The signal transmission characteristics of embedded microstrip transmission lines over a meshed ground plane in copper/polyimide multichip module

Author(s):  
Chung-Ping Chien ◽  
A.F. Burnett ◽  
J.M. Cech ◽  
M.H. Tanielian
Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5216
Author(s):  
Juliana de Novais Schianti ◽  
Ariana L.C. Serrano ◽  
Daniel Orquiza de Carvalho ◽  
Rafael A. Penchel ◽  
Julio Mota Pinheiro ◽  
...  

We propose a novel platform for detecting as well as measuring the size of individual droplets in microfluidic channels using microstrip transmission lines. The most outstanding feature of our platform is that, as opposed to previous related works, its design allows for the droplet to flow in a microfluidic channel fabricated between the top strip and the ground plane of a microstrip transmission line. This provides enhanced interaction of the electromagnetic field with the detected droplets. The proposed design allows us to measure droplet size directly from the phase of the microwave signal, without the need for a resonator. The platform is based on low temperature co-fired ceramic (LTCC), which makes it more compatible with Radiofrequency (RF) and microwave technology than platforms used in previous works. With this platform, we are able to measure droplets as small as 150 µm in radius. It is worth pointing out that our device could also be used for detection, counting and measurement of other microscopic objects.


1990 ◽  
Vol 38 (9) ◽  
pp. 1366-1370 ◽  
Author(s):  
J.S. Roy ◽  
D.R. Poddar ◽  
A. Mukherjee ◽  
S.K. Chowdhury

2022 ◽  
Vol 43 (1) ◽  
pp. 012302
Author(s):  
K. S. Zhuravlev ◽  
A. L. Chizh ◽  
K. B. Mikitchuk ◽  
A. M. Gilinsky ◽  
I. B. Chistokhin ◽  
...  

Abstract The design, manufacturing and DC and microwave characterization of high-power Schottky barrier InAlAs/InGaAs back-illuminated mesa structure photodiodes are presented. The photodiodes with 10 and 15 μm mesa diameters operate at ≥40 and 28 GHz, respectively, have the output RF power as high as 58 mW at a frequency of 20 GHz, the DC responsivity of up to 1.08 A/W depending on the absorbing layer thickness, and a photodiode dark current as low as 0.04 nA. We show that these photodiodes provide an advantage in the amplitude-to-phase conversion factor which makes them suitable for use in high-speed analog transmission lines with stringent requirements for phase noise.


2011 ◽  
Vol 194-196 ◽  
pp. 2229-2232
Author(s):  
Qing Song Xiong ◽  
Zhao Hua Wu ◽  
Pin Chen ◽  
Sheng Zhang

The effect of loss of transmission line on the transmission signal can’t be ignored in microwave circuits. Based on the theory of loss and microwave network principle, the effect of the width, parallel length and space of transmission lines on the scattering parameters’ insertion loss is analyzed in perspective of scattering parameters of the odd mode and even mode. The simulation results show that: when the other parameters are fixed, both the characteristic impedance and the conductor loss decrease non-linearly with the line width broadening; due to the coupling effect between micro-strip lines, the first trough frequency of the scattering parameter S21 curved line, that is the point the signal energy attenuate most seriously, decreases linearly with line width broadening and increases non- linearly with line spaces broadening.


1992 ◽  
Vol 40 (1) ◽  
pp. 49-57 ◽  
Author(s):  
J.S. Bagby ◽  
C.-H. Lee ◽  
Y. Yuan ◽  
D.P. Nyquist

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