Selecting Capacitors for Charge Storage in Radar Power Amplifiers

Posted by Peter Matthews on Jul 31, 2024 8:15:00 AM

The types of threats facing radar systems are continuing to diversify. To adapt, the industry is evolving toward fully digital arrays that can support a variety of mission profiles. As these systems grow more and more complex, component-level decisions have an increasingly significant impact on overall performance.   

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Topics: Capacitor

The Role of EMI Filters in Power Electronics

Posted by Peter Matthews on Jul 24, 2024 8:15:00 AM

As power conversion systems evolve to leverage higher voltages and wide bandgap semiconductors like silicon carbide (SiC) and gallium nitride (GaN), system designers face new challenges in managing the electromagnetic interference (EMI) frequency landscape. Here’s how EMI filters play an important role in ensuring safe operation at higher voltages. 

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Topics: Capacitor

Capacitors Support Radar MMIC Amplifiers via Bypassing

Posted by Peter Matthews on Jul 17, 2024 8:15:00 AM

Monolithic microwave integrated circuit (MMIC) amplifiers are widely used in defense radar systems. The industry recognizes them as a compact, high-performance option that’s reliable and easy to integrate. Whether they serve a receive (e.g., low noise amplifier (LNA)) or transmit (e.g., power amplifier (PA)) function, MMIC amplifiers rely on bypass capacitors to perform their core function to amplify microwave signals. 

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Topics: Capacitor

Material Choices: An Important Criterion in Selecting High-Frequency Capacitors

Posted by Cheriyan Perumal on Jul 10, 2024 8:00:00 AM

Radio frequency (RF) and microwave applications involve the transmission and receipt of high-frequency electromagnetic signals. RF refers toalternating current (AC) signals at 3 kHz to 300 GHz, and microwave refers to a higher range, closer to 300 MHz to 300 GHz. Capacitance, and by extension impedance, varies with frequency, so capacitors play a variety of critical roles in these RF and microwave circuits. With many options for configuration, they function in energy storage and voltage regulation, DC blocking, impedance matching, filtering and more. 

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Topics: Capacitor

Looking Closer at DC Link Capacitors in Electric Vehicles

Posted by Peter Matthews on Jul 3, 2024 8:44:22 AM

DC link capacitors are commonly used in power converters as an intermediary buffer between an input source to an output load that have different instantaneous power, voltages, and frequencies. In electric vehicle (EV) applications, DC link capacitors help offset the effects of inductance in inverters, motor controllers, and battery systems. They also serve as filters that protect EV subsystems from voltage spikes, surges, and electromagnetic interference (EMI).

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Topics: Capacitor, Automotive, Electric Vehicles

Trends in Battery Energy Storage Systems

Posted by Peter Matthews on Jun 26, 2024 8:15:00 AM

Battery energy storage systems (BESS) are named for their function. They capture, accumulate, and store energy in rechargeable batteries to be discharged later. Industrial facilities, homes, electric vehicles (EVs) and the like rely on these systems for backup power and operational efficiency.

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Common Capacitors in Solar Power Conversion Systems

Posted by Peter Matthews on Jun 20, 2024 8:02:00 AM

Ongoing innovation in solar power electronics and rising interest in photovoltaic (PV) installations underscores the importance of robust and efficient electronic components. Capacitors play a key role in power conversion systems as they function to smooth and regulate power flow, protect against voltage surges and filter unwanted signals. 

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Topics: Capacitor

Flexibility of Multilayer Ceramic Capacitors: Guaranteed 5mm of bend on AEC-Q200 certified components

Posted by Peter Matthews on Jun 12, 2024 8:46:17 AM

Today, with the continued drive for more technical features in conventional cars and the increasing electrification of the drive train, the challenges facing electronics designers are ever increasing. Alongside a drive to lower costs and smaller form factors, MLCC’s are being used in ever harsher applications and in ever increasing numbers. This is driving board population density upwards and with it concerns for reliability and particularly the likelihood of mechanical cracking. Thus electronic designers are now demanding flexibility that exceeds the current Automotive Electronic Council bend test specification (AEC-Q200 Rev D June 1, 2010).

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Topics: Capacitor, Automotive, Electric Vehicles

Capacitor Support in Power Amplification for Radar Systems

Posted by Peter Matthews on Jun 5, 2024 8:15:00 AM

In radar systems, power amplifiers serve an essential role in transmitting signals that probe the environment of interest. They boost signal strength and maintain its quality to achieve the intended range and resolution of the overall system.

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Fundamental Capacitor Functions in the World of Electronics

Posted by Peter Matthews on May 29, 2024 8:15:00 AM

When considering capacitor selection for a given circuit, whether you’re focused on power electronics or deep in the world of RF, it's important to remember that some of a capacitor’s fundamental roles are universal. 

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Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

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