scholarly journals PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array

Micromachines ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 524
Author(s):  
Wei Zhou ◽  
Tao Zhang ◽  
Jun Ou-Yang ◽  
Xiaofei Yang ◽  
Dawei Wu ◽  
...  
Keyword(s):  
Composite Material ◽  
Single Crystal ◽  
Insertion Loss ◽  
Acoustic Impedance ◽  
High Frequency ◽  
Phased Array ◽  
Phased Arrays ◽  
Piezoelectric Composite ◽  
Fractional Bandwidth ◽  
Central Frequency

Based on a modified dice-and-fill technique, a PIN-PMN-PT single crystal 1-3 composite with the kerf of 12 μm and pitch of 50 μm was prepared. The as-made piezoelectric composite material behaved with high piezoelectric constant (d33 = 1500 pC/N), high electromechanical coefficient (kt = 0.81), and low acoustic impedance (16.2 Mrayls). Using lithography and flexible circuit method, a 48-element phased array was successfully fabricated from such a piezoelectric composite. The array element was measured to have a central frequency of 20 MHz and a fractional bandwidth of approximately 77% at −6 dB. Of particular significance was that this PIN-PMN-PT single crystal 1-3 composite-based phased array exhibits a superior insertion loss compared with PMN-PT single crystal and PZT-5H-based 20 MHz phased arrays. The focusing and steering capabilities of the obtained phased array were demonstrated theoretically and experimentally. These promising results indicate that the PIN-PMN-PT single crystal 1-3 composite-based high frequency phased array is a good candidate for ultrasound imaging applications.

scholarly journals PIN-PMN-PT Single Crystal 1-3 Composite based 20 MHz Ultrasound Phased Array

2019 ◽  
Author(s):  
Tao Zhang ◽  
Dawei Wu ◽  
Jun Ou-Yang ◽  
Xiaofei Yang ◽  
Benpeng Zhu
Keyword(s):  
Composite Material ◽  
Single Crystal ◽  
Insertion Loss ◽  
Acoustic Impedance ◽  
High Frequency ◽  
Phased Array ◽  
Phased Arrays ◽  
Piezoelectric Composite ◽  
Fractional Bandwidth ◽  
Central Frequency

Based on a modified dice-and-fill technique, a PIN-PMN-PT single crystal 1-3 composite with the kerf of 12μm and pitch of 50μm was prepared. The as-made piezoelectric composite material behaved high piezoelectric constant (d33=1500 pC/N), high electromechanical coefficient (kt=0.81) and low acoustic impedance (16.2 Mrayls). Using lithography and flexible circuit method, a 48-element phased array was successfully fabricated from such piezoelectric composite. The array element was measured to have a central frequency of 20MHz and a fractional bandwidth of approximately 77% at -6dB. Of particular significance was that this PIN-PMN-PT single crystal 1-3 composite based phased array exhibits a superior insertion loss compared with PMN-PT single crystal and PZT-5H based 20 MHz phased arrays. The focusing and steering capabilities of such phased array were validated through Field II simulations. These promising results suggest that the PIN-PMN-PT single crystal 1-3 composite based high frequency phased array is a good candidate for ultrasound imaging applications.

A Wideband Bandpass Filter Integrated Single-Pole Double-Throw Switch with Wide Stopband

Frequenz ◽  
2018 ◽  
Vol 72 (11-12) ◽  
pp. 533-537 ◽  
Author(s):  
Jin Xu ◽  
Qi-Hang Cai ◽  
Zhi-Yu Chen
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Fractional Bandwidth ◽  
Central Frequency ◽  
Resonant Frequencies ◽  
Capacitively Coupled ◽  
Filter Theory ◽  
Compact Size ◽  
Better Than ◽  
Coupled Resonator

Abstract This paper proposes a wideband bandpass filter (BPF) integrated single-pole double-throw (SPDT) switch by using the capacitively coupled LC resonators with loaded p-i-n diodes. The BPF-integrated on-state channel can be synthesized by using the coupled resonator filter theory, and the off-state channel with high suppression is built due to the misaligned resonant frequencies of LC resonators. As an example, a BPF-integrated SPDT switch is designed and fabricated with the central frequency of 1 GHz and the 3 dB fractional bandwidth of 29.7 %. The on-state channel has a measured insertion loss of 1.23 dB, and a 20 dB rejection wide stopband from 1.47 GHz to 8.6 GHz. The off state channel has a 43 dB suppression around 1 GHz. The isolation between two ports is better than 52.4 dB. The fabricated BPF-integrated SPDT switch size including bias circuits but excluding feeding lines has a compact size of 0.086 λg×0.096 λg.

scholarly journals Research and Fabrication of High-Frequency Broadband and Omnidirectional Transmitting Transducer

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2347 ◽  
Author(s):  
Shaohua Hao ◽  
Hongwei Wang ◽  
Chao Zhong ◽  
Likun Wang ◽  
Hao Zhang
Keyword(s):  
Composite Material ◽  
High Frequency ◽  
Wide Band ◽  
Simulation Software ◽  
Piezoelectric Composite ◽  
Voltage Response ◽  
Forming Process ◽  
Composite Ring ◽  
Matching Layer ◽  
Acoustic Transducer

