Windfreak Technologies
Windfreak Technologies
 

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 Couplers

maximum power - 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

dipak
Post subject: maximum power Posted: Thu Dec 14, 2006 11:36 am

Captain

Joined: Tue Nov 14, 2006 7:21 pm
Posts: 9
Location: Nagpur(M.S)
can you tell me various design consideration for getting higher power for the power amplifier?

how should i increase the power of amplifier?


Top

IR
Post subject: Posted: Thu Dec 14, 2006 4:30 pm

Site Admin


Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany
One possibility to increase the output power is to match the power amplifier to maximal output power. You have to match the output to the conjugate of the output impedance. This however might come on the expense of other design paramaters like linearity or effieicncy.

You can do Load-Pull measurements. This can be done with a Tuner or by using a CAD tool e.g. ADS. The simulation results are countours of points on the Smith Chart, which correspond to different output power levels. This indicates to which impedance the output has to be matched in order to obtain a certain output power. You can also do paramater sweep: frequency, bias point to see how the output impedance changes and according to that to synthesize the required matching network. In ADS for example, you can get the contours for several paramaters like ACPR, IMD, output power etc, and you can design a matching network to a certain impedance which is a trade-off between several paramaters - the intersection of several countours.


Hope this helps!

_________________
Best regards,

- IR







Posted  11/12/2012
high frequency PCB of PCBONLINE
withwave microwave devices - RF Cafe
 

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

These Are Available for Free