Windfreak Technologies
LadyBug Technologies LB479A RF Power Sensor - RF Cafe
 

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

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 App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Innovative Power Products Resistors

please reply---output match in PA - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 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. If the folks at phpBB would release a version with integrated sign-in from the major social media platforms, I would resurrect the RF Cafe Forums, but until then it is probably not worth the effort. 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

kris
Post subject: please reply---output match in PA Posted: Sun Jan 08, 2006 2:22 am
i know i've been asking a few questions and i really appreciate all the answer....i'm a student learning and i've one more question to ask.

i did loadpull analysis and i found out that I need a load of X+jY. so what i did i just transformed a 50 ohm load to X+jY using the matching utility in ADS and it seemed to work. now when i put it in the circuit it doesn't match all that well. when i am running s-param simulation i terminate in 50 ohms since i'm transforming 50 ohms to X+jY, right? if not please explain how a match can be verified for optimal load match? Just wanted to make sure. the thing that is confusing me is that the output is taken from the collector and there is a certain output impedance....if you were doing the usual conjugate match then it is clear to me but here it's not conjugate match but instead the transistor needs to see a certain load (X+jY) and i do that by transforming 50 ohms to this X+jY value...because of this i don't understand what the output reflection coefficient is calculating or reprsenting?? the thing is if i try to tune the components of output match in ADS then this would eventually lead to "conjugate match" and not a match to X+jY because as I said the output is connected to collector and after a matching network is terminated in 50 Ohms.

also the way i did output match was to take the X+jY impedance and then do the usual standard method of matching 50 ohms to X+jY...this is how you do it, right? please reply, your help will be very much required




Posted  11/12/2012
PCB Directory (Manufacturers)
Amplifier Solutions Corporation (ASC) - RF Cafe
 

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

These Are Available for Free