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What are the characteristics of the AN11180 antenna design?

Question asked by Edwin Beller on Feb 12, 2020
Latest reply on Feb 13, 2020 by Kan_Li


I implemented the SL3S4021FHK to my design using the EU reference antenna of "AN11180 UCODE I2C PCB antenna reference designs". Here's a picture of antenna design:


It doesn't reach the proposed distance of ~10 meters, let alone a single meter. I tried researching the type of antenna but got no definite idea about it. I'm fairly new to antennas, too.


Thus my question:

What type of antenna is this? Is it truly a slot antenna, because the wide opening resembles more of a loop antenna?

What parameters factor in when adjusting its impedance? Is there a literature recommandation for this?


I'll be needing this for my bachelor thesis.


Thanks a ton and best regards