LA.02

LA.02 2.4GHz Embedded Loop Chip Antenna Part No: LA.02 Description: 1dBi 2400MHz to 2500MHz Wi-Fi/Bluetooth/Bluetooth LE/ ZigBee Features: 8*2*2mm Ceramic Antenna Surface Mount Low Profile Peak gain 1dBi 50 Ohm Impedance Components can be mounted on opposite side of board to the antenna RoHS & REACH Compliant SPE-15-8-40-C 1. Introduction 3 2. Specifications 5 3. Antenna Characteristics 6 4. Radiation Patterns 8 5. Mechanical Drawing – Antenna 10 6. Mechanical Drawing – Evaluation Board 13 7. Soldering Conditions 14 8. Packaging 15 9. Changelog 17 Taoglas makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Taoglas reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without express permission is strictly prohibited. SPE-15-8-40-C www.taoglas.com 2 1. Introduction 1. Introduction 1. Introduction 1. Introduction 1. 1. 1. 1. The LA.02 is a 2.4GHz embedded loop chip antenna that has best in class efficiency, 66% on center frequency. It’s a miniature SMD ceramic component, designed to be mounted directly on the edge of the main device PCB and is suitable especially for very small space requirements for Bluetooth LE, Wi-Fi, 802.11 applications. The LA.02 uses this main PCB ground plane to increase antenna efficiency, requiring minimum groundclearance around the antenna. The opposite side of the board on which the antenna is mounted does not need ground-clearance, allowing more space for components or signal routing. This antenna is delivered on tape and reel. Introduction Introduction Some frequency offset may happen as is normal with antennas embedded devices, so the antenna can be tuned for different PCB sizes and enclosures by simply changing the value of the matching circuit. Please contact your regional Taoglas sales office for support. Introduction 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 free-space 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. Introduction 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 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. SPE-15-8-40-C www.taoglas.com 3 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. This antenna can be mounted with no performance degradation in either orientation as long as the antenna is soldered correctly via Surface mounting. Please see the integration instructions section for further detail regarding the optimum way to integrate this antenna into your device. For further optimization to customer-specific device environments and for support to integrate and test this antennas performance in your device, contact your regional Taoglas Customer Services Team. Applications: Telematics devices Bluetooth LE Wearables Bluetooth Headsets Hand-held devices when Bluetooth/Wi-Fi functions are needed, e.g., smart phone. IEEE802.11 b/g ZigBee Wireless PCMCIA cards or USB dongle SPE-15-8-40-C www.taoglas.com 4 2. Specifications 3. Antenna Characteristics2. Specifications Antenna Frequency (MHz) 3. 2400-2500 MHz Antenna Characteristics Efficiency (%) 80 x 40 mm Ground Plane 66% (Centre Frequency) Peak Gain (dBi) 4. Antenna Radiation Patterns3.Antenna1 dBi (Typ.) 80 x 40 mm Ground Plane VSWR Characteristics2. 3. Specifications 2 max (Centre Frequency) Impedance (Ω) 50Ω Polarization Linear Bandwidth Antenna Characteristics2. 100MHz min. Specifications Mechanical 3. Dimensions (mm) 8.0 x 2.0 x 2.0 Material Ceramic Weight (g) 0.11 Antenna Characteristics Environmental 4. Temperature Range -40°C to 85°C Antenna Radiation Patterns3.Antenna Storage Temperature -40°C to 105°C 0  20 ppm @-20ºC to +80ºC Temperature Coefficient（τf) Characteristics Recommended Reel Storage Condition 5°C to 40°C Relative Humidity 20% to 70% Moisture Sensitivity Level 3 (168 Hours) 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns3.Antenna Characteristics 4. Antenna Radiation Patterns3.Antenna Characteristics2. SPE-15-8-40-C Specifications www.taoglas.com 5 3. Antenna Characteristics 3.1 4. Return Loss Antenna Radiation Patterns3.Antenna Characteristics 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns3.Antenna Characteristics 3.2 4. Efficiency Antenna Radiation Patterns3.Antenna Characteristics 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns3.Antenna Characteristics 4. Antenna Radiation Patterns3.Antenna SPE-15-8-40-C www.taoglas.com 6 3.3 Average Gain 3.4 Peak Gain SPE-15-8-40-C www.taoglas.com 7 4. 