Part 2 looked at two types of RF/microwave filters, but there are many more, including ceramic coaxial filters and helical filters. They are discussed in this part. Microstrip filters Microstrip filters are built as a carefully defined pattern on a PC board. There is almost no limit to the filter designs which can be built […]
The single-chip loudspeaker: First fully MEMS-based speakers target earphone apps
What is billed as the world’s first monolithic true MEMS speaker is just one millimeter thick and is said to deliver high fidelity, full-bandwidth sound and low total harmonic distortion (THD) for sealed in-ear personal audio devices, including true wireless stereo (TWS) earbuds. Called Montara by its creator xMEMS Labs in Los Altos, Calif., the […]
RF/Microwave bandpass filter implementations, Part 2: Cavity and comb filters
The well-known and extensively analyzed lumped-element bandpass filter is generally not suitable for the RF/microwave region, but there are many distributed-element, energy-based alternatives. Part 1 of this article established the context for these RF/microwave filters, which operate in the spectrum from several hundred MHz and higher, and increasingly cannot use discrete lumped-circuit elements (RLCs). Instead, […]
RF/Microwave bandpass filter implementations, Part 1: Distributed filters
The well-known and extensively analyzed lumped-element bandpass filter is generally not suitable for the RF/microwave region, but there are many distributed-element, energy-based alternatives. Just say the word “filters,” and for many engineers, the mention of this topic stirs a mix of feelings ranging from fear to relief. Why fear? Because filters as a topic in […]
Lasers, optics, electronics and more yield terahertz sources, Part 1 – Context
The terahertz part of the electromagnetic spectrum between millimeter waves and optical range remains a largely untapped, difficult-to-use resource; researchers are investigating different techniques for efficiently generating terahertz waves to promote the use of this part of the spectrum. Electromagnetic energy in the terahertz (THz) region of the spectrum, nominally 300 GHz/0.3 THz to 10 […]
Software helps design and assess E/E systems, enable end-to-end model-based design
An expanded Capital electrical/electronic (E/E) systems development software portfolio now encompasses E/E system and software architectures, network communications and embedded software development. As part of the Xcelerator portfolio of software, services and application development platform, Capital is integrated with adjacent Siemens solutions, including the Teamcenter portfolio for product lifecycle management, NX software for mechanical design […]
Small high-capacitance three-terminal MLCCs target automotive uses
Murata Electronics today announced the availability of two new multilayer ceramic capacitors (MLCCs) for automotive safety-critical applications. The 0402-inch size (1.0×0.5mm) NFM15HC105D0G3D is the world’s smallest three-terminal low parasitic inductance (ESL) MLCC. The NFM18HC106D0G3L is also a three-terminal low-ESL MLCC but delivers the world’s highest capacitance of 10µF in a 0603 (1.6×0.8mm) package. The NFM15HC105D0G3D […]
Gasket material suppresses signal interference, reduces force on sensitive electronic components
As design engineers create smaller and more powerful electronics, they must place sensitive components closer together, which can increase to damaging levels the force placed on these components. A new fabric-over-foam gasket from Laird Performance Materials features a soft silicone foam core with a low compression force that suppresses electromagnetic interference without damaging sensitive components. The EcoTemp […]
The microstrip antenna, Part 2: Implementation
The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations. Part 1 of this FAQ was a brief review of antennas and introduced to microstrip antenna design. This part continues that exploration along with related issues. Q: What’s the difference, if any, between a […]
Electromechanical relay switches cover 6.5 GHz to 40 GHz in SPDT, DPDT options
Pasternack has just launched a new series of Double Ridge Waveguide Electromechanical Relay Switches which perform over broader frequency bands, making them ideal for applications involved with electronic warfare, electronic countermeasures, microwave radio, VSAT, radar, test instrumentation, and research and development. This comprehensive selection of 12 new double ridge waveguide electromechanical switch models are now available featuring […]
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