Radiated Power Measurement - Revision history

Carlb: /* Power Ratio dBm or dBmW */

2009-04-09T01:18:16Z

Power Ratio dBm or dBmW

← Older revision		Revision as of 18:18, 8 April 2009
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	more information can be found [http://en.wikipedia.org/wiki/DBm here]		more information can be found [http://en.wikipedia.org/wiki/DBm here]


			{{electronics}}

TimVK4YEH at 23:18, 4 April 2009

2009-04-04T23:18:59Z

← Older revision		Revision as of 16:18, 4 April 2009
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	Related wiki page: [[Feedlines]], [[Capacity Hats]], [[Antenna Design]], [[Gain]], [[Bands]], [[SWR]], [[harmonics]], [[Front-to-back ratio]] [[Electromagnetic Waves]]		Related wiki page: [[Feedlines]], [[Capacity Hats]], [[Decibels]], [[Antenna Design]], [[Gain]], [[Bands]], [[SWR]], [[harmonics]], [[Front-to-back ratio]] [[Electromagnetic Waves]]

	==Power Ratio dBm or dBmW ==		==Power Ratio dBm or dBmW ==

TimVK4YEH: /* Power Ratio dBm or dBmW */

2009-04-04T23:18:22Z

Power Ratio dBm or dBmW

← Older revision		Revision as of 16:18, 4 April 2009
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	==Power Ratio dBm or dBmW ==		==Power Ratio dBm or dBmW ==

	The power compared to a 1 milliwatt (1mW) source, expressed in decibels (dB)		The power compared to a 1 milliwatt (1mW) source, expressed in decibels ([[Decibels\| dB]])

	Formula:		Formula:

TimVK4YEH: New page: Related wiki page: Feedlines, Capacity Hats, Antenna Design, Gain, Bands, SWR, harmonics, Front-to-back ratio Electromagnetic Waves ==Power Ratio dBm o...

2009-01-22T09:20:20Z

New page: Related wiki page: Feedlines, Capacity Hats, Antenna Design, Gain, Bands, SWR, harmonics, Front-to-back ratio Electromagnetic Waves ==Power Ratio dBm o...

New page

Related wiki page: [[Feedlines]], [[Capacity Hats]], [[Antenna Design]], [[Gain]], [[Bands]], [[SWR]], [[harmonics]], [[Front-to-back ratio]] [[Electromagnetic Waves]]

==Power Ratio dBm or dBmW ==

The power compared to a 1 milliwatt (1mW) source, expressed in decibels (dB)

Formula:

<math>
x = 10 \log_{10}(P/1 \ \mathrm{mW}) \,
</math>

Where P is the power in watts (W)

This roughly equates to:
*Double the power = 3dB increase in dBm
*Halve the power = 3dB decrease in dBm

{| class="wikitable" style="text-align: right;"
!dBm level !! Power
|-
|80 dBm || 100 kW
|-
|60 dBm || 1 kW = 1000 W
|-
|50 dBm || 100 W
|-
|40 dBm || 10 W
|-
|36 dBm || 4 W
|-
|33 dBm || 2 W
|-
|30 dBm || 1 W = 1000 mW
|-
|27 dBm || 500 mW
|-
|26 dBm || 400 mW
|-
|25 dBm || 316 mW
|-
|24 dBm || 250 mW
|-
|23 dBm || 200 mW
|-
|22 dBm || 160 mW
|-
|21 dBm || 125 mW
|-
|20 dBm || 100 mW
|-
|15 dBm || 32 mW
|-
|10 dBm || 10 mW
|-
| 6 dBm || 4.0 mW
|-
| 5 dBm || 3.2 mW
|-
| 4 dBm || 2.5 mW
|-
| 3 dBm || 2.0 mW
|-
| 2 dBm || 1.6 mW
|-
| 1 dBm || 1.3 mW
|-
| 0 dBm || 1.0 mW = 1000 µW
|-
| −1 dBm || 794 µW
|-
| −3 dBm || 501 µW
|-
| −5 dBm || 316 µW
|-
| −10 dBm || 100 µW
|-
| −20 dBm || 10 µW
|-
| −30 dBm || 1.0 µW = 1000 nW
|-
| −40 dBm || 100 nW
|-
| −50 dBm || 10 nW
|-
| −60 dBm || 1.0 nW = 1000 pW
|-
| −70 dBm || 100 pW
|-
| −80 dBm || 10 pW
|-
| −100 dBm || 0.1 pW
|-
| −111 dBm || 0.008 pW = 8 fW
|-
| −127.5 dBm || 0.178 fW = 178 aW
|-
| −174 dBm || 0.004 aW
|-
| −192.5 dBm || 0.00004 aW
|-
| −∞ dBm || 0 W
|}

more information can be found [http://en.wikipedia.org/wiki/DBm here]