Design of an Ultra-Wideband LDMOS Power Amplifier Based on a Two-Stage Harmonic Suppression Network.
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| Title: | Design of an Ultra-Wideband LDMOS Power Amplifier Based on a Two-Stage Harmonic Suppression Network. |
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| Authors: | Li, Tianyi1 137819Lty@gmail.com, Nan, Jingchang1, Wang, Jiawei2, Turxun, Jesur2 |
| Source: | Progress in Electromagnetics Research C. 2026, Vol. 167, p61-68. 8p. |
| Subjects: | Power amplifiers, Impedance matching, Ultra-wideband devices, Parallel resonant circuits, Butterworth filters (Signal processing), Microstrip transmission lines, Feedback control systems |
| Abstract: | This study proposes an improved output matching design technique based on a two-stage harmonic suppression network, with the core innovation being a hybrid matching mode combining microstrip lines and lumped-parameter components in output matching. In the first-stage harmonic suppression network, a third-order Butterworth filter served as the prototype. Utilizing the Richards transformation and Kuroda rule, it is converted to a cross-shaped microstrip line, achieving high-frequency matching while suppressing second-harmonic components. The second-stage harmonic suppression network employs two series-connected LC resonant circuits to suppress the third- and fifth-harmonics. To broaden the bandwidth and enhance the circuit stability, an improved negative feedback structure based on a second-order Butterworth low-pass filter prototype was introduced. Practical circuit testing within the 0.4-1.2 GHz operating bandwidth demonstrated an output power ranging from 40.1 to 41.3 dBm and drain efficiency exceeding 51.63%, robustly validating the effectiveness of this approach. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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