Compact LTCC Bandpass Filter With Wide Stopband Using Discriminating Coupling

Zhang, Xiu Yin; Dai, Xin; Kao, Hsuan‐Ling; Wei, Bai-Hong; Cai, Zhongyu; Xue, Quan

doi:10.1109/tcpmt.2013.2297522

Cited by 49 publications

(25 citation statements)

References 23 publications

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“…6. Comparison between some other wide stopband ridge bandpass filters ( [7][8][9][10]) and the proposed structure is listed in Table 2. This newly proposed structure is able to extend the bandwidth to 25% compared to [7] while maintaining a wide stopband with 4f 0 @20 dB.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A Compact Quarter-Mode Siw Bandpass Filter With an Extremely Wide Stopband

Yang¹,

Li²,

Wu³

et al. 2017

PIER Letters

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Abstract-This paper presents a C-band wide stopband bandpass filter (BPF) using quarter mode substrate integrated waveguide (QMSIW) cavities. The BPF is simply constructed by combining Sshaped slot and L-shaped slot loaded quarter-mode substrate integrated waveguide. A special negative coupling scheme with symmetrical S-shaped slots on the top and bottom metal planes connected by metallic vias is developed. The proposed structure provides more design flexibility in arranging the pitch of vias owing to the extended slot length. The filter has fractional bandwidth of 25% at center frequency of 5.5 GHz with return loss better than 24 dB and insertion loss less than 1.1 dB. Moreover, its first spurious response occurs at 22.5 GHz (about four times the central frequency), exhibiting an extremely wide stopband performance. An experimental SIW filter was fabricated, and good agreement was achieved between the simulated and measured results.

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Section: Resultsmentioning

confidence: 99%

“…In [8], a narrow-band filter with poor performance was obtained, and the circuit size is larger than the proposed one. In [10], the filter has compact size with high selectivity and wide stopband. However, its insertion loss is not very good.…”

Section: Resultsmentioning

confidence: 99%

A Compact Quarter-Mode Siw Bandpass Filter With an Extremely Wide Stopband

Yang¹,

Li²,

Wu³

et al. 2017

PIER Letters

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“…The feeding lines provided a broadside coupling to the resonators on layer 2. At the other end of the feeding lines, the ground vias were connected to generate three transmission zeros (TZs) because of the inductive source-load coupling [15]. Two resonators were meandered on layer 2 and coupled with each other using an interdigital capacitor.…”

Section: Various Lamination Bonding Percentagesmentioning

confidence: 99%

Inkjet-Printed Interdigital Bandpass Filter with Wide Stopband Using Multilayer Liquid Crystal Polymer Technique

Chang

Cho

Bachani

et al. 2018

International Journal of Antennas and Propagation

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This article presents a two-layer inkjet-printed interdigital bandpass filter using lamination bonding process on liquid crystal polymer (LCP) substrates for radio frequency electronic applications. Various percentages of torque force were applied over a 4 × 4 cm 2 area with a 942 kg fixed force in the lamination bonding process. The insertion loss and surface morphology of the inkjet-printed silver film were examined on various torque forces to develop the lamination bonding process. The lamination bonding was performed at 12% torque and 270°C. A three-dimensional bandpass filter was realized with a S 21 of −2.2 dB at 11.5 GHz with a 17% fractional bandwidth. A multilayer inkjet-printed bandpass filter was successfully developed to verify the design methodology and fabrication of inkjet-printing technology and lamination bonding technique for a three-dimensional integrated circuit package.

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“…Compared with the designs in [2] and [20], the proposed BPF shows a compact size and a wider bandwidth. The designs in [3], [5], and [17] realize the wide stopband LTCC filter with a comparable electrical size. However, the stopband frequency range is narrower than the proposed one with the thirdharmonic suppression and the fifth-harmonic suppression.…”

Section: Experiments and Comparisonmentioning

confidence: 99%

“…Discriminating coupling, which can block the unwanted signals and pass the wanted ones [16], is an effective way to realize wide stopband LTCC BPFs without adding extra circuits. In [17], discriminating coupling is deployed between the two resonators to suppress the third harmonic. However, other high-order harmonics cannot be suppressed, because there is only one interresonator coupling region, which can only be used to suppress the third harmonic.…”

Section: Introductionmentioning

confidence: 99%

Microwave and Millimeter-Wave LTCC Filters Using Discriminating Coupling for Mode Suppression

Guo

Zhang

Gao

et al. 2016

IEEE Trans. Compon., Packag. Manufact. Technol.

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In this paper, a new discriminating coupling mechanism, which is realized by choosing suitable coupling region between the feeding lines and resonators, is proposed to suppress the unwanted resonance modes without affecting the desirable operating modes. Utilizing such a coupling mechanism, two low-temperature cofired ceramic (LTCC) bandpass filters (BPFs) are designed operating at microwave and millimeter-wave bands. One BPF realizes a wide stopband, since the third and fifth harmonics are suppressed by the discriminating coupling. The other one is an oversized 60-GHz BPF with the fundamental mode suppressed by the discriminating coupling. Due to the multilayer characteristics of the LTCC techniques, the circuit layout can be controlled flexibly to realize desirable discriminating coupling. The two filters are theoretically analyzed and implemented. Good agreement between the simulation and the measurement validates the proposed method.

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Compact LTCC Bandpass Filter With Wide Stopband Using Discriminating Coupling

Cited by 49 publications

References 23 publications

A Compact Quarter-Mode Siw Bandpass Filter With an Extremely Wide Stopband

A Compact Quarter-Mode Siw Bandpass Filter With an Extremely Wide Stopband

Inkjet-Printed Interdigital Bandpass Filter with Wide Stopband Using Multilayer Liquid Crystal Polymer Technique

Microwave and Millimeter-Wave LTCC Filters Using Discriminating Coupling for Mode Suppression

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