adf-24g-tx2rx8 frontend (user manual) · adf-24g-tx2rx8 frontend (user manual) inras gmbh...

ADF-24G-TX2RX8 Frontend(User Manual)

Inras GmbHAltenbergerstraße 694040 Linz, AustriaEmail: [email protected]: +43 732 2468 6384

Linz, July 2015

ADF-24G-TX2RX8

Contents

1 Document Version 2

2 Hardware Version 2

3 24-GHz MIMO Frontend 3

4 Features of the 24-GHz FMCW Radar System 3

5 Technical Data of the 24-GHz Frontend 55.1 Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55.2 Antenna Configuration and Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.3 Electrical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85.4 Frontend Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 List of Abbreviations 12

1 Document Version

Version Description Date Author

1.0.0 Initial Version 2015-07-01 Andreas Haderer (AnHa)

2 Hardware Version

Board Name HUID Revision Date

ADF-24-TX2RX8-D03 202 1.0.3 2015-06

© Inras GmbH 2 AnHa

ADF-24G-TX2RX8

3 24-GHz MIMO Frontend

In Fig. 1 the block diagram of the 24-GHz frontend with two transmit (TX) and eight receive (RX)antennas is shown. According to the block diagram, an ADF5901 (VCO and two output channels) inconjunction with the ADF4159 (fractional-N frequency synthesizer) is used to generate the FMCWtransmit signal. The two transmit antennas (TX1 and TX2) are fed from the power amplifiers ofthe ADF5901 and can therefore be activated in an arbitrary sequence. The activation sequence canbe programmed with the timing unit and the MIMO sequencer implemented in the FPGA of theRadarbook. The receive path is realized with two ADF5904 (four-channel RX down-converter).

Figure 1: Antenna configuration and naming convention for 24-GHz frontend.

The LO signal for the receiver chips is provided by the ADF5901 and an additional Wilkinsondivider. The naming convention for the transmit chip (ADTX) and the receive chips (ADRX1 andADRX2), depicted in the block diagram, is used in the software framework to access the differentdevices. This is required to program defined activation sequences for the transmit antennas and toconfigure the receive path.

4 Features of the 24-GHz FMCW Radar System

The frontend is designed to operate with the Radarbook and can be configured freely to the needsof the application at hand. The main features of the frontend include

� Two TX channels (ADF5901),

� Eight RX channels (two ADF5904) with differential IF outputs,

� Amplitude power control for the transmit channels,

� Differential signals for clock synchronization (input and output of RF clock), and


ADF-24G-TX2RX8

� Frontend identification and storage of calibration data by means of an integrated EEPROM.

The frontend can be operated with the Radarbook. The Radarbook offers a TCP/IP or a USB 3.0interface, which can be used to configure the modes of operation for the FMCW radar system. Thetiming of the FMCW waveform as well as the FMCW ramp parameters can be programmed andthe IF signals can be recorded in real-time. The main features provided by the Radarbook include

� Sampling rates up to 20 MSPS per IF channel,

� FMCW ramp synchronous sampling for precise range-Doppler processing,

� Arbitrarily programmable FMCW timing including non-uniform ramp scenarios,

� MIMO processing with arbitrary antenna activation,

� Monitoring of analog test signals for ADTX and ADRX,

� Configurable signal processing, and

� 100 MBit TCP/IP or USB 3.0 interface.


ADF-24G-TX2RX8

5 Technical Data of the 24-GHz Frontend

In the following sections the mechanical and the electrical parameters of the frontend are summa-rized.