A wide-band cylindrical transducer was developed by using the wide band of the composite material and the matched matching layer for multimode coupling. Firstly, the structure size of the transducer’s sensitive component was designed by using ANSYS simulation software. Secondly, the piezoelectric composite ring-shaped sensitive component was fabricated by the piezoelectric composite curved-surface forming process, and the matching layer was coated on the periphery of the ring-shaped piezoelectric composite material. Finally, it was encapsulated and the electrodes were drawn out to make a high-frequency broadband horizontal omnidirectional water acoustic transducer prototype. After testing, the working frequency range of the transducer was 230–380 kHz, and the maximum transmission voltage response was 168 dB in the water.

Design of a Wideband Vivaldi Antenna Array

2014 ◽  
Vol 668-669 ◽  
pp. 1253-1256
Author(s):  
Bo Zhang
Keyword(s):  
Antenna Array ◽  
High Frequency ◽  
Lattice Spacing ◽  
Phased Array ◽  
Phased Arrays ◽  
Wide Angle ◽  
Modular Construction ◽  
Phased Array Antenna ◽  
Grating Lobe ◽  
Vivaldi Antenna

Phased arrays for use in future multifunction systems require wideband elements capable of wide angle scanning. Here we describe the design of a Balance Antipodal Vivaldi Antenna for use in large phased array antenna apertures. The BAVA element height and the array lattice spacing are about λ/2 at the high frequency end of a grating-lobe free operating band. BAVA elements do not require connection with adjacent elements and are therefore attractive for use in phased arrays with modular construction.

scholarly journals Research on the performace of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 single crystal/polymer 1-3 piezoelectric composite material

2008 ◽  
Vol 57 (7) ◽  
pp. 4552
Author(s):  
Zhou Dan ◽  
Luo Lai-Hui ◽  
Wang Fei-Fei ◽  
Jia Yan-Min ◽  
Zhao Xiang-Yong ◽  
...  
Keyword(s):  
Composite Material ◽  
Single Crystal ◽  
Piezoelectric Composite ◽  
Crystal Polymer

A Quasi-Elliptic Bandpass Filter-Integrated Single-Pole Double-Throw Switch

Frequenz ◽  
2017 ◽  
Vol 71 (5-6) ◽  
Author(s):  
Yu-Xue Ji ◽  
Jin Xu ◽  
Zhao-Zhao Li ◽  
Huan Wang ◽  
Jin-Jie Huang
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Impedance Matching ◽  
Bandpass Filters ◽  
Design Approach ◽  
Fractional Bandwidth ◽  
Central Frequency ◽  
Low Insertion Loss ◽  
Parallel Configuration

AbstractThis paper proposes a quasi-elliptic bandpass filter-integrated single-pole double-throw (SPDT) switch. The series-parallel configuration of p-i-n diodes embedded into the impedance matching circuit is proposed to combine two quasi-elliptic response bandpass filters to constitute the proposed SPDT switch. To validate our design approach, a proposed quasi-elliptic bandpass filter-integrated SPDT switch is designed and fabricated with a central frequency of 1.25 GHz and a 3 dB fractional bandwidth of 16 %. Low insertion loss in the on state and good isolation in the off state are achieved. The switch size including bias circuits but excluding feeding lines is 0.447λ

scholarly journals Монолитный миниатюрный полосно-пропускающий фильтр на многопроводниковых полосковых резонаторах

2021 ◽  
Vol 47 (13) ◽  
pp. 16
Author(s):  
Б.А. Беляев ◽  
А.М. Сержантов ◽  
Ан.А. Лексиков ◽  
Я.Ф. Бальва ◽  
Р.Г. Галеев
Keyword(s):  
Fourth Order ◽  
Insertion Loss ◽  
High Frequency ◽  
High Selectivity ◽  
Bandpass Filter ◽  
Stop Band ◽  
Center Frequency ◽  
Fractional Bandwidth ◽  
Prototype Filter ◽  
Surface Mounting

A new monolithic design of a miniature bandpass filter has been developed for the multilayer PCB technology fabrication. The use of multi-conductor stripline resonators in the design provides not only miniaturization, but also high selectivity of the device, which is demonstrated on a prototype filter of the fourth order. The center frequency of the passband of the manufactured filter is f0 = 546 MHz, the fractional bandwidth is Δf / f0 = 25%, the insertion loss is 0.8 dB. The filter has an extended high-frequency stop band, which at a level of ‒30 dB extends up to a frequency of 10f0. The dimensions of the filter are 15.0×12.0×4.3 mm3 (0.027λ0×0.021λ0 ×0.007λ0, where λ0 is the wavelength in vacuum at the frequency f0), and its mass is only 1.8 g. The filter's characteristics and ease of construction for surface mounting prove its high prospects.

Sign in / Sign up

Export Citation Format

Share Document