Microwave and Magnetostatic Characterization of Ferrite LTCC for Tunable and Reconfigurable SiP Applications

Shamim, Atif; Bray, Joey R.; Hojjat, N.; Elasoued, R.A.; Baillargeat, Dominique

doi:10.1109/mwsym.2007.380014

Cited by 27 publications

(32 citation statements)

References 6 publications

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“…A two-resonator Chebyshev design with a ripples level of 0.1 dB and a fractional bandwidth of 6% has been done [9]. The ferrite LTCC tape is ESL 40012 with a dielectric constant of 13.5 and an electric loss tangent of 0.004 [3]. From [10], the unbiased relative permeability ( ) is calculated to be 0.65.…”

Section: Tunable Filter Designmentioning

confidence: 99%

“…Tunability of filters can be achieved by many techniques among which the methods that are based on functional materials (ferroelectric and ferrite) are particularly suitable for miniaturized SoP applications because they can be incorporated in the 3-D package. The integration of ferroelectric materials with LTCC has been studied in [2], and the use of the ferrite LTCC has been demonstrated in [3].…”

Section: Introductionmentioning

confidence: 99%

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Tunable Bandpass Filter Based on Partially Magnetized Ferrite LTCC With Embedded Windings for SoP Applications

Arabi

Ghaffar

Shamim

2015

IEEE Microw. Wireless Compon. Lett.

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Tunable filters that are based on ferrite materials often require large and bulky electromagnets. In this work, we present a tunable filter in the Ku-band, which is realized in multilayer ferrite LTCC substrate with embedded bias windings, thus negating the need of a large electromagnet. Also, because of the embedded windings, the bias fields are not lost at the air-substrate interface and therefore the field and current requirements are reduced by an order of magnitude as compared to the previously reported filters. A simulation strategy that uses full permeability tensor with arbitrarily directed magnetic fields has been used to model the filter on a partially magnetized ferrite substrate. Special attention has also been paid to approximate the non-uniform magneto-static fields produced by the embedded windings. The complete design is implemented in 10 layers of ferrite LTCC, making it the first magnetically tunable filter with embedded windings and extremely small size [(5 5 ) ]. The filter demonstrates a measured tunability of 4% and an insertion loss of 2.3 dB. With the small form factor, embedded windings, and low bias requirements, the design is highly suitable for compact and tunable SoP applications.Index Terms-Bandpass filter (BPF), ferrite, low temperature co-fired ceramics (LTCC), system on package (SoP).

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Section: Tunable Filter Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable Bandpass Filter Based on Partially Magnetized Ferrite LTCC With Embedded Windings for SoP Applications

Arabi

Ghaffar

Shamim

2015

IEEE Microw. Wireless Compon. Lett.

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“…The value of the ma provided by ESL (Electro-Scien taken from the literature [5][6][7][8][9] . The permeability of about 60.…”

Section: Specifications and Designmentioning

confidence: 99%

Low-profile small-size ferrite cores for powerSiP integrated inductors

Nguyen

Brunet²,

Laur³

et al. 2013

2013 15th European Conference on Power Electronics and Applications (EPE)

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Ferrite-based micro-inductors integrated on silicon are proposed as potential hybrid integration in lowpower medium frequency DC-DC power converters. The inductors are fabricated at wafer level using micromachining and flip chip assembling techniques. The proposed process is based on a sintered ferrite core placed in between thick electroplated copper windings on two silicon substrates. The low profile (110 µm thick) ferrite cores are produced by thermal bonding of two green tape-casted films of 1.2 × 2.6 × 0.2 mm 3 , then micro-milled to the final dimensions before sintering. This paper presents the magnetic characterization of the sintered ferrite films cut in rectangular shape and sintered at different temperatures. It is concluded that these small dimension cores could be used in the frequency range applications of 5-10 MHz and would potentially allow a high inductance density in a 3D integration process.

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“…LTCC (Low Temperature Co-fired Ceramics) has become the key technology of packaging for the integrated of passive components due to its higher performance, reliability and plays an important role in increasing higher frequency, decreasing the loss [1][2][3]. LTCC is a solid, dense and reliable package, to make multi-storey structure, by integrating passive components such as resistors, capacitors and inductors to achieve miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Design of band-pass filter based on different materials in LTCC/LTCF technology

Yue-jin¹,

Mengjiang²,

Yintang³

2011

2011 12th International Conference on Electronic Packaging Technology and High Density Packaging

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A band-pass filter based on different materials in LTCC/LTCF technology is proposed in this letter. The BPF was constructed with three-order Chebyshev coupled resonators configuration. With the conventional LTCC technology we can't get big inductance due to the limitation of permeability of ceramics for miniaturization. So we can't get conventional lumped filters with low resonance frequency. In LTCC we insert several ferrite layers in ceramic, due to the high permeability we can get big inductance and conventional lumped filters with low resonance frequency. The BPF fabricated by LTCC/LTCF process has small size (2.4mm*4.8mm*1.2mm). The middle frequency is 10MHz, the bandwidth is 2MHz, the insertion loss is O.5dB, and the inhibit degree of outside band is 30dB. This paper mainly focuses on the design and fabrication by LTCF technology.

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Microwave and Magnetostatic Characterization of Ferrite LTCC for Tunable and Reconfigurable SiP Applications

Cited by 27 publications

References 6 publications

Tunable Bandpass Filter Based on Partially Magnetized Ferrite LTCC With Embedded Windings for SoP Applications

Tunable Bandpass Filter Based on Partially Magnetized Ferrite LTCC With Embedded Windings for SoP Applications

Low-profile small-size ferrite cores for powerSiP integrated inductors

Design of band-pass filter based on different materials in LTCC/LTCF technology

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