原标题：Linear LTC5552 3-20GHz微波混频器解决方案

　　Linear公司的LTC5552是宽带DC-6GHz IF的3-20GHz高性能微波双平衡无源混频器,可用作频率下变换或上变换.器件具有高IIP3,在10GHz为22.5dBm,17GHz为18.3dBm,10GHz的变换损耗8dB,工作电源3.3V/132mA,主要用在5G宽带无线接入,微波收发器,无线回程线路,点对点微波,相阵列天线,C,X和Ku波段RADAR,测试设备和卫星调制解调器.本文介绍了LTC5552主要特性,功能框图,标准测试电路图和应用电路以及演示电路DC2668A主要特性,上/下变换混频双音测量建立图,电路图和材料清单.

　　The LTC®5552 is a high performance, microwave doublebalanced passive mixer that can be used for frequencyupconversion or downconversion. The device is similarto the LTC5553, but with a broadband, differential DC to6GHz IF port. The LTC5552 is recommended for applicationswhere the IF frequency range extends below 500MHz.For applications where the IF frequency is always above500MHz, the LTC5553 is recommended, since it includesan integrated IF balun.

　　The mixer and integrated RF balun are optimized to coverthe 3GHz to 20GHz RF frequency range. The integrated LOamplifier is optimized for the 1GHz to 20GHz frequencyrange, requiring only 0dBm drive.The part delivers high IIP3 and P1dB, low LO leakage andhigh integration in a small package.

　　LTC5552主要特性:

　　Integrated LO Buffer: 0dBm LO Drive

　　50Ω Wideband Matched RF and LO Ports

　　Wide IF Bandwidth: DC to 6GHz

　　Upconversion or Downconversion

　　High IIP3:

　　+22.5dBm at 10GHz

　　+18.3dBm at 17GHz

　　+14.6dBm Input P1dB at 10GHz

　　8dB Conversion Loss at 10GHz

　　3.3V/132mA Supply

　　Fast Turn ON/OFF for TDD Operation

　　3mmx2mm, 12-Lead QFN Package

　　LTC5552应用:

　　5G Broadband Wireless Access

　　Microwave Transceivers

　　Wireless Backhaul

　　Point-to-Point Microwave

　　Phased-Array Antennas

　　C, X and Ku Band RADAR

　　Test Equipment

　　Satellite Modems

　　图1.LTC5552功能框图

　　图2.LTC5552标准测试电路图

　　图3.LTC5552典型应用框图

　　演示电路DC2668A

　　Demonstration circuit 2668A is optimized for evaluationof the LTCR5552 passive double-balanced mixer. Its RFport is broadband matched from 3GHz to 20GHz, and the internal LO amplifier, requiring only a 0dBm drive level,is broadband matched to 50Ω from 1GHz to 20GHz with10dB Return Loss. The differential IF output is usablefrom DC to 6GHz. The LTC5552 can be used for upconvertingand downconverting applications.

　　图4.演示电路DC2668A外形图

　　图5.DC2668A下变换混频双音测量建立图

　　图6.DC2668A上变换混频双音测量建立图

　　图7.演示板DC2668A电路图

　　演示板DC2668A材料清单:

　　详情请见:

dc2668afa.pdf

DC2668A.zip

5552f.pdf