5.1 Mechanical Data

The frontend is built to interface with the Radarbook. In Fig. 2 the dimensions of the board as wellas the position of the mounting holes are depicted. In Tab. 1 the dimensions of the frontend and

PAARx101PAARx102

COARx1

PAARx201PAARx202

COARx2

PAARx301

COARx3

PAARx401PAARx402

COARx4

PAARx501PAARx502

COARx5

PAARx601PAARx602

COARx6

PAARx701PAARx702

COARx7

PAARx801PAARx802

COARx8

PAATx101PAATx102

COATx1

PAATx201PAATx202

COATx2

PAC101 PAC102COC1

PAC201 PAC202COC2

PAC301 PAC302COC3

PAC402PAC401 COC4

PAC501PAC502COC5

PAC601PAC602COC6 PAC701

PAC702COC7

PAC802

PAC801COC8

PAC901PAC902COC9

PAC1001PAC1002COC10

PAC1101

PAC1102COC11

PAC1202PAC1201 COC12

PAC1301

PAC1302COC13

PAC1402PAC1401COC14


PAC1602COC16PAC1701PAC1702COC17

PAC1801PAC1802COC18

PAC1901PAC1902

COC19PAC2001 PAC2002COC20

PAC2101PAC2102COC21

PAC2201PAC2202COC22


PAC2402COC24

PAC2501PAC2502COC25

PAC2601PAC2602COC26


PAC2802COC28 PAC2901

PAC2902COC29PAC3001

PAC3002COC30

PAC3101 PAC3102COC31




PAC3502PAC3501COC35

PAC3602PAC3601COC36


PAC3801COC38

PAC3902PAC3901COC39

PAC400Rx101PAC400Rx102COC400Rx1PAC400Rx201PAC400Rx202COC400Rx2

PAC410Rx101PAC410Rx102COC410Rx1PAC410Rx201PAC410Rx202COC410Rx2

PAC420Rx101PAC420Rx102COC420Rx1PAC420Rx201PAC420Rx202

COC420Rx2

PAC430Rx101 PAC430Rx102COC430Rx1

PAC430Rx201PAC430Rx202COC430Rx2

PAC4402PAC4401COC44PAC4601

PAC4602COC46 PAC4701PAC4702

COC47 PAC4801PAC4802COC48



PAC5102COC51

PAC5201

PAC5202COC52

PAC5301PAC5302COC53PAC5401

PAC5402COC54

PAC5502 PAC5501COC55PAC5601PAC5602COC56




PAC6302COC63

PAC640IF102

PAC640IF101COC640IF1PAC640IF202















PAC650IF801COC650IF8

PAC6601PAC6602COC66

PAC6701PAC6702COC67

PAC6801PAC6802COC68

PAC6901PAC6902COC69

PAC7001PAC7002COC70

PAC7101

PAC7102COC71

PAC7201PAC7202COC72

PAC7301PAC7302COC73

PAL102PAL101COL1

PAL202PAL201COL2

PAL302PAL301COL3

PAL402

PAL401COL4

PAL502PAL501COL5 PAL602 PAL601COL6

PAL701PAL702COL7

PAL801PAL802

COL8

PAL901 PAL902COL9

PAL100Rx101

PAL100Rx102COL100Rx1PAL100Rx201

PAL100Rx202COL100Rx2

PAL1201PAL1202COL12

PAL1302PAL1301COL13PAL1402PAL1401COL14

PAL1501PAL1502COL15

PAM100COM1

PAM200COM2

PAM300COM3

PAM400

COM4

PAM500COM5PAM600

COM6

PAPC101PAPC103

PAPC102

COPC1

PAR102PAR101COR1

PAR202PAR201COR2

PAR301PAR302COR3

PAR402 PAR401COR4

PAR501

PAR502COR5

PAR601 PAR602COR6PAR701PAR702COR7

PAR801PAR802COR8PAR901

PAR902COR9

PAR1001PAR1002COR10PAR1101 PAR1102COR11

