Copyright 2012-2022 Great Scott Gadgets 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. HackRF One is a wideband software radio transceiver with a USB interface. hardware notes: Schematic and layout files were designed in KiCad, an open source electronic design automation package. order of copper layers: Copper 1: C1F (front) Copper 2: C2 Copper 3: C3 Copper 4: C4B (back) PCB description: 4 layer PCB 1.6 mm Copper 1 0.035 mm Prepreg 1-2 0.2104 mm Copper 2 0.0152 mm Core 2-3 1.065 mm Copper 3 0.0152 mm Prepreg 3-4 0.2104 mm Copper 4 0.035 mm 7628 prepreg with Er=4.6 (+/- 0.1) required impedance: 50 ohm (+/- 5%) 11.55 mil microstrip impedance double side solder mask green single side silkscreen white 6 mil min trace width and 6 mil min isolation