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Journal articles on the topic 'Tunable Microwave Circuits'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Tae-Yeoul Yun and Kai Chang. "Piezoelectric-transducer-controlled tunable microwave circuits." IEEE Transactions on Microwave Theory and Techniques 50, no. 5 (May 2002): 1303–10. http://dx.doi.org/10.1109/22.999143.

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2

Fu, Jia-Shiang, Xinen Alfred Zhu, Jamie D. Phillips, and Amir Mortazawi. "Improving Linearity of Ferroelectric-Based Microwave Tunable Circuits." IEEE Transactions on Microwave Theory and Techniques 55, no. 2 (February 2007): 354–60. http://dx.doi.org/10.1109/tmtt.2006.889323.

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3

Kanagala, Sekhar, Faruque Ahamed, Urmila Nath, Shilpa Wakade, and Guru Subramanyam. "Electrical Modeling of Ferroelectric Tunable Microwave Components and Circuits." Ferroelectrics 329, no. 1 (December 2005): 13–21. http://dx.doi.org/10.1080/00150190500314890.

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4

Sorrentino, Roberto, Paola Farinelli, Alessandro Cazzorla, and Luca Pelliccia. "RF-MEMS Application to RF Tuneable Circuits." Advances in Science and Technology 100 (October 2016): 100–108. http://dx.doi.org/10.4028/www.scientific.net/ast.100.100.

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The bursting wireless communication market, including 5G, advanced satellite communication systems and COTM (Communication On The Move) terminals, require ever more sophisticated functions, from multi-band and multi-function operations to electronically steerable and reconfigurable antennas, pushing technological developments towards the use of tunable microwave components and circuits. Reconfigurability allows indeed for reduced complexity and cost of the apparatuses. In this context, RF MEMS (Micro-Electro-Mechanical-Systems) technology has emerged as a very attractive solution to realize bo

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5

Li, Hai-Chao, Hai-Yang Zhang, Qing He, and Guo-Qin Ge. "Nonlinear manipulation of tunable microwave amplification and attenuation in superconducting circuits." EPL (Europhysics Letters) 115, no. 5 (September 1, 2016): 54002. http://dx.doi.org/10.1209/0295-5075/115/54002.

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6

MANSOUR, MOHAMED M., MOSTAFA A. ELMALA, ABDEL-AZIZ T. SHALABY, and EL-SAYED M. EL-RABAIE. "THIN FILM FERROELECTRIC TUNABLE ZEROTH-ORDER RESONATOR BASED ON CRLH METAMATERIALS." Journal of Circuits, Systems and Computers 23, no. 01 (January 2014): 1450013. http://dx.doi.org/10.1142/s0218126614500133.

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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 fine-tuned for optimal performance, with the additional att

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7

Zhong, Wen-Xue, Guang-Ling Cheng, and Ai-Xi Chen. "Coherent control of tunable entanglement between two resonators in superconducting circuits." International Journal of Quantum Information 12, no. 01 (February 2014): 1450009. http://dx.doi.org/10.1142/s0219749914500099.

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We present an efficient method to generate Einstein–Podolsky–Rosen (EPR) entanglement of two microwave photons with different frequencies in two superconducting resonators. Our scheme is based on the sideband couplings of two resonators with a single gap-tunable superconducting quantum circuits driven by a controlled field. By the proper choice of the physical parameters, the nonlinear interaction of parametric down-conversion occurs between two resonators while the superconducting qubit remains in the original state, which is responsible for the entanglement generation. The present scheme wou

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Kapitanova, Polina, Dmitry Kholodnyak, Stefan Humbla, Ruben Perrone, Jens Mueller, Matthias A. Hein, and Irina Vendik. "Tunable microwave devices based on left/right-handed transmission line sections in multilayer implementation." International Journal of Microwave and Wireless Technologies 1, no. 4 (June 25, 2009): 323–29. http://dx.doi.org/10.1017/s175907870999033x.

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Metamaterial transmission lines can be realized as a combination of right- and left-handed transmission line (TL) sections exhibiting positive and negative dispersion. This approach gives additional degrees of freedom for improving the performance of microwave devices. Artificial right- and left-handed sections, which are based on lumped-element unit cells consisting of inductance and capacitances (LC-cells), are used. This makes it possible to decrease dimensions of the devices drastically. Furthermore, using variable capacitors in LC-cells allows designing tunable devices. This paper present

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9

Wu, Kun, Guangling Cheng, and Aixi Chen. "Tunable asymmetric Einstein–Podolsky–Rosen steering of microwave photons in superconducting circuits." Journal of the Optical Society of America B 37, no. 2 (January 14, 2020): 337. http://dx.doi.org/10.1364/josab.382881.

