6.3 - A Time Domain Measurement Technique for the Frequency Response of Voltage Controlled Capacitors
- Event
- iCCC2024 - iCampµs Cottbus Conference
2024-05-14 - 2024-05-16
Cottbus - Band
- Vorträge
- Chapter
- Kommunikation und HF-MEMS
- Author(s)
- K. Huebner, A. Koelpin - Technische Universität Hamburg, Hamburg
- Pages
- 87 - 91
- DOI
- 10.5162/iCCC2024/6.3
- ISBN
- 978-3-910600-00-3
- Price
- free
Abstract
This paper proposes a measurement technique to analyse the frequency response to changes in the control voltage of variable capacitors (varactors) with capacitance controlled by an external voltage. Examples are based on micro-electro-mechanical systems (MEMS) or ceramic components. The measurement principle is based on an RC circuit to which a continuous wave signal at the corner frequency of the resulting filter structure is applied. Equations are derived to determine the capacitance values as well as the frequency response of the varactor. Finally, a test setup is presented that verifies the results using a commercially available ceramic varactor.