基于IMA-93516的芯片简介及应用电路设计

字数:1445,页数:11

摘要
Agilent Technologies的IAM-93516 是一个高线性的GaAs FET 混频器使用 0.5um增强模式的 pHEMT技术。使用3x3 LPCC 封装。IAM-93516被设计成一个LO缓冲放大器和IF放大状态器为适当的解决减少板的空间和传输更好的IIP3，一个低缓冲器的增益和隔离度的驱动功率。LO端口有一个50Ω匹配电阻，能驱动差分器或者作为信号的结束端。级间的匹配在混频器和放大器级间引入，这样的设计用来获得想要的RF和LO频率信号。级间的匹配通过低通、高通或中间通带的陷波器获得。放大器的输出端口匹配200Ω电阻和一个完全差分器。在RF端口提供一个最适合的输入，减少信号丢失、噪声特性和IIP3特性。
IAM-93516是理想的适合无线电基站图表接受器、微波连接器、MMDS的下变频器和接受端的调制器、解调器，一般的用途FET混频器，需要有很到的线性度。所有的设计在RF为100％和DC情况下测试出来。
关键字：混频器       LO缓冲放大器   IF放大状态      下变频器
Abstract

Agilent Technologies’s IAM-93516 is a high linearity GaAs FET Mixer using 0.5um
enhancement mode pHEMT technology. This device houses in a 3x3 LPCC package. The
IAM-93516 has a built-in LO buffer amplifier and an IF amplification stage that serve
as an ideal solution for reducing board space and delivering excellent high IIP3,
gain and isolation with a low LO drive power. The device is designed with a differential configuration to provide good noise immunity. The LO port is 50 ohm matched and can be driven differential or single ended. An interstage match is introduced between the mixer and amplifier stage to allow device tuning at the desired RF and LO frequency. The interstage match can be a simple low pass, high pass or intermediate frequency trap. The amplifier output port is 200 ohm matched and fully differential. The simple matching at the RF port provides for optimum input return loss, noise figure and IIP3 performance.
The IAM-93516 is ideally suited for frequency down conversion for base station radio card receiver, microwave link receiver, MMDS, modulation and demodulation for receiver and general purpose resistive FET mixer, which require high linearity. All devices are 100% RF and DC tested.
Key word:  Mixer      LO buffer amplifier  IF amplification stage
             Frequency down conversion

    目 录
   
 1. IAM-93516芯片简介.................................................................4
2. IAM-9351芯片封装与引脚功能.........................................................4
3. IAM-93516内部结构与工作原理  ......................................................6
4. IAM-93516电气特性..................................................................6
5. IAM-93516应用电路设计..............................................................7

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