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You should understand that in the real world there should be a 0402 or a 0603 two square pads for the resistor, so that the RLC boundry condition should be placed in between these two pads on a surface connecting both ends.
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Very interesting indeed. If you have more results, please update. I'd be very grateful if you can send your comparison anyhow. Did you check the TRP results, or did you use coax launching which is more prone to error?
"Wheeler's cap method" - didn't hear about it. I'll learn about it. There is a small test equipment also provided by EMSCAN called RFX/RFX2 for efficiency and radiation pattern. it does a near field to far field transformation.
Hi,
I simulates a simple printed Inverted -F antenna at a frequency of 1.9 GHz using HFSS. I also measured the antenna in an anechic chamber.
The problem is that I get a large difference between simulated and measured results. While measured results show antenna efficiency of about 66%...
I think that the most important point is the phase noise reduction of fractional N synthesizers. This is because channel spacing can now be short without the need to increase the N counter. For these reaseon the phase noise which is proportional to 20*LOG(N) can now be reduced with the ability...
Yes, lumped port can still tell you the impedance on condition that you put the same impedance as the charecteristic impedance of the lines at the load.
Nevertheless, you should use waveports and let HFSS solve for the port impedance. Try to find some documentation or posts referring to...
The impedance you see, is the transformed impedance from the end of the two lines to their begining. It is not the charecteristic impedance of the lines. You should use waveports and not lumped ports in your design.
Regards,
Y.A.
What you realy see is the differential input impedance of the 2 wires. these impedance is not the charecteristic impedance of the lines.
In short, you should use waveport and solve for the fields in the port. The solution of the ports give the charecteristic impedance of the lines solved by HFSS.
I think you should try using constant current which in turn gives constant magnetic field in the wave equations derived from Maxwell's equations. Maxwell's mequations use the dB/dt term which requires a changing B field.
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