volume | PIER Journals

Abstract

The rapid evolution of wireless communication networks is driving the rapid development of communication systems toward greater integration, wider bandwidth, and higher efficiency. To satisfy the design requirements of broadband, high-efficiency power amplifiers, this study proposes an implementation scheme that integrates filtering, matching, and harmonic-control technologies. In this innovative method, high-order matching networks are converted into low-order passive networks that integrate the parasitic output capacitance and package inductance of transistors, thereby achieving a more compact area. In addition, a dual-stub microstrip line cascaded topology is introduced to suppress the second harmonic. The test results demonstrate that the power amplifier achieves a gain of more than 16.5 dB in the 100-900 MHz frequency band, maintains a drain efficiency of over 55%, with a peak drain efficiency of up to 75% under saturated operation, delivers a saturated output power of 40.5-42 dBm, achieves a second harmonic suppression of up to 61 dBc, and has a relative bandwidth of 160%. This design realizes high-efficiency power transmission performance and demonstrates excellent potential for engineering applications in communication systems.

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Dr. Wenjin Liu

Dr. Jiawei Wang

Professor Jingchang Nan

Mr. Tianyi Li

Dr. Bo Li

Dr. Jesur Turxun