Investigations On Multi-Mode Broadband RF Transceiver Module

With the rapid development of communication technology, Broadcasting Network, Telecommunication Network and Internet are going to be an integral, which is called Network Convergence. As an important part of some communication systems, the RF transceiver module should have a wide operating frequency band when designed for Network Convergence and the research and design of broadband RF transceiver module is particularly important.A multi-mode broadband RF transceiver module is presented in this paper, which is developed for Network Convergence. The module covers from 0.5GHz to 2.4GHz, supporting a maximum channel bandwidth of 20MHz. At first, several classic transceiver architectures were analyzed and the Zero-IF architecture is chosen. Secondly, combined with specific requirements, the indexes of a quadrature modulator, a quadrature demodulator, a power amplifier, a low-noise amplifier or some other component are obtained. Thirdly, with the help of simulation software, EVM, ACPR of transmitter and NF, link budget, EVM of receiver are analyzed to prove that the design is reasonable.The measured results are illustrated as followed:the transmitter generates maximum output power of 15dBm with its ACPR lower than -43dBc.The EVM of 20Msps QPSK, QAM16 and QAM64 is below 2.7%,2.4% and 2.3%, respectively. The receiver has receiver sensitivity less tha n-80dBm and NF less than 3.5dB. Its EVM of 20Msps QPSK, QAM16 and QAM64 is below 3.1%,2.3% and 2.1%, respectively. All the measured results indicate the performance of the multi-mode broadband RF transceiver module is superior to the requirements. At last, some deficiencies of the module are analyzed and the improvements are proposed.