高功率微波放大器测试

微波电路的非线性特性往往不利于完整的传输该电路的信号，例如在微波功率放大器内部产生畸变。因而选编了这篇《高功率微波放大器测试》。
RS Microwave specializes in the design and manufacturing of high quality RF and Microwave filters for commercial and military applications. Many of our products are designed for high power and require extensive testing and certification. We are staying true to the motto of our company "We Duplicate What We Simulate”™, if we build for high power – we test for high power. RS Microwave is one of the few filter companies that not only actively invests in research and development, but also builds its own testing equipment. Using advanced design techniques and advanced simulation programs like Ansoft Designer and HFSS, we have built high power amplifiers for JTIDS/MIDS program band, UHF band, and currently in the final building stages of the amplifier for TTNT program.

RS Microwave擅长于设计和制造高品质的RF和微波滤波器用于商业和军事方面的用途。我们的许多产品是专为高功率和项目需要进行广泛的测试和认证，我们的座右铭是： “我们重复我们模拟“ ™ ，我们建立高功率-我们的测试为了高功率。卢比微波是少数滤波器公司积极投资于研究和发展的。并为此建立了自己的测试设备，采用先进设计技术和先进的模拟程序一样， Ansoft的设计师以及HFSS ，我们已建立了高功率放大器JTIDS系统/ UHF段。目前在最后的建设阶段是放大器TTNT计划。

Figure 1: RS Microwave technician con-ducting a high power test for JTIDS/MIDS

如图2所示是一个典型的UHF高功率放大器框图。

Figure 2: UHF HPA Block Diagram

That particular amplifier was designed for UHF frequency band providing over 2.5kW of peak power with theoretical capability of 1.8kW average power (limited due to existing DC power supply).
独特的放大器设计在UHF频段，提供超过2.5KW的峰值功率与理论功率，1.8KW的平均输出功率（有限的，由于现有的直流电源供应） 。
The overall efficiency of over 50% was achieved. Amplifiers for JTIDS/MIDS programs provide over 2kW peak power. The upcoming amplifier for the TTNT program will have over 500W peak and 120W average power output, in the bands 1350-1550 and 1700-1900 MHz.

All high power amplifiers our company builds have temperature control and shutdown capability, as well as test points for quick and reliable troubleshooting. We use diverse design techniques in order to achieve high efficiency and high reliability amplifiers. Various techniques have been used in the design of power division/combining such as Wilkinson, Gysel, Quadrature and Reactive networks. In the UHF HPA, we have used 3 kinds of power combining techniques utilizing the advantages of each one. In Figure 3 is shown a typical Distribution driver Amplifier Unit, utilizing FET transistors and Gysel power divider/combiners.

Figure 3: Distribution Amplifier Unit
Power Amplifier Modules were designed using Push-Pull BJT power amplifiers that were combined using 3dB Quadrature couplers. Quadrature couplers are an excellent way for power distribution due to a high isolation and high power capability. In Figure 4, a typical power module is shown. For the output a Reactive power combiner was used due to a very high power handling capability, low insertion loss, and capability to expand in the future if the need will rise for a higher power output.
功率放大器模组设计，使用负载牵引特性原理功率放大器被合并使用三分贝正交耦合器。正交耦合器是一个很好的方式，具有配电，高分离和高功率的能力。图4中，一个典型的功率模块显示。为输出无功功率合成器使用，由于非常高的功率处理能力，低插入损耗，并有能力扩大，在未来如果有需要的话将上升为较高的输出功率。

Figure 4: Power Amplifier Module
微波高功率测试决定了我国远程雷达，气象雷达，GPS北斗系统，卫星地面站，空间航天器的发展和水平。在国家安全系统具有举足轻重的意义。

看着很牛，中国的微波测试设备的研制和生产还有很长的一段路要走！

小编你真是全才

lihai