rgo one automatic antenna tuner l -...

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RGO ONE Automatic Antenna TunerOperating manual

Rev. 1.01b

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RGO ONE internal ATU option is compact plug & play module that allows non resonant (off resonant) antennas to be connected to RGO ONE output and used on most HF bands. Variety of antennas can be used: coaxial fed dipoles, verticals, yagis and loops. With proper transformer connected a balanced feedlines/antennas can be used. Circuit topology uses L-C (series L – shunt C) configuration, relay switched L bank of 7 components and C bank of 8 components giving 128x256=32768 possible combinations. Capacitor bank can be either connected as LoZ or HiZ configuration (C switched to transceiver or antenna side) which doubles possible tuning steps. RGO ONE main board microcontroller instantly monitors and tunes loads within assigned safe SWR limits. In order to protect board components, tuning of outside SWR limits is not allowed. Parameters from successful tuning are stored in dedicated memory locations where smart tuning algorithm can easily and fast acquire them when needed. Antenna tuner option when installed is right on the RX/TX path and on receive acts as additional selective filter/transformer for signals coming from the antenna.

Introduction

Specifcations:

- Tuning range Z = 8 - 300 Ω - L-C tank circuit Series L bank (128 values); Shunt C bank (256

values) switchable in LoZ/HiZ configuration - L-C ranges L~0 - 8.4µH in 128 steps; C~0 – 2500pF in 256

steps - SWR Range Up to 6:1 for bands 80-10m; Up to 4:1 for 160m

band. (SWR protection for higher values). - Memory locations 98 segment memories cover all HF amateur

bands 1.8 – 29.7MHz - Tuning Time 3÷9sec. typical for initial tune-up (80/160m

higher);

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2. When ATU is properly installed and menu 34 is on - TUN icon on LCD is permanently lit.

4. Once SWR criteria (SWR1.2) a second long press of XMT button within 1.5 sec from previous tuning activates fine tune TUNEprocedure. ATU will try to refine the combinations of L/C in order to obtain better SWR.

7. Tuning process can be stopped any time by pressing PTT/paddle/keyer lines or XMT buttonTUNE

1. Activate ATU (if installed) in menu 34. Turn parameter on. When this parameter is off - ATU is in bypass mode L=0; C=0; HiZ.

ATU operation

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Relays are controlled over RGO ONE main board microcontroller which monitors SWR and frequency and take actions according to operator's request. In order to reduce current drain on receive relays are supplied via R4. On transmit R4 is shortened and all relays are supplied with nominal current.

All capacitors in RF tank circuit are multilayer ceramic high voltage 1000V(2000V) C0G type. Inductors are wound over MICROMETALS ™ metal powder T68 and T50 torroids. L1 and L2 are air wound inducrtors.

To reduce RF stray and EMI inside RGO ONE chassis, ATU board is well shielded.

SCHEMATICSATU board consist of U1 - MCP23017 16bit I²C expander, U3, U4 - ULN2803 relay

drivers, DPDT relays RL1 – RL16 Fujitsu NA-12W and L-C tank components L1 – L7 and C1 – C13. T1 and T2 shorten resistor R4 which increase relays current and speed to nominal value.

Page 1 of 1 (05-Apr-2020)

