Advanced ceramic packaging for microwave and millimeter wave applications

Wein, D.S.

doi:10.1109/8.410210

“…These can be provided by reliable packaging that preserves the electrical performance of the enclosed MMICs [34]. Plastic, metal, ceramic, and thin-film multilayer packages have been used in the design of MCMs [35], [36]. Due to its mechanical reliability, good thermal conductivity, electromagnetic shielding, and manufacturability, a brass package was designed for the RF-MCM of the CMR-H, with gold plating to reduce chemical oxidation, as shown in Fig.…”

Section: Implementation Of the Rf Section In An MCMmentioning

confidence: 99%

A Miniaturized Spectrometer Radiometer Based on MMIC Technology for Tropospheric Water Vapor Profiling

Iturbide-Sanchez

¹

,

Reising

²

,

Padmanabhan

³

2007

IEEE Trans. Geosci. Remote Sensing

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Abstract-The fabrication of a miniaturized ground-based water vapor profiling radiometer demonstrates the capability of monolithic microwave and millimeter-wave integrated circuit technology to reduce the mass and volume of microwave remote sensing instrumentation and to reduce substantially the necessary operational power consumption and size of the radiofrequency and intermediate-frequency sections. Since those sections comprise much of the mass and volume of current microwave receivers, the fabrication of this system represents an important contribution to the design of microwave radiometers. This miniaturized radiometer implementation is particularly well suited to benefit from the cost savings associated with mass production. The small size of the radiometer (24 × 18 × 16 cm) reduces the power required by the temperature control system and allows a rapid warm-up to the temperature set point as well as maintenance of a highly stable internal temperature. Exhibiting very similar statistical properties, the four channels of the radiometer have measured Allan times of greater than 40 s. Measurement results demonstrate that the instrument achieves a sensitivity of better than 0.2 K for 3 s of integration time. Preliminary comparisons of measured brightness temperatures with simulation results based on radiosonde data show good agreement, which are consistent with previously reported results.Index Terms-Atmospheric measurements, humidity measurement, microwave radiometry, monolithic microwave and millimeter-wave integrated circuits (MMICs), multichip modules (MCMs), remote sensing.

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“…Since the FDTD simulation calculates the total field, which is the sum of the incident and reflected waveforms, the incident field is obtained from a line of an infinite extent and is subtracted from the total waveform to yield the reflected field. 10.…”

Section: Frequency [Ghz]mentioning

confidence: 99%

Modeling of hermetic transitions for microwave packages

Yook

¹

,

Dib

²

,

Yasan

³

et al. 1996

Int. J. Microw. Mill.-Wave Comput.-Aided Eng.

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Two numerical techniques, the finite difference in time domain (FDTD) and the finite element method (FEM) in frequency domain, are employed to characterize microstrip hermetic transition geometries in an effort to investigate high-frequency effects. Measurements performed on these transitions compare favorably with theory. Two different types of transitions have been analyzed from 10 to 25 GHz and have been found to be limited in performance by higher return loss as frequency increases. It is shown that microstripthrough-CPW hermetic transitions in the shielded environment may suffer from parasitic waveguide modes which, however, can be eliminated with the use of vias at appropriate locations. The hermetic wall on top of the CPW section shows a relatively small (I 2 dB) effect on the original circuit performance. Similarly, the hermetic bead transition shows good performance at a lower frequency region while it degrades as frequency increases. This indicates the need for very careful characterization of transitions intended for use in microwave and millimeter-wave applications.

show abstract

“…Since the FDTD simulation calculates the total field, which is the sum of the incident and reflected waveforms, the incident field is obtained from a line of an infinite extent and is subtracted from the total waveform to yield the reflected field. 10.…”

Section: Frequency [Ghz]mentioning

confidence: 99%

Modeling of hermetic transitions for microwave packages

Yook¹,

Dib²,

Yasan³

et al. 1996

Int. J. Microw. Mill.‐Wave Comput.‐Aided Eng.

0

View full text Add to dashboard Cite

Two numerical techniques, the finite difference in time domain (FDTD) and the finite element method (FEM) in frequency domain, are employed to characterize microstrip hermetic transition geometries in an effort to investigate high-frequency effects. Measurements performed on these transitions compare favorably with theory. Two different types of transitions have been analyzed from 10 to 25 GHz and have been found to be limited in performance by higher return loss as frequency increases. It is shown that microstripthrough-CPW hermetic transitions in the shielded environment may suffer from parasitic waveguide modes which, however, can be eliminated with the use of vias at appropriate locations. The hermetic wall on top of the CPW section shows a relatively small (I 2 dB) effect on the original circuit performance. Similarly, the hermetic bead transition shows good performance at a lower frequency region while it degrades as frequency increases. This indicates the need for very careful characterization of transitions intended for use in microwave and millimeter-wave applications. 0 1996 John Wiley & Sons, Inc.

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Advanced ceramic packaging for microwave and millimeter wave applications

Cited by 14 publications

References 7 publications

A Miniaturized Spectrometer Radiometer Based on MMIC Technology for Tropospheric Water Vapor Profiling

A Miniaturized Spectrometer Radiometer Based on MMIC Technology for Tropospheric Water Vapor Profiling

Modeling of hermetic transitions for microwave packages

Modeling of hermetic transitions for microwave packages

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