This paper presents a designed 2.4 GHz bidirectional power amplifier which is suitable for the amorphous flat air-to-ground Ad hoc network system. Based on this PA, each Ad hoc network node’s communication distance can be extended. The proposed PA is designed to be a bidirectional transmission structure. More specifically, RFPA5542 and MAX4003 chips are selected for the TX part. SKY65971 chip is selected for the RX part. The structural layout of the overall impedance matching circuit is optimized to a three-stage cascade current series negative feedback mode. The overall design above has realized the expectation of amplifying and forwarding the signal from the signal source and receiving and amplifying the weak signal from the air-to-ground network nodes in real-time. Measurement results show that the design delivers that the output power is 30.1–30.6dBm, the gain is 25.4–25.9 dB, and the noise is 2.0–2.4 dB when the frequency range is 2.4–2.5 GHz. The experimental results show that the maximum point-to-point transmission distance of the amorphous flat ground wireless Ad hoc network reaches 9600 m, and the maximum point-to-point transmission distance of the amorphous flat air-to-ground wireless Ad hoc network reaches 14,800 m. This paper realizes the 14.8 km long-distance transmission of wireless self-assembling nodes (including airborne self-assembling nodes and ground-based self-assembling nodes) in the 2.4 GHz band, which lays a certain foundation for the subsequent low-altitude economic fly-by-network.

本文设计了一种适用于非晶扁平空地自组网系统的2.4GHz双向功率放大器。基于这个PA，可以扩展每个Ad hoc网络节点的通信距离。建议的 PA 被设计为双向传输结构。更具体地说，TX部分选择了RFPA5542和MAX4003芯片。RX部分选用SKY65971芯片。整体阻抗匹配电路的结构布局优化为三级级​​联电流串联负反馈方式。上述总体设计实现了对来自信号源的信号进行放大和转发以及对来自空地网络节点的微弱信号进行实时接收和放大的预期。测量结果表明，该设计提供的输出功率为 30。1-30.6dBm，增益为25.4-25.9dB，频率范围为2.4-2.5GHz时噪声为2.0-2.4dB。实验结果表明，非晶平地无线Ad hoc网络最大点对点传输距离达到9600 m，非晶平地空地无线Ad hoc网络最大点对点传输距离达到 14,800 m。本文实现了2.4GHz频段无线自组装节点（包括机载自组装节点和地基自组装节点）14.8km的长距离传输，为后续的低空经济发展奠定了一定的基础。飞网络。实验结果表明，非晶平地无线Ad hoc网络最大点对点传输距离达到9600 m，非晶平地空地无线Ad hoc网络最大点对点传输距离达到 14,800 m。本文实现了2.4GHz频段无线自组装节点（包括机载自组装节点和地基自组装节点）14.8km的长距离传输，为后续的低空经济发展奠定了一定的基础。飞网络。实验结果表明，非晶平地无线Ad hoc网络最大点对点传输距离达到9600 m，非晶平地空地无线Ad hoc网络最大点对点传输距离达到 14,800 m。本文实现了2.4GHz频段无线自组装节点（包括机载自组装节点和地基自组装节点）14.8km的长距离传输，为后续的低空经济发展奠定了一定的基础。飞越网络。