A Broadband Power Amplifier Working in Discontinuous Bands
A power amplifier, discontinuous technology, applied in power amplifiers, radio frequency amplifiers, amplifiers with semiconductor devices/discharge tubes, etc., can solve problems such as limited available communication bandwidth, achieve good prospects for promotion and application, reduce interference, and expand availability The effect of bandwidth
Active Publication Date: 2021-03-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
The shortcomings of traditional dual-band / multi-band power amplifiers are reflected in the limited available communication bandwidth, while power amplifiers that support continuous broadband operation still have considerable power amplification capabilities at non-design frequency points, which will bring system-level problems in many ways. question
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[0028]In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0029] Compared with the multi-frequency scheme and the continuous broadband scheme, the main feature of the present invention is that the amplification of wideband signals can be realized in frequency bands that are far apart, and the signal amplification capability is weaker in non-design frequency bands, see schematic figure 1 .
[0030] In this embodiment, the power amplifier die uses a GaN HEMT device (high electron mobility transistor based on galli...
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The invention discloses a broadband power amplifier supporting work in a discontinuous frequency band. The power amplifier is characterized in that a matching circuit based on a band-pass structure is used. In a target designed frequency band, the structure achieves discontinuous frequency band broadband matching of the power amplifier with the optimal complex impedance, and on a non-designed frequency point, available gains on the non-designed frequency band are compressed, a power output capacity is weakened and power conversion efficiency is reduced via targeted impedance mismatching. The circuit is composed of five transmission lines: two quarter-wave transmission lines on a transmission path and three half-wave branch transmission lines; an impedance value of each transmission line can be acquired according to a design formula provided by the invention. The power amplifier provided by the invention is the broadband power amplifier supporting independent work in discontinuous frequency band and time-shaped multi-mode work, is extremely suitable for an application scene where a current communication system needs to be compatible with a plurality of communication protocols at the same time, and can meet requirements on communication bandwidth and multiband work.
Description
technical field [0001] The invention relates to a broadband power amplifier working in a discontinuous frequency band, which belongs to the design field of power amplifiers in mobile communication systems. Background technique [0002] As the most critical unit in the wireless communication system, the power amplifier's performance determines the performance index of the transceiver system at the system level. In the current wireless communication system, multiple communication protocols coexist, resulting in the system needing to support multiple working frequency bands at the same time. In addition, in order to increase the data transmission rate, the current wireless communication system, on the one hand, adopts more complex modulation and coding methods to improve the efficiency of spectrum utilization; , to meet the signal bandwidth requirements of high-speed data transmission. [0003] The applicant searched the relevant technical literature at home and abroad and fo...
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IPC IPC(8): H03F1/48H03F1/56H03F3/193H03F3/21G06F30/39
CPCG06F30/39G06F2111/06H03F1/483H03F1/56H03F3/193H03F3/211H03F2200/451
Inventor 于翠屏孟祥宇刘元安黎淑兰苏明王卫民吴永乐
Owner BEIJING UNIV OF POSTS & TELECOMM