| dc.description.abstract | The advent of the fifth-generation mobile communication network will provide greater data volume and higher. The transmission rate, shorter latency, and support for more communication device connections. In order to achieve the vision of the next-generation mobile communication system, whether in the physical layer, media access control layer, network layer, or application layer all require more advanced technology.
In this paper, we will design power amplifiers in the sub-6 GHz, respectively, using the WIN 0.25-µm GaN HEMT process to achieve. In the second chapter of this paper, we use the WIN 0.25-µm GaN HEMT process to design a 3.5-GHz power combine amplifier for 5G small-cell base stations, with an operating frequency range of 3.3 GHz to 3.8 GHz. This circuit is composed of two single-stage power amplifiers. The power divider and power combiner of the impedance Wilkinson transforming structure are used for power combining. The power divider and power combiner of impedance transforming Wilkinson are maded with on chip, and the chip area is 1×2 mm2. The simulation results of power combine amplifier show that the small signal is within the operating frequency range of 3.3--3.8 GHz, the gain and input return loss are greater than 11.9 dB and 10.6 dB, and the output return loss are greater than 7.6 dB respectively, and the large signal is at 3.5 GHz, OP1dB and OP1dB The following PAE are 38.2 dBm (6.6 W) and 53 %, OP1dB the following DE is 56.3 %
In the third chapter of this paper, we will perform power combine amplifier measurements and circuit detection and re-simulation. The measurement results show that the small signal of the single power amplifier is within the operating frequency range of 3.3--3.8 GHz, the gain and input return loss are respectively greater than 10.6 dB and 12.4 dB, and the large signal at 3.5 GHz, the PAE under OP1dB and OP1dB are 35.1 dBm (3.2 W) and 33.1 %, OP1dB the following DE is 35.5 % .The measurement results are in line with the power amplifier performance target of the active phased array at the transmitting end of the 5G small-cell base stations. | en_US |