flow Rate ◽  
Board Process

Considering mature printed circuit board processes, researches on microfluidic pumps that can be integrated into printed circuit board will provide a solution for further miniaturization and integration of microfluidic systems with low costs. The principle and structure of a printed circuit board process–based piezoelectric microfluidic pump integrated into printed circuit board are proposed and realized in this article. The printed circuit board process–based design and manufacturing technology of a piezoelectric microfluidic pump integrated into printed circuit board is researched utilizing printed circuit board as a platform. The flow characteristics of the fabricated microfluidic pump are experimentally tested. The research results show that the proposed principle and structure of the piezoelectric microfluidic pump can be fabricated utilizing mature printed circuit board process with advantages of simple structure and convenient processing. The fabricated printed circuit board process–based microfluidic pump can linearly pump in and pump out fluid with self-injection. Moreover, the flow rate and back pressure can be controlled by changing the peak-to-peak value, frequency, and phase difference of the driving voltages. The instantaneous flow rate has the pulsation property consistent with the drive voltage frequency. The proposed principle and structure are beneficial to integrate the fabricated printed circuit board process–based microfluidic pump with other microfluidic components to realize complicated microfluidic systems on printed circuit board.

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