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I have measured the same circuit and conversion loss is around 30 dB for x3. Only way to deal with this circuit is to obtain large signal model of HSMP 3822 from the manufacturer.
Re: In RFIC, spiral inductor behaves as capacitor at some hight frequency . Why so?
Due to parasitic effects on element, it behaves differently than expected. For inductor,due to parasitic capacitance between windings, coupling to ground and series resistance of the wire, circuit model is not a...
Have you checked resistive directional couplers? There is an example at https://en.wikipedia.org/wiki/Power_dividers_and_directional_couplers#/media/File:6_dB_resistive_bridge_hybrid.svg
However, its insertion loss is high. Hence, you should reduce the coupling below 30 dB..
If you know the admittance of the diode, you can put those values into MWO schematic and obtain the s-parameters. However, keep in mind that, with applied power/voltage C value can vary.
Yes, it should be terminated with a 50Ohm resistor with minimum parasitics. Output powers are correct, however you may experience loss due to microstrip lines.
You mean, LO is feed back to mixer IF port and reflected signal from mixer output is cancelled with LO leakage. Instead of directly summing at the coupler, I could not figure out why such a feed forward is applied.
In mixer circuits, it is not desirable to have reflections from output. Here, we...
Hi SunnySkyGuy,
Thanks for the answers.
I guess mixers on the feedback loop functions as a variable attenuator. Also, they can change the phase with 0/180 degrees. Hence, they can generate required feedback. Is it true?
I could not figure out what is meant by
“To minimize loss in this stage the...
Hi,
I have found a circuit for reducing the LO leakage of a mixer. Could you explain how this circuit works? Do you have alternative solutions to LO leakage reduction?
Kind Regards
usually high conductivity materials used for the antenna construction. hence current is confined to surface and skin depth is neglected. using the calculated current distribution you can find E and H fields
Hi Alex
while designing the switch we have considered also the switching time hence isolation of the single switch is around 20dB at 20 GHz. I also look at the datasheet in rec-usa... however RF characteristics are better than our design.
i have also tried the CST once, however it has some...
there are some works carried for wide band dpst. for the switches you can look
A DC to 100Ghz high performance ohmic shunt switch denis mercier
since your frequency start from dc you will need dc contact switch.
i have also some spdt work but frequency low(~20Gig)
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