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, 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 Max Gain Impedance Operating Return loss MHz dBi Temperature C min. dB 315 -5 50 -40 to +85 -10 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. 7.00 7.00 2.50 2.50 2.50 2.50 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 0 33 nH 10 nH Feed line 50 Ground Clearance Area (8.50 x 40.00 mm) all metallization should be removed from all PWB layers PWB Layout 0 33 nH Feed contact 10 nH Feed line 50 Tuning component Ground Clearance Area (8.50 x 40.00 mm) Antenna feed (fine tuning) all metallization should be removed from point (under all PWB layers Ground via hole Tuning component the antenna) (raw tuning) Feed contact Inductor for Matching component frequency fine Tuning component tuning, in this Antenna feed (fine tuning) case 0 ohm point (under 40 mm Ground via hole jumper, series Tuning component the antenna) (raw tuning) Inductor for Inductor for Matching component frequency rough frequency fine tuning, 33 nH, tuning, in this series case 0 ohm 40 mm jumper, series Inductor for S11 matching, Inductor for 10nH, shunt frequency rough tuning, 33 nH, Note: Exact matching and tuning series components value depend on Terminal Configuration and Antenna Dimensions application, board size, cover etc. Inductor for 4.00 S11 matching, Helix 10nH, shunt Note: Exact matching and tuning components value depend on application, board size, cover etc. 4.00 Helix 5.00 5.00 35.35 Scale 3:1 1 2 35.35 Antenna Features Scale 3:1 1 2 No. Terminal Terminal Name Dimensions 1 Feed Wire diameter terminal 0.8mm 2 Support Diameter 2.5mm, 4.15 25.00 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.. 4.15 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. 9.60 9.60 7.30 7.30 9.90 9.90 100 mm 100 mm