P-band Electrically Tunable Filter Design And Realization

Electronically controlled Filter is a new electronic device in recent research and development, the United States started to develop it after the Gulf War. And it has been used extensively for military communications. As used of the device, the sensitivity of the components and anti-jamming capabilities are greatly improved. Our country has also started to allocate huge sums of money in these kinds of researches. At present, the communications area has a huge demand for this electronically controlled filter. It is widely used in anti-hopping communications tracking system. The main function of electronically controlled filter is to constantly sending and changing the frequency transmitter when it received the orders, to prevent third parties from eavesdropping and jamming.The issue stems from a unit of the pre-research project .This product is mainly used in the remote control receiver which is used in the unmanned aerial vehicle. Nowadays the electronically controlled filter's control part is completed by DSP. But compared to this topic selection of high-speed single-byte MCU, the high development costs, the long development cycle, the whole complex control panel is the main shortcomings of DSP. The main innovation in this project is to use a single-byte MCU to control this filter. The main point is to optimize the innovation process and the control software and hardware structure. On the hardware choice, selecting a lot faster response chip, greatly increasing the speed of the response of the product, and to fully meet the requirements of the small of the product. In software design, selecting of the United States POLE ZERO companies filter frequency control code formula. This makes a good filter to control codes and the frequency of the almost linear relationship.