Wide range of microwave ferrites and dielectrics launched by Frequency Products

Citation

(2000), "Wide range of microwave ferrites and dielectrics launched by Frequency Products", Microelectronics International, Vol. 17 No. 2. https://doi.org/10.1108/mi.2000.21817bad.012

Wide range of microwave ferrites and dielectrics launched by Frequency Products

Keywords Frequency Products, Microwaves, Communications

Frequency Products has launched a wide range of microwave ferrites and dielectric materials in various standard shapes such as rods, blocks, discs, truncated triangles, hexagons and substrates.

Designed for use in a wide range of microwave communication applications, the microwave ferrite materials' range encompasses garnets and spinels manufactured from various materials. Garnets can be supplied in yttrium aluminium for low loss and wide bandwidth and yttrium gadolinium aluminium iron or yttrium gadolinium iron for greater temperature stability. Garnets are also available in narrow line width types for very low loss and wide bandwidth and versions for high power handling applications.

Spinels are available in lithium titanium zinc iron for high magnetisation, excellent temperature stability and low loss, nickel chromium zinc iron for high magnetisation and extreme temperature stability and magnesium manganese aluminium iron for low loss applications.

Microwave dielectric materials include temperature compensated types in zirconium tin titanate (ZTT). Typical characteristics include dielectric constant of 37 ±1, Q of 5,000 @ 9.4GHz, loss tangent of <=0.0002 and temperature coefficient of -3 to +12ppm^-1 (±1).

Schaefer (plastic) dielectrics are also available. These unique dielectric materials comprise a finely divided ceramic filler dispersed in a polystyrene matrix. Easily machinable, these dielectrics are available in 114 x 114mm blocks up to 30mm thick. Typical characteristics are dielectric constant from 3 to 20, loss tangent <=0.0009 and operating temperature range from -55 to +100°C.

Ceramic dielectric materials in the range are the T3A manufactured from low loss ceramic titania (dielectric constant 80 to 100, loss tangent <=0,001), the P1A that is based on magnesium manganese aluminium iron spinel (dielectric constant 9.2 ±5 per cent, loss tangent <0.0015) and the P2A, a low loss ceramic based on lithium ferrite (dielectric constant 20 ±5 per cent, loss tangent <0.001). Alumina materials are also available with dielectric constant of 9.5 and materials with dielectric constant up to 150 can also be supplied to special order.

The microwave ferrite and dielectric materials are ideal for use in a wide range of communication applications in the frequency range from 0.5 to 100GHz. Such applications include cellular base stations and mobile phone handsets, global positioning systems (GPS), satellite television and defence communications. Typical uses in these areas include isolators, circulators and dielectric resonators for cellular mobiles, phase shifters for phased-array radar systems, low noise blocks for direct broadcast through satellite (DBS) and patch antenna for GPS.

For more information, please contact: Andy Treble. Tel: +44(0) 1460 57166; Fax: +44(0) 1460 57777; E-mail: sales@frequencyproducts.com