A method for the determination of the complex permittivity by detuned ring resonators for bulk materials up to 110 GHz. Issue 3 (30th March 2015)

• Record Type: Journal Article
• Authors: Talai, Armin; Steinhäußer, Frank; Bittner, Achim; Schmid, Ulrich; Weigel, Robert; Koelpin, Alexander
• Editors: Perregrini, Luca; Colantonio, Paolo; Berizzi, Fabrizio
• Is Part Of: International journal of microwave and wireless technologies. Volume 7:Issue 3/4(2015)
• Page Start: 251
• Page End: 260
• Publication Date: 2015-03-30
• Subjects: Characterization of material parameters, -- Microwave measurements; Wireless communication systems -- Periodicals; Microwave circuits -- Periodicals; Radio frequency -- Periodicals; 621.381305
• DOI: 10.1017/S1759078715000483
• Languages: English
• ISSNs: 1759-0787

Abstract

Abstract : An accurate characterization of microwave materials is essential for reliable high-frequency circuit design. This paper presents a measurement setup, which enables a quick and accurate determination of the relative permittivity of dielectric bulk materials up to 110 GHz. A ring-resonator is manufactured on a well-characterized substrate, serving as reference resonator. The material under test (MUT) is placed on top of the ring, which increases the effective permittivity and therefore introduces a shift of the resonance frequency of the resonator. In case of moderate to large dielectric losses of the MUTs, the quality factor of the resonator decreases perceptibly, which provides conclusions about the dielectric losses. Electromagnetic field simulations with different heights and relative permittivities of the MUTs provide a look-up table for the measured resonance frequencies. The functionality of the proposed measurement setup is validated by measurement results of different MUTs.