循环偏振双极阵列天线与偏振转换技术的新方法
Farshad Ghaedi1, Aliakbar Dastranj2
1Electrical Engineering Department, Faculty of Engineering, Yasouj University, Yasouj, 75918-74831, Iran.
Scientific reports
|May 5, 2025
概括
这项研究介绍了一种紧的循环极化打印双极阵列天线 (CP-PDA) 带有碎形灵感的元素. 这种新的设计实现了宽带和高极化纯度,适用于无线通信系统.
科学领域:
- 电磁学和天线理论
- 微波工程 微波工程
- 无线通信系统无线通信系统
背景情况:
- 印刷双极阵列天线对于现代无线应用至关重要.
- 同时实现宽带宽和高极化纯度仍然是一个设计挑战.
- 现有的设计通常会在特定频段的尺寸或性能上妥协.
研究的目的:
- 开发一个紧的循环极化印刷双极阵列天线 (CP-PDA).
- 为了提高带宽和极化纯度,使用碎形灵感元素和寄生结构.
- 为了验证设计的性能,用于各种无线通信标准.
主要方法:
- 利用碎形灵感的双极臂,由堆叠的圆组成,以增加有效的电长和带宽.
- 嵌入了阶梯形的寄生元件,以促进线性向圆形的偏振转换.
- 实施了一种连续旋转的养网络,配有威尔金森功率分隔器和相位变换器,以实现精确的分期.
- 在FR4和罗杰斯RO4003基板上制造了原型天线,使用标准PCB蚀刻.
主要成果:
- 实现了 41.12% (1.99-3.02 GHz) 的宽阻抗带宽和 35.02% (2.12-3.02 GHz) 的轴比带宽.
- 证明高极化纯度超过27dB与右侧圆极化 (RHCP).
- 在2.55 GHz获得14.16dBic的峰值增益,与模拟结果一致.
- 在实际的制造公差下确认了强大的性能.
结论:
- 拟议的CP-PDA有效地整合了碎形几何和寄生元素,以提高性能.
- 该天线的宽带宽和高极化纯度使其适用于WLAN,ISM和卫星应用.
- 该设计为需要抵御极化不匹配和多路径色的系统提供了实用解决方案.
相关概念视频
Potential Due to a Polarized Object
349
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
349
Dielectric Polarization in a Capacitor
4.5K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.5K
Induced Electric Dipoles
4.1K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.1K
Mesh Analysis for AC Circuits
312
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
312
Calculations of Electric Potential II
1.6K
An electric dipole is a system of two equal but opposite charges, separated by a fixed distance. This system is used to model many real-world systems, including atomic and molecular interactions. One of these systems is the water molecule, but only under certain circumstances. These circumstances are met inside a microwave oven, where electric fields with alternating directions make the water molecules change orientation. This vibration is equivalent to heat at the molecular level.
Consider a...
Consider a...
1.6K
Polar and Cylindrical Coordinates
14.2K
The Cartesian coordinate system is a very convenient tool to use when describing the displacements and velocities of objects and the forces acting on them. However, it becomes cumbersome when we need to describe the rotation of objects. So, when describing rotation, the polar coordinate system is generally used.
14.2K


