Hi, I would like to get more detailed datsheet with RF design reference. I applied for access on developer zone access and send email about one week ago but so far no any response. Could someone from BoufalloLab contact me or grand me the access?
Hi, There is no detailed RF design guide in developer zone. The most comprehensive guide is here http://download.bl602.fun/BL70X_hardware_design_guidelines_cn.pdf But it has only a few words regarding RF part of design:
2.1.4 RF matching network BL70X The RF pin input impedance is approximately 25 Ohm, it is recommended to reserve a matching network in the circuit design, mainly for impedance matching and stray harmonic suppression, it is recommended to use π type (CLC) matching network structure, the specific network component parameters need to be based on the actual antenna design and PCB the impedance characteristics are debugged. Notice: When debugging the impedance matching network, it is necessary to make the load impedance of the chip port as about 25 ohms, and try to ensure that the load impedance is in the capacitive region. In circuit design, it is recommended to reserve a fifth-order matching network to ensure the harmonic suppression effect.
2.1.4 RF matching network BL70X The RF pin input impedance is approximately 25 Ohm, it is recommended to reserve a matching network in the circuit design, mainly for impedance matching and stray harmonic suppression, it is recommended to use π type (CLC) matching network structure, the specific network component parameters need to be based on the actual antenna design and PCB the impedance characteristics are debugged. Notice:
makc Thank you so much! It's good starting point 😉
