Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Amplifier Solutions Corporation (ASC) - RF Cafe

to measure nanohenry inductors - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

 Post subject: to measure nanohenry inductors
Posted: Wed Apr 02, 2008 6:15 am 

Joined: Wed Apr 02, 2008 5:55 am

Posts: 1

Location: pune,india


I have designed LNA for 1420MHz by tunning microstrip lengths and inductors in GENESYS.

These inductors are in nanohenry(values are:16,24,390,58) and made by wounding copper wire on former.

Can u suggest me a practical method to measure these inducors since i don't have any LCR or Qmeter in nanohenry range.It's really urgent.

Thanking you,


 Post subject:
Posted: Mon Apr 14, 2008 11:11 am 
User avatar

Joined: Fri Feb 17, 2006 12:07 pm

Posts: 304

Location: London UK

There are ways.

Do you have a signal generator, and maybe a scanning receiver covering VHF?

If you can arrange to create a series tuned circuit using accurate close % tolerance capacitors, then if you feed the generator into the series circuit across the series-connected L and C, a receiver connected across the circuit will produce a minimum signal as it is almost a short circuit across the 50 ohms.

Since you know the C value accurately and the L value approximately, this narrows the search range down to a few MHz on the receiver. Then when you know F very precisely, you can correct the L value using the well-known resonance formula.

Hope that helps.

 Post subject:
Posted: Wed May 14, 2008 3:08 pm 
Yes, a series LC circuit will provide you an easy way to meas the L. Just be careful to have a well known C (with low tolerance), place the L an the C as close as you can to each other, and be sure to place them into a line with the correct characteristic impedance.

And if you want to be more accurate, once you have a first approach to the L value, reselect the C in order to have the resonance infrequency around the frequency you will be using the L (1420MHz), remember that L value also is function of the frequency.

Good luck! (www.viewrd.com.ar)

Posted  11/12/2012

Exodus Advanced Communications Best in Class RF Amplifier SSPAs - RF Cafe
ConductRF Phased Matched RF Cables - RF Cafe
Berkeley Nucleonics Vector Signal Generators Radar Simulations - RF Cafe
Anatech Electronics RF Microwave Filters - RF Cafe
Lotus Communication Systems Modular RF Component Building Blocks - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free


About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: