Design And Realization On The Radio Frequency Chain Of Broadband Transceiver

As an important component of the RF test instruments, RF front-end module has to achieve large dynamic range, high accuracy, high linearity and other indexes in a very wide frequency range. Therefore, it is highly required that the precisely design of the circuits, PCB layout and EMC. On the other hand, the overall performance and cost of the RF test instruments are almost decided by the RF front-end module. In fact, most of instrument manufacturers do not sale the module which is considered as the company's core technology.The author has participated in the project that the R&D of the High-performance RF Front-end in the Broadband Wireless Access Platform, which is supported by the Electronic and Information Development Fund of the Ministry of Industry and Information Technology, and been in charge of the RF chain module R&D. The module mainly performs the following functions:sending appropriate RF signal to antenna port, receiving RF signal from the antenna port.After referring a large number of literatures about RF chain design, the author has accomplished requirement analysis, scheme design, chips selection and link simulation. Both the PCB board and the shield box are completed with the help of all kinds of circuits design technologies. The result of test for the RF module indicates that the design has achieved the expected target. For instance, the transmitter link is able to send RF signal power from-110dBm to OdBm with 0.3dB relative accuracy in the 400MHz～2.8GHz frequency band. The receiver link can receive RF signal power from-85dB to+35dBm.The contents of this thesis are described as follows: 1, Introduce the origin of the task and the meaning of the research. Describe the author's work and the thesis's structure.2, Simply introduce the common structure and key index of the transceiver. Present the whole design scheme of the broadband transceiver.3, Accomplish the design and realization of the RF chain module including link budget, circuit simulating and PCB layout, shield box design and debugging etc. Some results of test have been presented and verified the whole design's validity.4, Summarize the works of this thesis and make an expectation.