Monolithic Millimeter-Wave Air-Filled Waveguide Resonator for Filter Applications

Jones, Thomas R.; Vahabisani, Nahid; Der, Eric T.; Daneshmand, Mojgan

doi:10.1109/lmwc.2019.2910139

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…It has a negligible effect on the performance of the filter for two reasons: on the one hand, the side length of the aperture is much less than the minimum operating wavelength of the filter; on the other hand, the intensity of the electric field is quite small at the position of the square apertures. The CPWto-HMWG transitions are designed at both ends of HMWG filter based on [9,10]. In each transition, there is a copper step with a rectangular copper patch to connect the top layer and gold ground.…”

Section: Design and Simulationmentioning

confidence: 99%

“…It shows that the transitions and sidewalls are not vertical. This is due to the effect of photoresist reflow of the sacrificial layer during the subsequent baking of the mold layer [10]. The non-vertical profile of the sidewall in the fabricated profile causes the effective HMWG width to be smaller than the initial unrevised simulation model with vertical profiles.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…In addition to waveguide interconnects, mm-wave electronic communication systems demand many other passive components such as filters. The authors recently proposed a reduced-height air-filled 3D waveguide filter at W-band in [10]. A thick film microfabrication process was used, exploiting an inductively coupled half-wavelength waveguide cavity.…”

Section: Introductionmentioning

confidence: 99%

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Microfabrication of monolithic wafer-level miniaturized millimeter-wave air-filled half-mode waveguide filter based on the inward curving split ring resonator array

et al. 2020

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In this paper, we propose a miniaturized monolithic bandpass filter utilizing an air-filled halfmode waveguide and an inward curving split ring resonator array in the millimeter-wave band. The waveguide blocks the wave below cutoff frequency and the uniplanar array forms a rejection band above the transmission band. The microfabrication process of the filter adopts photoimageable technology and the combination of films with different thicknesses to build a 3D structure. The measured prototype has a center frequency at 65.5 GHz with a 3 dB fractional bandwidth of 30.7%. The minimum insertion loss is 2.1 dB. The proposed component offers excellent performance including a wide transmission band, a low pass-band insertion loss, an excellent isolation in the stop-band, and a steep roll-off at the upper cutoff frequency. Besides, due to the scalability of the waveguide and periodic array, this filter can be adapted for other frequency ranges.

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Section: Design and Simulationmentioning

confidence: 99%

Section: Fabrication and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microfabrication of monolithic wafer-level miniaturized millimeter-wave air-filled half-mode waveguide filter based on the inward curving split ring resonator array

et al. 2020

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Monolithic ceramic waveguide filter using a transition between GCPW feed and ceramic waveguide for 28 GHz

Park,

Park

2024

Micro & Optical Tech Letters

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In this letter, a mm‐wave monolithic ceramic waveguide filter using a transition between a grounded coplanar waveguide (GCPW) feed and a ceramic waveguide has been proposed. The published studies on monolithic ceramic waveguide filters with wideband properties for the mm‐wave are lacking. A desired external quality factor, satisfying wide bandwidth, is achieved using both inductive and capacitive couplings in the transition. The inductive coupling is realized with a waveguide's hole directly connected to the microstrip line probe of the GCPW. The capacitive coupling is employed with the slots of both GCPW and ceramic waveguide, which are placed facing each other. Adopting the presented transition, the inline monolithic ceramic waveguide filter for a fourth‐order Chebyshev response was designed. The fabricated filter provided the insertion and return losses of lower than 1.2 dB and higher than 10 dB, respectively, at frequencies from 26.43 to 29.76 GHz, with a fractional bandwidth of 11.85%.

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Fabrication and high-frequency characterization of low-cost fan-in/out WLP technology with RDL for 2.5D/3D heterogeneous integration

Sun²,

et al. 2022

Microelectronics Journal

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Monolithic Millimeter-Wave Air-Filled Waveguide Resonator for Filter Applications

Cited by 10 publications

References 9 publications

Microfabrication of monolithic wafer-level miniaturized millimeter-wave air-filled half-mode waveguide filter based on the inward curving split ring resonator array

Microfabrication of monolithic wafer-level miniaturized millimeter-wave air-filled half-mode waveguide filter based on the inward curving split ring resonator array

Monolithic ceramic waveguide filter using a transition between GCPW feed and ceramic waveguide for 28 GHz

Fabrication and high-frequency characterization of low-cost fan-in/out WLP technology with RDL for 2.5D/3D heterogeneous integration

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