Very Compact and Low-Profile LTCC Unbalanced-to-Balanced Filters With Hybrid Resonators

Tamura, Masaya; Yang, Tao; Itoh, T.

doi:10.1109/tmtt.2011.2141678

Cited by 24 publications

(12 citation statements)

References 17 publications

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“…The appearance of LTCC and analogous technologies allows one to create structures with 10 or even more layers and to reduce the size of a resonator several times. The best results are achieved when ideas developed for planar structures [9] are applied to the multilayered structure [22]. In this case, filters become compact, and the Q-factor of their resonators becomes higher than analogs [23].…”

Section: Introductionmentioning

confidence: 99%

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Belyaev¹,

Сержантов²,

Bal'va³

et al. 2017

PIER C

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Abstract-A compact microstrip resonator based on the interdigital structure is proposed. The resonator has several times higher unloaded quality factor compared to similar resonators presented previously and can even reach the Q-factor of a regular λ/4 resonator. The size of the resonator can be significantly reduced with a substantial increase in quality factor by incrementing the number of fingers in the interdigital structure. In addition, for each gap between the fingers, there exist an optimal number of fingers that correspond to the maximum Q-factor. An extension of the upper stopband for a bandpass filter designed using the resonator can be achieved by the interconnection of the fingers in each of the comb structures. The simulation results are proven by fabricated resonators and a fourpole bandpass filter. For the central frequency of 2000 MHz and 16.2% fractional bandwidth, the lateral size of the filter is only 11.5 mm × 3.8 mm for alumina substrate (eps = 9.8). The filter has an upper stopband up to 5.8f 0 at the level −40 dB.

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Section: Introductionmentioning

confidence: 99%

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Belyaev¹,

Сержантов²,

Bal'va³

et al. 2017

PIER C

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“…These filters usually occupy a large circuit area because of the planar arrangement of the resonators. As multimedia satellite communication requires components with low weight, small size and high reliability, multilayer low-temperature cofired ceramic (LTCC) technology has been considered as an attractive solution [5][6][7][8][9][10][11][12][13][14][15]. LTCC band-pass filters were introduced in [5][6][7][8][9] while dual band filters implemented in LTCC technology were proposed in [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…LTCC band-pass filters were introduced in [5][6][7][8][9] while dual band filters implemented in LTCC technology were proposed in [10,11]. Design approaches for realizing very compact and lowprofile unbalanced LTCC filters were presented in [12]. Antennas were also envisaged in this technology, a Bluetooth antenna being implemented in LTCC technology [13].…”

Section: Introductionmentioning

confidence: 99%

Design of Compact Dual-Band Filter in Multilayer LTCC With Cross Coupling

Zhou¹,

Guo²,

Lei³

et al. 2013

PIER

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Abstract-A very compact low temperature co-fired ceramic (LTCC) dual-band filter is designed based on the proposed novel crosscoupling structure in this paper. A six-pole dual-band filter with four transmission zeros is synthesized using an analytical procedure. By incorporating the proposed novel cross-coupling structure and analyzing the coupling characteristic, the dual-band filter is realized with canonical topology in multilayer LTCC. It is demonstrated by the simulation and experiment that the proposed dual-band filter has both compact size and good selectivity.

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“…Most of the recent works on single-to-balanced bandpass filter or balun filter designs utilize the low-temperature cofired ceramic (LTCC) process to achieve effective circuit size reduction through the 3D layout [1], [3]- [4], [6]- [7], [9]. However, due to the larger fabrication error of the LTCC, it is not quite suitable for the mass production of these circuits at millimeter-wave frequencies.…”

Section: Introductionmentioning

confidence: 99%

A 24-GHz single-to-balanced multicoupled line bandpass filter in CMOS technology

You

Lin

2012

2012 Asia Pacific Microwave Conference Proceedings

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In this work, on-chip single-to-balanced bandpass filter centered at 24 GHz is proposed. The functions of bandpass filter and balun are integrated using a simple multicoupled line structure along with capacitive loadings. The use of inductor is avoided such that very compact chip size can be achieved. It can be easily designed with the desired bandpass response and reference impedances through the conventional filter synthesis techniques. Specifically, a 3rd-order single-tobalanced bandpass filter design with a center frequency of 24 GHz and a fractional bandwidth of about 15% is presented using the 0.18-m CMOS technology. The chip size is 0.533 mm×0.443 mm and the corresponding electrical size is only 0.085 g ×0.07 g at the center frequency. In addition, good selectivity and balanced performance are obtained.

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Very Compact and Low-Profile LTCC Unbalanced-to-Balanced Filters With Hybrid Resonators

Cited by 24 publications

References 17 publications

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

High-Quality Compact Interdigital Microstrip Resonator and Its Application to Bandpass Filter

Design of Compact Dual-Band Filter in Multilayer LTCC With Cross Coupling

A 24-GHz single-to-balanced multicoupled line bandpass filter in CMOS technology

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