Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
RF budget analysis usually be taken as link budget for a RF system, transmit or receive. Only by this kind of theory planning, will the component selection or testing be more systemwise and efficiently. For example, you can get cascaded noise figure by individual component NF then put it into your system calculation to see if the resulting NF meeting you specification or not.
Another kind of budget analysis would be informal stuff more like "real time" style, which means you should be able to think thoroughly your requirement for any measurement item you take, and thus the margin would be gained by your knowhow or even experience by another origin, DON'T dig into the hole without systemwise view when you being exhaueted in bug solving.
Actually, there are two RF budget analsis:
a) RF "link" budget and
b) RF chain budget.
In a) the intention is to design a link which comply with
the specifications. That is, design for a maximum error
at the maximum distance. It is done based on "average"
received power. It takes values as transmitter output power
(Po), Antennas Gains(Transmitting and receiving), Receiver
sensitivity and characteristics of the channel(Rayleigh, Rice,
Log-Normal, Nakagami, etc). The link budget add or substract
the values (Po, Gr, Gt, Free Space Loss, Fading, etc) and check
if the sensitivity (or S/N) is accomplished.
If not, the designer must increase the gain or power or decrease
the distance.
In b) the intention is almost the same. For a given minimum
power at the input of the receiver the designer should check
if the receiver has the maximum error allowed. It takes values
as Gain, Losses, Noise Figure and Distortion along the receiver
chain to calculate the sensitivity(or the minimum S/N). The goal
here is minimize the sensitivity( ex. -80 dBm) at the maximum
error allowed (ex. 10^-3)
In a) the analisys is external to the receiver and in b) the analysis
is basically internal to the receiver.
Also you can find a nice articles @ following links
1. Latest Version of Applied Wave Delivers Unique New Technology for RF Budget Analysis
**broken link removed**
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
