An Ultrasound Imaging Front-End System-on-a-Chip with Element-Level Impedance Matching for Acoustic Reflectivity Reduction

2021 ◽  
Author(s):  
Ahmad Rezvanitabar ◽  
M. Sait Kilinc ◽  
Coskun Tekes ◽  
Evren F. Arkan ◽  
Maysam Ghovanloo ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Impedance Matching ◽  
Element Level ◽  
Front End ◽  
System On A Chip

scholarly journals Optimum power transfer in RF front end systems using adaptive impedance matching technique

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Leyre Azpilicueta ◽  
Chan H. See ◽  
Raed Abd-Alhameed ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Adaptive Antenna ◽  
Power Transfer ◽  
Control Loops ◽  
Matching Networks ◽  
Front End ◽  
Rf Front End ◽  
Matching Technique ◽  
Digital Circuitry ◽  
Communications System

AbstractMatching the antenna’s impedance to the RF-front-end of a wireless communications system is challenging as the impedance varies with its surround environment. Autonomously matching the antenna to the RF-front-end is therefore essential to optimize power transfer and thereby maintain the antenna’s radiation efficiency. This paper presents a theoretical technique for automatically tuning an LC impedance matching network that compensates antenna mismatch presented to the RF-front-end. The proposed technique converges to a matching point without the need of complex mathematical modelling of the system comprising of non-linear control elements. Digital circuitry is used to implement the required matching circuit. Reliable convergence is achieved within the tuning range of the LC-network using control-loops that can independently control the LC impedance. An algorithm based on the proposed technique was used to verify its effectiveness with various antenna loads. Mismatch error of the technique is less than 0.2%. The technique enables speedy convergence (< 5 µs) and is highly accurate for autonomous adaptive antenna matching networks.

Tunable impedance matching network with wide impedance coverage for multi frequency standards RF front-end

2017 ◽  
Vol 82 ◽  
pp. 74-82 ◽  
Author(s):  
Yan Chiew Wong ◽  
Ranjit Singh Sarban Singh ◽  
Syafeeza Binti Ahmad Radzi ◽  
Norihan Binti Abdul Hamid
Keyword(s):  
Impedance Matching ◽  
Matching Network ◽  
Frequency Standards ◽  
Front End ◽  
Rf Front End ◽  
Tunable Impedance

Quadrature Synthetic Aperture Beamforming Front-End for Miniaturized Ultrasound Imaging

2018 ◽  
Vol 12 (4) ◽  
pp. 871-883
Author(s):  
Graham Peyton ◽  
Behzad Farzaneh ◽  
Hamid Soleimani ◽  
Martyn G. Boutelle ◽  
Emmanuel M. Drakakis
Keyword(s):  
Ultrasound Imaging ◽  
Synthetic Aperture ◽  
Front End

scholarly journals Highly Integrated Guidewire Ultrasound Imaging System-on-a-Chip

2020 ◽  
Vol 55 (5) ◽  
pp. 1310-1323
Author(s):  
Jaemyung Lim ◽  
Coskun Tekes ◽  
Evren F. Arkan ◽  
Ahmad Rezvanitabar ◽  
F. Levent Degertekin ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Imaging System ◽  
System On A Chip
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