Effective radiated power

== Relation to transmitter output power ==
The transmitter is usually connected to the antenna through a [[transmission line]] and [[impedance matching|impedance matching network]]. Since these components may have significant losses <math>L</math>, the power applied to the antenna is usually less than the output power of the transmitter <math>P_\text{TX}</math>.  The relation of ERP and EIRP to [[transmitter power output|transmitter output power]] is
<math display="block">\mathrm{EIRP(dBW)} =  P_\text{TX}\mathrm{(dBW)} - L\mathrm{(dB)} +  G\text{(dBi)}</math>
<math display="block">\mathrm{ERP(dBW)} =  P_\text{TX}\mathrm{(dBW)} - L\mathrm{(dB)} +  G\text{(dBi)} - 2.15</math>
Losses in the antenna itself are included in the gain.
Description	What you type	What you get
Italic	''Italic text''	Italic text
Bold	'''Bold text'''	Bold text
Bold & italic	'''''Bold & italic text'''''	*Bold & italic text*
Description	What you type	What you get
Reference	Page text.<ref>[https://www.example.org/ Link text], additional text.</ref>	Page text.^[1]
Named reference	Page text.<ref name="test">[https://www.example.org/ Link text]</ref>	Page text.^[2]
Additional use of the same reference	Page text.<ref name="test" />	Page text.^[2]
Display references	<references />	↑ Link text, additional text. ↑ Link text