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Hello
Here is a sample of mixer IC's.
1)why is RF output frequency lower than Lo?
2)does it appear sum and difference of LO and IF signal?
3)what parameters increase price of mixer IC's?
Hello
Where Can I found a chart or table that shows common quality factors value for some resonators such as SAW BAW STW Quratz crystal and Quratz BAW?
Re: simplest way to have a ethernet on ARM with keil
Thank you for you suggestion
As I download st "LwIP TCP/IP stack demonstration " I can't find Lwip stack and library files for smt32fxx as it mentioned...
simplest way to have a ethernet on ARM with keil
Hello
what is the easiest way to configure ARM with keil function as ethernet controler (with PHY)?
I see different code but most of them make it's program complex. I need to config my ARM(smt32f10x) as a Server to receive and transmit some data...
VSWR(measured by Input impedance) and S11 is different
Hello
I designed a simple corner reflector with HFSS and I set terminal impedance to 75 ohm.Here is my Hfss output S11 and input impedance of my antenna.
(So at F=8 Gighz we have S11=Gama=10^(-10.7358/20)=.2905
(as you see at the F=8Ghz...
Hello
Here is my design
and this is it's radiation pattern
but I want to have a backfire antenna.I use this diagram(but my helix wire diameter is 1.7mm instead of 1.5mm)
Practical sample:
how can I improve my design to have a backfire and good gain?
Hello
here is another problem
both of them have the same material but I want to have a good connection between two pec object (as you see in QFH antenna
) but it seems they cause "intersect " error. how can I model this junction without any error?
Hello
"
The profile cannot be swept, because it has multiple lumps. Only single lump profiles can be swept. (4:36:46 PM Feb 22, 2016) [error] Body could not be created for part Bend1 because of invalid parameters of this part or some of its parent part/coordinate system."
what is my...
Hello
I want to bend my helix to have a intersect between rod and my helix shape.how can I do it without any discontinuity appear.
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I draw a bend but It has some problems
as you see it doesn't have a flat surface to connect helix to rod and here I want to connect both...
Hello
how to define and set name of each surface of an object in HFSS?because I need this option to use drawing sweep
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Hello
I test this way but I can't set a name.
here is my shape
when I select the object and modeler->surface->section and select XZ plane it select two...
Thanks you PlanarMetamaterials
what do you mean about "t's a bit hard to gauge performance by direct observation of (the magnitude of) input impedance"?
because as I know we can treat identical to Input impedance and S parameters and both of them can give us input impedance but in real sometimes...
Thank you
So for a helical antenna with axial mode this input impedance is acceptable for a range of frequencies?because in a reference it mentioned that helical antenna input impedance is approximately between 150-300 ohm
Hello
How can find SLL(side lobe level) ratio? because as I check different part of far filed parameters I see we don't any any function for SLL or I didn't see that
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