Abstract
The fourth-generation (4G) wireless communication has been deployed in many countries. However, there are still some problems such as spectrum crisis due to the increase of wireless mobile devices and servicing. Therefore, the fifth-generation (5G) communication system will be employed at some different spectrum other than 4G frequency band. The radio frequency power amplifier (RFPA) is the key component of the 5G system. In this paper, a broadband continuous class-F (CCF) RFPA is designed for the 5G frequency band from 3.3-4.3 GHz. The input and output matching network are designed using the simplified real frequency technique (SRFT). Using a 10W GaN CGH40010F Cree device, the efficiency of the RFPA achieved greater than 70.7% for the whole frequency band with a maximum of 81.5%. The output power and the gain are more than 40 dBm and 10 dB respectively
Highlights
With the evolution of wireless technology, the use of wireless devices increasing day by day in different fields
In the low-frequency band, the communication network of different countries will operate at different operating frequencies
THEORY OF continuous class-F (CCF) MODE The conventional class-F mode radio frequency power amplifier (RFPA) is derived from the class-B amplifier by properly terminating the harmonics impedance
Summary
With the evolution of wireless technology, the use of wireless devices increasing day by day in different fields. Two widely used switching RFPA are class-E and class-F These two RFPA are used because it can achieve high efficiency. At the high frequency, the efficiency of the class-E amplifier decreases because of the limitation of charging capacity [7]. To alleviate the narrow band problem, waveform engineering-based continuous class-F (CCF) RFPA technique has been applied. There is a problem of anticlockwise rotation of fundamental and harmonics impedance at the current generator plane [9] when using this technique. A broadband CCF RFPA is designed for the frequency range of 3.3 to 4.3 GHz. The simplified real frequency technique (SRFT) has been used for the designing of input and output matching networks.
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