SL1250 GeoHelix(R) Passive GPS Antenna Product Description Built on patented PowerHelix(R) filtering antenna technology, the SL1250 GPS antenna provides high performance in difficult GPS applications using a quadrafilar helix design. The SL1250 antenna is ideal in applications where: * the device is handheld, body-worn, or otherwise surrounded by high-dielectric materials that would de-tune conventional antennas; * the antenna is tightly integrated with other antennas, e.g., Bluetooth(R)/GPS receivers or GPS/GSM mobile phones; * there are tight constraints on the size of the device or the amount of space allocated to ground planes; * the orientation of the device is random; or * the antenna will be embedded in the device. The SL1250 antenna is balanced, which isolates it from the device and enables the antenna to reject common mode noise resident on the device ground plane. The construction and materials of the antenna constrain its near-field to a very small volume, therefore materials near the antenna have negligible de-tuning effects and the antenna maintains its pattern and efficiency in the presence of dielectric loading. As a dielectrically-loaded antenna, the SL1250 acts as its own filter, attenuating signals from common GSM and ISM frequencies by as much as 30dB without external filtering. The SL1250 is similar in size to the SL1200, using the same ceramic element, but has a number of enhancements over the SL1200. These include: * Improved antenna ruggedness. The new feed system requires less mechanical support and is capable of withstanding higher stresses * Simplified interconnection system. Antenna can be connected using either simple contacts or hot air soldered to the product board Specifications Minimum Part Number Typical SL1251 (Embedded) or SL1252 (Low Frequency) 1575.42 Embedded Frequency Integrated Gain(on PCB-see page 4) MHz -3.0dBic dBic @ zenith >135 Degrees 15 MHz Beamwidth Bandwidth (3dB) <1.5 Axial Ratio(Free Space) <2.0:1 VSWR @Zenith 2.3:1 50 Impedance -40 +20 +85 C 10 (diameter) x 17.75 (length) mm 7.0 grams Weight Sarantel UK SL1250 Product Specification v5 Iss 12-12 info@sarantel.com Sarantel Propriety Information www.sarantel.com Each Right-hand circular polarized Polarization Element Dimensions Unit Quadrafilar Helix Type Operating Temperature Maximum 1 Specifications subject to change v5 Iss 12-12 (c) Sarantel Ltd. 2012 Styron Sleeve for Embedding Radiating Section Balun Gnd RF(50) Gnd Radiation Pattern (dBic) The SL1250 GPS antenna provides similar performance to the SL1200 (GeoHelix-P2) antenna, with typical peak gain of -3dBic, excellent beamwidth and strong circular polarization. The strength of the PowerHelix antenna technology is its immunity to de-tuning in the presence of dielectric loading, like human tissues. GeoHelix antennas retains efficiency and polarization near the human body. Conventional antennas lose 5-10dB of gain in similar circumstances. Though it will not electrically couple with a ground plane, the SL1250 antenna can be expected to increase efficiency by up to 30% when mounted over a ground plane due to near-field signal reflections. Configuration and orientation of the ground plane with respect to the antenna will vary results, but efficiency will not decrease. Typical Impedance The SL1250 antenna is optimized for 50 impedance to simplify the matching process. The Smith chart showing a typical impedance plot of the antenna has been normalized to 1. The resonant frequency of the antenna is shown at the marker, and the bandwidth of the antenna is shown by the dimensions of the loop. The red circle shows the VSWR<=2.3:1 impedance mask. As with the pattern chart, it is important to note the immunity of the antenna to loading factors in close proximity. It can be seen that the impedance of the antenna changes very little until a phantom hand is placed inside a radius of 10mm from the antenna. SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 2 