scholarly journals 10 MHz Ultrasound Linear Array Design for Medical Application

2019 ◽  
Vol 17 (12.2) ◽  
pp. 1
Author(s):  
Khuong Thi Thao Pham
Keyword(s):  
Piezoelectric Material ◽  
Active Layer ◽  
Linear Array ◽  
Medical Application ◽  
Ultrasound Transducer ◽  
Beam Forming ◽  
Single Element ◽  
3D Fem ◽  
Array Design ◽  
1D Model

This report represents a design and simulation of 10 MHz ultrasound transducer for medical application. The array is designed with 64 elements of 50µm width, 25µm kerf and 1mm elevation for each element. This results in the total transducer dimension of 1mm x 4.8mm. Piezoelectric material PZT 5H is chosen as the active layer while commercial materials named Ecosorb-MF116 and Polystyrene Fostarene-50 are chosen as two matching layers. Transducer’s 1D model using XTrans design toolbox and 3D FEM Comsol models (charge and voltage control) are investigated both accounted the effect of the 500nm electrode layers. Single element and array beam forming are calculated using Field II. A simulation of phantom imaging is observed using the transducer.

scholarly journals High gain 5G MIMO antenna for mobile base station

2019 ◽  
Vol 9 (1) ◽  
pp. 468 ◽  
Author(s):  
Yusnita Rahayu ◽  
Indah Permata Sari ◽  
Dara Incam Ramadhan ◽  
Razali Ngah
Keyword(s):  
Linear Array ◽  
Multiple Input Multiple Output ◽  
High Gain ◽  
Base Station ◽  
Impedance Bandwidth ◽  
Single Element ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Mobile Base Station ◽  
Mobile Base

This article presented a millimeter wave antenna which operated at 38 GHz for 5G mobile base station. The MIMO (Multiple Input Multiple Output) antenna consisted of 1x10 linear array configurations. The proposed antenna’s size was 88 x 98 mm^2  and printed on 1.575 mm-thick Rogers Duroid 5880 subsrate with dielectric constant of ε_r= 2.2 and loss tangent (tanδ) of 0.0009. The antenna array covered along the azimuth plane to provide the coverage to the users in omnidirection. The simulated results showed that the single element antenna had the reflection coefficient (S11) of -59 dB, less than -10 dB in the frequency range of 35.5 - 39.6 GHz. More than 4.1 GHz of impedance bandwidth was obtained. The gain of the antenna linear array was 17.8 dBi while the suppression of the side lobes was -2.7 dB.  It showed a high array gain throughout the impedance bandwidth with overall of VSWR were below 1.0646. It designed using CST microwave studio.

Pyroelectric single-element and linear-array sensors based on P(VDF/TrFE) thin films

1994 ◽  
Vol 45 (3) ◽  
pp. 209-218 ◽  
Author(s):  
Reinhard Köhler ◽  
Norbert Neumann ◽  
Günter Hofmann
Keyword(s):  
Thin Films ◽  
Linear Array ◽  
Single Element

Sparse Linear Array Design via Membrane Algorithm

2019 ◽  
Author(s):  
Na Gan ◽  
Guolong Cui ◽  
Jing Yang ◽  
Xianxiang Yu ◽  
Lingjiang Kong
Keyword(s):  
Linear Array ◽  
Array Design ◽  
Membrane Algorithm ◽  
Sparse Linear Array

scholarly journals A 3D-printed passive ultrasound phase-interference compensator for reduced wave degradation in cancellous bone – an experimental study in replica models

2018 ◽  
Vol 9 ◽  
pp. 204173141876641 ◽  
Author(s):  
Christian M Langton ◽  
Saeed M AlQahtani ◽  
Marie-Luise Wille
Keyword(s):  
Transit Time ◽  
Cancellous Bone ◽  
Broadband Ultrasound Attenuation ◽  
Quantitative Measure ◽  
Ultrasound Transducer ◽  
Single Element ◽  
Ultrasound Wave ◽  
Additional Material ◽  
Phase Interference ◽  
3D Printed

The current ‘active’ solution to overcome the impediment of ultrasound wave degradation associated with transit-time variation in complex tissue structures, such as the skull, is to vary the transmission delay of ultrasound pulses from individual transducer elements. This article considers a novel ‘passive’ solution in which constant transit time is achieved by propagating through an additional material layer positioned between the ultrasound transducer and the test sample. To test the concept, replica models based on four cancellous bone natural tissue samples and their corresponding passive ultrasound phase-interference compensator were 3D-printed. Normalised broadband ultrasound attenuation was used as a quantitative measure of wave degradation, performed in transmission mode at a frequency of 1 MHz and yielding a reduction ranging from 57% to 74% when the ultrasound phase-interference compensator was incorporated. It is suggested that the passive compensator offers a broad utility and, hence, it may be applied to any ultrasound transducer, of any complexity (single element or array), frequency and dimension.

Near- and far-field beam forming using a linear array in deep and shallow water

2014 ◽  
Vol 135 (4) ◽  
pp. 2393-2393
Author(s):  
Richard L. Culver ◽  
Brian E. Fowler ◽  
D. Chris Barber
Keyword(s):  
Shallow Water ◽  
Linear Array ◽  
Beam Forming ◽  
Far Field

Solar Spectrum Splitting Parallel Junction High Efficiency Concentrating Photovoltaics

2012 ◽  
Vol 1391 ◽  
Author(s):  
Lirong Z. Broderick ◽  
Marco Stefancich ◽  
Dario Roncati ◽  
Brian R. Albert ◽  
Xing Sheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Linear Array ◽  
Low Cost ◽  
Spectral Band ◽  
Solar Spectrum ◽  
Optical Loss ◽  
Single Element ◽  
Si Substrate ◽  
Spectrum Splitting

ABSTRACTA compact, single element concentrator comprising a near linear array of prisms has been designed to simultaneously split and concentrate the solar spectrum. Laterally aligned solar cells with different bandgaps are devised to be fabricated on a common Si substrate, with each cell absorbing a different spectral band optimized for highest overall power conversion efficiency. Epitaxial Ge on Si is used as a low cost virtual substrate for III-V materials growth. Assuming no optical loss for the prism concentrator, no shadowing and perfect carrier collection for the solar cells, simulations show that 39% efficiency can be achieved for a parallel four-junction (4PJ) InGaP-GaAs-Si-Ge cell under 200X concentration, and higher efficiency is possible with more junctions.

Sign in / Sign up

Export Citation Format

Share Document