Operating instructions RFID UHF antennas Low range / ultra
Contents
1. 7 4 Other applications for mid range antennas Other typical applications for the ANT820 ANT920 mid range antennas e Logistics applications when installed on autonomous industrial transport systems e Conveyor technology applications e Gate applications for detecting goods e Bulk and single tag applications For use of the antennas note the effective national regulations and the standards and guidelines possibly valid in particular for the application or its location RFID UHF antennas 8 Abbreviations The following abbreviations are used in these instructions German Institute for Standardisation European standard Effective Radiated Power 9 Approvals The table below lists the approvals of the respective antenna x mu T wao T EN Radio Frequency Identification ANT830 ANT910 ANT920 ANT930 10 Maintenance repair and disposal The device does not contain any components that need to be maintained gt Do not open the device K The device must only be repaired by the manufacturer gt Dispose of the device in accordance with the national environmental regulations 16 RFID UHF antennas 172. Pin 0 5 W Local limbs exposure 30 dBm 27 dBm Limit values local limps 4 W kg General public Head and trunk exposure Limit values head and trunk 2 W kg Pin 1 W Pin 0 1 W 30 dBm 20 dBm 11 RFID UHF antennas Max input power Distance person 1 cm distance 7 cm distance ANT920 and ANT920 lt person and person and 1 cm ANT920 lt 7 cm ANT920 General public Limit values head and trunk 2 W kg Pin 0 32 W Pin 1 84 W Limit values local limbs 4 Wikg Occupational exposure T mE Limit values head and trunk 10 W kg PIU M ide n Occupational exposure ju Limit values local limbs 20 W kg ic 2 Max input power Distance person and Distance person and ANT830 ANT930 ANT830 ANT930 lt 5 cm ANT830 ANT930 2 5 cm General public Limit values head and trunk 2 W kg Limit values local limbs 4 W kg Pon 697 mW Pon 923 mW 28 41 dBm 29 65 dBm Occupational exposure Limit values head and trunk 10 W kg Limit values local limbs 20 W kg p 923 mW 29 65 dBm 12 RFID UHF antennas 6 Installation 6 1 Installation location To reach the maximum range of the antennas there must not be any interfering objects between the antenna ant the tag to be read The operating principle of the antenna is influenced by the type of fixing and the surrounding materials To ensure optimum antenna performance there should be no conductive objects in the vicinity of the antenna The following figures are g
3. 11 2014 706385 00 ifm electronic Operating instructions RFID UHF antennas Low range ultra low range Mid range short mid range Wide range efeckoriad 0000 ANT805 ANT810 ANT815 ANT820 ANT830 ANT910 ANT920 ANT930 RFID UHF antennas Content 1 Preliminary Note T UTT 3 11 Symbols Used rss i i iris aes e a a eee a NN ESSE 3 2 Safety instructions v bue rro Eyes s VASE dado KT E NE a E Rd 9 e T eT esce eren ad abs eR Sed DENEN LI S RE ax M NR EEG Wa 3 Edi m 3 2 3 Electrical connection x 25 20 3 733 sea PS aca CR as be PA Ree RO dr d 4 2 4 Tampering with the device 0 ccc ee eens 4 2 5 Environmental conditions de oda c RO Re e San XC ON o P do 4 3 Product description ua ck 68 de 3e e Ho OR Deane Y Lied hemos e wR 5 3 1 Low range antennas sx a a anaana aaaea 5 3 2 Mid range antennas sanana nanana 5 3 3 Wide range antennas s 3 3 6 106 309098 nnana 3 8 CR Qe e COR e i CR dcn 6 3 4 Antenna type according to reading range and transponder shape 7 4 Reading range and selectivity llle 9 4 1 Antenna allocation according to tag types 0 0 0 ce ees 9 4 2 Reading Calig dua oe CIE OI OR OG t tcl CR c on oat Oa ed e e OE d Ge 9 ERI OUT ERERTEESERTTOLCETS TOIT Qu 0 DT 10 4 4 Selectivity and reading range of the low range antennas 10 5 Conformity with standards 23 2 12 8 093 6425534 2600056445
4. 4 E OR HE Scd 10 smi io e Trew 13 6 1 Installation location aa ataca eae t cct ac LC Coe OR ER ca e 19 6 2 Laying of eei sors ERERERETSRREUATERSIURPENS GERENS REOR 14 7 Typical applications ac ct teen eee pe ee oer awa he oak rr rr se 15 7 1 Pharmaceutical industry 4 4 4 4 aces OR aci ee oe d 3 3 Roe 9 d 15 7 2 Access SUSIOITIS uacua dea Bisa ou TR os BE Ted EO a e Re 19 7 3 Automation industry Pr 15 7 4 Other applications for mid range antennas n nananana naana 15 8 Abbreviations hrs se naaa a anana Pm 16 Pls aa sie e a e ea E ek oe a E E O N re 16 10 Maintenance repair and disposal aaae 16 RFID UHF antennas 1 Preliminary note This document is intended for specialists These specialists are people who are qualified by their appropriate training and their experience to see risks and to avoid possible hazards that may be caused during operation or maintenance of the device The document contains information about the correct handling of the device Read this document before use to familiarise yourself with operating conditions installation and operation Keep this document during the entire duration of use of the device UK 1 1 Symbols used Instructions Reaction result Designation of keys buttons or indications Cross reference Important note Non compliance may result in malfunction or interference 7 4 Information Supplementary note En 2 Safety instructions 2 1 Gener
