High-temperature superconductor and ferroelectric thin films for microwave applications

Miranda, Félix A.; Warner, John Harley; Subramanyam, Guru

doi:10.1016/b978-012512908-4/50045-x

Cited by 3 publications

(3 citation statements)

References 76 publications

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“…Dielectric tunability as high as 90% is attainable in STO thin films at moderate loss-tangent values (typical values between 0.005-0.01 at GHz frequencies) [17]. So, this structure will provide a tunability up to 60% for E=30 Kv/cm.…”

Section: Adding Ferroelectric Materialsmentioning

confidence: 97%

Tunable and adaptive LHM ZOR using a nonlinear dielectric thin film of STO

Mansour

Elmala

Shalaby³

et al. 2013

2013 Saudi International Electronics, Communications and Photonics Conference

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In this paper, we propose a tunable CRLH ZOR based on the latest resurgent of ferroelectric materials. It is known that for most resonant structures, attainment of optimal performance requires some level of additional tuning through either mechanical means or other coupling mechanisms. Therefore, incorporation of electronic tuning into HTS components with-out degradation of performance is very attractive. The result will be low-loss microwave components that could be finetuned for optimal performance, with the additional attribute of being tunable over a broadband frequency range. The dielectric properties of the ferroelectric thin film, and the thickness of the ferroelectric film, play a fundamental role in the frequency or phase tunability and the overall insertion loss of the circuit. The ZOR is designed, and simulated by the full-wave analysis software. The response shows a variation of electromagnetic characteristics with the applied electric field, ferroelectric thickness and the operating temperature.

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Section: Adding Ferroelectric Materialsmentioning

confidence: 97%

Tunable and adaptive LHM ZOR using a nonlinear dielectric thin film of STO

Mansour

Elmala

Shalaby³

et al. 2013

2013 Saudi International Electronics, Communications and Photonics Conference

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“…18 So, this structure will provide a tunability up to 47.3% for E ¼ 30 Kv/cm. Table 4 demonstrates the comparison between the four proposed structures stated as:…”

Section: Adding Ferroelectric Materialsmentioning

confidence: 98%

Thin Film Ferroelectric Tunable Zeroth-Order Resonator Based on CRLH Metamaterials

Mansour

Elmala

Shalaby

et al. 2014

J CIRCUIT SYST COMP

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In this paper, we propose a tunable CRLH ZOR based on the latest resurgent of ferroelectric materials. It is known that for most resonant structures, attainment of optimal performance requires some level of additional tuning through either mechanical means (i.e., with tuning screws) or other coupling mechanisms. Therefore, incorporation of electronic tuning into high temperature superconductor (HTS) material components without degradation of performance is very attractive. The result will be low-loss microwave components that could be¯ne-tuned for optimal performance, with the additional attribute of being tunable over a broadband frequency range. The dielectric properties of the ferroelectric thin¯lm, and the thickness of the ferroelectric¯lm, play a fundamental role in the frequency or phase tunability and the overall insertion loss of the circuit. The main driving force toward using the ferroelectric is the potential for substantial miniaturization of microwave components and systems and the potential for integration with microelectronic circuits due to the development of thin and thick¯lm ferroelectric technology. The ZOR is designed, and simulated by the full-wave analysis software. The response shows a variation of electromagnetic characteristics with the applied electric¯eld, ferroelectric thickness and the operating temperature.

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“…For high-quality crystals, tanδ 3 is small with respect to tan δ 1 and tan δ 2 and can be neglected. Numerical values for Α 1 and Α 2 parameters for STO at a frequency of 10 GHz are given by [35]: Α 1 ¼ 2:4 * 10 À4 and Α 2 ¼ 4 * 10 À3 .…”

Section: Simulated Responses Of a One Unit Crlh-tl With Different Surface Resistances Of The Bias Linementioning

confidence: 99%

Tunable Zeroth-Order Resonator Based on Ferroelectric Materials

Mansour¹,

Kanaya²

2021

Multifunctional Ferroelectric Materials

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Tunable microwave devices have the benefits of added functionality, smaller form factor, lower cost, and lightweight, and are in great demand for future communications and radar applications as they can extend the operation over a wide dynamic range. Current tunable technologies include several schemes such as ferrites, semiconductors, microelectromechanical systems (MEMS), and ferroelectric thin films. While each technology has its own pros and cons, ferroelectric thin film-based technology has proved itself as the potential candidate for tunable devices due to its simple processes, low power consumption, high power handling, small size, and fast tuning. A tunable Composite Right Left-Handed Zeroth Order Resonator (CRLH ZOR) is introduced in this chapter and it relies mainly on the latest advancement in the ferroelectric materials. It is common that for achieving optimum performance for the resonant structure, this involves the incorporation of an additional tuning by either mechanical means (i.e. with tuning screws) or other coupling mechanisms. The integration between electronic tuning and High-Temperature Superconducting (HTS) components yields a high system performance without degradation of efficiency. This leads not only low-loss microwave components that could be fine-tuned for maximum efficiency but will provide a tunable device over a broadband frequency spectrum as well. The dielectric properties of the ferroelectric thin film, and the thickness of the ferroelectric film, play a fundamental role in the frequency or phase tunability and the overall insertion loss of the circuit. The key advantages of using ferroelectric are the potential for significant size-reduction of the microwave components and systems and the cabibility for integration with microelectronic circuits due to the utilization of thin and thick ferroelectric film technology. In this chapter, ZOR is discussed and the conceptual operation is introduced. The ZOR is designed and simulated by the full-wave analysis software. The response is studied using electromagnetic characteristics with the applied electric field, ferroelectric thickness, and the operating temperature.

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High-temperature superconductor and ferroelectric thin films for microwave applications

Cited by 3 publications

References 76 publications

Tunable and adaptive LHM ZOR using a nonlinear dielectric thin film of STO

Tunable and adaptive LHM ZOR using a nonlinear dielectric thin film of STO

Thin Film Ferroelectric Tunable Zeroth-Order Resonator Based on CRLH Metamaterials

Tunable Zeroth-Order Resonator Based on Ferroelectric Materials

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