Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums RF Cafe Homepage Thank you for visiting RF Cafe!

Mini-Circuits Coaxial Amplifiers Supply Voltage? - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement

Post subject: Mini-Circuits Coaxial Amplifiers Supply Voltage? Posted: Fri Jul 17, 2009 5:46 pm


Joined: Fri Jul 17, 2009 5:42 pm
Posts: 2
How critical is the supply voltage (15VDC or 24VDC) on Mini-circuits 50 Ohm Coaxial amplifiers?

say -

5 to 500MHz
10 to 1000MHz
10 to 2500MHz

Mini-circuits can't give me a spec they just say - "any well-regulated low-noise power supply". The Project Manager/Scientist where I work wants me to spec something to power these that has the same specs as Laboratory bench top grade variable power supplies with line and load regulation <0.01% of maximum output and ripple and noise <10mV P-P (constant voltage mode). But I'm not so sure if they have to be that good?

Part #'s




Post subject: Re: Mini-Circuits Coaxial Amplifiers Supply Voltage?Posted: Sun Jul 19, 2009 2:52 pm

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany

There is a good applicaiton note provided by Minicircuits regarding the bias requirements for amplfieirs, although this document applies to IC's (MMICs), it would also be relevant for coaxial amps.

In general, for RF amplifiers it is important to provide a low noise supply voltage, as any noise on the supply voltage can be easily coupled to the RF signal.

for a 15VDC and above supply <10mVPtP ripple and noise requirement is not easy to achieve.

A good design practice is to use:

1. Low-noise LDO with several bypass capacitors (having different values).

2. RFC (RF Choke) connected between the RF output of the amp to the supply. Its value should give several hundreds of ohms at the lowest frequency of operation.

Important: The SRF should be higher than the highest frequency of operation.

3. You can also use Ferrite Bead connected between the supply voltage and the bypass capacitors. It will help to absorb and reduce radiated and conducted noise. It is important to choose the right one in terms of frequency range and impedance.

Best regards,

- IR


Post subject: Re: Mini-Circuits Coaxial Amplifiers Supply Voltage?Posted: Wed Aug 05, 2009 11:35 pm


Joined: Wed Aug 05, 2009 11:33 pm
Posts: 1
Thanks for sharing this useful information. It's great.

plan solution commission de surendettement - commission de surendettement, vous pouvez demander un dossier de surendettement.plan solution commission de surendettement


Post subject: Re: Mini-Circuits Coaxial Amplifiers Supply Voltage?Posted: Wed Aug 12, 2009 11:28 am


Joined: Fri Jul 17, 2009 5:42 pm
Posts: 2

Thanks for the reply and for the information, it was very helpful.


Posted  11/12/2012

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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:

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !