Magnetic sheets use metallic glass powder to increase RFID antenna sensitivity

2 November 2005 Passive Components

Alps Electric has developed new magnetic sheets that utilise metallic glass powder to boost the sensitivity of RFID (radio frequency identification) antennas.

RFID has recently been gaining attention as a technology that stores data on a minute wireless tag to identify people or manage goods. In recent years, non-contact power transmission technology has led to the appearance of wireless tags, which can be used semi-permanently without a battery, and with a variety of applications including pre-paid cards.

Alps developed the HMLSR Series of Liqualloy magnetic sheets to enhance electromagnetic compatibility (EMC), eliminating the problem of interference with waves that should reach the wireless tag from radio or electromagnetic waves generated by nearby parts and devices.

The sheet uses Alps' proprietary Liqualloy, a metallic glass powder consisting primarily of iron. According to the company, its amorphous structure allows a high degree of freedom in the shaping process, and it displays soft magnetic properties that can be readily activated by exposure to magnetic fields. In addition, its high permeability is 1,3 times greater than that of Fe-Al-Si alloys, the leading magnetic material, giving it superior capacity to absorb radio and electromagnetic waves, it says.

In RFID technology, it is not unusual to install parts and devices on the back of the wireless tag antennas. Under some conditions, this causes interference with waves that should reach the antenna. Alps claims these new sheets effectively focus waves to the antenna, increasing RFID antenna sensitivity.

www.alps-europe.com

Further reading:

Cutting-edge hybrid capacitors
Avnet Silica Passive Components
Panasonic Industry recently announced the launch of the ZVU Series Hybrid Capacitors, a cutting-edge solution tailored to meet the escalating demands of advanced electronic systems.

Read more...

---

Low-profile tantalum chip capacitors
Electrocomp Passive Components
These general-purpose tantalum capacitors from Kyocera AVX are available in multiple case sizes with low profile options.

Read more...

---

Coupled inductor for high-performance applications
Passive Components
This coil with MnZn core is characterised by its high permeability and extremely low RDC values, which achieves excellent power density and very high efficiency.

Read more...

---

Power inductors
iCorp Technologies Passive Components
he HTF-MP series is more suitable for complex multiphase power supply applications in design, effectively meeting the needs of ultra-thin and high-power devices.

Read more...

---

SMT power inductors
Future Electronics Passive Components
The Würth Elektronik WE-MXGI SMT power inductors are the latest addition to Würth Elektronik’s moulded power inductor series, engineered for high-frequency power applications.

Read more...

---

Large capacitance MLCCs at 100 V
RS South Africa Passive Components
TDK Corporation has expanded its CGA series for automotive multilayer ceramic capacitors to 10 µF at 100 V in 3225 size.

Read more...

---

Film and mica capacitors
Actum Electronics Passive Components
By utilising various polymer dielectrics plastics, Exxelia film and mica capacitors meet most technical requirements and serve all functions from standard filtering to specialised applications.

Read more...

---

Power-over-coax inductors
RS South Africa Passive Components
TDK has expanded the ADL3225VF series of wire-wound inductors for automotive power-over-coax (PoC).

Read more...

---

Thick film power resistors
Electrocomp Passive Components
Vishay has released a new product to the market, its thick film power resistor, which is offered in a clip-mount TO-247 package.

Read more...

---

Compact EMI suppression capacitors
RS South Africa Passive Components
These new components from TDK are 20% smaller than previous models and meet Grade III Test B standards for temperature, humidity, and bias.

Read more...

---