Research And Design Of Microwave Power Amplifier Applied To Phased Array Antenna

At present, the phased array technology is widely used in aerospace, electronic countermeasure, radar and other fields. Its excellent performance has been recognized. The power amplifier has a direct impact on the performance of the whole phased array antenna system, and it is the core component of radio frequency channel in phased array antenna. In addition, the microwave power amplifier is very important in modern wireless communication system, and it plays an important role in the fields of satellite communication, radio and television, microwave remote sensing. With the rapid development of wireless communication technology, the higher requirement is proposed to the power amplifier. High power, high gain, high efficiency wide bandwidth and small volume are still hot spots of research. Therefore, it is very important to research and design the microwave power amplifier.The goal of this thesis is to design an X band power amplifier applied to phased array antenna. The specific design indexes are that the output power is greater than 30 d Bm and the efficiency is greater than 20% at 1d B power compression point. In addition, the bandwidth is greater than 500 MHz. The design of the amplifier is divided into four parts, and it includes theory analysis, circuit design, simulation and debugging. Specifically, it includes schema design, device selection, material selection, matching circuit design, bias circuit design, layout design, metal cavity design, scattering parameters simulation, resonant frequency simulation, circuit debugging and design improvement.Two types of power amplifiers are studied and designed in this thesis. Through the comparison of test results, HMC7357LP5 GE power tube is chosen in the design the power module of 16 radio frequency channels in the phased array antenna. The final test results show that the output power is 30.07 d Bm and the efficiency is 25.5% at 1d B power compression point. In addition, the small signal gain is 30.2d B and the bandwidth is 0.9GHz. Test results meet the design requirements and it shows that the design is feasible.