Planar Annular Ring Antennas With Multilayer Self-Biased NiCo-Ferrite Films Loading

Yang, Guo‐Min; Xing, Xing; Daigle, A.; Obi, Ogheneyunume; Liu, Ming; Lou, Jing; Stoute, Stephen; Naishadham, K.; Sun, Nian X.

doi:10.1109/tap.2009.2039295

Cited by 51 publications

(35 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Low-temperature ferrite film deposition procedures are quite limited in number, though electroplating [23] and spin-spray [7][8] methods have been successfully attempted. Both techniques are viable options for implantable antenna ferrite loading, though the sol-gel dipcoating method [24] will be our primary deposition process of interest.…”

Section: Ferrite Dip-coating Depositionmentioning

confidence: 99%

See 1 more Smart Citation

Implantable ferrite antenna for biomedical applications

Fazeli

Hong

Lee

et al. 2016

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

Section: Ferrite Dip-coating Depositionmentioning

confidence: 99%

“…Furthermore, ferrite films have garnered recognition for radio-frequency (RF) device miniaturization [6], with specific attention to NiCo iron oxide films [7][8]. In [9], a Ni-0.23Co0.27Fe2.50O4 film is reported exhibiting a relatively high permeability (µr) and low magnetic loss (tan δµ) of 10 and 0.3, respectively, at 2.45 GHz.…”

mentioning

confidence: 99%

Implantable ferrite antenna for biomedical applications

Fazeli

Hong

Lee

et al. 2016

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…[110][111][112][113][114][115][116] The special case of a magnetodielectric material, when the permittivity e and permeability l are equal, is sought. In this case, the characteristic impedance of the medium is equal to that of the free-space.…”

Section: Voltage Tunable Magneto-electric Rf/microwave/millimeter Wavmentioning

confidence: 99%

Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components

Subramanyam¹,

Cole²,

Sun³

et al. 2013

Journal of Applied Physics

Self Cite

147

View full text Add to dashboard Cite

There has been significant progress on the fundamental science and technological applications of complex oxides and multiferroics. Among complex oxide thin films, barium strontium titanate (BST) has become the material of choice for room-temperature-based voltage-tunable dielectric thin films, due to its large dielectric tunability and low microwave loss at room temperature. BST thin film varactor technology based reconfigurable radio frequency (RF)/microwave components have been demonstrated with the potential to lower the size, weight, and power needs of a future generation of communication and radar systems. Low-power multiferroic devices have also been recently demonstrated. Strong magneto-electric coupling has also been demonstrated in different multiferroic heterostructures, which show giant voltage control of the ferromagnetic resonance frequency of more than two octaves. This manuscript reviews recent advances in the processing, and application development for the complex oxides and multiferroics, with the focus on voltage tunable RF/microwave components. The over-arching goal of this review is to provide a synopsis of the current state-of the-art of complex oxide and multiferroic thin film materials and devices, identify technical issues and technical challenges that need to be overcome for successful insertion of the technology for both military and commercial applications, and provide mitigation strategies to address these technical challenges. V C 2013 AIP Publishing LLC.

show abstract

“…In order to improve impedance matching for hexaferrite RF antenna, we have partially covered a Co 2 Z (Ba 3 Co 2 Fe 24 O 41 ) hexaferrite antenna with ferrite film rather than bulk ferrite. The film form of ferrite has advantages over bulk ferrite [7,8]. This is because the Snoek's limit of ferrite film is increased by a factor of according to the equation (3): ,…”

Section: Introductionmentioning

confidence: 99%

Impedance Matching of Electrically Small Antenna with Ni-Zn Ferrite Film

Lee¹,

Hong²,

Lee³

et al. 2013

Journal of Magnetics

View full text Add to dashboard Cite

We demonstrate that a partial loading of Ni 0.5 Zn 0.5 Fe 2 O 4 (Ni-Zn ferrite) film remarkably improves impedance matching of electrically small Ba 3 Co 2 Fe 24 O 41 (Co 2 Z) hexaferrite antenna. A 3 µm thick Ni-Zn ferrite film was deposited on a silicon wafer by the electrophoresis deposition process and post-annealed at 400 o C. The fabricated Ni-Zn ferrite film has saturation magnetization of 268 emu/cm 3 and coercivity of 89 Oe. A partial loading of the Ni-Zn ferrite film on the Co 2 Z hexaferrite helical antenna increases antenna return loss to 24.7 dB from 9.0 dB of the Co 2 Z antenna. Experimental results show that impedance matching and maximum input power transmission to the antenna without additional matching elements can be realized, while keeping almost the same size as the Co 2 Z antenna size.

show abstract

Planar Annular Ring Antennas With Multilayer Self-Biased NiCo-Ferrite Films Loading

Cited by 51 publications

References 28 publications

Implantable ferrite antenna for biomedical applications

Implantable ferrite antenna for biomedical applications

Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components

Impedance Matching of Electrically Small Antenna with Ni-Zn Ferrite Film

Contact Info

Product

Resources

About