Passive Components


  • Ferrite Beads Demystified

    High resolution, high performance converters and radio frequency (RF) systems require good power supply noise filtering and high frequency crosstalk reduction between analog and digital domains. An effective method for filtering high frequency power supply noise and cleanly sharing similar supply rails is the use of ferrite beads. A ferrite bead is a passive device that filters high frequency noise energy over a broad frequency range, where it then becomes resistive and dissipates noise energy in the form of heat. This application note presents and discusses Analog Devices’ products that demonstrate the effects of ferrite beads as output filters.

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L-Band Couplers L-Band Couplers

ETL Systems offers L-band (850-2150 MHz) directional couplers featuring 10 dB or 20 dB with DC, and 10 MHz pass between input and transmit ports. These devices are available in 50 Ω SMA, N-type, BNC and 75 Ω BNC or F-type RF connector options, and have coupled ports that are DC blocked.

Compact Directional Coupler: Model 181230 Compact Directional Coupler: Model 181230

KRYTAR’s new directional coupler is a superior performance narrow band product covering the 12.4 to 18.0 frequency range. Adding to the selection of multi-purpose, stripline designs that exhibit excellent coupling, Model 181230 enhances the product line with performance ratings including Nominal Coupling (with respect to output) of 30 dB (±1.0 dB), and Frequency Sensitivity of ±0.70 dB.

Fast Acting Over-molded Fuses: SKY87604 Fast Acting Over-molded Fuses: SKY87604

The SKY87604 is an over-molded fuse designed to prevent contact between the metallic material and the body of the fuse while maintaining the minimum clearance regulated by UL. This fast acting fuse enables high inrush current withstanding capability, and provides sufficient clearance from external metallic material in a space-saving 3.0mm x 3.0mm, 4-lead MCM, lead-free package.

Industry’s Smallest EMI Feedthru Filter Industry’s Smallest EMI Feedthru Filter

Design engineers are constantly trying to minimize space in creating smaller more efficient products.  Corry Micronics’ new Micro Spanner EMI Filter matches the smallest size chassis-mounted feedthrough the industry has ever seen.  The FT40 spanner bushing filter offers a miniature diameter of 0.071”and is the optimal form factor for designs that demand efficiency in a compact footprint.  Corry’s Micro Spanner is offered in a “C” filter configuration and provides capacitance from 10 pF to 5000 pF. 

Passive Splitters/Combiners Passive Splitters/Combiners

ETL offers a variety of 2, 3, 4, 8, and 16-way splitters/combiners operating in the L-band (850-2150 MHz). They’re ideal for applications involving telecom infrastructures, satellite systems, microwave links, test and instrumentation, military communications, and radar networks. Types include DC and 10 MHz pass on all ports, DC and 10 MHz block on all ports, and DC and 10 MHz pass on port 1 to Common & Blocked on the rest. For information on the individual model’s specifications and RF performance in the L-band, download the available datasheets.

Diplexers/Multiplexers with Reduced Prototyping Diplexers/Multiplexers with Reduced Prototyping

Diplexers and multiplexers are used to either separate or combine two different frequencies that are similar in range to one another. While bandpass filters can also be used to combine and separate signals, they’re only ideal for use with frequencies that are far apart from one another.

High Power Limiters For Defense And Security Applications High Power Limiters For Defense And Security Applications

HUBER+SUHNER high power limiters are designed as integral security systems for sensitive receivers to protect against front door coupler high power electromagnetic energy such as HPM/HIRF, HEMP, and LEMP. With a low threshold level, a maximum input power of 25 W CW, and a 1 kW beam peak, these limiters are ideal for radar signals environments on board naval vessels.

180° Hybrid Coupler: AH180-020180 180° Hybrid Coupler: AH180-020180

The AH180-020180 from AtlanTecRF is a stripline hybrid coupler covering the 2 – 18 GHz frequency range. It provides 180 degree phase shift, and in-phase outputs from two combined signals with a maximum amplitude unbalance of ± 1.2 dB, and maximum phase unbalance of 12 degrees.

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