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 RF Cafe Forums 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 RF Superstore 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!
Innovative Power Products Couplers

Troubleshooting The example Mixer Project - 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.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

dstraight

Post subject: Troubleshooting The example Mixer Project Posted: Thu Oct 06, 2005 4:22 pm

Captain

Joined: Sun May 09, 2004 1:23 am

Posts: 10

Location: Morgan Hill, CA (Silicon Valley, Bay Area)

Okay, I decided to drive home for lunch so that I could gather a few screen captures (I am lucky in that I live and work in the same town).

Below is a schematic of the example design (SweptRF.dsn) from the Mixers_prj project and below this we see graphs of the resultant simulation.

As stated in my last post I've only added one net at the LO port of the mixer and named it "VLO" then I produced a plot of the VLO and Vrf (verses swept RF frequency, Frf) as shown in the graphs below. The third screen capture shows the most detail.

As can be seen from these graphs the project appears to be running correctly, but when I try to look at the signals going into the mixer I do not see anything that would make sense. In the graphs RF power should say -20dBm at 1GHz and LO power should read -5dBm at 1GHz-70MHz= 930MHz, but as the two graphs show LO power is below -50dBm and RF power is below -60dBm.

Perhaps the graphs that I have drawn take frequency samples that do not sample exactly at 1GHz and 930MHz thus explaining absence of power. I do not know.

Top

dstraight

Post subject: Posted: Thu Oct 06, 2005 4:25 pm

Captain

Joined: Sun May 09, 2004 1:23 am

Posts: 10

Location: Morgan Hill, CA (Silicon Valley, Bay Area)

Opps! I screwed up. This posting was supposed to go under "ADS using Harmonic Balance with mixers," but I've created a new post by mistake.

If anyone can move this message for me (or delete it so that I can repost in the correct area) I'd appreciate it.

Posted  11/12/2012

Exodus Advanced Communications Best in Class RF Amplifier SSPAs
Exodus Advanced Communications Best in Class RF Amplifier SSPAs
RIGOL Technologies (test equipment) - RF Cafe
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe
RF Superstore (RF Components) - 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

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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:

AirplanesAndRockets.com