W3126 Datasheet version 1.0 ISM 315MHz Helical Antenna. (05/14) ISM 315MHz Helical Antenna Ground cleared under antenna, clearance area 8.50 x 40.00 mm. Pulse Part Number: W3126 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. - 315MHz ISM Band Systems Electrical specifications @ +25 °C Note: Electrical characteristics depend on test board (GP) size and antenna positioning on GP and Ground Clearance area size. ISM 315MHz Typical performance (test board size 100x40 mm, PWB ground clearance area 8.50 x40.00 mm), tuning and matching circuit: tuning 33nH series, matching 10nH shunt for Pulse standard evaluation board. Frequency Range [MHz] Max Gain [dBi] Return loss min. [dB] Impedance [Ω] Operating Temperature [°C] 315 -5 -10 50 -40 to +85 Pulse Finland Oy Takatie 6 90440 Kempele, Finland Tel: +358 207 935 500 Fax: +358 207 935 501 www.pulseeng.com/antennas © 2014. All Rights Reserved. W3126 Datasheet version 1.0 ISM 315MHz Helical Antenna. (05/14) ISM 315MHz Helical Antenna Ground cleared under antenna, clearance area 8.50 x 40.00 mm. Pulse Part Number: W3126 Terminal Configuration PWB Layout Feed line 50 Ω 100 mm Ground Clearance Area (8.50 x 40.00 mm) all metallization should be removed from all PWB layers Feed contact Tuning component (fine tuning) Feed line 50 Ω Tuning component (raw tuning) Feed contact Matching component Tuning component (fine tuning) Inductor for frequency fine tuning, in this Antenn case 0 ohm point (u jumper,the series ante 40 mm Ground via hole Tuning component (raw tuning) Antenna feed point (under the antenna) 100 mm Ground Clearance Area (8.50 x 40.00 mm) all metallization should be removed from all PWB layers Ground via hole InductorInducto for frequen frequency roug tuning, tuning, 33 nH, series case 0 o jumper, Inductor for S11 matching, Inducto 10nH, shunt frequen Matching component 40 mm tuning, series Terminal Configuration and Antenna Dimensions 4.00 Helix 7.30 9.90 4.00 Helix 9.60 Inducto S11 ma 10nH, s ø 5.00 9.90 7.30 50 2. 50 2. Scale 3:1 2 2 Support Diameter 2.5mm, length 2.6mm 4.15 50 Wire diameter 0.8mm 2. Feed terminal ø 1 50 Terminal Dimensions 2. Terminal Name ø No. 0 7.0 ø ø 35.35 Antenna Features ø 5.00 ø Scale 3:1 2 1 0 1 7.0 9.60 ø 35.35 25.00 Matching circuit needs to placed on PCB close to antenna feed terminal. Matching component values depend on device construction; size, materials etc.. 4.15 surrounding mechanics, 25.00 Pulse Finland Oy Takatie 6 90440 Kempele, Finland Tel: +358 207 935 500 Fax: +358 207 935 501 www.pulseeng.com/antennas © 2014. All Rights Reserved. W3126 Datasheet version 1.0 ISM 315MHz Helical Antenna. (05/14) ISM 315MHz Helical Antenna Ground cleared under antenna, clearance area 8.50 x 40.00 mm. Pulse Part Number: W3126 Typical Electrical Characteristics (T=25 °C) 0Ω 33 nH Typical Return Loss S11/ impedance, Feed line 50 Ω Ground Clearance Area (8.50 xon 40.00 mm)100x40mm Measured the test board with tuning and matching circuit ISM ISM315MHz 315MHz 2323 OctOct 2007 2007 06:49:57 06:49:57 Ground via hole CH1 CH1 S11 S11 log log MAG MAG 5 dB/REF 5 dB/REF 0 dB 0 dB 100 mm all metallization should be removed from all PWB layers CH1Markers CH1Markers 1. 1. -16.902 -16.902 dBdB315 315 MHz MHz 2. 2. -14.812 -14.812 dBdB314 314 MHz MHz 3. 3. -14.642 -14.642 dBdB316 316 MHz MHz PRm PRm DelDel ISM ISM315MHz 315MHz 1. 1. 61.861 61.861 Ω Ω -10.211 -10.211 ΩΩ 2323 OctOct 2007 2007 06:50:10 06:50:10 315 315 MHz MHz Antenna feed point (under 2. 2. 70.941 70.941 Ω Ω 5.3633 5.3633 ΩΩ the antenna) 3. 3. 49.076 49.076 Ω Ω -18.451 -18.451 ΩΩ CH1 CH1 S11 S11 1 U1 FS U FS PRm PRm DelDel 40 mm CorCor 10 nH CorCor 471.76 471.76 pFpF 314 314 MHz MHz 316 316 MHz MHz Inductor for frequency fine tuning, in this case 0 ohm jumper, series Inductor for frequency rough tuning, 33 nH, series Inductor for S11 matching, 10nH, shunt 11 2323 Note: Exact matching and tuning 3 3components value depend on 33 nH 10 nH 7.30 0Ω 9.90 4.00 CENTER CENTER 315.000 315.000 000 000 MHz MHz 11 22 SPAN SPAN 100.000 100.000 000 000 MHz MHz CENTER CENTER 315.000 315.000 000 000 MHz MHz application, board size, cover etc. SPAN SPAN 100.000 100.000 000 000 MHz MHz ø 5.00 ø 7.0 Matching Circuit Details 0 35.35 0 Ohm 0 Ohm 6.8 6.8 nH nH 2 Antenna feed point (under the antenna) Scale 3:1 ø ø 50 2. 50 2. Inductor for frequency fine tuning, in this case 0 ohm jumper, series Inductor for frequency rough tuning, 33 nH, series Inductor for S11 matching, 10nH, shunt 4.15 25.00 Note: Exact matching and tuning components value depend on application, board size, cover etc. .00 Pulse Finland Oy ø 5.00 Takatie 6 7.0 90440 Kempele, Finland Tel: +358 207 935 500 Fax: +358 207 935 501 0 www.pulseeng.com/antennas © 2014. All Rights Reserved. W3126 Datasheet version 1.0 ISM 315MHz Helical Antenna. (05/14) ISM 315MHz Helical Antenna Ground cleared under antenna, clearance area 8.50 x 40.00 mm. Pulse Part Number: W3126 Typical Free space Radiation Patterns Pulse Finland Oy Takatie 6 90440 Kempele, Finland Tel: +358 207 935 500 Fax: +358 207 935 501 www.pulseeng.com/antennas © 2014. All Rights Reserved.