| As people’s demand for wireless communication technology continues to increase,wireless transceiver systems are also facing higher requirements.The function of the power amplifier is to amplify the small modulated signal to enough power to be radiated by the antenna.The resonator is an important frequency selection device and the basic structure of a filter.It plays an important role in extracting useful signals and suppressing noise and clutter.Both power amplifiers and filters are an indispensable part of a wireless system,and their performance directly affects the entire system.Therefore,improving their performance is of significance to improve the performance of the entire system.Recent years,people’s demand for high-quality communications and the rapidly increasing types of services have led to the complexity of signal modulation methods,and it will cause the signal peak-to-average ratio to be too high,which directly leads to a decrease in the efficiency of the power amplifier.The resonator is a part of the filter which is also a fundamental frequency selection component in the communication system.Its volume and frequency response characteristics will affect the performance of the entire system.Therefore,how to raise the energy efficiency of power amplifier,achieve high output power,high gain,high efficiency,and realize the miniaturized design of the resonator has become a hot issue.In addition,the current level of chip design and manufacturing in China still lags behind that of foreign countries,and many chips still rely on imports.View of these aspects,it is important to increase the design and research of power amplifiers and resonator chips in wireless transceiver systems.The specific research contents of this topic are as following:(1)Based on parallel transistor technology and adaptive bias technology to analyze the design of the power cell.The output stage power unit uses 12 transistors in parallel to provide the output power of the power amplifier,and the driver stage uses 4transistors in parallel.Fully consider the characteristics of the Ga As HBT device itself,and use the improved Wilson current mirror to design the adaptive linearization bias circuit to complete the simulation design optimization of the power amplifier output stage power cell and the driver stage power cell.(2)On this basis.Two power amplifiers are designed for the two important frequency bands at 2.4GHz and 5.8GHz in wireless communication.Combined with the design indicators,a two-stage cascade method is adopted.At the closing 1d B compression point at 2.4GHz frequencies,an output power of 27.228d Bm,a gain of35.788d B,an efficiency of 37.488%is achieved,and the fifth harmonic suppression is less than-30d Bc.In the 5.8GHz frequency,at the 1d B compression point,an output power of 29.063d Bm,a gain of 25.323d B,an efficiency of 40.572%is achieved,and the fifth harmonic suppression is less than-30d Bc.Finally,the performance of the power amplifier in the two frequency bands is compared and analyzed.(3)The on-chip resonator design using broadside coupled distributed capacitors effectively reduces the area of the resonator.At the same time,a lumped parameter model is ready for analysis.By modifying the physical size of the allocated capacitors,resonance can be generated at specified frequency.The resonator is drawn up and tested based on the 0.13-μm(Bi)-CMOS process,and finally resonance occurs at 47GHz,and the chip size is only 0.176×0.149mm~2.The 2.4GHz and 5.8GHz power amplifiers proposed in this topic all meet the working requirements.By visiting the literature,the index of this power amplifier basically reaches the power amplifier index of this frequency band at home and abroad,which has a certain engineering reference value for the future research and design of power amplifiers.The design of on-chip resonators utilizing broadside coupling distributed capacitors proposed in this topic also meet the working requirements and can be applicable to the design of millimeter wave band filters in the future. |