4. Radiation Patterns 4.1 Test Setup – Antenna on Evaluation Board Antenna Radiation Patterns 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns Y X 4. Antenna Radiation Patterns 4. Antenna Radiation Patterns Z Z X SPE-15-8-40-C Y www.taoglas.com 8 4.2 2D Radiation Pattern 2400-2500 MHz 5925MHz XZ Plane XY Plane X Z Y 4.3 YZ Plane Y Z X 3D Radiation Pattern 2450 MHz 5925MHz SPE-15-8-40-C www.taoglas.com 9 5. Mechanical Drawing – Antenna 5.1 Antenna Dimension and Drawing 6. Packaging5. 6. Packaging Mechanical Drawing Unit: mm 7. Application Note6. Packaging5. Mechanical Drawing 5.2 Antenna Footprint Top Copper: 6. Packaging5. Mechanical Drawing 6. Packaging 7. Application Note6. Packaging Top Solder Paste: 7. Application Note 7. Application Note6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing 6. Packaging5. SPE-15-8-40-C Mechanical Drawing www.taoglas.com 10 Top Solder Mask: Composite Diagram: *Taoglas is able to provide CAD drawing file to customers for evaluation. SPE-15-8-40-C www.taoglas.com 11 5.2 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 evaluation board (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 to as close as possible to 50 Ohm impedance 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. Contact your regional Taoglas sales office for support. SPE-15-8-40-C www.taoglas.com 12 6. Mechanical Drawing – Evaluation Board 6. Packaging5. 6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing Mechanical Drawing 6. Packaging5. 6. Packaging Mechanical Drawing Footprint on Taoglas Evaluation board (Unit: mm) 7. Application Note6. Packaging 7. Application Note 7. Application Note6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing 6. Packaging5. SPE-15-8-40-C Mechanical Drawing www.taoglas.com 13 7. Soldering Conditions Typical Soldering profile for lead-free process: 6. Packaging5. Mechanical Drawing Phase 6. Pb-Free Assembly (SnAgCu) PREHEAT Packaging -Temperature Min(Tsmin) -Temperature Max(Tsmax) -Time(ts) form (Tsmin to Tsmax) 150℃ 200℃ 60-120 seconds RAMP-UP Avg. Ramp-up Rate (Tsmax to TP) 3℃/second(max) -Temperature(TL) -Total Time above TL (t L) -Temperature(TP) -Time(tp) Rate 217℃ 30-100 seconds 260℃ 5-10 second 6℃ / second max. REFLOW 7. Profile features Application Note6. Packaging5. PEAK Drawing RAMP-DOWN Mechanical Time from 25℃ to Peak Temperature 8 minutes max. Composition of solder paste 96.5Sn/3Ag/0.5Cu Solder Paste Model SHENMAO PF606-P26 6. Packaging5. Mechanical Drawing 6. Packaging 7. Application Note6. Packaging 7. Application Note 7. Application Note6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing 6. Packaging5. SPE-15-8-40-C Mechanical Drawing www.taoglas.com 14 9. Packaging 6. Packaging5. 6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing Mechanical Drawing 6. Packaging5. Mechanical Drawing 6. Packaging 7. Application Note6. Packaging 7. Application Note 7. Application Note6. Packaging 7. Application Note6. Packaging5. Mechanical Drawing 6. Packaging5. SPE-15-8-40-C Mechanical Drawing www.taoglas.com 15 Unit: mm SPE-15-8-40-C www.taoglas.com 16 Changelog for the datasheet SPE-15-8-040 – LA.02 Revision: C (Current Version) Date: Changes: Changes Made by: 2021-11-1 Format Change, MSL Erik Landi Previous Revisions Revision: B Date: Changes: Changes Made by: 2021-05-18 Amended Footprint drawing Erik Landi Revision: A (Original First Release) Date: Notes: Author: SPE-15-8-40-C 2016-06-17 Initial Release STAFF www.taoglas.com 17 www.taoglas.com SPE-15-8-40-C © Taoglas 18 www.taoglas.com