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[原创]ADI ADMV8818 2GHz-18GHz数字可调低通和高通滤波器解决方案

关键词:无线通信 MMIC 测试测量设备 雷达 卫星通信 工业和医疗设备 ADI ADMV8818

时间:2020-12-21 12:36:37       来源:中电网

ADI公司的ADMV8818是全集成单片微波集成电路(MMIC),具有数字可选择的频率操作.器件有四个单独控制的高通滤波器(HPF)和四个单独控制的低通滤波器(LPF),频率范围从2GHz到18GHz.ADMV8818灵活的架构允许高通和低通滤波器的3dB 截止频率(f3dB)能单独控制,以得到高达4GHz带宽.每个滤波器的数字逻辑控制是4位宽(16态)和控制片上电抗元件,以调整f3dB.典型的插入损耗为9dB,宽带抑制是35dB,这对最小化系统失真是非常理想的.这个可调滤波器可用作小型化来替代大型开关滤波器和可调腔滤波器,为先进的通信应用提供了可调解决方案.主要用在测试和测量设备,军用雷达,电子战和电子对抗,卫星通信和空间通信以及工业与医疗设备.本文介绍了ADMV8818主要特性,功能框图,以及LPF3,HPF1和LPF1与HPF3及LPF2的配置图,以及评估板ADMV8818-EVALZ主要特性,实验室建立图,电路图,材料清单和PCB设计图.

 

 The ADMV8818 is a fully monolithic microwave integrated circuit (MMIC) that features a digitally selectable frequency of operation. The device features four independently controlled high-pass filters (HPFs) and four independently controlled low-pass filters (LPFs) that span the 2 GHz to 18 GHz frequency range.

The flexible architecture of the ADMV8818 allows the 3 dB cutoff frequency (f3dB) of the high-pass and low-pass filters to be controlled independently to generate up to 4 GHz of bandwidth. The digital logic control on each filter is 4 bits wide (16 states) and controls the on-chip reactive elements to adjust the f3dB. The typical insertion loss is 9 dB, and the wideband rejection is 35 dB, which is ideally suited..

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