LNA1109

LNA1109 is an in-line SMA Low Noise Amplifier with SAW filter.

hardware notes

Schematic and layout files were designed in KiCad, an open source electronic design automation package.

This design may be assembled with any SAW filter with a standard 1.1 x 0.9 mm footprint.

The PCB is designed to fit the Crystek SMA-KIT-1.5MF housing.

order of copper layers:
    Copper 1:  F (front)
    Copper 2:  In1
    Copper 3:  In2
    Copper 4:  B (back)

PCB description: 4 layer PCB 0.8 mm
    Copper       1:  0.035 mm (1 oz)
    Dielectric 1-2:  0.2 mm prepreg
    Copper       2:  0.0175 mm (0.5 oz)
    Dielectric 2-3:  0.265 mm core
    Copper       3:  0.0175 mm (0.5 oz)
    Dielectric 3-4:  0.2 mm prepreg
    Copper       4:  0.035 mm (1 oz)

7628 prepreg with Er=4.6
double side solder mask green
double side silkscreen white
7 mil minimum trace width
5 mil minimum isolation

PCBs of this specification are available from JLCPCB (JLC7628 4-layer 0.8 mm stackup).

frequency options

LNA1109 may be populated with different components to support various frequency bands.

frequency band	U4 part number	L1-L4 part number	C1-C6 part number
902-928 MHz	FAR-F5QA-915M00-M2AK	HK1005R10J-T	GCM1555C1H470JA16D
1559-1606 MHz	F6QA1G582H2JM	HK100539NJ-T	GCM1555C1H180JA16D
2402-2483 MHz	F6FC2G441H4PE	HK100527NJ-T	GCM1555C1H100JA16D