声域墙增强调节的微波铁电器
Zongquan Gu1,2, Shishir Pandya3, Atanu Samanta4
1Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, USA.
Nature
|August 22, 2018
概括
铁电领域墙壁以前被视为一个问题,现在可以用来创建超低损失,高度调节的微波设备. 这一突破克服了电信设备的局限性,使得频率灵活性得到提升.
科学领域:
- 材料科学
- 凝聚物质物理学
- 电气工程
背景情况:
- 铁电极化和域壁对于电子设备至关重要,但传统上会导致高介电损失和歇斯底里.
- 现有的可调节介质通常需要在铁电库里温度以上或压电共振下运行,从而损害性能.
- 在可调节电介质装置中存在高调和低损失之间的权衡,限制了它们的优点.
研究的目的:
- 证明铁电域结构可以用于微波器件的超低损耗和特殊频率选择性.
- 通过利用域墙特性来克服传统调节性介电物的局限性.
- 为了实现千兆赫的微波调整性和低压电损失,
主要方法:
- 使用内在可调节的材料,其特性取决于纳米级域结构.
- 研究热力学预测的压力诱导的铁电领域壁变体.
- 测量千兆赫的微波可调性和介电损耗,以及质量因素.
主要成果:
- 实现了千兆赫的微波调制能力和介电损失,
- 由于域壁波动而不是压电振荡而超过理论极限的观测质量因素.
- 在一个单一的设备中,通过L,S和C微波波段 (1-8GHz) 的共振频率调节,增加了100倍的范围.
结论:
- 可以利用铁电域结构来实现超低损耗和高频选择性,克服以前的设备限制.
- 这些发现为开发超高频敏捷性和低损耗微波设备提供了有前途的战略.
- 利用纳米级域结构的相位空间为先进的电子设备设计提供了新的途径.
更多相关视频
10:40A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.7K
07:33Biological Sample Preparation by High-pressure Freezing, Microwave-assisted Contrast Enhancement, and Minimal Resin Embedding for Volume Imaging
Published on: March 19, 2019
11.4K
相关概念视频
Conservation of Protein Domains Over Different Proteins
14.6K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.6K
Resonance
65.7K
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
65.7K
Self-Evaluation: Self-Enhancement and Self-Verification
5.8K
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
5.8K
Plant Cell Wall
60.5K
The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.
60.5K
Membrane Domains
7.2K
The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...
7.2K
Three Developmental Domains
1.1K
Human development is typically examined across three main domains: physical, cognitive, and socio-emotional. These domains represent the significant areas of change and continuity throughout the lifespan, from infancy to late adulthood.
Physical Development
Physical processes, also known as maturation, encompass the biological changes that occur across an individual's life. These changes begin with genetic inheritance and continue through various stages, including growth in height and weight,...
Physical Development
Physical processes, also known as maturation, encompass the biological changes that occur across an individual's life. These changes begin with genetic inheritance and continue through various stages, including growth in height and weight,...
1.1K
