Determination of Loaded, Unloaded, and External Quality Factors of a Dielectric Resonator Coupled to a Microstrip Line

Khanna, A.P.S.; Garault, Y.

doi:10.1109/tmtt.1983.1131473

Cited by 146 publications

(57 citation statements)

References 6 publications

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“…The dielectric constant was measured by Hakki and Coleman method [16] with the dielectric placed in between two conducting plates. The Q factor was measured by the microstripline method of Khanna and Garault [17]. The coefficient of thermal variation of resonant frequency (τ f ) was measured by noting the temperature variation of resonant frequency of TE 011 mode over the range of temperature 25-80 • C. Table 2 shows the microwave dielectric properties of Pr 1−x Gd x TiNbO 6 samples.…”

Section: Microwave Characterizationmentioning

confidence: 99%

Synthesis, characterization and properties of [RE1−xREx′]TiNbO6 dielectric ceramics

Solomon

Kumar

Surendran

et al. 2001

Materials Chemistry and Physics

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Section: Microwave Characterizationmentioning

confidence: 99%

Synthesis, characterization and properties of [RE1−xREx′]TiNbO6 dielectric ceramics

Solomon

Kumar

Surendran

et al. 2001

Materials Chemistry and Physics

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“…This damping mechanism is related to radiation of the magnetization precession energy back into the probing system -the stripline, because of non-negligible coupling between the two. Basically, one deals with the fact that the external and unloaded Q-factors of a resonator are different [28] if coupling of the resonator to environment is not vanishing. The theory developed in the present work includes naturally the radiation damping, as well as damping due to eddy currents and excitation of travelling spin waves.…”

Section: Introductionmentioning

confidence: 99%

Coupling of microwave magnetic dynamics in thin ferromagnetic films to stripline transducers in the geometry of the broadband stripline ferromagnetic resonance

Kostylev

2016

Journal of Applied Physics

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Abstract. We constructed a quasi-analytical self-consistent model of the striplinebased broadband ferromagnetic resonance (FMR) measurements of ferromagnetic films. Exchange-free description of magnetization dynamics in the films allowed us to obtain simple analytical expressions. They enable quick and efficient numerical simulations of the dynamics. With this model we studied the contribution of radiation losses to the ferromagnetic resonance linewidth, as measured with the stripline FMR. We found that for films with large conductivity of metals the radiation losses are significantly smaller than for magneto-insulating films. Excitation of microwave eddy currents in these materials contributes to the total microwave impedance of the system. This leads to impedance mismatch with the film environment resulting in decoupling of the film from the environment and, ultimately, to smaller radiation losses. We also show that the radiation losses drop with an increase in the stripline width and when the sample is lifted up from the stripline surface. Hence, in order to eliminate this measurement artefact one needs to use wide striplines and introduce a spacer between the film and the sample surface. The radiation losses contribution is larger for thicker films.

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“…1(b) [4], where . The resonant frequency can be obtained from (1) The coupling factor of the TL with a loading resonator is defined as the ratio of the resonator resistance at the resonance frequency to the sum of the external resistances which are observed from the resonator ports [9]. Using the simplified model of the SRR-loaded TL, Fig.…”

Section: Resonance Characteristics Of Splitmentioning

confidence: 99%

“…Using the simplified model of the SRR-loaded TL, Fig. 1(b), the coupling factor can be expressed in terms of the circuit model parameters as (2) The coupling factor can also be obtained from simulated or measured scattering parameters as [9] (3)…”

Section: Resonance Characteristics Of Splitmentioning

confidence: 99%

Split Ring Resonators With Tapered Strip Width for Wider Bandwidth and Enhanced Resonance

Horestani

Al-Sarawi

Abbott

2012

IEEE Microw. Wireless Compon. Lett.

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Abstract-This article presents a modified edge-coupled split ring resonator (SRR). The proposed SRR is composed of two concentric metallic rings with a nonuniform strip width, which is tapered based on the current and voltage profile in the SRR structure. In contrast to other SRR miniaturization methods, which are based on increasing the equivalent capacitance of the SRR, the proposed SRR benefits from both increased capacitance and inductance to preserve the strength and bandwidth of the resonance. It is also shown that compared to a uniform SRR, a tapered SRR with the same electrical size provides a stronger resonance with 84% wider bandwidth, as desired in wideband filter design. The theory and simulation results are validated through measurement.Index Terms-Metamaterials, split ring resonator (SRR).

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Determination of Loaded, Unloaded, and External Quality Factors of a Dielectric Resonator Coupled to a Microstrip Line

Cited by 146 publications

References 6 publications

Synthesis, characterization and properties of [RE1−xREx′]TiNbO6 dielectric ceramics

Synthesis, characterization and properties of [RE1−xREx′]TiNbO6 dielectric ceramics

Coupling of microwave magnetic dynamics in thin ferromagnetic films to stripline transducers in the geometry of the broadband stripline ferromagnetic resonance

Split Ring Resonators With Tapered Strip Width for Wider Bandwidth and Enhanced Resonance

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