Return Loss Immunity from bio-loading effects can be demonstrated effectively through the S11 plot. While some change in match is observed as a phantom hand is moved closer to the radiating section of the antenna, minimal de-tuning occurs. The SL1250 antenna also demonstrates a sharp filtering response in bands near the desired resonant frequency. Filtering Response SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 3 Embedding Information The SL1250 antenna is available with two frequency options, the SL1251 with a free space frequency of 1603.5MHz and the SL1252 with a free space frequency of 1593.5MHz, to suit various embedding requirements. The SL1251 antenna is typically designed to be embedded in a device with the plastic tuning sleeve to ensure onfrequency performance. Ground planes within 5mm of the antenna radiating section can affect the performance of the antenna. The SL1252 antenna is designed to be typically mounted externally either with the radome available from Sarantel or within the customers own radome. See the Ordering Guide section of this document for details on which version of the antenna should be ordered to suit specific requirements. Additional mechanical support should be provided to hold the antenna in place. For further information on embedding either the SL1251 or SL1252 antennas please refer to the Mechanical Integration Guideline documents available on the Sarantel website Ordering Guide for the SL1250 antenna Part Number Description SL1251 GeoHelix(R) P2.5 Emb Ant SL1251SF GeoHelix(R) P2.5 Emb Ant+Sleeve MOQ 800 800 Pack Size 400 400 SL1252 SL1252SF SL1252R 800 800 800 400 400 400 GeoHelix(R) P2.5 LF Ant GeoHelix(R) P2.5 LF Ant+Sleeve GeoHelix(R) P2.5 LF Ant+Radome Notes 1. Orders placed for below MOQ or not in multiples of pack quantities will be subject to a $50 handling fee 2. For further guidance on selecting the correct part number please contact Sarantel distributors or info@sarantel.com SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 4 REV DATE SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information DETAIL 5 ALL DIMENSIONS IN MILLIMETRES OTHER TOLERANCES TO BE STATED ON DRAWING DIMENSIONS WITH TWO DECIMAL PLACES 0.05 DIMENSIONS WITH ONE DECIMAL PLACE 0.1 SARANTEL CONFIDENTIAL TEL +44 01933 670560 FAX +44 01933 401155 2 RYLE DRIVE PARK FARM IND EST WELLINGBOROUGH NN8 6BA SARANTEL L.HARDY ENG.CHECK 2:1 DATE ISSUE PROD.APPROVE DATE 125110300 DRG No. SCALE DATE 1 SHEET SL1251 ANTENNA DATE ENG.APPROVE 19/06/2012 DRN TITLE REMOVE ALL BURRS AND SHARP EDGES DIMENSIONS WITH NO DECIMAL PLACE 0.5 TOLERANCES USED ON FIRST ANGLE PROJECTION FINISH MATERIAL A4 DO NOT SCALE. IF IN DOUBT - ASK PERMISSION OF SARANTEL LTD. AND SHALL NOT BE LENT, COPIED OR IN ANY WAY REPRODUCED WITHOUT THE WRITTEN 125110300 THIS DRAWING, INCLUDING ANY PATENTED OR PATENTABLE FEATURES IS COPYRIGHT DRG No. Mechanical Drawings - SL1250 Mechanical Drawings - 2010055 Sleeve SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 6 SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 7 $ % & ' ( ) * 9-.7)&3,1*5749*(9.43 '1&(0 7*24;*&11':778 &3)8-&75*),*8 +.3.8- $ $ 5*72.88.434+8&7&39*119) P ' :3.9<*3)*154.39 7>1*)7.;* 5&70+&72.3)*89 <*11.3,'474:,33&6 5MTSJ +F] :8*)43 49-*7941*7&3(*894'*89&9*)43)7&<.3, &11).2*38.438.32.11.2*97*8 219 574949>5* 574):(9.43 )7,3T 8(&1* .88:* 574)&5574;* *3,&5574;* *3,(-*(0 8-**9 )&9* )&9* )&9* )&9* 81&39*33& 7&)42* )*9&.1 )&9* 57*574) )73 9.91* .88:* $$ 5 5 )43498(&1*.+.3)4:'9&80 ).2*38.438<.9-9<4)*(.2&151&(*8l ).2*38.438<.9-43*)*(.2&151&(*l ).2*38.438<.9-34)*(.2&151&(*l 941*7&3(*8 P &3)8-&11349'*1*39(45.*)47.3&3><&>7*574):(*)<.9-4:99-*<7.99*3 (>(414> (-+ 2&9*7.