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Radar v2

ckflight·FMCW-RADAR·Radar 2/Radar v2.kicad_pcb

Radar v2 PCB layout, top view — open source STM32 board by ckflight
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About the Radar v2 PCB

Radar v2 is an open source STM32 PCB design by ckflight, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 90.2 × 40 mm, with 264 components from 79 distinct parts.

Its main chip is the STM32F405, from the STM32 family. Other key parts include the MCP4022, LT1817GN, Check_Point, SG-210STF and 5400BL15B050E. By type, the board carries 108 capacitors, 75 resistors, 51 ICs, 11 diodes, 11 inductors and 4 connectors.

It belongs with the audio designs in this gallery.

From the project

Frequency Modulated Continuous Wave Radar hardware and software design files with 26 dBm output power covering around 250 m.

Check the new design's Python files for better processing and analysis https://github.com/ckflight/FMCWRADAR2v2

$$ Range(radar) = {\sqrt[4]{Pt G^2 \lambda^2 \sigma \over Pmin 4\pi^3}} $$

* Receiver chain has LNA, Gain Block and Mixer. The gain block drops the Noise Figure from 7 dB to 2 dB, which doubles the detection range. To determine the radar detection range, minimum detectable signal is needed. RF receiver chain has thermal noise and it determines the noise floor for Pmin. Signal to Noise (SNR) ratio of 20 dB is assumed for a good detectable signal then:

Radar v2, from the project README
From the project README

Main components on the Radar v2

MCP4022LT1817GNCheck_PointSTM32F405SG-210STF5400BL15B050EADF4158ADL5801TLV172LT6232HMC431LP4TRF37A75PAT1220-C-6DBSKY65404TQP5523SMA_ConnectorMITERED_BENDADC_ConnectorDirectional_CouplerAP3211LDS3985LP298XSMicroCardMAX1426

Radar v2 bill of materials (BOM)

264 components, 79 distinct parts.

QtyPartRefs
1
MCP4022
U1
1
LT1817GN
U2
14
Check_Point
U3, U5, U10, U11, U14, U16, U24, U26 +6
1
STM32F405
U4
1
SG-210STF
U6
2
5400BL15B050E
U7, U13
1
ADF4158
U8
1
ADL5801
U9
1
TLV172
U12
1
LT6232
U15
1
HMC431LP4
U17
1
TRF37A75
U18
2
PAT1220-C-6DB
U19, U27
1
SKY65404
U20
1
TQP5523
U21
2
SMA_Connector
U22, U30
5
MITERED_BEND
U23, U28, U42, U43, U44
1
ADC_Connector
U25
1
Directional_Coupler
U29
2
AP3211
U31, U32
Show 59 more
QtyPartRefs
2
LDS3985
U33, U38
1
LP298XS
U35
1
MicroCard
U37
1
MAX1426
U45
5
Check_Point
U47, U48, U49, U50, U51
1
8MHz
Y1
1
Connector_01x03
J1
1
USB_MicroB
J2
1
Connector_01x06
J3
1
DC_Jack
J4
1
Fuse
F1
1
DFU_Button
SW1
1
Reset_Button
SW2
2
Diode_Schottky
D1, D2
9
Led_Diode
D3, D4, D5, D6, D7, D8, D9, D10 +1
5
BLM18PG181SN1D
L1, L4, L5, L8, L9
2
2.2uH
L2, L3
1
LQW18ANR10J00D
L6
1
0.6nH
L7
2
4.7uH
L10, L11
41
100nF
C1, C2, C3, C4, C7, C8, C10, C20 +33
12
10uF
C5, C12, C63, C64, C89, C91, C92, C95 +4
6
2.2uF
C6, C11, C14, C15, C21, C69
2
33pF
C9, C13
2
15pF
C16, C17
2
1uF
C18, C19
7
100pF
C24, C25, C45, C47, C48, C53, C79
1
470pF
C33
3
18pF
C37, C38, C42
8
10pF
C39, C40, C52, C60, C61, C67, C68, C76
1
330nF
C55
11
10nF
C57, C73, C74, C75, C77, C78, C93, C94 +3
1
2.2nF
C62
2
DNP
C65, C71
4
1nF
C72, C81, C82, C90
1
0.5pF
C83
4
2.2uF
C104, C105, C106, C108
18
1K
R1, R10, R13, R20, R30, R39, R40, R46 +10
5
0
R2, R3, R24, R33, R35
4
22
R5, R6, R12, R74
4
100
R7, R8, R16, R76
2
2.49K
R9, R11
1
49.9
R14
8
DNP
R15, R23, R27, R28, R31, R72, R73, R75
5
4.7K
R17, R19, R36, R37, R63
8
10K
R18, R21, R22, R41, R42, R61, R64, R65
3
50
R25, R29, R59
1
5.49K
R26
1
240
R32
1
100K
R38
1
1.8
R43
2
910
R44, R45
2
130
R47, R48
2
4.99K
R50, R51
3
16.7
R52, R77, R78
1
0 to 27
R57
1
30K
R58
1
51.4K
R60
1
14.7K
R62

Radar v2 design files

The KiCad project lives in the ckflight/FMCW-RADAR repository on GitHub; these links point at the commit this page was built from.

Radar v2: common questions

What microcontroller does the Radar v2 use?

The Radar v2 is built around the STM32F405, from the STM32 family.

How big is the Radar v2 PCB?

The Radar v2 measures 90.2 × 40 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Radar v2?

264 components, from 79 distinct parts. The full bill of materials is listed on this page.

Where can I download the Radar v2 design files?

From the ckflight/FMCW-RADAR repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Radar v2 design in my own project?

Yes, under the terms of its GPL-3.0 license, which ckflight chose for the repository.

Can I test firmware for the Radar v2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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