下载后可任意编辑论文题目: 射频程控步进衰减器设计与实现专业: 电子信息工程学生: 孙一文签名: 指导老师: 马延军签名: 摘要在现代无线通信系统中, 射频电路的性能指标在整个通信系统起着重要的作用, 而射频电路在电子对抗、 导航、 卫星通讯、 雷达、 无线通信等系统中也应用十分的广泛, 成为了现代无线通信的关键部件之一。在此背景下, 我们讨论设计出了一个在10MHZ-50MHZ, 增益控制范围为-40dB 到 0dB 的由单片机进行增益的射频程控衰减器。讨论中, 我们实行的是继电器来作为选择控制, 同时用了 Proteus 进行相关性能仿真, 设计了增益不同的衰减电路以及三极管电路, 最后得到了射频程控步进衰减器的相关性能指标。而针对射频电路 PCB 制板时的电路原理图和布线, 考虑到制板时所需考虑的各种情况, 改进了放大器的制板电路, 从而提高了电路板的的性能。最后, 在对射频衰减电路进行了测试和优化后, 最终测试结果表明该射频程控衰减器的各项指标符合预期要求。【关键词】射频程控步 硬件电路 衰减器【论文类型】设计下载后可任意编辑Title:Radio frequency program design and implementation step attenuatorMajor: Electronic information engineeringName:Sun YiwenSignature: Supervisor:Ma YanjunSignature:_ ABSTRACTIn modern wireless communication system, radio frequency circuit Performance indicators affecting the quality of the whole communication system and its in satellite communication, radar, wireless communications, navigation, elect ronic countermeasures system also has a wide range of applications, such as is one of the key components in modern wireless communication. In this background, we research devised one in 10 MHZ - 50 MHZ and gain control range for - 40 db to 0 db gain by single-chip rf programmable attenuator. Study, we take the relay to choose as a control, at the same time using the performance simulation of Proteus, respectively for attenuation circuit and transistor circuit design, finally obtained the performance of the attenuator On board at the time of the circ...
