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Hi vfone,
In the document you have attached there are the following figures:
Fig 1.
Fig 2.
In the fig. 1, the phase noise of multipliers D2 and D3 are also taken into account in calculation of overall phase noise but in fig. 2 they are not incorporated. Can you elaborate at this point?
HI vfone,
Generally in RADAR systems, various LO signals are locked with a single OCXO i.e. their phase noises are correlated. So how the statement "uncorrelated noise sources (with similar phase noise) at the input of the mixer, gives lower phase noise at the output of the mixer than...
Hello All,
What is the difference between correlated and uncorrelated phase noise? How to calculate phase noise at the output of a mixer when the phase noise of the input signals are specified for the following cases:
Case (A) Mixer is operating as downconverter:(Output frequency = RF...
Hi,
Apart from fixing with screws, what are the other ways to attach RF PCBs (e.g. RT duriod 5880) into a aluminum box for creating an RF module?
Regards,
akrcal
Dear G4BCH,
Thanks for your reply.
You have mentioned the following:
"You could use the AGC voltage as an indication of the noise figure if it has to be enabled all the time. This does make the assumption that the gain of the receiver is stable enough".
Can you elaborate this point a bit...
Hello All,
I have two questions:
(a) What is delayed AGC and how it is diffferent from simple AGC. What kind of AGC is generally used in BPSK/QPSK RF receivers. Simple AGC or delayed? I need some good reference material or schematic diagram of Delayed AGC circuit.
(b) While measuring Noise...
Hello Jiri,
I am also designing mixers but at 30GHz. can you give some idea about the DC biased mixer which uses 0-3 dBm LO power. What is the configuration of the mixer? Is it waveguide based or planar?
Regards,
akr
Hello,
When the Zo is lower then the tolerances of the line length becomes less critical. It happens because due to the formula Zo*j*tan(BL). So for large Zo the value of the expression will vary more with respect to the line length
cheers.
akr
how to simulate lumped elements in mwo
Hi Dr. Rautio,
I use sonnet lite for microwave planar designs. I have seen some of the papers of yours regarding co-calibrated ports. May you send these papers to me.
Deembedding the effect of a local ground plane in electromagnetic analysis
Rautio...
In power amplifier simulation you use large signal s-parameter simulation which is same as harmonic balance simulation to calculate port VSWR.
Akrcal
:D
mixer if impedance
Hello,
I want to measure IF impedance of a mixer looking into the IF port. Is there any way to do that with the help of Vector network analyzer or impedance analyzer?
Regards,
Acla
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