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matlab lna
Hello to all
I am to modellizate a RF LNA in matlab, but I have a problem with the noise figure model. To model it I defined the variance of the white gaussian noise as:
4*k*T*R*(NF-1)*fs
where NF is the lineare noise factor and the fs is the frequency simulation. I multiplied this...
chipcon cc1101
I am looking for information (bit, ENOB and so on) about the ADC that convert the analog signal in the receiver part of the CC1101. I tried in the network and TI sie but without success: someone can help me?
Regards
If you want to design a Yagi antenna you will work under 1 GHz frequenzy and you want a very directional antenna. I will use HFSS to simulate this type of antenna.
By
Certainly the effect of this simple wire with no screen/shield deeply impact the matching condition: you need to have a 50 phm cable/wire to connect the antenna to the receiver. Regarding your question regarding the possibility to "become a part of antenna" it's depend on the type the antenna to...
Re: Job information
Hello Suresh
my current country is Italy, and I don't have a valid visa already. Is it difficult to try job in USA in this condition?
By
I am a RF IC validation and application engineer with 8 years of experience. I worked in the validation and application of RF radio (XMRadio), GPS, W-CDMA devices, DVB-H and research projects. I am looking for a job in the USA, California it is better. Can someone help me show the company when I...
I forgot to inform you that when you perform the measurements with the two different mode you will try a difference of 3 dB (the method 1 is higher of 3 dB than the method 2). This is because the method 2 is a measurement that, for how is performed, don't consider the image frequency, because...
You can use two different method:
1) you can apply directly the definition of NF=(S/N)in/(S/N)out => -G -Ni + No
where G = gain, Ni = -174 dBm/Hz, No is the noise in the oputput measured with a spectrum in dBm/Hz.
2) you can use directly the Y-method. You can simply find it in Agilent...
Re: RF layout in ADS
maryam.ha81
the GNDvias in RF are very important. Consider that a via can be consider as an inductor in the RF frequency range, so you need to insert a lot of vias in order to reduce the inductor and the resistor serie value. It is better to put some vias nearly possible...
ckJJ
the sensitivity is the minimum signal input level that your receiver can receive with some characteristic (BER for example). Looking at the method to calculate this level we have:
Si = Ni + (C/N) + NF
Si = signal level at sensitivity
Ni = kTB (for a channel of 8 MHz = -105.16 dBm). You...
Re: IIP3 measurement
You need two signal generators and one spectrum analyzer. Connect the two generators input by a combiner to the LNA input. Send the two tones at, for example, 2.4GHz (f1) and 2.41 GHz (f2), same power, and see the signal at 2.39 GHz (2*f1-f2) and at 2.42 GHz (2*f2-f1)...
jeffreyedaboard
the S21 is a ratio of energy and not power. So if you are work in a matched world, the answer is yes, they are the same, but if you work in un-matched condition the answer is no, they are not the same.
By
Jim cage
what you say about the LO frequency vs. RF frequency is not always true. If you design an application with discrete components it is true, but if you works in an integrate chip it is better to work with LO > RF frequency. This why the VCO inductor is lower at higher frequency. In...
Re: Digital RF ?
The TI/DVB-H Hollywod device use a ZIF architecture to convert the RF data to DC. After there is a ADC to enter in the digital part. Seems that the device doesn't work well (CMOS technology, high fliker noise), so seems that TI will develope a DVB-H receiver with the RF part in...
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