Microwave absorbers

The MT microwave absorber range consist of high performance, broad band, carbon loaded polystyrene absorbers with an operating frequency from 70MHz to 40GHz. Due to the excellent performance at microwave frequencies the MT series is designed for Antenna Pattern Measurement (APM), (compact) Antenna Test Range (ATR) Radar Cross Section (RCS), and free space testing anechoic chamber applications.
The MT series consist of four different models:
MT25 (250mm / 10”)

Walkway absorber solutions

The walkway solution is designed to provide safe and easy access for the test engineers to the antenna and EUT in full anechoic chambers. Due to the use of connectable fiberglass reinforced epoxy grid panels, they combine extreme strength with minimal RF scattering. This walkway is available as a cascade with floor absorber (WWA) and without (WW).
It is recommended to use the walkway in the non-critical area of the chamber and at a reduced height compared to the applied floor absorber. For example if the floor absorber is MT-45, the WWA-MT25 shall be used. The reflectivity of this walkway solution corresponds to that of the performance of the absorber under the walkway for frequencies up to 3GHz. Above 3 GHz the reflectivity (backscatter) performance is limited to -40dB. Despite the specular reflection (scatter) is in the order of -20dB, the angle of incidence equals the angle of reflection and therefore the unwanted waves will damped by the absorber lining of the chamber. Due to the reduced height of the walkway and the above mentioned RF characteristics, the influence of the walkway on the measurements in the chamber is neglect able as long as the walkway is used in the non-criical area of the chamber.
The walkway solution model WWA is available in the following models:
Walkway solution using HT25 absorber (hybrid)
Walkway solution using MT25 absorber (microwave)
Walkway solution using HT45 absorber (hybrid)
Walkway solution using MT45-JT absorber (microwave)

Specifications of the walkway absorber solutions: