Research And Design On Rffrront End Of Ku Band Transceiver

With the increasing development of electronic technology, wireless communication technology has made enormous technological progress, it has been widely used in radar system, detection system and mobile communication system. As the vigorous development of the wireless communication market, the spectrum resource consumption and electromagnetic interference are the main problems that needed to be solved urgently. The complex electromagnetic environment of this new era drive the transceiver develops towards high-performance, low-power and miniaturization.This thesis focuses on the design of the Ku band transceiver, as the front component part of wireless communication system, the design of transceiver has great impact on the performance of the whole system. First, the common structures and technical indicators of receiver and transmitter are simply introduced and analyzed. Then, according to the demand of the time-difference localization project and technical application practice, we proposed the scheme of Ku band transceiver and the system performance index.The second part of this thesis introduces the design details of the transceiver. This transceiver contains four communication units communicating with corresponding sub-stations. Each unit contains two reception channels and one transmitter. Four groups of partial control channels integrated in a square cavity which length is 18 cm, other channels integrated in a 19cm×22cm rectangle cavity. This main work is to obtain scheme design trough system index decomposition, select basic devices based on scheme deign, then the printed circuit board was designed. In the end we accomplish to assembly and debug of this transceiver system, some test results were provided and analyzed. The most important work is the distribution of channels in the rectangle cavity. At last, these three channels achieve good isolation by using a duplexer and a circulator, the target reception channel has a 84 dB gain from 15.15 GHz to 16.10 GHz, the location reception channel has a 85 dB gain from 16.295 GHz to 16.365 GHz, the control transmitter’s output power is 2W in 5MHz around 16.74 GHz. Furthermore, a broadband bandpass filter with the center frequency of 13 GHz that used in this time-difference localization project was designed.