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10

Evseev, Vladimir, Mikhail Ivlev, Elena Lupanova, Sergey Nikulin, Vitaliy Petrov, and Andrey Terentyev. "Automation of S-parameters measurements of high-power microwave transistors in a contact device with tunable strip matching circuits." ITM Web of Conferences 30 (2019): 11002. http://dx.doi.org/10.1051/itmconf/20193011002.

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In the practice by microwave power transistor amplifiers developing, the variable load method is usually used to determine the impedances of matching circuits in the complex conjugate matching mode. This solution involves the use of expensive equipment - coaxial impedance tuners and contact devices for mounting transistors in low impedance strip lines. An even more complicated and expensive way is the concept of X- parameters, based on the use of unique measuring equipment - a non-linear vector network analyzer, and a simulator for non-linear circuits design. The article proposes an alternativ

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11

XU, HONGTAO, NADIA K. PERVEZ, and ROBERT A. YORK. "TUNABLE MICROWAVE INTEGRATED CIRCUITS USING BST THIN FILM CAPACITORS WITH DEVICE STRUCTURE OPTIMIZATION." Integrated Ferroelectrics 77, no. 1 (December 2005): 27–35. http://dx.doi.org/10.1080/10584580500413681.

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12

Tao, Rui, Xiao-Tao Mo, Zheng-Yuan Xue, and Jian Zhou. "Practical one-step synthesis of multipartite entangled states on superconducting circuits." International Journal of Quantum Information 17, no. 07 (October 2019): 1950051. http://dx.doi.org/10.1142/s0219749919500515.

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Quantum entanglement is an important resource for quantum information processing tasks. However, realistic multipartite entangled state production is very difficult. In this paper, we propose an efficient single-step scheme for generating many body Greenberger–Horne–Zeilinger (GHZ) states on superconducting circuits by using a superconducting transmission-line resonator (TLR) interact with [Formula: see text] superconducting transmon qubits. The distinct merit of our proposal is that it does not require the qubit-resonator coupling strengths to be the same, which is usually impractical experim

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13

Edward, N., N. A. Shairi, Z. Zakaria, Tole Sutikno, and I. D. Saiful Bahri. "Tunable function of feeding network and SPDT switch for WIMAX application." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 3 (June 1, 2019): 1574. http://dx.doi.org/10.11591/ijeecs.v14.i3.pp1574-1580.

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<p>A tunable circuit that functions as a power divider and a single pole double throw (SPDT) switch is proposed in this paper. The power divider design was based on the conventional Wilkinson power divider (WPD). Since WPD design has wideband properties, a modification was made in the design to make it narrowband so that it will only work for WiMAX applications. Two shorted stubs were introduced in the transmission line of the output ports to encounter the mismatch when the function was switched to an SPDT switch. Rogers RO4350 (er = 3.48, h = 0.508mm) was used as a substrate material an

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14

Nesimoglu, Tayfun, and Cumali Sabah. "A Tunable Metamaterial Resonator Using Varactor Diodes to Facilitate the Design of Reconfigurable Microwave Circuits." IEEE Transactions on Circuits and Systems II: Express Briefs 63, no. 1 (January 2016): 89–93. http://dx.doi.org/10.1109/tcsii.2015.2503058.

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15

Vorobiev, Andrei, and Spartak Gevorgian. "Enhanced tunable performance of high Q-factor BaxSr1−xTiO3 film bulk acoustic wave resonators." International Journal of Microwave and Wireless Technologies 5, no. 3 (April 15, 2013): 361–69. http://dx.doi.org/10.1017/s1759078713000317.

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Emerging intrinsically tunable film bulk acoustic wave(BAW) resonators allow the development of new generation reconfigurable and agile microwave circuits. In this paper, we demonstrate the enhancement of tunable performance of the high Q-factor BaxSr1−xTiO3 BAW – solidly mounted resonators (BAW–SMR) by varying Ba concentration. The Ba0.5Sr0.5TiO3 BAW–SMR reveal tunability of series resonance frequency up to 2.4%, electromechanical coupling coefficient up to 7.5% and rather high Q-factor, up to 250 at 5.3 GHz. Correlations between the measured electroacoustic parameters are analyzed using the

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16

Yasir, Muhammad, Pietro Zaccagnini, Gianluca Palmara, Francesca Frascella, Niccolò Paccotti, and Patrizia Savi. "Morphological Characterization and Lumped Element Model of Graphene and Biochar Thick Films." C 7, no. 2 (March 27, 2021): 36. http://dx.doi.org/10.3390/c7020036.

