A Broadband Active Balun with Inductor-Less Active Peaking and Imbalance Correction

Kawahara, Keisuke; Umeda, Yohtaro; Takano, Kyoya

doi:10.1109/mwscas47672.2021.9531759

Cited by 5 publications

(1 citation statement)

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“…Miniaturization of the balun is a big challenge since the working frequency is only 128 MHz, which falls in the very high frequency (VHF) band. Active baluns using nonlinear components provide smaller size but poor linearity [8]. Integrated passive device (IPD) technology can achieve compact size but poor capability of handling high power signals [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Compact LTCC Balun using L-C Embraced Structure for 128 MHz 3T MRI Applications

Ma¹,

Tie²,

B.³

2022

RADIOENGINEERING

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A compact lumped-element balun is proposed for 128 MHz frequency 3 Tesla (T) magnetic resonance imaging (MRI) applications. The proposed L-C embraced structure places vertically-interdigital-capacitor (VIC) inside spiral inductor, thus three L-C elements only take up one inductor's area. Therefore, significant size reduction and integration increment are both achieved without increasing the number of substrate layers. The balun is built on a 10-layer thickness low temperature co-fired ceramic (LTCC) substrate and has the smallest reported size of only 0.007 × 0.008 × 0.0009 λ g . Moreover, the proposed balun also has a 2 nd -order harmonic suppression of 32 dB. Furthermore, comparisons and discussions are also implemented.

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Section: Introductionmentioning

confidence: 99%