Empower RF Systems, Inc.

Phone Number +1(310)412-8100

Quote Cart Quote Cart Customer Login Login
Menu
Open Menu
Search
RF Amplifiers Search
Search for Amplifier by Parameter

MHz

MHz

Watts

Search for Amplifier by Part

Enter Empower SKU number

(for example: 1094)

Quick Qute @ Signup

    Home

    Products

  1. All RF and Microwave Amplifiers
  2. Air Cooled Next Gen Amplifiers
  3. Liquid Cooled Scalable Amplifiers
  4. Pulse Amplifiers
  5. RF and Microwave Modules
  6. Modules - Purchase from Stock
  7. Rentals
  8. Custom Design Request

    Markets

  1. EW
  2. Radar
  3. Satcom
  4. Communications
  5. Test & Measurement

    Knowledge Center

  1. Catalogs & Brochures
  2. Press Releases
  3. White Papers
  4. Advertisements
  5. Trade Shows
  6. Videos

    Company

  1. About Empower
  2. Sales Representatives US
  3. Sales Representatives Worldwide
  4. ISO Certified
  5. Career Opportunities

    Support

  1. Contact Us
  2. Customer Service

Engineering Notes


RF POWER AMPLIFIERS TECHNICAL REFERENCE MATERIAL


Gain, dB Gain Calculator


Normaly expressed in decibels, dB
Power Gain (dB) = 10 Log 10 (RF Output Power / RF Input Power)

Gain is defined as the ratio of the output power to the input power in dB. Assume that the input power is 10 mW (+10 dBm) and the output power is 1 W (1000 mW, +30 dBm). The ratio will be 1000/10 = 100, and the gain will be 10 * log 100 = 20 dB.

It is much easier to calculate gain by converting the power to dBm first, so the gain of the above amplifier will be 30-10 = 20 dB. A simple reduction will reveal the gain. In tradition, all power is read in dBm and the gain is in dB.

Example:

A low noise amp (30 dB gain) cascades with a driver amp (20 dB gain) and a power amp (10 dB gain). The total gain will be 30+20+10 = 60 dB.

Frequently Used
Decibel Conversions
dB Power Ratio
O
1 (-1)
3 (-3)
6 (-6)
10 (-10)
13
17
20
30
1
1.26 (0.8)
2 (1/2)
4 (1/4)
10 (0.1)
20
50
100
1000

Gain Calculator

Enter RF Input Power:     W

Enter RF Output Power: W

Gain = dB