Product Info

SC200L Hardware Design
SC200L_Hardware_Design 62 / 103
NOTE
“*” means under development.
6.1.1 Main and Rx-diversity Antenna Interfaces Reference Design
A reference circuit design for main and Rx-diversity antenna interfaces is shown as below. A π-type
matching circuit should be reserved for better RF performance. The π-type matching components
(R1/C1/C2, R2/C3/C4) should be placed as close to the antennas as possible and are mounted
according to the actual debugging. The C1, C2, C3, and C4 are not mounted and a 0Ω resistor is
mounted on R1 and R2 respectively by default.
Figure 27: Reference Circuit Design for Main and Rx-diversity Antenna Interfaces
6.1.2 Reference Design of RF Layout
For user’s PCB, the characteristic impedance of all RF traces should be controlled to 50Ω. The
impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant,
LTE-TDD B38 2570~2620 2570~2620 MHz
LTE-TDD B39 1880~1920 1880~1920 MHz
LTE-TDD B40 2300~2400 2300~2400 MHz
LTE-TDD B41 2496~2690 2496~2690 MHz