ATU_151016005 - ATU

A A

B B

C C

D D

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

AUTOMATIC ANTENNA TUNER

1J1

GND

1J2

1J5

1

TO MB

J3

13V

GND

GND

SDA_A

T

ATU

ST

1 2 3 4 5 6 7 8 9 10

ATU JP1

SCL_AT

3V3

GND

GND

GND

L10.05uH

CU 0.8MM

T50-2

L20.1uH

L30.22uH

L40.45uH

L51uH

L62.2uH

L74.4uH

C110p

GND

C220p

GND

C339p

GND

C439p

GND

C539p

GND

C682p

GND

C782p

GND

C8160p

GND

R1

SMD

10k

SDA_ATSCL_AT

1

2

CX1

ATUIN #11

GND

1

2

CX2

ATUOUT #10

GND

C9160p

GND

C10330p

C11330p

GND GND

C12620p

C13620p

GNDGND

12SCK

13SDA

10VSS

9

VDD

15A0

16A1

17A2

18RST

19INTB

20INTA

21GPA0

22GPA1

23GPA2

24GPA3

25GPA4

26GPA5

27GPA6

28GPA7

1GPB0

2GPB1

3GPB2

4GPB3

5GPB4

6GPB5

7GPB6

8GPB7

U1 MCP23017

GNDGND

3V3

3V3

3V313V

10COM

118C

127C

136C

145C

154C

163C

172C

181C

11B

22B

33B

44B

55B

66B

77B

88B

9GND

U3

ULN2803ADW

10COM

118C

127C

136C

145C

154C

163C

172C

181C

11B

22B

33B

44B

55B

66B

77B

88B

9GND

U4

ULN2803ADW

C16

100n

GND

13V

GND

13V

C17

100n

GND

1

12

RL1.A

9

43

510

8

RL1.B

9

43

510

8

RL2.B

1

12

RL2.A

9

43

510

8

RL3.B

1

12

RL3.A

9

43

510

8

RL4.B

1

12

RL4.A

9

43

510

8

RL5.B

1

12

RL5.A

9

43

510

8

RL6.B

1

12

RL6.A

9

43

510

8

RL7.B

1

12

RL7.A

9 4351

0

8

RL8.B

1

12

RL8.A

9 4351

0

8

RL9.B

1

12

RL9.A

9 4351

0

8

RL10.B

1

12

RL10.A

9 4351

0

8

RL11.B

1

12

RL11.A

9 4351

0

8

RL12.B

1

12

RL12.A

9 4351

0

8

RL13.B

1

12

RL13.A

9 4351

0

8

RL14.B

1

12

RL14.A

9 4351

0

8

RL15.B

1

12

RL15.A

1

12

RL16.A

943 5

10 8

RL16.B

T1

ZXM62P02E6

1 2

3T2

PDTC114ET

R2

SMD

1k

R3SMD

4k7

GND

13V

ATUST

R4SMD33R/1W

C18

100n

GND

RL1 RL2 RL3 RL4 RL5 RL6 RL7 RL8 RL9 RL10 RL11 RL12 RL13 RL14 RL15 RL16

RL1RL2RL3RL4RL5RL6RL7

RL8RL9RL10RL11RL12RL13RL14RL15

RL16

RL1-RL16

FUJITSU NA12WMINI RELAY

GND

GNDGND

C141u

C151u

AWG20

5

PCB layouts

Top view

Bottom view

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Name Alias Shape Qnty Part info

C1 10P $R1206 1 C1206 2000V C0G

C2 20P $R1206 1 C1206 2000V C0G

C3 39P $R1206 1 C1206 2000V C0G

C4 39P $R1206 1 C1206 2000V C0G

C5 39P $R1206 1 C1206 2000V C0G

C6 82P $R1206 1 C1206 2000V C0G

C7 82P $R1206 1 C1206 2000V C0G

C8 160P $R1206 1 C1206 2000V C0G

C9 160P $R1206 1 C1206 2000V C0G

C10 330P $R1206 1 C1206 2000V C0G

C11 330P $R1206 1 C1206 2000V C0G

C12 620P $R1206 1 C1206 2000V C0G

C13 620P $R1206 1 C1206 2000V C0G

C14,C15 1U $R0805 2 C0805 1.0uF 16V X7R SAMSUNG

C16,C17,C18 100N $C0805 3 C0805 100nF 50V X7R SAMSUNG

CX1 ATUIN_#11 coax.pads 1 coax cable RG-404 length 8cm

CX2 ATUOUT_#10 coax.pads 1 coax cable RG-404 length 8cm

J1,J2,J3,J5 HDR_1 HOLE 4 screw M3x6 lock washer 3mm

JP1 ATU HDR1X10_2MM 1 HARWIN - M22-2512005 1/2 cut

L1 0.05UH COIL0.05 1 air wound inductor

L2 0.1UH COIL0.1 1 air wound inductor

L3 0.22UH T50-2 1 micrometals torroid core T50-2


L5 1UH T50-2 1 micrometals torroid core T50-2



R1 10K $R0805 1 R0805 10K 1%

R2 1K $R0805 1 R0805 1.0K 1% YAG/ASJ

R3 4K7 $R0805 1 R0805 4.7K 1% YAG/ASJ

R4 33R/1W R2512 1 R2512 33R 1% YAG/ASJ

RL1-RL16 NA-12W-K DPDT relay 16 NA-12W-K

T1 ZXM62P02E6 $TRA_SOT23_6 1 ZXM62P02E6

T2 PDTC114ET DIGITRANSISTOR 1 PDTC114ET

U1 MCP23017 SSOP28 1 MCP23017-E/SS

U3,U4 ULN2803 SO18 2 ULN2803ADW SMD

ATU parts list

Page 12: ATUPage 34: Schematics5: layoutPage 6

rgo one automatic antenna tuner l -...

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