A 60-GHz six-pole quasi-elliptic bandpass filter with novel feeding mechanisms based on silica-based post-wall waveguide

Uemichi, Yusuke; Nukaga, Osamu; Nakamura, Kei; Hasegawa, Yuta; Han, Xinjie; Hosono, Ryouhei; Kobayashi, Kiyoshi; Guan, Ning

doi:10.1109/mwsym.2017.8058844

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…Substrate-integrated waveguides have become a popular choice for filter design due to their high-quality factor, low cost, low loss, and easy planar integration [1][2][3][4][5][6]. With the rapid development of modern microwave and wireless communication systems, hybrid cross-coupling techniques have become widely used in microwave filters to meet performance specifications such as miniaturization, low cost, high selectivity, and strong out-of-band rejection of filters [7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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SIW Filter Based on a CPW Resonator and a Hybrid Electromagnetic Coupling Structure

Yan,

Guo,

et al. 2024

PIER Letters

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This paper proposes a hybrid cross-coupled filter that utilizes a coplanar waveguide (CPW) resonator and a hybrid electromagnetic coupling structure. The filter features a flexible and controllable position of transmission zeros and a quasi-elliptical response. It is composed of two CPW structures etched within the upper metal surface of a second-order substrate-integrated waveguide (SIW) resonant cavity. By adjusting the dimensions of the two CPW structures between the SIW resonant cavities and the width of the inductive coupling window, the strengths of the electric and magnetic couplings can be easily controlled to achieve a controllable hybrid crosscoupling effect in order to adjust the position of the transmission zeros and ultimately to realize the third-order filter with quasi-elliptical response characteristics. Simulation and test results indicate that the filter has a center frequency of 4.55 GHz, a −3 dB bandwidth of 180 MHz, a relative bandwidth of 4%, an insertion loss of −0.9 dB in the passband, a return loss of over 15 dB, and two transmission zeros located at 4.4 GHz and 4.7 GHz, respectively. The filter has several advantages, including a simple structure, low insertion loss, small circuit size, good frequency selectivity, and flexible and controllable transmission zeros. These features make it suitable for the use in 5G (sub-6 GHz) wireless communication systems.

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Section: Introductionmentioning

confidence: 99%

“…Ref. [8] proposes a 6th-order cross-coupled filter that achieves negative coupling through slots on the top wide walls of the two resonant cavities. The filter introduces two transmission zeros and realizes a quasi-elliptical response.…”

Section: Introductionmentioning

confidence: 99%

SIW Filter Based on a CPW Resonator and a Hybrid Electromagnetic Coupling Structure

Yan,

Guo,

et al. 2024

PIER Letters

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“…Meeting performance requirements of millimeterwave systems often requires integration of different guiding structures. Air-filled rectangular waveguide is common for antenna interfaces, whereas post-wall waveguides (PWW) are very suitable for realizing low-loss millimeter-wave filters (e.g., [8], [9], [10]), antennas ( [7]) or other circuits. For instance, the PWW-based filters can outperform the microstrip equivalents in terms of Q-factor, which in turn yields better selectivity [6].…”

Section: Introductionmentioning

confidence: 99%

W-Band Subharmonic Mixer With Silica-Based Post-Wall Waveguide Interface

Thuroczy¹,

Zhurbenko²,

Johansen³

et al. 2020

PIER Letters

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This paper presents the design of a compact size, passive, W to K band subharmonic mixer with post-wall waveguide (substrate integrated waveguide) RF input interface. The mixer is based on a silica-glass structure where the post-wall waveguide and microstrip line are on separate substrates. This configuration maximizes the performance as the substrate thicknesses can be separately optimized for the lowest loss and mono-mode operation. Integration of different types of guiding structures also allows realization of e.g., millimetre-wave waveguide filters and microstrip circuits in a single structure, while preserving low-cost, low-weight and compact size. Furthermore, post-wall waveguides can be easily interfaced with conventional rectangular waveguides, as demonstrated in the paper, which simplifies millimeter-wave circuit packaging and eventual system integration. Design methodology of the mixer and transition circuits as well as measurements are presented. Minimum conversion loss of 19.6 dB was achieved at 86 GHz with 13.7 dBm/32.4 GHz LO signal. The presented design would be suitable for the future W-band cellular, radar, or satellite communication systems.

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Silica-Based Packaging Structure for D-band RF module

Ito

Marumoto

2018

2018 IEEE/MTT-S International Microwave Symposium - IMS

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A 60-GHz six-pole quasi-elliptic bandpass filter with novel feeding mechanisms based on silica-based post-wall waveguide

Cited by 6 publications

References 5 publications

SIW Filter Based on a CPW Resonator and a Hybrid Electromagnetic Coupling Structure

SIW Filter Based on a CPW Resonator and a Hybrid Electromagnetic Coupling Structure

W-Band Subharmonic Mixer With Silica-Based Post-Wall Waveguide Interface

Silica-Based Packaging Structure for D-band RF module

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