Comparison of Techniques for Microwave Characterization of BST Thin Films

Suherman, P. M.; Jackson, Tim; Lancaster, M.J.

doi:10.1109/tmtt.2006.889350

Cited by 19 publications

(15 citation statements)

References 19 publications

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“…In a second step, the initial estimates resulting from the matrix-pencil two-line method were refined by a resonant method that relies on a straight coplanar resonator (CPR) [ 35 ]. By matching the measured S-parameters to the simulated resonances by varying both

and

in CST Microwave Studio’s frequency domain (FD) electromagnetic field simulator, more accurate values for both parameters were determined.…”

Section: Methodsmentioning

confidence: 99%

“…Because the resonance frequencies of the CPR correspond to the resonant line’s length being (approximately) a multiple of half-a-wavelength [ 35 , 36 ], the longer resonator exhibits more resonance peaks than the shorter one. Therefore, it can be used to complement and fine-tune the results from the latter, especially over a broad frequency range.…”

Section: Methodsmentioning

confidence: 99%

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Cost-Driven Design of Printed Wideband Antennas with Reduced Silver Ink Consumption for the Internet of Things

Claus

Verhaevert²,

Rogier³

2022

Sensors

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The Internet of Things (IoT) accelerates the need for compact, lightweight and low-cost antennas combining wideband operation with a high integration potential. Although screen printing is excellently suited for manufacturing conformal antennas on a flexible substrate, its application is typically limited due to the expensive nature of conductive inks. This paper investigates how the production cost of a flexible coplanar waveguide (CPW)-fed planar monopole antenna can be reduced by exploiting a mesh-based method for limiting ink consumption. Prototypes with mesh grids of different line widths and densities were screen-printed on a polyethylene terephthalate (PET) foil using silver-based nanoparticle ink. Smaller line widths decrease antenna gain and efficiency, while denser mesh grids better approximate unmeshed antenna behavior, albeit at the expense of greater ink consumption. A meshed prototype of 34.76×58.03mm with almost 80% ink reduction compared to an unmeshed counterpart is presented. It is capable of providing wideband coverage in the IMT/LTE-1/n1 (1.92–2.17 GHz), LTE-40/n40 (2.3–2.4 GHz), 2.45 GHz ISM (2.4–2.4835 GHz), IMT-E/LTE-7/n7 (2.5–2.69 GHz), and n78 5G (3.3–3.8 GHz) frequency bands. It exhibits a peak radiation efficiency above 90% and a metallized surface area of 2.46 cm2 (yielding an ink-to-total-surface ratio of 12.2%).

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and

in CST Microwave Studio’s frequency domain (FD) electromagnetic field simulator, more accurate values for both parameters were determined.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Cost-Driven Design of Printed Wideband Antennas with Reduced Silver Ink Consumption for the Internet of Things

Claus

Verhaevert²,

Rogier³

2022

Sensors

View full text Add to dashboard Cite

show abstract

“…Systematic errors associated with conformal mapping when the gap between the signal and ground lines of the co-planar waveguides is comparable with the thickness of the film have been reported [15]. For wide gaps, consistency between resonator, co-planar waveguide and capacitance measurements has been demonstrated [16].…”

Section: Introductionmentioning

confidence: 96%

Influence of uncertainty in dielectric properties on the design performance of a tunable composite right/left handed leaky wave antenna

Gao

Jackson

Gardner

et al. 2015

2015 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF), International Symposium on Integrated Func

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Uncertainties of the order of 8 % in the accuracy of lithography used to define co-planar waveguides on ferroelectric thin films lead to a similar uncertainty in the value of relative permittivity of the film extracted from measurements. When such films are used as the tunable elements in a tunable composite right/left handed leaky wave antenna, such variations of the capacitance of the varactors can lead to a reduction in radiation and total efficiency around of the order of 1 dB in 5 dB due to the appearance of a bandgap in the frequency response.

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“…The choice of the measurement method and the correspondingly type of measurement setup strongly depends on the frequency range, on the form of the high dielectric constant material, and on the application of the final device. A comparison of film characterization techniques for microwave materials, involving coplanar waveguides (CPWs), coplanar resonators and interdigital capacitors (IDCs) made with high temperature superconductors printed over the film to be characterized was presented in [ 11], where good agreement among results for barium strontium titanate (BST) thin films was found. In [12], accurate measurement of BST‐0.5 (Ba 0.5 Sr 0.5 TiO 3 ) thin‐film based components and their characterization was performed using CPWs and IDCs, inferring the complex dielectric constant from scattering parameter measurements.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties characterization of high dielectric constant thick films

Demenicis

Marulanda

Lima

et al. 2010

Micro & Optical Tech Letters

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A technique for the characterization of microwave dielectric properties of high dielectric constant thick films at room temperature is proposed, using multilayered coplanar waveguide transmission lines with high dielectric constant thick films deposited over the lines.Besides the simplicity, the technique allows the characterization of the films under similar conditions to those in which they will operate as compact devices in multilayered configurations. Time domain analysis and experimental results for 61‐micron thick Barium Titanate films have confirmed the relative dielectric constant and loss tangent values (respectively, 100 and 0.3) predicted by the frequency domain characterization proposed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2339–2344, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25440

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Comparison of Techniques for Microwave Characterization of BST Thin Films

Cited by 19 publications

References 19 publications

Cost-Driven Design of Printed Wideband Antennas with Reduced Silver Ink Consumption for the Internet of Things

Cost-Driven Design of Printed Wideband Antennas with Reduced Silver Ink Consumption for the Internet of Things

Influence of uncertainty in dielectric properties on the design performance of a tunable composite right/left handed leaky wave antenna

Dielectric properties characterization of high dielectric constant thick films

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