CA.25

SPECIFICATION Part No. : CA.25 Product Name : 2.4/5 GHz Dual-Band Wi-Fi Dielectric Loop Antenna Feature : Smallest 2400MHz to 2500MHz/5150MHz to 5850MHz Dual-Band SMT Type Antenna Ultra Low profile 3.05mm x 1.6mm x 0.55mm Supports IEEE 802.11 a/b/g/n and ac Dual-Band WIFI systems Linear Polarization Tuned on 40*80mm ground plane RoHS Compliant SPE-15-8-005/B/WY Page 1 of 24 1. Introduction The CA.25 is a super small SMT ceramic loop antenna for 2400MHz to 2500MHz/ 5150MHz to 5850MHz dual band that includes Bluetooth, WIFI, Zigbee, and ISM applications. The CA.25 has a peak gain of 1.0 dBi and 1.5 dBi at 2.4GHz and 5.5GHz, respectively, with an efficiency of at least 60%. This antenna is delivered on tape and reel. The CA.25 antenna has an ultra-low profile form factor of 3.05mm x 1.6mm x 0.55mm and allows use on extremely thin devices while still maintaining excellent RF performance characteristics. All that is needed is a 50 Ohm transmission line to the module. Typical applications include:  USB dongles  Tablets  Home and industrial in-wall WIFI automation  Hand-held devices Many module manufacturers specify peak gain limits for any antennas that are to be connected to that module. Those peak gain limits are based on freespace conditions. In practice, the peak gain of an antenna tested in free-space can degrade by at least 1 or 2dBi when put inside a device. So ideally you should go for a slightly higher peak gain antenna than mentioned on the module specification to compensate for this effect, giving you better performance. Upon testing of any of our antennas with your device and a selection of appropriate layout, integration technique, or cable, Taoglas can make sure any SPE-15-8-005/B/WY Page 2 of 24 of our antennas’ peak gain will be below the peak gain limits. Taoglas can then issue a specification and/or report for the selected antenna in your device that will clearly show it complying with the peak gain limits, so you can be assured you are meeting regulatory requirements for that module. For example, a module manufacturer may state that the antenna must have less than 2dBi peak gain, but you don’t need to select an embedded antenna that has a peak gain of less than 2dBi in free-space. This will give you a less optimized solution. It is better to go for a slightly higher free-space peak gain of 3dBi or more if available. Once that antenna gets integrated into your device, performance will degrade below this 2dBi peak gain due to the effects of GND plane, surrounding components, and device housing. If you want to be absolutely sure, contact Taoglas and we will test. Choosing a Taoglas antenna with a higher peak gain than what is specified by the module manufacturer and enlisting our help will ensure you are getting the best performance possible without exceeding the peak gain limits. Custom tuned versions for different ground-planes and housing environments can be made subject to a minimum order quantity. Contact your regional Taoglas sales office for support to integrate and test this antenna performance in your device. CA.25 also has GPS/Glonass/Beidou functionality, if client follows our specific matching circuit components on their main board, it can be re-tuned to work as an embedded GNSS antenna. Please kindly refer to our specification AGGBLA.03.07.0095A. SPE-15-8-005/B/WY Page 3 of 24 2. Specification Table Parameter Working Frequency Specification 2400~2500 MHz 5150~5850 MHz VSWR 3.0 3.0 Peak Gain 0.5 dBi 3.3 dBi Efficiency(Peak) 60% 70% Polarization Linear Impedance 50 Ohm Weight 9mg Dimensions 3.05 x 1.6 x 0.55 mm Operating Temperature -40 to +85C * These values are based on our standard 40mmx80mm test board. Actual electrical values will change depending on ground plane size, shape, mounting position, matching circuit design, and surrounding environment. SPE-15-8-005/B/WY Page 4 of 24 3. Test Setup Y X Z SPE-15-8-005/B/WY Page 5 of 24 4. Electrical