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

Ma, Qinbin; Tie, H.; B., Zhou,

doi:10.13164/re.2022.0455

Cited by 2 publications

(1 citation statement)

References 15 publications

(21 reference statements)

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“…However, Capacitance lower than 20 pF and inductance lower than 40 nH are impractical to make smaller parts at the VHF-band [1]. Recently, three-dimension (3D) system-in-package technology of low temperature co-fired ceramic (LTCC) uses capacitance increased vertically-interdigital-capacitors (VICs) [2,3] for circuit miniaturization with high Q-factors [4][5][6][7][8][9]. GaAs, SiGe, and CMOS have also been used to build compact passive components with lumped elements [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

LTCC-packaged Branch-line Coupler Using Capacitance Improved Capacitor for VHF-band Applications

Yu,

Zhou,

Shi

et al. 2024

PIER Letters

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A compact branch-line coupler is proposed with capacitance improved capacitor (CIC) using low-temperature co-fired ceramic (LTCC) packaged technology. The proposed CIC is constructed for higher capacitance without any size increment by further separated horizontal finger pads on VIC. The area of the coupler is only 10.3 × 9.4 × 1 mm 3 , which is equivalent to 0.0041 × 0.0035 × 0.0004λg 3 . The application frequency band covers maritime and aircraft navigation in the very high frequency (VHF)-band. The measured in-band S11, S21, S31, and S41 are better than −15, −4.1, −2.2, and −18 dB from 47 to 67 MHz, respectively. And the measured phase difference between the coupled and through ports is within 90 ± 0.2 • , which presents an excellent linear characteristic.

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Section: Introductionmentioning

confidence: 99%

LTCC-packaged Branch-line Coupler Using Capacitance Improved Capacitor for VHF-band Applications

Yu,

Zhou,

Shi

et al. 2024

PIER Letters

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Lumped-Element Circuit Modeling for Composite Scaffold with Nano-Hydroxyapatite and Wangi Rice Starch

et al. 2023

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Mechanistic studies of the interaction of electromagnetic (EM) fields with biomaterials has motivated a growing need for accurate models to describe the EM behavior of biomaterials exposed to these fields. In this paper, biodegradable bone scaffolds were fabricated using Wangi rice starch and nano-hydroxyapatite (nHA). The effects of porosity and composition on the fabricated scaffold were discussed via electrical impedance spectroscopy analysis. The fabricated scaffold was subjected to an electromagnetic field within the X-band and Ku-band (microwave spectrum) during impedance/dielectric measurement. The impedance spectra were analyzed with lumped-element models. The impedance spectra of the scaffold can be embodied in equivalent circuit models composed of passive components of the circuit, i.e., resistors, inductors and capacitors. It represents the morphological, structural and chemical characteristics of the bone scaffold. The developed models describe the impedance characteristics of plant tissue. In this study, it was found that the ε′ and ε″ of scaffold composites exhibited up and down trends over frequencies for both X-band and Ku-band. The circuit models presented the lowest mean percentage errors of Z′ and Z″, i.e., 3.60% and 13.80%, respectively.

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

Cited by 2 publications

References 15 publications

LTCC-packaged Branch-line Coupler Using Capacitance Improved Capacitor for VHF-band Applications

LTCC-packaged Branch-line Coupler Using Capacitance Improved Capacitor for VHF-band Applications

Lumped-Element Circuit Modeling for Composite Scaffold with Nano-Hydroxyapatite and Wangi Rice Starch

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