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Andrew77
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Posts posted by Andrew77
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mmm
interesting, but seems lumped port, I don't understand well...
Do you have this example in .cst format?
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Sure,
The antenna is not matched..
Here is just to check the settings...
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I past it again...
Simulation are same as mine
Did you use Transient solver? if not what mesh?
Your bounding box how big is?
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Hi dear,how are you?
I made antenna by myself, I understand that corners must be rounded but I started with this version to have a simpler meshing...
The version with rounded corners gives me quite the same inductance (around 1.24 uH)
I'm looking for the examples inside CST (13.56 mhz coil ) but I have a big db file for examples in CST directory so I don't kown how access
Andrea
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Hello,
I'm trying to design a NFC antenna @13.56 MHz for a reader,
Antenna should have around 1,24 uH of inductance as simulation and calculation verified, but i'm not very sure about the set-up of CST (Frequency domain solver)
I don't see Self-inductance up to 60 MHz
I don't find The example given in the Examples of CST: "RFID Reader-Coil, 13.56 MHz CST example"
could someone upload? (CST 2019)
Many thanks
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OOK thanks!
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Ah!
OK, I thought the spiral worked as a choke only...
I will try
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yes
must be so, the coaxial cable is inside a pvc 25mm conduit tube, anyway its effects are very low
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dual-band-half-wave-flower-pot
The simpler version,
Looks like to have the higher gain @410 MHz VS 430 MHz
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Yes,
I fix it;
5,5M Meshcells, lot of time to simulate...
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ook thanks,
will CST simulate well a coaxial cable with transient analysis ?
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Hi!
this is the antenna,
http://vk2zoi.com/articles/dual-band-high-gain-flower-pot/
RG58, sleeve is a copper/aluminium or brass tube
How you would simulate the 7 turns of coaxial cable?
thanks
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In reality, before doing that, I would like to know if this antenna has a 3dB HPBW around 100° or maybe something wider beamwidth than a traditional helix...
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these are the best (to my opinion) AN for Helical antennas
HIGH GAIN AXIAL-MODE HELICAL ANTENNA WITH metallic disk.pdf
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MMMM
35 dBi gain maybe with an amplifier
Looks like a wideband monopole
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Can I put more than one disk?
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Other Simulations with disk gives me poor axial ratio
I didn't test just this
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in HF, VHF and UHF
Posted
I already posed a question about this antenna, I made some simulations, have you succeded to simulate it?