Self-Produced Ferrites Key to New Products at AFT Microwave 

Circulators and isolators are made from in-house produced ferrites at AFT Microwave 

Distinguished by high-quality microwave ferrites that it produces in-house, AFT Microwave of Germany has recently introduced new waveguide circulators and isolators that add to its extensive line of microwave components. Considered a core competency at AFT, the high-end microwave ferrites are the functional heart of its circulators, isolators and fast ferrite tuners, enabling their performance, power capability, reliability and longevity. 

One recent launch is a new-generation waveguide circulator, 915MHz WR975, which features very low insertion loss, high isolation and solid bandwidth, rated up to 100 kW cw. 
Another recent launch are the isolators 2450 MHz, available 1 kW to 10 kW true cw, also made of high-performance ferrites from in-house production. 

The development of the materials and the entire production process, including stringent quality testing with measurement of all crucial material parameters, has been taking place in-house for decades. “This sets us apart from the competition and makes us independent,” says AFT. The company’s name stands for Advanced Ferrite Technology. 

It manufactures the ferrites completely in its own ceramic production line, from grinding and mixing metal oxide powders and rare earths, to pressing and sintering at temperatures of more than 1200°C. The staff also process the sintered pieces with special grinding tools and bring the ferrites to narrowly tolerated final dimensions. 

AFT’s portfolio of microwave ferrites includes in-house recipes for spinels and garnets and serves a wide range of applications and operating frequencies. 
Wide range of shapes and dimensions are produced. 

The self-developed and produced ferrites continue to be the crucial component and are present in almost every one of the company’s products. The materials are designed for the highest performance requirements such as maximum power capability, minimal losses and high temperature stability and strong thermomechanical resilience. Located in Backnang, near Stuttgart, and now with about 50 employees, AFT has done its own ferrite development and production since 1955. See www.aft-microwave.com