RFID phase shifters: AdvanPhaser-2:4TM
AdvanPhaser-2:4 TM 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 TM 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 TM 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 TM:
- 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-2:4TM data sheet 
Specifications:
| Operating frequency | 860 MHz to 950 MHz |
| Number of ports | 2 |
| Number of phases | 4 (two control bits) |
| Phase angle steps | 25º |
| Phases | -37.5º, 12.5º, 12.5º, 37,5º |
| Phase error | < 3º |
| 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) |