Rf Capacitor
The RF Capacitor is a device for determining the complex dielectric permittivity of bulk materials at very-high (VHF) and ultra-high (UHF) frequencies. It combines the concept of a low frequency capacitance method with radio frequency (RF) principles to enable accurate characterization of isotropic or anisotropic materials. It utilizes computational electromagnetic (CEM) inversion to convert the measured S-parameters into complex permittivity. CEM inversion applies a pre-computed database and interpolation to accurately determine intrinsic properties, which contrasts with conventional transmission line fixtures.
Applications of the RF Capacitor:
This fixture is effective for determining dielectric permittivity and loss of bulk absorber materials such as carbon loaded foam or honeycomb used in anechoic chamber absorber. The RF capacitor provides data that is just as accurate as using a large waveguide fixture, but over a wider bandwidth and with a much smaller (3 inch / 76.2 mm) cube specimen.
Benefits of the RF Capacitor:
- Characterizes a single specimen over a very broad frequency range.
- The same specimen can be measured in different orientations to capture all three principle permittivities when a material is anisotropic.
- Easier and less expensive than waveguide.
Additional Information
- Measurement fixture with integrated Copper Mountain R60 VNA.
- Designed for use with any Windows PC or laptop.
- 3-inch cube test / calibration standards.
- CTGCalc™ Software:
- Data acquisition and calibration (communicates via USB between the included Copper Mountain VNA and a customer supplied computer with Windows 10 or newer).
- Fast algorithm inverts measured S11 data into complex dielectric permittivity (based on pre-calculated table from full computational EM model of fixture).
- Plots data and provides standardized output formats that can be easily read into third-party plotting packages.
- One year software support and upgrades.
- Case for easy storage and transportation.
