23 Apr 2018

Non-magnetic variable inductors combine small size with high performance

These Johanson Manufacturing branded Variable Inductors, from Knowles Precision Devices, combine small size and high performance with non-magnetic properties. Inductors and variable inductors are necessary elements of many RF products. They are used for matching and loading low noise amplifiers, power amplifiers and mixers, as well as for providing frequency- selective resonant circuits in variable-frequency oscillators.

With an overall height of only 9mm/0.35" in SMD, vertical SMD and thru-hole versions, they are ideal for applications consistent with MRI/NMR Systems, Radios/Jammers, Power Amplifiers, Radar, Avionics Instrumentation and Test Equipment. Applications where higher power handling & high Q values are essential.

The coils and PTFE cores have a patented precision machined design to guarantee a constant winding pitch and consistent relationship to the printed circuit board. Tuning is done by means of threaded PTFE and Non-Magnetic Copper Alloy core. They have superb shock, vibration and thermal tolerances and operate over the temperature band -40oc to +85oc. Catalog parts have nominal values of 33 to 118nH, 2 to 7 turns with Q as high at 121 : 100MHz, SRF 0.7 – 1.2GHz with customized versions available for non-cataloged values. All parts are RoHs compliant.

Johanson Manufacturing is a supplier of trimmer capacitors, non-magnetic variable inductors and microwave tuning elements.

Most popular news in Electronics components

Infineon and JD join efforts to build smart IoT ecosystem
Innovative connectors for rail
"Clock Tree on a Chip” offers innovative multi-profile support
KSC PF switch offers reliable, water-resilient, potting-friendly solution
Automotive grade quad 1A step-down regulators reduces footprint

All news in this channel | All news


Share this page


Want more like this? Register for our newsletter






Clarifying Machine Vision with High Quality Sensors Mark Patrick | Mouser Electronics
Clarifying Machine Vision with High Quality Sensors
Automated imaging technology is everywhere we look. As cameras and their processing units get ever smaller, they are moving into ever more industries - from speed cameras and factory production lines to diagnostic medicine. For many of these applications, image quality is critical - but what does image quality really mean? Different applications will require quite distinct performance characteristics. Understanding camera specifications, differences between CCD and CMOS sensors, and features such as real-time processing or near-infrared (NIR) can help guide the camera selection process to produce better imaging results.









Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy