README
Copyright (c) 2014-2020 Great Scott Gadgets <info@greatscottgadgets.com>

These files are part of HackRF.

This is a free hardware design; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

This design is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this design; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 51 Franklin Street,
Boston, MA 02110-1301, USA.


LNA915 is a SAW filter and LNA for the 902 to 928 MHz ISM band.  It is designed
for in-line connection between an antenna and HackRF One and is powered by the
HackRF One.

hardware notes:

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

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).