Total bandwidth of existing wireless communication technologies covers a wide frequency range of over one octave. But most existing power amplifier configurations cannot meet this requirement while at the same time maintaining a high efficiency. Therefore, a new structure that can achieve multioctave bandwidth is proposed in this paper together with the design methodology. The difficulty in realizing a bandwidth larger than one octave lies in the overlapping of fundamental and harmonic frequencies. Regarding this problem, the continuous class-F mode is extended to allow a resistive second harmonic impedance, rather than the pure reactive one. With the relaxed design requirements and overlapping design space of fundamental and second harmonic frequencies, harmonic tuning and fundamental frequency matching networks can be designed separately. More importantly, broadband matching for fundamental frequencies can be implemented simply by considering only three fundamental frequency points using the multiple frequencies matching method. To verify the validity of the proposed methodology, a multioctave power amplifier was designed, fabricated, and measured. Measured results verify a wide bandwidth of 128.5% from 0.5 to 2.3 GHz. Over this frequency range, drain efficiency was larger than 60% with output power greater than 39.2 dBm and large signal gain larger than 11.7 dB.

中文翻译：

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超宽带高效扩展连续F类功率放大器的设计

现有无线通信技术的总带宽覆盖了超过一个倍频程的宽频率范围。但是大多数现有的功率放大器配置无法在保持高效率的同时满足这一要求。因此，本文结合设计方法提出了一种可以实现多倍频程带宽的新结构。实现大于一个倍频程的带宽的难点在于基频和谐波频率的重叠。关于这个问题，连续 F 类模式被扩展为允许电阻性二次谐波阻抗，而不是纯无功阻抗。由于基频和二次谐波的设计要求宽松，设计空间重叠，谐波调谐和基频匹配网络可以分开设计。更重要的是，使用多频匹配方法，只需考虑三个基频点，就可以实现基频的宽带匹配。为了验证所提出方法的有效性，设计、制造和测量了多倍频程功率放大器。测量结果验证了从 0.5 到 2.3 GHz 的 128.5% 的宽带宽。在此频率范围内，漏极效率大于 60%，输出功率大于 39.2 dBm，大信号增益大于 11.7 dB。测量结果验证了从 0.5 到 2.3 GHz 的 128.5% 的宽带宽。在此频率范围内，漏极效率大于 60%，输出功率大于 39.2 dBm，大信号增益大于 11.7 dB。测量结果验证了从 0.5 到 2.3 GHz 的 128.5% 的宽带宽。在此频率范围内，漏极效率大于 60%，输出功率大于 39.2 dBm，大信号增益大于 11.7 dB。