Cavity Resonator Filters Basics

Posted by doEEEt Media Group
On June 26, 2024
0

Cavity filters use metallic cavities to form resonators, where electromagnetic waves create standing waves at specific frequencies. These filters, including combline and interdigital types, offer high selectivity and performance up to 30GHz. Despite their size, innovative designs can make them comparable to microstrip or ceramic filters.

EEE Components, PASSIVES

Lumped Element L-C Filters Design and Characteristics

Posted by doEEEt Media Group
On June 26, 2024
0

Lumped element filters are passive filters made with inductors (Ls), capacitors (Cs), and resistors (Rs) to meet specific filtering needs. They use simple L-C resonators to create poles and zeros in the frequency response, allowing tight control over the filter's performance. These filters are compact, customizable, and can withstand harsh conditions. They can be designed as lowpass, highpass, bandpass, or band-reject filters. Their frequency ranges span from 10 MHz to 22 GHz, making them versatile for various applications.

EEE Components, PASSIVES

How Cell Balancing Methods Affects Capacitor Selection

Posted by doEEEt Media Group
On August 22, 2023
0

While passive cell balancing was once the more common technique, some EV manufacturers are shifting to active cell balancing in response to BMS advancements. This change impacts component selection at all levels, including capacitor selection.

EEE Components, PASSIVES

Knowles Precision Devices Expands its Enhanced Safety-Certified SMD MLCC Capacitors

Posted by doEEEt Media Group
On May 4, 2021
0

The new capacitors offer customers a unique combination of capability and safety certification and meet the demands of AEC-Q200 standards, modems, and AC-DC power supplies where a lightning strike or other voltage transients represent a threat to electronic equipment.

EEE Components, PASSIVES

Knowles Precision Devices Released 100nF Single Layer Ceramic V-series Capacitor

Posted by doEEEt Media Group
On March 12, 2021
0

Knowles Precision Devices are expanding its V-Series of single-layer capacitors by 100nF capacitor. In RF bypassing applications, the 100nF can help eliminate supply line noise. High-frequency monolithic microwave integrated circuit (MMIC) amplifiers with broadband gain need to be protected from RF noise on supply lines. Supply noise can mix with RF signals, impacting signal-to-noise ratios and potentially causing spurious output. A bypass capacitor provides an efficient path to the ground for RF energy on the supply line before it enters a gain stage.

EEE Components, PASSIVES, SPECIFICATIONS / QPLs

Issue 214 of ESCC QUALIFIED PART LIST (QPL)

Posted by Javier Alejandro de la Ossa Fernández
On March 8, 2021
0

The changes in issue 214 of ESCC QUALIFIED PART LIST (QPL) are included in the DCR 1395 and detailed herein below

EEE Components, PASSIVES

Clarifying MIL-STD-461 and EMI Filter Misconceptions

Posted by doEEEt Media Group
On November 19, 2020
0

The US MIL-STD-461 specification manages electromagnetic interference emissions by setting limits on the levels that can be emitted from electrical equipment. This specification also sets regulation to control equipment susceptibility to external noise sources and establishes guidelines for properly measuring the relevant equipment features.

EEE Components, PASSIVES

Knowles MLCC Capacitor Stacks Offer up to 220μF for PSU Filtering

Posted by doEEEt Media Group
On August 7, 2020
0

Knowles Precision Devices, a division of Knowles Corporation, recently expanded its capacitor assembly offering with the release of its new SV series of capacitor assemblies for power supply filtering applications. The SV series is a vertically stacked ceramic capacitor, offering superior performance compared with aluminium or tantalum electrolytic capacitors, while also helping to reduce the overall circuit board footprint.

EEE Components, PASSIVES

Trimmer Capacitor Considerations in Practice

Posted by doEEEt Media Group
On August 3, 2020
0

Trimmer capacitors are variable components used to calibrate RF circuits during manufacturing or servicing. These components allow for variable tuning–think oscillator frequency values or rise and fall times. Should values drift over the life of the device, trimmer capacitors can be recalibrated as needed.

EEE Components, PASSIVES, RF & MW

Choosing the right blocking capacitors

Posted by doEEEt Media Group
On April 23, 2020
0

Any engineer knows that capacitors are a fundamental building block in RF/microwave systems. Bypass networks are one example—they require capacitors to bypass ac signals to ground. For such cases, rules-of-thumb or approximate equations can be used to select the best capacitor for the job.

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