PAR1201PAR1202COR12

PAR1301PAR1302COR13

PAR1402PAR1401COR14

PAR1502

PAR1501COR15

PAR1602PAR1601COR16PAR1702PAR1701COR17

PAR1801PAR1802COR18

PAR190Rx101

PAR190Rx102COR190Rx1PAR190Rx201

PAR190Rx202

COR190Rx2

PAR2001PAR2002

COR20

PAR2101 PAR2102COR21

PAR2201 PAR2202COR22

PAR2301PAR2302COR23

PAR2401PAR2402COR24

PAR2501PAR2502COR25PAR2601PAR2602COR26

PAR2702PAR2701COR27

PAR2801PAR2802COR28

PAR3001PAR3002COR30

PAR3101PAR3102COR31

PAR3202PAR3201COR32

PAR330Rx101PAR330Rx102

COR330Rx1PAR330Rx201PAR330Rx202

COR330Rx2

PAR3402

PAR3401COR34

PAR3502PAR3501COR35

PAR3601

PAR3602COR36

PAR3702PAR3701COR37

PAR3801PAR3802COR38PAR3901

PAR3902COR39

PAR410IF102PAR410IF101

COR410IF1PAR410IF202 PAR410IF201






COR410IF7PAR410IF802PAR410IF801

COR410IF8

PAR420IF102PAR420IF101







COR420IF7PAR420IF802PAR420IF801

COR420IF8PARA108PARA107PARA106PARA105

PARA103PARA104PARA102PARA101 CORA1

PARA208PARA207PARA206PARA205PARA203PARA204PARA202PARA201 CORA2

PARA308PARA307PARA306PARA305





PARA503 PARA504PARA502PARA501 CORA5

PARA608PARA607PARA606PARA605PARA603 PARA604PARA602PARA601 CORA6

PAU101PAU102

PAU103PAU104PAU105PAU106

PAU107PAU108 PAU109PAU1010PAU1011 PAU1012PAU1013

PAU1014PAU1015PAU1016

PAU1017PAU1018

PAU1019PAU1020PAU1021PAU1022PAU1023PAU1024

PAU1025

COU1

PAU209

PAU2010

PAU2011

PAU2012

PAU2013


PAU208

PAU207

PAU206

PAU205

PAU204

PAU203PAU202PAU201

COU2


PAU3012

PAU3013

PAU3014

PAU3015

PAU3016

PAU308PAU307PAU306

PAU305

PAU304

PAU303

PAU302

PAU301

COU3

PAU4033


PAU4029PAU4028PAU4027PAU4026PAU4025

PAU4024PAU4023PAU4022PAU4021PAU4020PAU4019PAU4018PAU4017PAU4016PAU4015


PAU4011PAU4010

PAU409

PAU408PAU407PAU406 PAU405PAU404PAU403PAU402PAU401

COU4

PAU50Rx1033PAU50Rx101PAU50Rx102PAU50Rx103

PAU50Rx104PAU50Rx105PAU50Rx106PAU50Rx107PAU50Rx108

PAU50Rx109PAU50Rx1010PAU50Rx1011PAU50Rx1012PAU50Rx1013PAU50Rx1014PAU50Rx1015PAU50Rx1016PAU50Rx1017PAU50Rx1018

PAU50Rx1019PAU50Rx1020PAU50Rx1021

PAU50Rx1022PAU50Rx1023PAU50Rx1024PAU50Rx1025PAU50Rx1026PAU50Rx1027PAU50Rx1028PAU50Rx1029 PAU50Rx1030PAU50Rx1031PAU50Rx1032

COU50Rx1PAU50Rx2033PAU50Rx201PAU50Rx202PAU50Rx203

PAU50Rx204PAU50Rx205PAU50Rx206PAU50Rx207PAU50Rx208

PAU50Rx209PAU50Rx2010PAU50Rx2011PAU50Rx2012PAU50Rx2013PAU50Rx2014PAU50Rx2015PAU50Rx2016PAU50Rx2017PAU50Rx2018

PAU50Rx2019PAU50Rx2020PAU50Rx2021

PAU50Rx2022PAU50Rx2023PAU50Rx2024PAU50Rx2025PAU50Rx2026PAU50Rx2027PAU50Rx2028PAU50Rx2029PAU50Rx2030 PAU50Rx2031PAU50Rx2032

