PNA-X测试放大器噪声系数

[{"insert":"l 测试系统介绍\n测试环境：\n       PNA-X网络分析仪 N5247B  OPT:425,029,S93029B\n       放大器芯片夹具\n       功率计+探头 E4418B+E4413A\n       校准件 85052D\n       电源 E3631A\n被测件：DF782封装放大器芯片\n        频率 50MHz--4GHz\n        增益 12.2dB@1GHz\n        噪声系数 4.5dB@1GHz\n        供电 5V\n夹具及被测件：\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-NOU7R2Xx62ff33eb587bd.png"}},{"insert":"\n整体系统搭建如下：\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-9hLu47v662ff342b78642.png"}},{"insert":"\nl 测试步骤\n1.在N5247B上按Meas案件，选择Noise Figure Cold Source，点击OK进入NF测试界面\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-tid2K8CN62ff347e1876f.png"}},{"insert":"\n2. 进入测试界面后设置测试频率10MHz--4GHz及扫描点数100\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-ezKyTSFW62ff34a627ffe.png"}},{"insert":"\n3. 设置功率（Port1输出-20dBm，DUT output 0dBm）\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-IzP0BNb162ff34cbd315a.png"}},{"insert":"\n4. Noise Figure设置\n   噪声接收机选择029（噪声接收机），如果没有029选件，也可以选择标准接收机\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-kLno7vUT62ff34ef9dcd9.png"}},{"insert":"\n5. N5247B的Port1/2都连接好射频线，功率计通过GPIB线连接到N5247B的GPIB0(Controller)，探头E4413A连接到功率计归零校准。之后即可进行校准操作，选择CAL--Other CAL--CAL ALL\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-QNsLPrKG62ff351ae2385.png"}},{"insert":"\n6. 进入噪声系数冷源法校准步骤\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-QpD6He9f62ff35468686c.png"}},{"insert":"\n7. 在校准设置里选择使用功率计\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-F5NGAwYg62ff3564af153.png"}},{"insert":"\n8. 下一步源和接收机衰减器设置默认\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-Col16p4762ff359ea8592.png"}},{"insert":"\n9. 校准件选择85052D\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-Jom7lF6z62ff35bfd8ae9.png"}},{"insert":"\n10. 功率校准容限默认\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-UEMX6W6A62ff35dc2b37a.png"}},{"insert":"\n11. 默认，下一步\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-iCrG7Yk162ff35fed463c.png"}},{"insert":"\n12. Port1功率校准\n把E4413A功率探头接到Port1端口的射频线上\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-wMQV7sBH62ff361d8ddd6.png"}},{"insert":"\n点击measure\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-1OPZIYV462ff3661d8c45.png"}},{"insert":"\n进行功率校准\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-wXRbOf4X62ff3692467fb.png"}},{"insert":"\n13. 接收机校准，Port1和Port2对接，通过校准过的Port1对Port2的噪声接收机进行校准\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-CEmRYFyb62ff36bb7cb65.png"}},{"insert":"\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-WFpKiagp62ff36e24c79e.png"}},{"insert":"\n点击测量进行校准\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-uCJGU9Hr62ff370857aa5.png"}},{"insert":"\n14. 用校准件分别校准Port1和Port2\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-9WZKTxmm62ff3735b2139.png"}},{"insert":"\n点击Finish\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-SmrOzRhX62ff376b83ed8.png"}},{"insert":"\n15. 校准传输，使用直通连接Port1和Port2，点击OK\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-qveBXeFH62ff37953503f.png"}},{"insert":"\n16. 校准完成\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-FGCvGgdp62ff37b2e7c4b.png"}},{"insert":"\n此时，我们可以看到NF基本为0dB的状态（Port1,2对接）\n17. 把DUT放到夹具里，压紧，电源E3631A输出5V,即可测得放大器芯片的噪声系数和增益\n噪声系数测量\nDUT起始频率是50MHz，可以测得1GHz时NF值为4.67dB（在2.4GHz左右有两个尖峰是因为被测件及夹具未放置在屏蔽箱内，有外界干扰信号影响,也会导致噪声接收机过载）\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-vLki1sgR62ff37ece0332.png"}},{"insert":"\n增益测量\n测得DUT在1GHz时，增益为12.33dB\n"},{"insert":{"image":"https://www.eteforum.com/image/show/attachments-2022-08-X49E7LC362ff381643035.png"}},{"insert":"\n"}]