Lumped-circuit elements at microwave frequencies

Aitchison, C.S.; Davies, R A; Higgins, I.D.; Longley, S.R.; Newton, B.H.; Wells, Jeffrey S.; Williams, J. C.

doi:10.1109/tmtt.1971.6373343

Cited by 30 publications

(4 citation statements)

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“…The interwinding capacitance limits the useful frequency range. Although this model can accurately predict the resonant frequency and the equivalent circuit parameters (ECPs) can be determined from an impedance sweep vs. frequency, [3] it fails to predict the width of the impedance spike around resonance and the increase in resistance at R.F. If the distributed capacitance is modeled as lossy, these high frequency effects can be predicted more accurately.…”

Section: Model Topologymentioning

confidence: 98%

Hybrid Inductor Modeling at L-Band using 1-Port Fixtured S-Parameter Measurements

Gaiewski

Dunleavy

Geis

1993

41st ARFTG Conference Digest

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Methods for deriving accurate L-band inductor models using 1-port fixtured S-parameter measurements are presented, along with examples of modeled inductor data. The modeled inductors include both surface mount "chip" inductors with nominal values ranging from 4.7nH to 330nH, and wirewound "leaded" inductors with nominal values from 7.5nH to 470nH. The test fixture for the surface mount inductors consists of a CoilCraft 1-port coaxial fixture, whereas a modified SMA connector was used as a test fixture for the leaded inductors. In both cases, the measurements were taken using an HP8510B network analyzer, to d o w for careful modeling of the fixture. The fixture models were used to de-embed the time-delay and energy storage effects of the fixtures from the coaxially calibrated HP8510 measurements of the fixtured inductors. Using EESof's Libra CAD package and de-embedded 1-port S-parameter data, models were developed for 33 samples of 21 inductance values of chip inductors, and 22 samples of leaded inductors. The models are seen to fit the measured data over a broad band, from low RF through resonance. Models for devices which self-resonate above 1 GHz maintain close tracking to measured data over the L-band (1-2 GHz).TRL calibrated 2-port microstrip measurements of the inductors were performed to verify the models obtained from the 1-port measured data. The 2-port measurement data is seen to track the 1-port measurements well, with some uncertainty caused by the effect of the microstrip mounting gap.Simple lumped/distributed filter circuits employing the inductors also were fabricated and tested. The simulations show a close tracking between the predicted characteristics using the 1-port derived models and 2-port filter measurements.. 'L.A Geb is with Honeywell

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Section: Model Topologymentioning

confidence: 98%

Hybrid Inductor Modeling at L-Band using 1-Port Fixtured S-Parameter Measurements

Gaiewski

Dunleavy

Geis

1993

41st ARFTG Conference Digest

View full text Add to dashboard Cite

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“…So, we deal with some approaches to include the dipoles located at the traces extremities. Usually, for very simple circuits, the Maxwell equations are modified by adding a current density following the I=f(V) law of the element [8,9].It is the case for resistors, capacitors and inductors. When more complicated linear and specially when non linear circuits are dealed with, the approach become instable in some cases.…”

Section: Linear and Non Linear Components Representation In Fdtd Codesmentioning

confidence: 99%

Resolution of EMC problems using 3D time domain methods

2008

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Abstract. Nowadays the number of boarded electronic devices is increasing and simultaneous, the number of electromagnetic perturbations also increases. Then, it becomes necessary to protect these equipments. This domain particularly concerns the ElectroMagnetic Compatibility where the problem is to find solutions to realize a cohabitation between all systems without interferences. As experiments are often expensive and limited, the theoretical approach is a good alternative. The choice of time domain methods is imposed by the nature of the perturbations which are generally transient pulses. So, in this paper, we will present some modelling problems in this area and propose some solutions.Résumé. De nos jours, on assisteà une augmentation du nombre de systèmesélectroniques embarqués. Parallèlement, le nombre de perturbateurs potentiels ne cesse de croître. Ce type de problème concerne le domaine de la compatibilitéélectromagnétiqueétudie plus particulièrement les problèmes de cohabitation des systèmes avec tous les parasitesélectromagnétiques. Les expérimentationsétant souvent coûteuses et limitées, une solution alternative est la simulation numérique. Le choix des approches temporelles est naturel de par l'aspect transitoire d'un grand nombre de perturbations. Dans cet article, nous allons présenter quelques problèmes de modélisation dans ce domaine et ainsi que proposer des solutions potentielles.

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“…If the distributed capacitance is modeled as lossy, the resistance rise at RF and the width of the impedance spike around resonance can be predicted accurately. While elaborate models for inductors in MMIC applications have been proposed [4], [5], the model shown in To measure the chip inductors, a Coilcraft SMD-A test fixture was used [6]. This fixture consists of a threaded base, which was attached to the network analyzer using a 90' bend rigid coaxial airline, and a gold-plated recessed test socket for the inductor.…”

Section: Measurement and Modeling Proceduresmentioning

confidence: 99%

“…Pavio and Kikel adapted Marchand's design for use in MIC and MMIC using planar broadsidecoupled transmission lines but did not present a quantitative analysis or design technique [2]. Tsai and Gupta [3] presented an analysis of and design procedure for Pavio's version of the Marchand balun using an equivalent circuit model for the two-coupled-line sections, based on Tripathi's quasi-TEM analysis [4], and design curves for a fourth-order version of the original Marchand balun [5].…”

Section: Introductionmentioning

confidence: 99%

Hybrid inductor modeling for successful filter design

Gaiewski

Dunleavy

Geis

1994

IEEE Trans. Microwave Theory Techn.

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Study of a Fabry-Perot cavity in the microwave frequency range by the boundary element method," Absfruct-A method for deriving accurate L-band inductor models using 1-port 6xtured S-parameter measurements is presented, along with examples of successful filter designs using the models. Models were developed for a number of surface-mount and leaded devices with values ranging from 4.7 nH to 470 nH. The devices were measured in a coaxial test fixture on an HP8510B network analyzer, with fixture de-embeddmg performed using CAD software. The models are seen to fit measured data over a broadband, from low F W through resonance. To M e r validate the models, several filter circuits were developed and fabricated.The results of 5th-and 9th-order lowpass filter designs are presented here. The 9th-order Mter was optimized for the desired performance using the parasitic inductor models. Measurements confirm that the use of the models led to a successful design on the %rst pass." Finally, simulations show that this success would not have been achieved without the developed inductor models.

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Lumped-circuit elements at microwave frequencies

Cited by 30 publications

References 0 publications

Hybrid Inductor Modeling at L-Band using 1-Port Fixtured S-Parameter Measurements

Hybrid Inductor Modeling at L-Band using 1-Port Fixtured S-Parameter Measurements

Resolution of EMC problems using 3D time domain methods

Hybrid inductor modeling for successful filter design

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