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- Title
MINIATURIZED DUAL-BANDMATCHING TECHNIQUE BASED ON COUPLED-LINE TRANSFORMER FOR DUAL-BAND POWER AMPLIFIERS DESIGN.
- Authors
Li, S.; Tang, B. H.; Liu, Y. A.; Li, L. S.; Yu, C. P.; Wu, Y. L.
- Abstract
This study presents a novel miniaturized dual-band coupled-line impedance transformer. This dual-band matching technique uses the characteristics of coupled-line and dual-band stubs to realize matching arbitrary complex impedance to arbitrary complex impedance at two arbitrary uncorrelated frequencies. Especially, it satisfies the demand of dual-band matching at two relatively closed operating frequencies (n = f2/f1 ≤ 1:2), and occupy a very small circuit area with inherent DC-Block function. The proposed synthesis approach is validated by the design and fabrication of a 30W gallium nitride (GaN)-based class-AB power amplifier (PA) for GSM and WCDMA at 1800MHz and 2140MHz. The PA's output matching network based on the proposed structure can accurately match 50 Ω to the ideal load impedances of the transistor at two designed frequency simultaneously and has 20% and 15% bandwidth for which the reflection coefficient magnitudes are less than 0.1, respectively.
- Subjects
ELECTRIC transformers; POWER amplifiers; ELECTRIC impedance; CODE division multiple access; GALLIUM nitride
- Publication
Progress in Electromagnetics Research, 2012, Vol 131, p195
- ISSN
1070-4698
- Publication type
Article