July 29, 2016

RF dielectric characterization

Material characterization at GHz frequencies


Precise electric characterization of plastics / ceramics / polymer composites used in wireless devices at GHz frequencies is of utmost importance for antenna / EMC designers. Having known accurate material parameters helps in accurate simulation results, thus avoiding unnecessary multiple prototyping rounds.

Plastic resin manufacturers can use this high-frequency data in their data sheets, making their products more attractive, for example to the device manufacturer.

Currently, we can characterize dielectric materials at 1.1, 1.9, 3.1 and 5.1 GHz. Please contact us if you have special frequency bands of interest.

Some examples of materials that we measure.

  • Plastics such as Rubber, PVC, POM, PTFE, Polyamide films …etc
  • Glass
  • Cardboard
  • Ceramics
  • FR4
  • Thin ferroelectric films deposited on a substrate like Alu

Why you need material testing at microwave frequencies?

Here are two example showing the importance of these measurements, figure 1 shows a typical antenna used in a mobile device working at GHz frequencies. Antenna dimensions depend on electrical properties (εr and Tanδ) of antenna carrier. Thus, accurate material parameters at GHz frequencies are required for precise antenna / EMC simulations. Inaccurate material parameters can lead to unnecessary prototyping rounds wasting time and money.


Figure 2 shows part of a printed circuit board (PCB) used in a wireless device. Knowledge of permittivity and loss tangent values is very important in the design of RF microstrip lines for optimizing the overall system performance.

Figure 1: An example of a mobile phone antenna


Figure 2: A simulation model for RF microstriplines.

Our clients

  •         Mobile handset / wearables device designers / manufacturers
  •        Other wireless device manufacturers such as IoTs.
  •        Plastic resin manufacturers
  •        Other antenna solution providers such as RFID tag designers and manufacturers