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SX1262 improved RF match @ 915MHz

Semtech Transceivers SX126x family
#1

The SX1262 915MHz evaluation board and reference schematics are matched to 915MHz in the transmit path but unfortunately matched to 868MHz in the receive path. For correct transmit and receive path RF match plus smaller footprint use Johanson IPD (Integrated Passive Device) Part# 0900FM15D0039E.
Datasheet: https://www.johansontechnology.com/datasheets/0900FM15D0039/0900FM15D0039.pdf

Picture taken using VNA of SX1262 915MHz reference design receive path.

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image974×538 121 KB

BOM for 915MHz kit SX1262MB1CAS

C11 = 2.4pF
C12= 1.8pF
L6 = 15nH

BOM for 868MHz kit SX1262MB1DAS

C11 = 2.4pF
C12= 1.8pF
L6 = 15nH

1 Like
#2

Hi
Although its great to have a reference design catering for the Johanson IPD. Can we get a component reference that matches the RX path to 915MHz?