COU50Rx2


PAU604PAU603PAU602PAU601COU6



PAU804

PAU805

PAU803

PAU802

PAU801

COU8




PAU1005PAU1004

COU10

PAU1101

PAU1102

PAU1103

PAU1105

PAU1104

COU11

PAX1081PAX100

PAX1082PAX1080

PAX1079

PAX1078

PAX1077

PAX1076

PAX1075

PAX1074

PAX1073

PAX1072

PAX1071

PAX1070

PAX1069

PAX1068

PAX1067

PAX1066

PAX1065

PAX1064

PAX1063

PAX1062

PAX1061

PAX1060

PAX1059

PAX1058

PAX1057

PAX1056

PAX1055

PAX1054

PAX1053

PAX1052

PAX1051

PAX1050

PAX1049

PAX1048

PAX1047

PAX1046

PAX1045

PAX1044

PAX1043

PAX1042

PAX1041

PAX1040

PAX1039

PAX1038

PAX1037

PAX1036

PAX1035

PAX1034

PAX1033

PAX1032

PAX1031

PAX1030

PAX1029

PAX1028

PAX1027

PAX1026

PAX1025

PAX1024

PAX1023

PAX1022

PAX1021

PAX1020

PAX1019

PAX1018

PAX1017

PAX1016

PAX1015

PAX1014

PAX1013

PAX1012

PAX1011

PAX1010

PAX109

PAX108

PAX107

PAX106

PAX105

PAX104

PAX103

PAX102

PAX101

COX1

PAY101PAY102

PAY103 PAY104 COY1

PAY201

PAY202PAY203

PAY204COY2

PAC1602PAC1702 PAL602

PAU2016

PAU3016

PAC502PAC602PAC702

PAC802PAL202

PAR202

PAU1018

PAU1019

PAC102PAC202

PAC302

PAC402 PAL102

PAU106PAU107PAU108

PAC5402 PAR2602

PAR3502PAY101

PARA503

PAU306

PARA504

PAU304

PAC1901PAC2002PAR602

PAU1024PAU1017

PAU3011

PAR401

PAU2010

PAU1014

PAU2013

PAU1016

PAU2011

PAU1015

PAU2012

PAR902

PAU1020

PAR502

PAU1021

PAU1012

PAU3013

PAR1801

PARA502

PAC400Rx102PAC410Rx102

PAC420Rx102

PAC430Rx102 PAL100Rx102

PAR190Rx102

PAU50Rx104PAU50Rx1021

PAU50Rx1027PAC400Rx202

PAC410Rx202

PAC420Rx202

PAC430Rx202PAL100Rx202

PAR190Rx202


PAU50Rx2027

PAARx102PAARx202PAARx402PAARx502PAARx602PAARx702PAARx802

PAATx102

PAATx202

PAC101PAC201

PAC301

PAC401

PAC501PAC601PAC701

PAC801

PAC901PAC1001PAC1101

PAC1201

PAC1501 PAC1601PAC1701PAC1801

PAC1902

PAC2101

PAC2201

PAC2301 PAC2401

PAC2501

PAC2601

PAC2701 PAC2801 PAC2901

PAC3001


PAC3401

PAC3701 PAC3801

PAC3902





PAC4402

PAC4602 PAC4702 PAC4802

PAC4901

PAC5001 PAC5101

PAC5201

PAC5301PAC5401

PAC5501PAC5601

PAC5701

PAC5801

PAC6201

PAC6302

PAC6601

PAC6701

PAC6801

PAC6901

PAC7001

PAC7101

PAC7201

PAC7301

PAL402

PAR101

PAR302

PAR1001PAR1101

PAR1201

PAR1301

PAR1401

PAR1701

PAR3501

PAU102

PAU103

PAU1010PAU1011

PAU1025

PAU208 PAU209

PAU2014PAU2015

PAU303

PAU308PAU309

PAU3014

PAU3015

PAU401PAU403PAU406PAU408PAU4010

PAU4012PAU4013

PAU4019

PAU4033

PAU50Rx101

PAU50Rx103

PAU50Rx105


PAU50Rx1020

PAU50Rx1022

PAU50Rx1024PAU50Rx1028 PAU50Rx1030


PAU50Rx203

PAU50Rx205


PAU50Rx2020

PAU50Rx2022

PAU50Rx2024PAU50Rx2028 PAU50Rx2030

PAU50Rx2033

PAU608

PAU704

PAU802

PAU903PAU904

PAU907

PAU1002

PAU1102

PAX101

PAX102

PAX1011 PAX1013 PAX1015 PAX1017 PAX1035

PAX1036

