Miniaturized Low-Loss Impedance Transformers Using Bi-Characteristic Impedance Transmission Lines (BCITLs)

Kittiwittayapong, Sangwon; Satitchantrakul, Thanatcha; Torrungrueng, Danai; Phaebua, Kittisak; Lertwiriyaprapa, Titipong; Naruemit, Naruemit

doi:10.1109/ieecon51072.2021.9440240

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2024

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“…In [9], the approach involves the application of multi-section transmission lines for implementing QWLTs in PDs, leading to a significant 25% size reduction compared to that of the traditional PD configuration. An alternative method for size reduction involves the implementation of a compact microstrip resonant cell (CMRC) [11], yielding a total size reduction of 40% in comparison to that of the conventional TL structure [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Miniaturization of Power Dividers by Using Asymmetric CMRC Structures and QWLTs with Low-Cost Materials

Kittiwittayapong,

Torrungrueng,

Phaebua

et al. 2024

RADIOENGINEERING

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This paper presents the miniaturization of power dividers using asymmetric compact-microstrip-resonantcell (CMRC) structures employing low-cost materials based on a quarter-wave-like transformer (QWLT). The proposed CMRC-based QWLT power divider is intended for operation at a frequency of 2.4 GHz, utilizing the FR-4 print circuit board (PCB) with a dielectric constant of 4.3 and a substrate thickness of 1.6 mm. The CMRC dimensions include a width of 5.32 mm and a length of 8.52 mm. It is found that a significant 50% size reduction of length is achieved compared to a conventional power divider, while maintaining an insertion loss (IL) of 3.3 dB, as well as achieving the return loss and isolation loss of 20 dB.

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