Microwave Characterization Of Electro-Optic Polymers

Subramanyam, Guru; Mathala, Prasanna; Chevalier, Christine T.; Davis, Antonio A.; Yaney, Perry P.; Grote, James G.

doi:10.1557/proc-734-b9.15

Cited by 8 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Loss in PMMA samples was very low, and ε ′ ′ was not measured. This matches the reference and published data for PMMA in the microwave frequency range: = ′ ε 2.2-2.8, and = ′ ′ ε 0.01-0.3 [16][17][18][19].…”

Section: B Pmmasupporting

confidence: 91%

Method of Measuring Permittivity of Composite Materials with Hexagonal Ferrite Inclusions

Kitaitsev

Zhumabayeva

Koledintseva

2007

2007 IEEE International Symposium on Electromagnetic Compatibility

View full text Add to dashboard Cite

A new simple method for measuring complex permittivity of substantially lossy composite materials is presented. In this method, a sample of the material under study should completely fill in the cross-section of the single-mode transmission line (waveguide), and the length of the sample must be an integer of a half-wavelength in the waveguide filled with this material. The oscillator frequency is swept linearly, the minima of the reflection coefficient are measured, and then analytical formulas are used to calculate real and imaginary parts of permittivity. The method was tested on magnetodielectric samples containing hexagonal ferrite powders, as well on such dielectric materials, as PMMA, schungite composites, and alabaster. This method can be a useful technique for measuring dielectric properties of absorbing materials designed, for example, for electromagnetic shielding purposes.

show abstract

Section: B Pmmasupporting

confidence: 91%

Method of Measuring Permittivity of Composite Materials with Hexagonal Ferrite Inclusions

Kitaitsev

Zhumabayeva

Koledintseva

2007

2007 IEEE International Symposium on Electromagnetic Compatibility

View full text Add to dashboard Cite

show abstract

“…This value differs from 16% with the value of 3.01 found in litterature. 7 This result should be take carefully, as it is our first measurement using this method. We are currently working on the result accuracy improvement, by lowering the frequency measurement error.…”

Section: Resultsmentioning

confidence: 99%

Electrooptic microwave antenna using organic poled polymers

et al. 2006

View full text Add to dashboard Cite

We propose a new electrooptic antenna design using organic polymer to receive microwave signals. In this paper we present the characterization of an electrooptic organic polymer. We measured the dielectric constant at microwave frequencies, and the electrooptic coefficient. We measured values of r 33 of 3.35 pm/V at 1310 nm and 1.98 pm/V at 1550 nm. The goal of the electrooptic antenna design is to obtain maximum microwave and optical interaction. We propose a novel approach based on resonance effect in both optical and microwave domain. For the optical resonance effect we use a Fabry-Pérot cavity, and a patch structure as microwave resonator.

show abstract

“…The test structures were fabricated on bare substrates as well as on the thin film test samples for determination of attenuation and phase constants with and without the ferrite thin films. [31][32][33] …”

Section: B Microstructure and Magnetic Properties Characterizationmentioning

confidence: 99%

Structural investigations and magnetic properties of sol-gel Ni0.5Zn0.5Fe2O4 thin films for microwave heating

Gao

Rebrov

Verhoeven

et al. 2010

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

Nanocrystalline Ni 0.5 Zn 0.5 Fe 2 O 4 thin films have been synthesized with various grain sizes by a sol-gel method on polycrystalline silicon substrates. The morphology, magnetic, and microwave absorption properties of the films calcined in the 673-1073 K range were studied with x-ray diffraction, scanning electron microscopy, x-ray photoelectron spectroscopy, atomic force microscopy, vibrating sample magnetometry, and evanescent microwave microscopy. All films were uniform without microcracks. Increasing the calcination temperature from 873 to 1073 K and time from 1 to 3 h resulted in an increase of the grain size from 12 to 27 nm. The saturation and remnant magnetization increased with increasing the grain size, while the coercivity demonstrated a maximum near a critical grain size of 21 nm due to the transition from monodomain to multidomain behavior. The complex permittivity of the Ni-Zn ferrite films was measured in the frequency range of 2-15 GHz. The heating behavior was studied in a multimode microwave cavity at 2.4 GHz. The highest microwave heating rate in the temperature range of 315-355 K was observed in the film close to the critical grain size.

show abstract

Microwave Characterization Of Electro-Optic Polymers

Cited by 8 publications

References 5 publications

Method of Measuring Permittivity of Composite Materials with Hexagonal Ferrite Inclusions

Method of Measuring Permittivity of Composite Materials with Hexagonal Ferrite Inclusions

Electrooptic microwave antenna using organic poled polymers

Structural investigations and magnetic properties of sol-gel Ni0.5Zn0.5Fe2O4 thin films for microwave heating

Contact Info

Product

Resources

About