Encyclopedia of RF and Microwave Engineering chapter book for Ring resonators
Abstract not provided.
Publications
Bandpass Filters with Localized Temperature Compensation in LTCC
Abstract not provided.
Bandpass Filters with Localized Temperature Compensation in LTCC
Abstract not provided.
Bandpass Filters with Localized Temperature Compensation in LTCC
Abstract not provided.
Miniature Lowpass Filters in Low Loss 9k7 Low Temperature Co-fired Ceramics
Abstract not provided.
Miniature low-pass filters in low-loss 9k7 LTCC
Journal of Ceramic Science and Technology
DuPont 9k7 low-temperature cofired ceramic (LTCC) is a low-loss, or high-quality-factor Q, tape system targeting at radio frequency (RF) applications. This paper reports on the effect of a critical process parameter, the heating rate, on the densification and dielectric properties of the 9k7 LTCC. The role of competing densification and crystallization during the sintering of 9k7 is discussed. The high Q of DuPont 9K7 can be used to improve RF system performance, for example a better receiver noise figure, by designing embedded passive RF components such as inductors, capacitors and filters. Miniaturized multilayer low-pass filters (LPF) with a wide stopband were fabricated to showcase the technology.
Miniaturized LTCC elliptic-function lowpass filters with wide stopbands
Microwave and Optical Technology Letters
A compact, high-selectivity, and wide stopband lowpass filter is highly demanded in wireless communication systems to suppress adjacent harmonics and unwanted signals. In this letter, a new miniaturized lowpass filter with elliptic-function frequency response is introduced. The filter is fabricated in multilayer low temperature cofired ceramics. The size of the miniaturized filter is 5.5 × 3.9 × 1.72 mm3. The measured insertion loss of the filter is better than 0.37 dB from DC to 1.28 GHz and the measured stopband of the filter is great than 22 dB from 2.3 to 7.5 GHz.
Miniature Lowpass Filters in Low Loss 9k7 Low Temperature Co-fired Ceramics
Abstract not provided.
Miniature lowpass filters in low loss 9k7 LTCC
IMAPS/ACerS 11th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2015
DuPont 9k7 low temperature cofired ceramic (LTCC) is a low loss, or high quality factor Q, tape system targeting at radio frequency (RF) applications. This paper reports the effect of a critical process parameter, heating rate, on the densification and dielectric properties of the 9k7 LTCC. The role of competing densification and crystallization during the sintering of 9k7 is discussed. The high Q of DuPont 9K7 can be used to improve RF system performance, for example a better receiver noise figure, by designing embedded passive RF components such as inductors, capacitors and filters. Miniaturized multilayer low pass filters (LPF) with a wide stopband were fabricated to showcase the technology.
Bandpass Filters With Localized Temperature Compensation in LTCC
Abstract not provided.
Bandpass Filters With Localized Temperature Compensation Dielectrics in Low Temperature Co-fired Ceramic Packages
IEEE Transactions on Components and Packaging Technologies
Abstract not provided.
Global and Localized Temperature Stability in Low Temperature Cofired Ceramic (LTCC)
Abstract not provided.
Temperature Compensated Bandpass Filters in LTCC
The International Journal of Applied Ceramic Technology
Abstract not provided.
Temperature Compensated Bandpass Filters in LTCC
Abstract not provided.
Temperature Compensated Bandpass Filters in LTCC
Abstract not provided.
Global and Localized Temperature Stability in LTCC
Abstract not provided.
Effective Compensation of the Temperature Coefficient of Resonant Frequency in LTCC
Abstract not provided.
Localized temperature stability in Low Temperature Cofired Ceramics (LTCC)
The base dielectrics of commercial low temperature cofired ceramics (LTCC) systems have a temperature coefficient of resonant frequency ({tau}{sub f}) in the range -50 {approx} -80 ppm/C. In this research we explored a method to realize zero or near zero {tau}{sub f} resonators by incorporating {tau}{sub f} compensating materials locally into a multilayer LTCC structure. To select composition for {tau}{sub f} adjustment, {tau}{sub f} compensating materials with different amount of titanates were formulated, synthesized, and characterized. Chemical interactions and physical compatibility between the {tau}{sub f} modifiers and the host LTCC dielectrics were investigated. Studies on stripline (SL) resonator panels with multiple compensating dielectrics revealed that: 1) compositions using SrTiO{sub 3} provide the largest {tau}{sub f} adjustment among titanates, 2) the {tau}{sub f} compensation is proportional to the amount of SrTiO{sub 3} in compensating materials, as well as the thickness of the compensating layer, and 3) the most effective {tau}{sub f} compensation is achieved when the compensating dielectric is integrated next to the SL. Using the effective dielectric constant of a heterogeneous layered dielectric structure, results from Method of Momentum (MoM) electromagnetic simulations are consistent with the experimental observations.
Effective Compensation of the Temperature Coefficient of Resonant Frequency in LTCC
Abstract not provided.
19 Results