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I'm designing a truncated corner antenna with only one feed and circularly polarized in HFSS. But i haven't got good good bandwidth and the VSWR isn´t in the same frecuency exacticly. I've heard i can improve the bandwidth using a biger thickness or increasing the dielectric constant value, is...
perfect h boundary
Hey i have similars problems simulating a patch antenna, Is the vacuum coax the dielectric in this case? If you put other dielectric what happend with the ground, a coaxial cable supposed to have the ground in the outer.
Thanks in advance.
I have a problem with the mesh too, i have tried to change the number of passes and then the central frecuency of my simulation was changed I don`t know what to do for adjust the number of max passes
measuring capacitance and the dielectric constant
Thank you for you answer,
Once, i heard about a device that measure capacitance called qmeter but i `ve never used that device.
Finally, i will try to make two microstrip line and measure the phase difference and then to obtain the effective...
capacitance of a dielectric
I'm working on a pcb substrate and i need to know the properties like the characterisctic impedance and the dielectric constatnt the material is FR4 two copper layer.
Is there any instrument to measure the capacitance?
Can i measure that with a network analyzer with...
fr4 impedance
That 's Right , I was thinking in a trace etched on the PCB material, but i don`t know if there is a formula for the theoretic characteristic impedance like the
Microstrip Transmission Line Characteristic Impedance.
regards
fr4 impedance per cm
Hello Friends,
I 'm trying to find the impedance of a rectangular 10*1 cm^2 of a pcb FR4
two layer copper 0.025mm per layer and h=1.55mm
I tried to measure but that was not satisfactory and i 'm trying to
compare measuring the impedance and then I will find the dielectric...
measuring er pcb
I tried to measure the dielectric constant of FR4 with VNA and a piece of dilectric measuring resonance across the following formula:
fmn^2=c^2/er *((n/2L)^2 + (m/2W)^2)
I measured the resonance frecuencies but i don´t know how I get the
integer values of m y n, because I...
Right adel_48
I've got good axial ratio, but the reflection coeficient s11 is bad, and central frecuency is 2.45.
the axial ratio is 1.04 and the s11 in 2.4 GHz is -8.5 dB , Is the reflection coeficient s11 acceptable, isn´t it?
Added after 1 minutes:
I'm new this is my first design
Thank you for your help
You answer me the firt question
also I need to know the polarization ratio for
predominantly RHCP |ER/EL| I saw that in
but i mn't really convinced
regards
HFSS Mesh3d errors
I've hat the same problem , but I checked and was the port location in z direction when I made the manual example.
Added after 1 minutes:
I think isnot a version problem , beacuse a I 've worked fine so far with v10 and v9.2
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