© 2014. All Rights Reserved.

Pulse Finland OyTakatie 690440 Kempele, FinlandTel: +358 207 935 500Fax: +358 207 935 501www.pulseeng.com/antennas

W3127 Datasheet version 1.2. ISM 433MHz Helical Antenna. (5/14).

ISM 433MHz Helical AntennaGround cleared under antenna, clearance area 8.50x40.00 mm. Pulse Part Number: W3127

Features - Plastic supported helical antenna- Size (helix): Length 35.35mm, ø 7mm- Low weight (1.8g)- Mounting on top of the PWB- Through hole mechanical support pegs- Feed contact by soldering via PWB hole- Tray packing- RoHS Compliant Product

Applications - Remote controls, toys etc.- 433MHz ISM Band Systems

Electrical specifications @ +25 °CNote: Electrical characteristics depend on test board (GP) size and antenna positioning on GP and Ground Clearance area size.

ISM 433MHzTypical performance (test board size 100x40 mm, PWB ground clearance area 8.50 x40.00 mm), tuning and matching circuit: tuning 12nH series, matching 6.8nH shunt for Pulse standard evaluation board.

Frequency Range[MHz]

433 – 435

Max Gain[dBi]

-2.9

Return lossmin. [dB]

-15

Impedance[Ω]

50

OperatingTemperature [°C]

-40 to +85

© 2014. All Rights Reserved.

Pulse Finland OyTakatie 690440 Kempele, FinlandTel: +358 207 935 500Fax: +358 207 935 501www.pulseeng.com/antennas

W3127 Datasheet version 1.2. ISM 433MHz Helical Antenna. (5/14).

ISM 433MHz Helical AntennaGround cleared under antenna, clearance area 8.50x40.00 mm. Pulse Part Number: W3127

Feed contact

Tuning component(fine tuning)

Tuning component(raw tuning)

Matching component

Feed line 50 Ω

Ground via hole

Ground Clearance Area (8.50 x 40.00 mm)all metallization should be removed from all PWB layers

40 mm

100

mm

ø 2.50

ø 2.50

25.004.15

4.00

ø 7.00

ø 5.00

9.60

9.90

7.30

35.35

Helix

21 Scale 3:1

0 Ω 12 nH

6.8 nH

Terminal Configuration

PWB Layout

Terminal Configuration and Antenna Dimensions

Feed contact

Tuning component(fine tuning)

Tuning component(raw tuning)

Matching component

Feed line 50 Ω

Ground via hole

Ground Clearance Area (8.50 x 40.00 mm)all metallization should be removed from all PWB layers

40 mm

100

mm

ø 2.50

ø 2.50

25.004.15

4.00

ø 7.00

ø 5.00

9.60

9.90

7.30

35.35

Helix

21 Scale 3:1

0 Ω 12 nH

6.8 nH

Antenna Features

No. Terminal Name

Terminal Dimensions

1 Feed terminal

Wire diameter 0.8mm

2 Support Diameter 2.5mm, length 2.6mm

Matching circuit needs to placed on PCB close to antenna feed terminal. Matching component values depend on device construction; size, surrounding mechanics, materials etc..

© 2014. All Rights Reserved.

Pulse Finland OyTakatie 690440 Kempele, FinlandTel: +358 207 935 500Fax: +358 207 935 501www.pulseeng.com/antennas

W3127 Datasheet version 1.2. ISM 433MHz Helical Antenna. (5/14).

ISM 433MHz Helical AntennaGround cleared under antenna, clearance area 8.50x40.00 mm. Pulse Part Number: W3127

Typical Electrical Characteristics (T=25 °C)Typical Return Loss S11/ impedance, Measured on the 100x40mm test board with tuning and matching circuit

Free space maximum gain, PWB ground clearance area 8.50 x 40.00 mm

Feed contact

Tuning component(fine tuning)

Tuning component(raw tuning)

Matching component

Feed line 50 Ω

Ground via hole

Ground Clearance Area (8.50 x 40.00 mm)all metallization should be removed from all PWB layers

40 mm

100

mm

ø 2.50

ø 2.50

25.004.15

4.00

ø 7.00

ø 5.00

9.60

9.90

7.30

35.35

Helix

21 Scale 3:1

0 Ω 12 nH

6.8 nH

Max

Gai

n [d

Bi]

W3127 Max Gain

Max Gain [dBi]

Freq [MHz]

0.00

-1.00

-2.00

-3.00

-4.00

-5.00

-6.00

-7.00

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

Cor

PRmDel

CH1Markers1. -21.132 dB 433 MHz2. -32.939 dB 434 MHz3. -21.458 dB 435 MHz

3 Jan 2008 14:56:23

ISM 433MHz

5 dB/REF 0 dBCH1 S11 log MAG

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

PRmDel

Cor

3 Jan 2008 14:56:36

ISM 433MHz

CH1 S11 1 U FS

1. 54.908 Ω 7.666 Ω 433 MHz2. 51.811 Ω -777.34 mΩ 471.76 pF 434.000 000 MHz3. 46.588 Ω -7.293 Ω 435 MHz

0 Ohm

6.8 nH

2

31

2

3

1428 430 432 434 436 438 440

Max

Gai

n [d

Bi]

W3127 Max Gain

Max Gain [dBi]

Freq [MHz]

0.00

-1.00

-2.00

-3.00

-4.00

-5.00

-6.00

-7.00

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

Cor

PRmDel

CH1Markers1. -21.132 dB 433 MHz2. -32.939 dB 434 MHz3. -21.458 dB 435 MHz

3 Jan 2008 14:56:23

ISM 433MHz

5 dB/REF 0 dBCH1 S11 log MAG

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

PRmDel

Cor

3 Jan 2008 14:56:36

ISM 433MHz

CH1 S11 1 U FS

1. 54.908 Ω 7.666 Ω 433 MHz2. 51.811 Ω -777.34 mΩ 471.76 pF 434.000 000 MHz3. 46.588 Ω -7.293 Ω 435 MHz

0 Ohm

6.8 nH

2

31

2

3

1428 430 432 434 436 438 440

Max

Gai

n [d

Bi]

W3127 Max Gain

Max Gain [dBi]

Freq [MHz]

0.00

-1.00

-2.00

-3.00

-4.00

-5.00

-6.00

-7.00

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

Cor

PRmDel

CH1Markers1. -21.132 dB 433 MHz2. -32.939 dB 434 MHz3. -21.458 dB 435 MHz

3 Jan 2008 14:56:23

ISM 433MHz

5 dB/REF 0 dBCH1 S11 log MAG

CENTER 434.000 000 MHz SPAN 50.000 000 MHz

PRmDel

Cor

3 Jan 2008 14:56:36

ISM 433MHz

CH1 S11 1 U FS

1. 54.908 Ω 7.666 Ω 433 MHz2. 51.811 Ω -777.34 mΩ 471.76 pF 434.000 000 MHz3. 46.588 Ω -7.293 Ω 435 MHz

0 Ohm

6.8 nH

2

31

2

3

1428 430 432 434 436 438 440

© 2014. All Rights Reserved.

Pulse Finland OyTakatie 690440 Kempele, FinlandTel: +358 207 935 500Fax: +358 207 935 501www.pulseeng.com/antennas

W3127 Datasheet version 1.2. ISM 433MHz Helical Antenna. (5/14).

ISM 433MHz Helical AntennaGround cleared under antenna, clearance area 8.50x40.00 mm. Pulse Part Number: W3127

XZ-PLANE

Typical Free space Radiation Patterns

ZY-PLANE

XY-PLANE