基于LTCC技术的宽带功率分配器的研究

A Research of Bandpass Filter with Miniaturization and High Performance Based on stripline configuration

科学技术的腾飞带来了更严标准的设备需求,本文基于先进的LTCC技术,提出了一种宽带功率分配器的实现方法,在保证足够带宽的同时,使得元器件的体积可以尽可能的减小。以Wilkinson功分器的奇偶模阻抗概念为理论基础,通过在偶模条件下求解阻抗比为2:1的阻抗变换和奇模条件下求解阻抗匹配的方法,设计出所需的功率分配器。先进的LTCC加工技术大大缩小了此款宽带功率分配器的尺寸。借助电路仿真并在电磁场三维仿真软件上进行优化,宽带功率分配器的实物测试结果与HFSS仿真结果很好的吻合,在2.8-3.7GHz的带宽内功率分配损耗小于0.5d B,隔离度大于15 d B,输入端口反射系数小于-15d B,尺寸仅为3.2mm×1.6mm×0.9 mm。

With the continuous progress of technology,modern communication technology has increasingly demand for high- level equipment. A method for power divider with wide- band based on LTCC is proposed in this paper. This technology makes its size as small as possible while ensuring the wide- band of the power divider. By the Odd- even mode impedance theory,the analysis and design of Wilkinson power divider was transformed to solve questions of impedance matching In order to ensure its miniaturization,this power divider is based on the LTCC technology which is advance in the world. Using the circuit simulation and 3D simulation software to optimize and simulate,the measured results of the wide- band power divider satisfy its performance requirement. The power loss is less than 0. 5d B,the isolation is bet-ter than 15 d B and the reflection coefficient is lower than- 15 d B. Size only 3. 2mm × 1. 6mm × 0.9mm.