RF Sample Cells
For measurements without temperature control, they can be directly connected to a RF impedance or network analyzer APC-7 connector port. For usage with our temperature control systems, the RF extension line is required as well.
The sample is prepared between two sandwich electrodes building a sample capacitor similar to the BDS1200 cell.The BDS 2100 and BDS2200 have inner diameters of 7 mm and 14 mm, respectively.
electrodes are available from 3 .. 12 mm
diameter. Due to the spatial restriction, the maximum
electrode diameter for the BDS 2100 is 6
Electrode spacing may be selected between 10 µm and 5 mm.
The sample capacitor terminates the analyzer or RF extension line coaxial measurement APC-7 port. The sample impedance is extracted from the measured reflected signal.
RF electrodes from 3 .. 6 mm diameter may be used.
Note: Electrodes with larger diameters are easier to handle. Therefore the BDS 2200 is recommended except if frequencies > 3 GHz are required.
Small spacers, for instance 50 micron silica fibers, can be used to separate the cup electrode and the top electrode. The top electrode has a diameter of 10 mm so that surplus material is pressed out of the electrode area automatically.