5. al These instructions are an integral part of the device They contain texts and figures concerning the correct handling of the device and must be read before installation or use Observe the operating instructions Non observance of the instructions operation which is not in accordance with use as prescribed below wrong installation or incorrect handling can seriously affect the safety of operators and machinery 2 2 Target group These instructions are intended for authorised persons according to the EMC and low voltage directives The device must only be installed connected and put into operation by a qualified electrician RFID UHF antennas 2 3 Electrical connection Disconnect the device externally before handling it The connection pins may only be supplied with the signals indicated in the technical data and or on the device label and only the approved accessories of ifm may be connected 2 4 Tampering with the device In case of malfunctions or uncertainties please contact the manufacturer Any tampering with the device can seriously affect the safety of operators and machinery This is not permitted and leads to the exclusion of any liability and warranty claims 2 5 Environmental conditions Do not place the device in the vicinity of heatings do not expose it to direct sunlight and do not operate it in wet environments No objects with open flames must be placed onto the device Protect the device against moisture f
6. alling water drops and splashing water Observe the environmental conditions indicated in the technical data sheet There is a risk of fire in unsuitable environmental conditions RFID UHF antennas 3 Product description The ifm RFID antennas consist of several UHF antennas which can meet the requirements of almost any RFID application The antennas are divided into three product lines with regard to their reading range low range mid range and wide range antennas 3 1 Low range antennas With dimensions of 90 x 63 mm the ANT810 ANT910 low range antennas have a high field concentration in the near field and an extremely reduced antenna gain in the far field These features ensure that the antennas achieve ranges up to 10 cm with a typical selectivity of 5 cm In addition to the low range antennas there is the ANT805 ultra low range antenna The ultra low range antenna was designed to read dipole shaped tags far field tags at a very limited distance This antenna can also activate loop shaped tags near field tags up to 3 cm The low range antennas were developed for larger ranges so that they are in particular suitable for near field tags The antenna allocation according to the reading range and tag shape is outlined in chapter 3 4 Figure ANT805 ultra low range antenna ANT810 ANT910 low range antennas 3 2 Mid range antennas The ANT815 ANT820 ANT920 mid range antennas were designed for applications in th
7. e ANT810 ANT910 low range u Qr Figure Selectivity and reading range of ANT805 ANT810 ANT910 5 Conformity with standards Since the RFID systems are radio systems they are in the scope of the 1999 5 EC guideline of the European Commission Radio and Telecommunications Terminal Equipment R amp TTE 10 RFID UHF antennas As evidence of the conformity with the basic requirements of this guideline there is a number of harmonised standards that are published in the Official Journal of the European Union The ifm antennas have a passive antenna structure The system integrator is responsible for meeting the standards that means the person who combines the individual components of an RFID system in particular the readers and the antennas Therefore it is expressly recommended to acquire these standards Two important standards in connection with antennas are not exhaustive EN 302208 and EN 50364 The first one deals with radio spectrum matters and UK limits the maximally radiated power while EN 50364 deals with the limitation of human exposure to electromagnetic fields As evidence of the antenna conformity with the standard EN 50364 the specific absorption rate SAR is calculated numerically The determined SAR values are compared with the basic limit values of EN 50364 classified to occupational exposure exposure of the general public and local exposure of head and trunk and limbs The WiRa is in general used for a