Specifications 4.1 Return Loss Return Loss S11(dB) 2400MHz 2450MHz 2500MHZ 5150MHz 5550MHz 5850MHz -6.0 -11.0 -9.5 -9.1 -15.9 -11.6 SPE-15-8-005/B/WY Page 6 of 24 4.2 Efficiency WLAN 2400MHz 2450MHz 2500MHZ 5150MHz 5550MHz 5850MHz Efficiency 32.30% 56.37% 59.48% 49.10% 61.01% 49.10% SPE-15-8-005/B/WY Page 7 of 24 4.3 Average Gain WLAN Average (dBi) 2400MHz 2450MHz 2500MHZ 5150MHz 5550MHz 5850MHz -4.90 -2.48 -2.25 -3.08 -1.93 -3.08 SPE-15-8-005/B/WY Page 8 of 24 4.4 Peak Gain WLAN 2400MHz 2450MHz 2500MHZ 5150MHz 5550MHz 5850MHz Peak (dBi) -1.39 0.47 0.59 0.96 2.64 2.07 SPE-15-8-005/B/WY Page 9 of 24 4.5 2D Radiation Pattern XY-Plane X 0 330 5 30 -5 -15 300 60 -25 -35 270 90 Y -45 2400MHz 240 120 210 2450MHz 150 2500MHz (dBi) 180 X 0 330 5 30 -5 -15 300 60 -25 -35 270 90 -45 Y 4900MHz 5150MHz 240 120 5350MHz 5650MHz 210 150 180 5750MHz (dBi) 5850MHz SPE-15-8-005/B/WY Page 10 of 24 XZ-Plane Z 0 330 5 30 -5 -15 300 60 -25 -35 270 90 X -45 2400MHz 240 120 2450MHz 210 150 180 2500MHz (dBi) Z 0 330 5 30 -5 -15 300 60 -25 -35 270 90 -45 X 4900MHz 5150MHz 240 120 5350MHz 5650MHz 210 150 180 5750MHz (dBi) 5850MHz SPE-15-8-005/B/WY Page 11 of 24 YZ-Plane Z 0 330 5 30 -5 -15 300 60 -25 -35 270 90 Y -45 2400MHz 240 120 2450MHz 210 150 180 2500MHz (dBi) Z 0 330 5 30 -5 -15 300 60 -25 -35 270 90 -45 Y 4900MHz 5150MHz 240 120 210 5350MHz 5650MHz 150 5750MHz 180 (dBi) 5850MHz SPE-15-8-005/B/WY Page 12 of 24 4.6 3D Radiation Pattern 2450MHz SPE-15-8-005/B/WY Page 13 of 24 5. Footprint Layout Guide 5.1 Top Copper SPE-15-8-005/B/WY Page 14 of 24 5.2 Top Solder Paste SPE-15-8-005/B/WY Page 15 of 24 5.3 Top Solder Mask SPE-15-8-005/B/WY Page 16 of 24 5.4 Composite Diagram SPE-15-8-005/B/WY Page 17 of 24 5.5 Matching Circuit Like all antennas, surrounding components, enclosures, and changes to the GND plane dimensions can alter performance. A pi-matching network like the one shown below is required in case adjustments need to be made. The antenna EVB has a similar matching network. The components on the EVB are a good starting point for a new design, but will need to be adjusted upon integration for best performance. The zero ohm resistor is needed for the ability to solder down a coax pigtail to make measurements with a vector network analyzer. Antenna 0 Ohm Resistor S1 Transmission Line S3 S2 SPE-15-8-005/B/WY Page 18 of 24 6. Antenna Drawings 6.1 Antenna Dimension SPE-15-8-005/B/WY Page 19 of 24 6.2 Antenna with Evaluation Board SPE-15-8-005/B/WY Page 20 of 24 6.3 Footprint on Evaluation Board SPE-15-8-005/B/WY Page 21 of 24 7. Packing (1) Blister tape to IEC 286-3，polyester. (2) Pieces /tape：5000 pcs (Vacuum packing). (3) Pieces /Carton-Inside：10000 pcs. (4) Pieces /Carton-Outside：50000 pcs. SPE-15-8-005/B/WY Page 22 of 24 8. Recommended Reflow Soldering Profile The CA.25 loop antenna can be assembled following Pb-free assembly. According to the Standard IPC/JEDEC J-STD-020C, the temperature profile suggested is shown below: Phase PREHEAT RAMP-UP Profile features Pb-Free Assembly(SnAgCu) Temperature Min(Tsmin) 150℃ Temperature Max(Tsmax) 200℃ Time(ts) from(Tsmin to Tsmax) 60-120 seconds Avg. Ramp-up Rate(Tsmax to TP) REFLOW PEAK RAMP-DOWN 3℃ / second(max) Temperature(TL) 217℃ Total Time above TL(t L) 30-100 seconds Temperature(TL) 260℃ Time(tp) 5-10 second Rate 6℃ / second max. Time from 25℃ to Peal Temperature 8 minutes max. Composition of solder paste 96.5Sn/3Ag/0.5Cu Solder Paste Model SHENMAO PF606-P26 Note： Temperature measurement point is on top surface of the component. Damage can result if recommended temperature is exceeded. SPE-15-8-005/B/WY Page 23 of 24 Soldering condition : Soldering iron temperature 270±10 ℃. Apply preheating at 120℃for 2-3 minutes. Finish soldering for each terminal within 3 seconds, if soldering iron over temperature 270±10 ℃ for 3 seconds, component surface peeling or damage may occur. Soldering iron cannot dissipate electricity. SPE-15-8-005/B/WY Page 24 of 24