A CMOS power amplifier with reconfigurable power cells and matching network for 2.4 GHz wireless communications

Modesto, A.A.; Santos, Fávero Guilherme; Pereira, Jonathas H. M.; Leite, Bernardo; Mariano, André

doi:10.1016/j.aeue.2019.152919

Cited by 10 publications

(1 citation statement)

References 13 publications

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“…Since the input/output impedances of the millimeter-wave amplifiers are capacitive, the input/output matching circuits should be inductive in a wide frequency range. Therefore, to improve the performance of input/output impedance matching networks for various circuits such as wideband millimeter-wave power amplifier, 1 high gain amplifier, 2 low noise amplifiers, [3][4][5] low power amplifiers, [6][7][8] high-efficiency broadband power amplifiers, [9][10][11] and V-band mixer, 12 the ultra-wideband inductors are required. Also, the proposed ultra-wideband inductor could be used in the design of a microstrip wideband bandstop filter, 13 tri-bandstop filter, 14 dual-mode tunable bandpass filter, 15 and ultra-wideband bandpass microstrip line filters.…”

Section: Introductionmentioning

confidence: 99%

Planar circuit analysis of ultra‐wideband millimeter‐wave inductor using transmission line sections

Ashrafian

Mohammad-Taheri

Naser-Moghaddasi

et al. 2021

Circuit Theory & Apps

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Regarding the capacitive nature of input/output impedances of millimeterwave amplifiers, it is necessary to utilize wideband inductive elements for the design of input/output impedance matching circuits. In this paper, the design and optimization of an ultra-wideband transmission line inductor with an inductance of less than 100 pH are introduced for using at frequencies above 50 GHz. The reason of using this inductor is its superior performance compared to that of a spiral inductor and single-coil inductor. The inductor consists of three rectangular microstrip line segments with nonequal and variable characteristic impedances. The design is done by calculating the impedance matrix using planar circuit analysis (PCA) based on a planar waveguide model, segmentation/desegmentation methods, and an intelligent algorithm in MATLAB. With this design method, the effect of discontinuities, fringing fields at the edges of the microstrip, and the conductor as well as dielectric losses can be considered while minimizing the dispersion effect. In this study, to reduce the calculation time of the impedance matrix, the doubly infinite series are reduced to a singly infinite series by summing the inner sum for a rectangular segment whose one side is shorted and three other sides are open.

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