PAX1039

PAX1040

PAX1043

PAX1044

PAX1047

PAX1048

PAX1063

PAX1064

PAX1075

PAX1076PAX1081 PAX1082

PAY102

PAY202


PAC3402

PAL902

PAR1502

PAU4014

PAU4016

PAU4017

PAR2002

PAU50Rx2015

PAR2301

PAU50Rx1015

PAR2401

PAU409

PARA108

PAX1077

PARA107

PAX1079

PARA105

PAX1078

PARA106

PAX1080

PAC902PAC1002

PAC1102

PAC1202PAL302

PAU1022

PAR2202 PAR2802PAR3202

PAR3402

PAU701

PAC5702

PAC5802

PAL1402

PAU702

PAU706

PAU801 PAU1101

PAR2102

PARA104

PAU1103

PAR2101

PARA103

PAU1104

PARA101

PAU804

PARA102

PAU803

PAL401PAU101

PAC5002 PAC5102

PAC5202

PAL1202 PAU601

PARA602

PAU606

PARA603

PAU605

PARA601

PAU607

PAC6202 PAC6301

PAR3802PAR3902

PARA201

PAU901PAU902

PAU908PAR3801

PARA203

PAU906PAR3901

PARA202

PAU905

PAC650IF101PAR420IF101

PAU50Rx2016


PAU50Rx2017


PAU50Rx2026


PAU50Rx2025


PAU50Rx2032


PAU50Rx2031


PAU50Rx208


PAU50Rx209


PAU50Rx1016


PAU50Rx1017


PAU50Rx1026


PAU50Rx1025


PAU50Rx1032


PAU50Rx1031


PAU50Rx108


PAU50Rx109

PAC4401PAR3702

PAX109

PAC4601 PAR2001

PAX107

PAC4701PAR2302

PAX105

PAC4801PAR2402

PAX103


PAX1010


PAX108


PAX106


PAX104


PAX1033


PAX1031


PAX1029


PAX1027


PAX1026


PAX1024


PAX1022


PAX1020


PAX1034


PAX1032


PAX1030


PAX1028

PAX1023 PAX1025PAX1019 PAX1021

PAX1016 PAX1018PAX1012 PAX1014

PAPC103PAR3601

PAU50Rx2029

PAPC102PAR3602

PAU50Rx1029

PAPC101

PAU4011

PAC1302PAC1401

PAR102

PAC1402

PAU109

PAC2001PAR802

PAC2102 PAR501

PAR601PAR701PAC2202 PAR702

PAU4029

PAC3502PAC3601

PAR1402

PAC3602

PAU4015

PAC3702

PAU4032

PAC3802

PAU4031

PAC3901

PAU4018

PAC4902

PAU602

PAC5302 PAR2502PAR2601

PAC6902PAL1502

PAU1001PAU1003

PAR201

PAR402

PAU1013

PAR301

PAU1023

PAR801PAR901

PAR1202

PAR1002

PAU305

PAR1102

PAU3010

PAR1302PAU4026

PAR1501

PAR1602

PAR1702

PAU4020

PAR1802

PAU4025

PAR190Rx101

PAU50Rx1013

PAR190Rx201

PAU50Rx2013

PAR2201PAU1105

PAR2501

PAU603PAU604

PAR2702

PAY201

PAR2801

PAY103PAR3001

PAU703

PAR3102

PAU4024

PAR330Rx102

PAU50Rx1014

PAR330Rx202

PAU50Rx2014

PAR3401

PAY203

PAU104PAU4028PAU105PAU4027 PAC7002PAL201

PAL601

PAR3701

PAU1005

PAC1301

PAU708PAC3501

PAU707

PAR3002

PAR3201PAU805

PARA508

PAX1074PAX1072

PARA506

PAX1070PAX1068

PARA505

PAX1073

PARA408

PAX1071

PARA507

PAX1069

PARA605

PAX1067

PAX1066PARA606

PAX1065

PARA407

PAX1062PARA607

PAX1061

PARA406

PAX1060

PAX1059

PARA405

PAX1058

PAX1057

PARA308

PAX1056

PAX1055

PARA307

PAX1054PARA206

PAX1053

PARA306

PAX1052PARA207

PAX1051

PARA305

PAX1050PARA205

PAX1049

PAARx101

PAU50Rx102

PAARx201

PAU50Rx106

PAARx301

PAU50Rx1019

PAARx401

PAU50Rx1023

PAARx501

PAU50Rx202

PAARx601

PAU50Rx206

PAARx701

PAU50Rx2019

PAARx801

