A microstrip phase-trim device using a dielectric overlay

Couker, M.A.; Kushner, Lawrence J.

doi:10.1109/22.330113

Cited by 20 publications

(29 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As said before, to the authors' best knowledge, the only analytical formula already presented in the literature for the effective permittivity (and, thus, for the characteristic impedance) of a covered microstrip line is the one reported in Gouker and Kushner (1996). Such a formula is effective only in a certain range of the physical parameters describing the structure (see formulas 5(a) and (b) in Gouker and Kushner (1996)). Specifically, the ratio between the relative permittivity of the cover and of the substrate should not exceed four and the normalized width of the strip should not exceed 12= ffiffiffiffi ffi 1 r p .…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Assuming a quasi-TEM propagating mode, the characteristic impedance can be expressed as Z 0 ¼ Z 0; air = ffiffiffiffiffiffiffi 1 eff r q (Gouker and Kushner, 1996), where Z 0,air is the COMPEL 32,6 characteristic impedance of an air-loaded microstrip line (i.e. substrate permittivity is equal to 1 0 ), 1 eff r is the effective relative permittivity given by 1 eff r ¼ C=C air , C is the per unit length capacitance of the line of Figure 1 and C air is the per unit length capacitance of an air loaded line with the same geometry.…”

Section: Theorymentioning

confidence: 99%

“…Microstrip lines with a single or a stacked dielectric cover, on the other hand, are often used in microwave applications (Gouker and Kushner, 1996). For instance, they can be successfully employed as phase-shifters in integrated beam forming networks for patch antenna arrays (Honma et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…They generally involve, in fact, extensive computer programming or consider an infinite overlay thickness. Analytical formulas of the characteristic impedance can be found only in Gouker and Kushner (1996) and they are obtained by means of a proper fitting of numerical Method of Moment (MoM) full-wave simulation data.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characteristic impedance of a microstrip line with a dielectric overlay

Barbuto

Alù²,

Bilotti

et al. 2013

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

View full text Add to dashboard Cite

In this paper, an analytical expression for the characteristic impedance of a microstrip line in presence of a dielectric cover is presented. Assuming a quasi-TEM propagation mode, a rigorous conformal mapping based on the Schwarz-Christoffel transformation is employed to derive the equivalent capacitance model, which can then be applied to derive a closed analytical expression for the effective permittivity and the characteristic impedance of the line. Such a formulation is not limited to the case of a single cover layer, but an arbitrary number of electric overlays can be considered as well. Comparisons with published numerical results and full-wave simulations in the case of a single cover layer have been also performed to test the validity of the proposed approach

show abstract

Section: Numerical Resultsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characteristic impedance of a microstrip line with a dielectric overlay

Barbuto

Alù²,

Bilotti

et al. 2013

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

View full text Add to dashboard Cite

show abstract

“…The leaves have complex dielectric constant, with the real part depending on the phase and the imaginary part on the amplitude change. Since our experimental data gave only the amplitude change, the formula suggested by Gouker and Kushner [1994] was used to calculate the phase change due to overlay. The amount of phase trim (in degrees) for a particular overlay is given by…”

Section: Effect Of Acalypha (Ac)mentioning

confidence: 99%

Response of thick and thin film λ/2 microstrip rejection filter to leaf moisture

Ghorpade

Puri

2006

Radio Science

View full text Add to dashboard Cite

[1] Thick and thin film l/2 microstrip L section rejection filters in the X and Ku bands have been used to investigate the effect of leaf moisture on their response. The results reported are in the form of a comparative study of the X and Ku band response of the rejection filters. The investigations are aimed at using the overlay technique for studying the effect of leaf moisture changes on the rejection property of the filter. The leaves investigated were Tradescantia (magenta), Pothas Scandens (green), and Acalypha (bicolored red and green). These leaves were chosen because of their differences in thickness, texture, and color or chlorophyll content. The effects in the Ku band are more dramatic than in the X band for high moisture content (fresh leaves). The results show differences in the response of the thick and thin film filters to condition of leaf overlay. The response to moisture content in the dried leaves is almost similar irrespective of type of metallization of the filter, though the thick film filter seems to be more useful in the X band since some differences between 24 hour dried and 48 hour dried leaf overlay are seen.Citation: Ghorpade, R., and V. Puri (2006), Response of thick and thin film l/2 microstrip rejection filter to leaf moisture,

show abstract

Reconfigurable antenna with loading water fluidic switch

Liang

Huang

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A microstrip phase-trim device using a dielectric overlay

Cited by 20 publications

References 10 publications

Characteristic impedance of a microstrip line with a dielectric overlay

Characteristic impedance of a microstrip line with a dielectric overlay

Response of thick and thin film λ/2 microstrip rejection filter to leaf moisture

Reconfigurable antenna with loading water fluidic switch

Contact Info

Product

Resources

About