&1 9-.8)7&<.3,.3(1:).3,&3>5&9&39*)475&9*39&'1*+*&9:7*8.8(45>7.,-9 + )7,3T $ % & ' ( ) * + Mechanical Drawings - 120421202 Radome RoHS Compliance Statement SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 8 About Sarantel Application Support Sarantel designs and manufactures dielectrically loaded antennas based on patented PowerHelix(R) filtering antenna technology. Sarantel's antennas are ideal for applications in which the radio device is small, handheld, or body-worn, or in devices with multiple transceivers and high levels of common mode noise. Sarantel antennas can be mounted externally or easily embedded within a device. Sarantel are committed to our customers' success, and so offer a variety of support options for customers designing RF products. Check the Sarantel Applications Centre for the latest production specifications, technical notes, and application guides for solutions to the most common antenna integration issues. https://applicationcentre.sarantel.com GeoHelix(R), PowerHelix(R), and the Sarantel logo are registered trademarks of Sarantel Ltd. Contact our applications support group by email at info@ sarantel.com for detailed product specifications, including mechanical drawings, surface mount pad layout, embedding recommendations, and other application questions not answered in the technical literature. Contact Sarantel Sarantel Ltd. (HQ) 2 Ryle Drive, Park Farm South Wellingborough, NN8 6BA United Kingdom Ph: +44 1933 670564 Fax: +44 1933 401155 Email: info@sarantel.com Web: www.sarantel.com For further support options, please contact your local sales representative at www.sarantel.com/wheretobuy. Global Distributors & Representatives www.sarantel.com/wheretobuy Sarantel strongly believes in the value of intellectual property and the right of entrepreneurs to protect what they have created. Sarantel demonstrates its commitment to this principle by continuously developing its technology and then filing patents in a number of regions around the world. Additionally, Sarantel is constantly filing new patent applications and has a substantial portfolio of pending applications. A list of Sarantel's granted patents; Australia; 707488, 716542, 720873, 769570, 2004223229 Austria; 0791978 Brazil; PI9508769-9 Canada; 2198318, 2198375, 2245882, 2250790, 2272389, 2357041, 2373941, 2521493 China; ZL00136656.4, ZL00803562.8, ZL00808144.1, ZL95195772.4, ZL97181567.4, ZL97193099.6, ZL97194742.2, ZL99816387.2 Denmark; 0777922, 1088367 Finland; 0791978, 0876688, 0935826, 0941557, 1088367, 1098392, 1147571, 1153458, 1196963, 1609213 France; 0777922, 0791978, 0876688, 0935826, 0941557, 1081787, 1088367, 1098392, 1147571, 1153458, 1196963, 1609213 Germany; 60003157.8-0, 60029538.9-08, 60034042.2-08, 602004010085.4-08, 69535431.0-08, 69722590.9-0, 69723093.7-0, 69726177.8-0, 69730369.1-08, 69923558.8-08, 69930407.5-08 India; 193515, 193751, 193929, 195085, 206740 Italy; 0777922, 0791978, 0876688, 0935826, 1081787, 1088367, 1153458, 1196963 Japan; 3489684, 3489775, 3923530, 3946955, 4052800, 4057612, 4077197, 4099309, 4147260, 4159749, 4188412 Malaysia; MY-112473-A, MY-119077-A, MY-119465-A, MY-123075-A Mexico; 199890, 205239, 213947, 220048, 213633, 232437, 232438, 231633, 259577 Netherlands; 0791978, 1081787 New Zealand; 291852, 334614 Philippines; 1-1995-51169, 1-1997-55284, 1-1997-55978, 1-1997-58557, 11999-03167 Russia; 2173009, 2210146, 2339131 Singapore; 37745, 54891, 56480, 116791, 131698 South Korea; 348441, 366071, 446790, 458310, 523092, 625638, 650620, 650621, 650622, 663873, 667216, 667221, 709688, 767329 Spain; 0777922, 0791978, 1088367, 1196963 Sweden; 0777922, 0791978, 0876688, 0935826, 0941557, 1081787, 1088367, 1098392, 1147571, 1153458, 1196963, 1609213 Switzerland; 0791978, 1081787, 1196963 Taiwan; 094978, 108488, 123671, 144801, 156702, 285980, M 312023 Thailand; 17812, 19360, 19570, 23745 United Kingdom; 1081787, 1147571, 2292257, 2292638, 2309592, 2310543, 2311675, 2321785, 2326532, 2326533, 2338605, 2351850, 2356086, 2367429, 2383901, 2399948, 2419037 USA; 5854608, 5859621, 5945963, 5963180, 6181297, 6184845, 6300917, 6369776, 6424316, 6552693, 6690336, 6886237, 6914580, 7256752, 7372427, 7408515 SL1250 Product Specification v5 Iss 12-12 Sarantel Propriety Information 9