High power amplifier energy consumption in payload or BTS

[jayce3390]

Hi,

Do you have any idea or picture showing the power consumption part of the PA in the whole transmitter ?

Thank you

 

[Element_115]

Re: High power amplifier energy consumption in payload or BT

Not sure what you are asking, but are you talking about the DC Current&Voltage?
(V*I= Power). Or do you mean the Power efficiency of the PA ?

You can measure the DC power in to the PA then Measure the RF Power
(w/ a Power meter), convert the RF dBm power to Watts and divide those
numbers to see how much DC PWR is going to RF PWR.

Say you have 10V @ 1A in to a PA, and the PA puts out 30dBm! Then you convert
dBm to watts--> 30dBm = 1W
10V*1A=10W


PAE= Pout/Pin = 1/10 = 10% officiant.

(P.S. These numbers were chosen for easy math)

 

[jayce3390]

Re: High power amplifier energy consumption in payload or BT

thank you for your reply but I need a general information from users of transmitters not equations.

I would like to know the power consumption of the PA in a BS transmitter for exemple, I mean approximately... 20% or 40% or more?

It's for my report, to assess the energy cost contribution of the PA.

 

[karesz]

Hi jayce3390,
The spectrum of possible PA versions & configurations is too wide_if you will hear over 20 to 40% , then its maybe nothig for you, but otherside is with your specification for us very similar:-(!...
I mean: sorry, but not enough...
K.

 

[jayce3390]

Re: High power amplifier energy consumption in payload or BT

 

[totowo]

Re: High power amplifier energy consumption in payload or BT

The key questions are:
1. How many power do you want to be sent to antenna?
20dBm?30dBm?40dBm?

2. your modulation scheme?
constant envelope modulation(MSK/FSK etc.) or linear modulation(BPSK/QPSK or even OFDM and so on)
The former one may need higher effciency but the later one need lower(or even much lower) effciency

2. The process.
GaAs/SiGe/CMOS/LDMOS? or use stand-alone commercial PA?


you must figure them out.

 

[karesz]

Hi jayce3390,
I think their are the DC pwr data of your stages, am I right?
K.

 

[jayce3390]

Re: High power amplifier energy consumption in payload or BT

this is kind of what I was looking for. I found it in a publication. Not my transmitter.