PAU50Rx2023

PAC1502PAC1802PAL502

PAU201PAU202PAU203

PAU301

PAU302

PARA304

PAU204

PAU4021PAU50Rx1011PAU50Rx2011

PARA501

PAU207

PARA404

PAU206

PARA301

PAU50Rx2010

PARA302

PAU50Rx1010

PARA401

PAU205

PAU4022PAU50Rx1012PAU50Rx2012

PAR3101

PAR330Rx101PAR330Rx201

PARA403

PAR1601

PARA303 PARA402

PAU4023

PAATx101

PAU402

PAATx201

PAU407PAC2702 PAC2802 PAC2902PAC3002 PAL802

PAU404PAU405

PAC6602

PAC6702

PAC6802

PAL101

PAL301

PAL501

PAL1201

PAL1501

PAX1037

PAX1038

PAX1041

PAX1042

PAC7102

PAC7202

PAC7302

PAL701

PAL801

PAL901

PAL100Rx101PAL100Rx201

PAL1301PAL1401

PAX1045

PAX1046

PAC2302 PAC2402

PAC2502

PAC2602

PAL702

PAU4030

PAC5502PAC5602

PAL1302

PAR2701

PAY104

PAY204

Figure 2: Dimensions of the 24-GHz frontend including the position of the mounting holes.

its weight are summarized. The frontend is very lightweight as no additional heat sink is integratedon the frontend.

Parameter Value

Substrate RO-4350

RF-Substrate thickness 0.25 mm

Dimension x-direction 100 mm

Dimension y-direction 100 mm

Weight frontend 40 g

Weight (frontend and Radarbook) 177 g

Weigth (frontend, Radarbook, and housing) 410 g

Table 1: Mechanical parameters of the 24-GHz frontend.

An Altium template containing the contour and position of the frontend connector is availableon request.


ADF-24G-TX2RX8

5.2 Antenna Configuration and Positions

The positions of the transmit and receive antennas are shown in Fig. 3. The origin of the Cartesiancoordinate system is located at the first transmit antenna TX1. In Tab. 2 the x-coordinates of theantennas are summarized. All mentioned positions are in mm. Due to the size constraint for

Figure 3: Antenna positions of the 24-GHz RF frontend.

the frontend it is not possible to generate a larger array by switching between the two transmitantennas.

TX Antenna x-Position (mm) RX Antenna x-Position (mm)

TX1 0.000 RX1 24.798

TX2 9.325 RX2 31.015

RX3 37.233

RX4 43.450

RX5 49.668

RX6 55.886

RX7 62.103

RX8 68.321

Table 2: Positions of transmit and receive antennas.

The receive and transmit antennas are built by serial fed patch antennas with eight elements,which are fed from the backside of the PCB. In Fig. 4 the realized gain for the E- and H-plane ofa single antenna element are shown.

In Tab. 3 the parameters of the antennas are summarized.

Parameter Value

G Realized Gain 13.2 dBi

∆S Sidelobe suppression -18 dB

ΘH Horizontal 3 dB beamwidth 76.5◦

ΘV Vertical 3 dB beamwidth 12.8◦

Table 3: Antenna parameters.


ADF-24G-TX2RX8

Figure 4: Realized gain for the antenna elements at 24.125 GHz.


ADF-24G-TX2RX8

5.3 Electrical Parameters

In Tab. 4 the electrical parameters of the frontend are specified.

