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Hi all,
I just confuse while I trying to design a matching antenna.
First of all, there are two impedance information according to ASIC spec.
1. Chip impedance (915MHz) : a-bj (Ω), with remark "Measured with a 50 Ω source impedance directly on the chip"
2. Typical assembled impedance (915MHz)...
Hi @volker@muehlhaus ,
sorry to my confusion, I am not sure the meaning of device impedance. Does this means antenna impedance with 50Ohms input?
If not, would you like to help to give more details?
Many thanks,
Hi @PlanarMetamaterials ,
The main purpose of this simulation is I want to make sure I use correct processes before I make a design. Therefore, I just simulate a real sample and compare with its performance by Voyantic test bench.
As I know, if test bench shows the longest read range at...
Hello all,
I just want to compare the antenna characteristic between simulation, processed by HFSS 13, and real sample purchased from market. I learned the simulation step by step from forum, YouTube and HFSS helper.
But it comes up with huge different result. I try very hard to get a matched...
Thanks for Volker's tip, I will contact them in the meanwhile.
Hi vfone,
My HFSS setting is as follpwing,
Solution type: Driven Terminal
Substrate: 0.55mm FR-4, 4.4 permitivity with 0.02 loss tangent
Trace: 1.4mil copper, 5.8e7 siemens/m
No bottom ground.
Excitation (input): resistance=21...
Thanks for BigBoss & Volker reply.
Please let me clarify the antenna type, which is meandering dipole antenna. And I design like second picture I showing below.
According to some published research, I think the meandering dipole antenna shows s11 like what I did. Please find the pictures for...
By the way, I also put antenna dimension deviation into simulation. It also come up with almost same freq.
I try all the way to mimic the real situation, but fail.
Hi everyone:
I just made a test sample for UHF antenna after simulation by HFSS 13, like following picture. Result shows narrow band with Peak freq around 865MHz.
(The impedance is not conjugate perfectly, due to some mistake during design)
But after measurement in open space, the actual...
Hi all,
I just encounter a simple problem during my RF simulation.
Simulation antenna => A simple loop antenna with a internal transponder IC input (assume a NXP UCODE seriese)
And I am no sure how to setup the lumped port correctly, so I study from internet and come up with two possible...
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