RFID phase shifters: AdvanPhaser-2:4TM 


AdvanPhaser-2:4 is a bi-directional phase shifter that splits a RF input into two outputs and can apply an electronically controlled change of phase between these two outputs in four 25° steps.

AdvanPhaser-2:4 can be used to control electronically the beam orientation of a directive antenna. This movement of the beam has several applications in RFID systems:

  • Increase read-rate in RFID portals and loss prevention systems 
  • Obtain a very precise confinement of readings by selecting only those tags that have been read in two consecutive beam orientations 
  • Avoid detecting unwanted tags, by orienting the beam in a specific direction 
  • Avoid generating false alarms in loss prevention systems at retail stores, by orienting the beam towards the store access instead of towards the interior of the store

AdvanPhaser-2:4 is compatible with most RFID reader models in the market, including Keonn’s AdvanReader, Impinj, Sirit, Motorola, ThingMagic Mercury6, and others.

Business benefits of AdvanPhaser-2:4:

  • Higher read-rate in critical RFID applications
  • High confinement of readings in a specific zone
  • Avoids detection of unwanted tags by orienting the antenna in another direction
  • Easy change of phase by sending proper commands to the reader
  • Compatible with most reader models
  • Very fast and easy connection
  • Easy control of several AdvanPhaser units by interconnecting them with standard Ethernet cables
  • Low insertion loss
  • Wide input voltage supply

Download AdvanPhaser-2:4 data sheet   


Operating frequency 860 MHz to 950 MHz
Number of ports 2
Number of phases 4 (two control bits)
Phase angle steps 25º
Phases -135º, -45º, 45º, 135º
Phase error < 3º
Beam positions Depend on antenna separation (see the User's Guide)
Switching time between phases 5 µs
Amplitude unbalance 0.3 dB
Insertion loss 1.3 dB (typ.)
Isolation 25 dB (typ.)
Maximum input power 33 dBm (2 W)
RF connectors 1 input and 2 output MCX or SMA 50 ohm receptacle connectors
Control and power connector 2 input/output RJ45 connectors (Table 1)
Digital inputs 0 V/5 V TTL or open collector
Note 1: B0 and B1 are provided with 10 kOhm pull-up resistors
Note 2: Reader outputs must sink 2 mA (maximum)
Note 3: 3.3 V readers must be 5 V tolerant
Connection to AdvanReader-m4 Requires only a conventional Ethernet cable
AdvanReader-m4 can control at the same time AdvanPhaser and AdvanMux multiplexers
Connection to Impinj R220 and R420, and ThingMagic Mercury 6 Requires a cable adaptor (available upon request) and a conventional Ethernet cable (UTP cable)
Connection to other readers Compatibility with most readers. Requirements:
– AdvanGPIO connection board (available upon request)
– For some reader models: PoE injector (available upon request)
Cable adaptor Optional
Length: 25 centimetres (10 inches)
Control connection between AdvanPhaser units Through standard Ethernet 8-wire UTP cables
Power supply Pin 4 & 5: 5 V (-10 %) to 48 V (+5%) through PoE (regulated on board). Note: Maximum rating is 50 V
Current consumption < 6 mA
Light indicators Power On: White SMD LED. Control bits: Two red SMD LED
Electrostatic protection Included for all RF and digital inputs/outputs
Size 137 mm x 67 mm x 18 mm
5.4 inches x 2.6 inches x 0.7 inches
Weight 50 g
Operating temperature -40 °C to 55 °C
Storage temperature 40 °C to 85 °
EU Directives RoHS compliant (2002/95/EC), EMC (2004/108/EC)