A Concurrent Dual-Band High-efficiency Integrated Filtering Power Amplifier Coordinated with an Adjustable Transmission Zero.
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| Title: | A Concurrent Dual-Band High-efficiency Integrated Filtering Power Amplifier Coordinated with an Adjustable Transmission Zero. |
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| Authors: | Tang, Qihu1, Nan, Jingchang1 nanjingchang@Intu.edu.cn, Liu, Taijun2, Meng, Hao1, Pan, Junru1 |
| Source: | Progress in Electromagnetics Research C. 2026, Vol. 170, p210-219. 10p. |
| Subjects: | Transmission zeros, Power amplifiers, Signal filtering, Impedance matching, Harmonic suppression filters, Radio engineering, Interference suppression |
| Abstract: | This paper presents a design methodology for a concurrent dual-band integrated filtering high-efficiency power amplifier (PA) through the coordinated use of a dual-band harmonic control network (DB-HCN) realized with an adjustable-transmission-zero dualband filtering matching network (ATZ-DB-FMN). To improve the efficiency under dual-band operation, the proposed DB-HCN enables simultaneous impedance control up to the third harmonic at both operating frequencies. To realize a compact integrated structure, the proposed ATZ-DB-FMN provides dual-band impedance matching and introduces transmission zeros (TZs) on both sides of the passbands and in the inter-band region. In particular, the inter-band TZ is adjustable and can be used to suppress interference at a desired frequency between the two passbands. To validate the proposed method, a prototype operating at 2.4 and 3.6 GHz was designed and fabricated, with the adjustable TZ set at 3.1 GHz. The measured results show drain efficiencies of 78.6% and 75.3% and output powers of 40.05 dBm and 40.2 dBm at 2.4 and 3.6 GHz, respectively. The effective tuning range of the TZ is 2.6-3.4 GHz, and the measured power gain at 3.1 GHz is -26.5 dB, confirming effective inter-band suppression. These results demonstrate that the proposed design method can simultaneously achieve dual-band high efficiency, integrated filtering, and adjustable inter-band suppression. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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