8. e range between near and far field Special importance was placed on a compact design to ensure integration into space limited environments With dimensions of 156 x 126 reading ranges of more than 2 m are nevertheless possible Mid range antennas also have an increased selectivity at lower read distances as compared to conventional antennas That means the mid range antennas are suitable for use in the transition range with different tags RFID UHF antennas Figure ANT815 ANT820 ANT920 mid range antenna 3 3 Wide range antennas For the conventional far field applications with reading ranges up to 10 m ifm offers the ANT830 ANT930 wide range antennas that are distinguished by a full width at half maximum of 70 The circular polarisation usually required for UHF applications was significantly improved as compared to the antennas available on the market The new versions typically attain an axial ratio of 1 dB that is used as reference for circular polarisation The value common on the market if specified at all is approx 3 dB The improved circularity leads to a considerably reduced dependence of the read results on the tag s position or alignment Great importance was also placed on the front to back ratio of the antennas to reduce the influence of the close environment on the antenna properties All antennas have an extremely high protection rating which guarantees their use in any industrial environment F
9. he reading ranges of the ANT810 ANT910 low range antennas ensure the selection of individual pharmaceutical articles so that each drug can be traced right from the production Since the low range antennas couple primarily via the magnetic field the tags can be directly positioned on bottles and blister packs To obtain the optimum performance it is recommended to use the ANT810 ANT910 antennas together with loop shaped tags UK 7 2 Access systems Due to the large reading area of UHF antennas applications for access systems had been implemented via HF RFID so far The new UHF RFID low range antennas from ifm now allow these applications as well The use of loop shaped tags in conjunction with the ANT805 ultra low range antenna is recommended The tags are only read by the ifm low range antennas in a defined range This ensures that errors during reading and undesired monitoring of people is excluded The ANT820 ANT920 mid range antennas are recommended for access systems such as ski lifts buses and trains That means that tickets can now be checked at medium distance 7 3 Automation industry The low range antennas can be used for RFID automation applications with a defined reading area and high selectivity Of great advantage is the possibility to detect far field tags with the ANT805 antenna individually and to read the same tags with mid range or wide range antenna at other reading stations at larger distances in multi tag operation
10. igure ANT830 ANT930 wide range antenna RFID UHF antennas 3 4 Antenna type according to reading range and transponder shape Antenna type Reading range Tag type Loop Hybrid Dipole type 10 30 cm ANT805 ANT810 ANT910 ANT815 ANT820 ANT920 NT830 A ANT930 The correct combination of antenna and tag is essential for every RFID application The correct selection ensures a high reading rate and reliable operation of the system The low range ANT810 ANT910 and ultra low range antennas ANT805 can read the loop shaped and dipole type tags up to 10 cm and have a very well defined reading range The short mid range antenna ANT815 can activate hybrid type tags up to 10 cm and dipole type tags up to 100 cm The mid range antennas ANT820 ANT920 can activate loop shaped tags up to 30 cm the hybrid type tags up to 100 cm and the dipole type tags up to 2 m The wide range antennas ANT830 ANT930 can read loop shaped tags up to 30 cm the hybrid type tags up to 200 cm and the dipole type tags up to several metres RFID UHF antennas ANT830 ANT930 70 33 ERP 4 ANT820 ANT920 100 30 ERP 20cm ANT815 100 Pin 30 dBm ae ANT805 ANT810 100 27 ERP l l lt I l 40cm 20cm 0 20cm 40cm A Operate the ifm UHF RFID antennas only with ifm UHF readers to ensure best read and write results RFID UHF antennas 4 Reading range and selectivi
11. iven as sufficient distances The distance to large metal surfaces and the ground should be min 70 cm see Figure 1 If the installation in front of a metal surface cannot be avoided a mounting fixture can be used establishing a distance of exactly 12 cm between the rear of the antenna and the metal surface see Figure 2 With direct installation on a metal surface e g a plate as part of a mounting fixture use a square shaped metal plate which should not exceed the dimensions 16 x 16 cm see Figure 3 In addition other objects such as tanks filled with liquids located in direct vicinity affect the functions of the antenna Figure 1 Distance to all sides min 70 cm Figure 2 Distance Figure 3 between antenna and Metal surface with metal surface max 16 cm x 16 cm exactly 12 cm If the recommended distances are not observed the antenna characteristics change The antenna needs to be re evaluated in the respective installation The interference can be determined and minimised via the transmission level for example RFID UHF antennas 6 2 Laying of cables Observe the following notes when laying the cables e Laythe cables vertically and straight away from the antenna see figure on the right e Avoid cable loops around and on the antenna see figure on the left Figure Incorrectly laid cable Figure Correctly laid cable RFID UHF antennas 7 Typical applications 7 1 Pharmaceutical industry T
