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Hi,
When u operate GSM PA in saturation mode, it bound to have harmonics , since its operating in saturation(means u are starting to clip waveform in time domin). The generate harmonics may create problem to other devices which are operating at that frequency.
Regarding ACPR, when u...
Hi,
Results with schmetic design and ideal component is totally different from practical results. You can use S2P file for replacing capacitor and inductor. S2p files are available on vendor website like ATC, DLI.
1. Design your layout as per vendor .dxf file data.
2. perform uw/Mom...
Re: Can I get the opt load of a LDMOS ,Only with a s2p file?
No, you can't obtain optium load using simulation without non-linear model because S2P has only linear parameters information only.
We do measure the P1 db and 3-db back for power amplifier. I am confused regarding 3-dB back off measurement. Is it 3-dB back off from output power or is it from input power, from P1-dB point ?
thanks.
What are the settings need to make to measure ACP (adjacent channel power) using agilent E4440A spectrum analyzer and using agilent E4438C signal generator ?
Hi,
Can anyone tell me that which book is best for practical designing of power splitter/combiner at high frequency(1.8 GHz) with high handling power capacity (50 watts ) ?
Thanks
hw to introduce phase distortion in the Rf signal ?
Actually, i want to measure EVM introduce by my Power Amplifier. i have tried by driving my PA into compressing region but its Rms EVM value is 0.5% only.
so, i think there is some problem in measuring so i want to introduce Phase distortion...
shift problem
I have designed RF PA in ADS 2008 version. i made three different design for 1.8425 Ghz frequency. but after making PCB, i have observed shift of 50 MHz in all three designs.
What could cause such problem, is it due to ADS ?
Plz help me, i can't able to locate cause problem...
rf power transistor zout
How to calculate Zout of Power Transistor if S parameter of the transistor is given, and its need to match to 50 oham line, no other information is given ?
Thanks.
-3db frequency
For amplifier, u can consider as the frequency at which gain is reduced by 0.707 of its maximum value.
in terms of power its half of maximum value i.e 3db down from maximum value.
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