Parameter Condition Min Typ Max Unit

VC1 Supply Voltage C1 - 3.2 3.3 3.4 VVC2 Supply Voltage C2 not used 4.9 5.0 5.1 VVC3 Supply Voltage C3 - 3.2 3.3 3.4 VIC1 Supply Current C1 @ 3.3 V / all TX enabled - - 200 mAIC2 Supply Current C2 @ 5.0 V - - - mAIC3 Supply Current C3 @ 3.3 V - - 600 mA

Pt Max RF Output Power 8 dBmTX ON/OFF Isolation - 30 dB

ft Transmit Frequency 24 - 24.25 GHz

TX-RX Isolation - TBD

Table 4: Electrical parameters of the 24-GHz frontend.

For a more detailed description of the electrical parameters refer to the data sheet of thetransceivers (ADF5901 and ADF5904) from Analog Devices.


ADF-24G-TX2RX8

5.4 Frontend Connector

The RF connector is used to interface the frontend with the Radarbook. The connector supportsthree programmable supply voltages, 24 digital control signals for the configuration of the frontend,12 differential IF signals, and four analog signals for status monitoring. In Fig. 5 the schematic ofthe connector is shown.

Figure 5: Schematic of the frontend connector.

The digital control signals are used for operating and testing the FMCW frontend. The digitalsignals require a 3.3 V CMOS standard. The configuration of the receivers (ADRX), the synthesizer,and the transmitter (ADTX) is done with an SPI interface. The devices share a common SPIinterface named (Spi).


ADF-24G-TX2RX8

PIN Signal Radarbook Signal Frontend Description

74 FpIO HS1 ADF4159.Trig Trigger signal

72 FpIO HS2 - Not used

70 FpIO HS3 ADF5901MuxOut ADF5901 Mux Output signal

68 FpIO HS4 - Not used

73 FpIO HS5 Spi.PllCe ADF4159 Chip Enable

71 FpIO HS6 Spi.PllEna ADF4159 Latch Enable

69 FpIO HS7 ADF4159.MuxOut ADF4159 Mux Output

67 FpIO HS8 DacSpi.Si DAC Slave In (DAC not assembled)

Table 5: Digital control signals for operating the FMCW frontend.


66 FpIO LS1 - Not used

65 FpIO LS2 DacSpi.Clk DAC clock (DAC not assembled)

62 FpIO LS3 Spi.So Spi slave output

61 FpIO LS4 DacSpi.Ena DAC SPI enable (DAC not assembled)

60 FpIO LS5 Spi.TxEna ADF5901 SPI enable


58 FpIO LS7 Spi.Si Spi slave input


56 FpIO LS9 Spi.Clk Spi clock


54 FpIO LS11 Spi.TxCe ADF5901 chip enable

53 FpIO LS12 EEP.Sda EEPROM Serial data

52 FpIO LS13 Spi.Rx1Ena ADRX1 ADF5904 Spi enable

51 FpIO LS14 EEP.Scl EEPROM Serial clock

50 FpIO LS15 Spi.Rx2Ena ADRX2 ADF5904 Spi enable

49 FpIO LS16 EEP.S3V3 EEPROM supply voltage

Table 6: Digital control signals for operating the FMCW frontend.


8,10 IFG1.IF1 P N IF.4 P N IF signal RX5








Table 7: Analog IF signals for the receive channels.


ADF-24G-TX2RX8


7 IfAna.VAna2 IntMon.RX1 ADRX1 Analog test

5 IfAna.VAna3 IntMon.RX2 ADRX2 Analog test

3 IfAna.VAna4 IntMon.TX ADTX Analog test

Table 8: Monitoring signals (analog) for the 24-GHz frontend.


ADF-24G-TX2RX8

6 List of Abbreviations

FIFO . . . First In First Out

FMCW . . . Frequency-Modulated Continuous Wave

FPGA . . . Field Programmable Gate Array

MMP . . . Memory Mapped Peripheral

MIMO . . . Multiple Input Multiple Output

MISO . . . Master In Slave Out

MOSI . . . Master Out Slave In

RF . . . Radio Frequency

RX . . . Receive

SEQTRIG . . . Sequence Trigger Unit

SPI . . . Serial Peripheral Interface

TX . . . Transmit

USPI . . . Universal Serial Peripheral Interface


adf-24g-tx2rx8 frontend (user manual) · adf-24g-tx2rx8 frontend (user manual) inras gmbh...

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