12. pplications with a reading area starting with 20 cm At this distance the values are significantly below the maximum SAR values permitted by law In case that use is intended for smaller distances the respective SAR values are numerically calculated The assumptions taken as basis such as operating mode of the RFID system and characteristics of the human tissue ensure a conservative estimate of the exposure worst case scenario The calculation was also made for the most sensitive constellation i e for the case that members of the general public stay permanently in direct vicinity of the antenna with their head or trunk If the distance between the person and the antenna is less than 3 cm the ANT820 ensures that the maximally allowed SAR is not reached with an antenna input power of up to 0 34 W 25 31 dBm In all other cases the ANT820 can be operated with the maximally radiated power of 0 5 W ERP 27 dBm or an antenna input power of 0 653 W 28 15 dBm The table below shows the maximum input powers with which the antenna may be supplied to ensure that the basic limit values of the SAR are not exceeded Two different types of exposure are differentiated Max input power Direct contact with Direct contact with ANT805 ANT810 ANT815 ANT910 ANT805 ANT815 ANT810 ANT910 Occupational exposure Limit values head and trunk 10 W kg Limit values local limbs 20 W kg Pin 1W Pin 0 5 W 30 dBm 27 dBm General public Pinz1W
13. r field tags at distances of up to 3 cm In order to significantly increase the read distance for near field tags the ANT810 ANT910 low range antenna was developed for reading ranges of 7 cm with conventional loop shaped tags The ANT805 ultra low range antenna is suited for all groups while the ANT810 ANT910 low range antenna is particularly suited for use with loop shaped tags 4 2 Reading range In order to quantify the reading range of the ANT805 and ANT810 ANT910 antennas the figures below show the respective reading ranges for different tag designs The tags are aligned parallel to the antenna The ANT805 antenna has a very well defined reading range for all tags The ANT810 ANT910 antennas are special solutions for near field tags with a considerably larger reading range than the ANT805 antennna RFID UHF antennas 4 3 Selectivity The high selectivity of the low range antennas opens up a number of new UHF RFID applications that could not be implemented previously Both versions can individually read tags with distances of partly less than 5 cm They are therefore the ideal antennas for item level tagging applications Figure Low range antenna reads tag at short Figure Reading range and selectivity distance Illustration 4 4 Selectivity and reading range of the low range antennas The table below lists the selectivity and reading ranges of the ultra low range and low range antennas Tag type ANT805 ultra low rang
14. ty The reading range and the selectivity are the most important features of an RFID application The reading range describes the greatest distance at which a tag can be read The selectivity indicates the required minimum distance for clear distinction between two adjacent tags The system features depend considerably on the tag type used In general the UHF RFID tags can be divided into three groups The first group consists of loop shaped tags that C couple magnetically with the antenna These tags UK have the smallest ranges since the magnetic field Figure Loop shaped tag decreases rapidly with the distance from the antenna The second group consists of hybrid type tags which are a mix of loop shaped and dipole type tags These Ie tags can be activated by the antenna via the l magnetic field the electric field or a combination of Figure Hybrid type tag both The third group is made up of dipole type tags far e field tags which mostly couple via the electric field Ranges of more than 10 m are possible Figure Dipole type tag 4 1 Antenna allocation according to tag types The ANT805 ultra low range antenna was developed to meet the most challenging demands with regard to range and selectivity of the tags from all three groups It is a universal antenna for many low range applications With this antenna very low reading ranges below 10 cm and high selectivity with far field tags are possible It can also read nea
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