IFM Electronic ANT820 Short Instructions

Short instructions

RFID-UHF-Antenna

Mid Range

ANT820

704979 / 00 01 / 2012

UK

RFID-UHF-Antennas

2

Inhalt

1 Preliminary note � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3

2 General safety notes� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3

3 Product description� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4

3�1 Low range antennas� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
3�2 Mid range antennas � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
3�3 Wide range antennas � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
3�4 Antenna type according to read range and transponder shape � � � � � � � � � 6

4 Technical Data � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8

5 Reader output power � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �11

6 Compliance with standards� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12

7 Installation / Attachment � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 14

8 Typical applications� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 16

9 Technical appendix � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 17

9�1 Antenna gain � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 17
9�2 ERP: Effective radiated power � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 18
9�3 Examples – antennas – input power � � � � � � � � � � � � � � � � � � � � � � � � � � � � 18

10 Abbreviations � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 19

UK

RFID-UHF-Antennas

3

1 Preliminary note

Read this document before use to familiarise yourself with operating conditions,
installation and operation� Keep the document during the entire duration of use of
the device�

Adhere to the safety instructions�

2 General safety notes

Before starting installation work or replacing the unit, the accompanying applica­tion notes must be read carefully and the content understood�

The detailed information in the data sheets and in these application notes must be
complied with carefully during installation and operation!

The installation team must be properly qualified and familiar with the safety regula­tions applicable in the country concerned�

Connection, installation and maintenance work, as well as all other work on the
unit, may only be carried out by properly qualified and trained employees� The unit
may only be used for the purpose intended by the manufacturer�

Unauthorized changes to the unit and the use of spare parts and peripheral
devices which are not sold or recommended by the manufacturer can result in
fires,electric shocks and injuries� Such actions therefore result in exclusion of liabil­ity and make the manufacturer’s guarantee (warranty) null and void�

The version of the manufacturer’s guarantee (warranty) applies which was valid
at the time of purchase� We accept no liability for unsuitable manual or automatic
adjustments made to the unit parameters and inappropriate use of the unit�

Repairs may only be undertaken by authorised personnel� Opening or attempting
to repair the unit makes all guarantee/warranty claims null and void� Improper work
on the unit may jeopardise electrical safety�

The manufacturer is not liable for accidents caused by the user opening the unit!

When carrying out work on the unit, the valid safety regulations must be complied
with�

RFID-UHF-Antennas

4

3 Product description

The ifm electronic antenna range includes a variety of UHF reader antennas,
which can fulfil the requirements of almost all RFID applications� The antennas are
divided into three product lines according to read range: low range, mid range and
wide range antennas�

3.1 Low range antennas

With dimensions of 90 x 63 mm, the low range antennas have a high field concen­tration in the near-field, with significantly reduced antenna gain in the far-field� With
these properties, the antennas achieve writing/reading results at ranges of up to
10 cm with a typical selectivity of 5 cm�

Low range antennas are available in Low Range (ANT810/ANT910) and Ultra Low
Range (ANT805)� The ultra low range antenna was designed to read dipole tags
(far-field tags) at an extremely limited distance� These antennas can also activate
loop tags (“near-field tags”) up to 3 cm� The Low range antenna was developed for
larger ranges and is particularly suited to near-field tags� The antenna allocation
according to read range and transponder shape is outlined in Chapter 3�4�

Figure: ANT810 / ANT910 Low Range Antenna Figure: ANT805 Ultra Low Range Antenna

3.2 Mid range antennas

The mid range antenna ANT820 was developed for applications in the area
between near-field and far-field� Particular importance was placed on creating a
compact construction to enable integration into environments with limited space�
Read ranges of over 2 m are still possible even with dimensions of 156 x 126 mm�
The mid range antenna also offers increased selectivity at lower reading distances
compared with conventional antennas� This antenna design is therefore also suit­able for use in the so-called transition area with a variety of transponder types�

UK

RFID-UHF-Antennas

5

Figure: ANT820 Mid Range Antenna

3.3 Wide range antennas

For traditional wide-range applications with read ranges of over 10 m, ifm elec­tronic offers a wide range antenna model characterised by a half width of 70°
(ANT830)� The circular polarization usually required for UHF applications has been
significantly improved compared with other antennas available on the market� For
the so-called axis ratio, which is used as a characteristic value for circular polariza­tion, the new model achieves typical values of 1 dB� If specified at all, the usual
value on the market lies at around 3 dB�

The improved circularity
leads to a significant reduc­tion in the dependence of
the reading results on the
position or alignment of the
transponder� Great impor­tance was also placed on
the front-to-back ratio of the
antennas to reduce the influ­ence of the close (assembly)
environment on the antenna
properties�All antennas have
an extremely high protec­tion class which guarantees
problemfree use in any
environment�

Figure: ANT830 Wide Range Antenna

RFID-UHF-Antennas

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3.4 Antenna type according to read range and transponder shape

Antenna type Read range Tag type

Loop tag Hybrid Dipole tag

ANT805
ANT810
ANT910

0-10 cm

ANT820

10-30 cm

30-100 cm

> 100 cm

ANT830

10-30 cm

30-200 cm

> 200 cm

The correct combination of reader antenna and transponder is essential for every
RFID application� The correct selection ensures a high read rate and reliable op­eration of the system�

The low range (ANT810/ANT910) and ultra low range antennas (ANT805) can
read loop, hybrid and dipole transponders up to 10 cm and offer a very good de­fined read range�

The mid range antenna (ANT820) can activate loop transponders up to 30 cm,
hybrid up to 100 cm and dipole transponders up to several meters�

The wide range antenna (ANT830) is designed for typical far-field dipole tran­sponders with read ranges of over 10 m, but it can also read the near-field and
hybrid transponders at a short distance