Customer:
I have your 13.56 MHz RFID reader. Can I use this reader with different antennas or only with the one that came in the set?
Uzeo sam vaš rfid čitač od 13.56 MHz.
Zanima me mogu li ja koristiti taj čitač i sa drugim antenama ili samo sa ovom kojom sam dobio u setu?
Originally submitted via the contact form on soldered.com on 30 March 2020. Migrated to the forum for community visibility.
Soldered Support:
You can use a different antenna, but you need to find one that matches in all parameters. If you plan to make one yourself, keep in mind that this is very complicated work and antennas are generally very difficult to get working properly. Because of this, we strongly recommend not changing the antenna unless you absolutely must.
Evo odgovora ovdje u tom slučaju 
Možete koristiti s drugom antenom, ali morate naći antenu koja odgovara u svim paramterima. Ako ćete ju raditi sami, imaju na umu da je to jako kompliciran posao i da su antene generalno vrlo komplicirane za napraviti da rade dobro. Zbog toga, velika preporuka je da ne mijenjate antenu osim ako baš ne morate.
Customer:
I was thinking of buying a different antenna with a longer range because I can currently read at only a few centimetres distance. I’m interested in whether it’s possible to connect that stronger antenna to Arduino with this reader and program it.
Mislio sam kupiti drugu antenu koja će imati veći domet jer ovako mogu očitati udaljenost na svega nekoliko cm, pa me interesiralo jel moguće povezati tu jaču antenu sa arduinom odnosno ovim čitačem i programirati.
Soldered Support:
Unfortunately that’s very difficult - it must be a powered antenna tuned to that frequency. Engineeringly very demanding.
Nažalost jako teško, to mora biti powered antena tunirana na tu frekvenciju. Inženjerski vrlo zahtjevno