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Carbon based materials exhibit interesting mechanical, thermal and electrical properties which make them excellent contenders for use as fillers in composites as film. Graphene has been vastly used among the carbon-based materials. More recently eco-friendly carbon-based materials like biochar have emerged. The deployment of carbon-based materials in films needs to be studied since films are more versatile and permit the exploitation of electrical properties of such materials over circuits and systems. Typical circuits and systems exploiting electrical properties of novel materials perform a n

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17

Bisharat, Dia’aaldin J., and Daniel F. Sievenpiper. "Manipulating line waves in flat graphene for agile terahertz applications." Nanophotonics 7, no. 5 (May 24, 2018): 893–903. http://dx.doi.org/10.1515/nanoph-2017-0133.

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AbstractReducing open waveguides enabled by surface waves, such as surface plasmon polaritons, to a one-dimensional line is attractive due to the potentially enhanced control over light confinement and transport. This was recently shown to be possible by simply interfacing two co-planar surfaces with complementary surface impedances, which support transverse-magnetic and transverse-electric modes, respectively. Attractively, the resultant “line wave” at the interface line features singular field enhancement and robust direction-dependent polarizations. Current implementations, however, are lim

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18

Yasir, Muhammad, and Patrizia Savi. "Dynamically Tunable Phase Shifter with Commercial Graphene Nanoplatelets." Micromachines 11, no. 6 (June 20, 2020): 600. http://dx.doi.org/10.3390/mi11060600.

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In microwave frequency band the conductivity of graphene can be varied to design a number of tunable components. A tunable phase shifter based on commercial graphene nanoplatelets is introduced. The proposed configuration consists of a microstrip line with two stubs connected with a taper. On each side of the stubs there is a gap, short circuited through a via, where the commercial graphene nanoplatelets are drop casted. By applying a DC bias voltage that alters the graphene resistance the phase of the transmitted signal through the microstrip line can be varied. In order to maximize the phase

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19

Spiegel, Judith, and Isabelle Huynen. "Microwave Properties of Ferromagnetic Nanowires and Applications to Tunable Devices." Solid State Phenomena 152-153 (April 2009): 389–93. http://dx.doi.org/10.4028/www.scientific.net/ssp.152-153.389.

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Microwave devices as circulators or tunable filters demand nowadays small size and broad bandwidth. Ferromagnetic nanowired membranes are ideal candidates for this purpose. This paper focuses on the dielectric properties of such substrates, as influenced by the ferromagnetic nature of nanowires and their filling factor. Two particular cases are considered: a membrane filled up to its top with nanowires, forming a one-layer substrate, and a membrane filled up to a certain percentage of its height with nanowires, forming a two-layer substrate. The models proposed in this paper for each case take

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20

PANTOLI, LEONARDO, VINCENZO STORNELLI, and GIORGIO LEUZZI. "TUNABLE ACTIVE FILTERS FOR RF AND MICROWAVE APPLICATIONS." Journal of Circuits, Systems and Computers 23, no. 06 (May 14, 2014): 1450088. http://dx.doi.org/10.1142/s0218126614500881.

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In this paper, we present a low-voltage tunable active filter for microwave applications. The proposed filter is based on a single-transistor active inductor (AI), that allows the reduction of circuit area and power consumption. The three active-cell bandpass filter has a 1950 MHz center frequency with a -1 dB flat bandwidth of 10 MHz (Q ≈ 200), a shape factor (30–3 dB) of 2.5, and can be tuned in the range 1800–2050 MHz, with constant insertion loss. A dynamic range of about 75 dB is obtained, with a P1dB compression point of -5 dBm. The prototype board, fabricated on a TLX-8 substrate, has a

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21

A. Elwi, Taha. "Nano-Scale Vee Yagi-UDA Antenna Based Nano Shell-Silver Coated Silica for Tunable Solid –State Laser Applications." DJES 12, no. 1 (March 1, 2019): 1–6. http://dx.doi.org/10.24237/djes.2019.12101.

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A numerical study on the performance of the nano-scale antenna based on VeeYagi-Uda geometry that is constructed from Nano Shell-Silver Coated Silica (NSSCS) chains is investigated for tunable solid-state laser applications. In this study, a Finite Integral Technique (FIT) based on the formulations of Computer Simulator Technology-MicroWave Studio (CST MWS) software package is invoked to evaluate the antenna parameters such as: Reflection coefficient (S11), gain/ directivity, and directivity. Before conducting the simulation study, the refractive index properties of the NSSCS are evaluated acc

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22

Al-Yasir, Yasir I. A., Naser Ojaroudi Parchin, Yuxiang Tu, Ahmed M. Abdulkhaleq, Issa T. E. Elfergani, Jonathan Rodriguez, and Raed A. Abd-Alhameed. "A Varactor-Based Very Compact Tunable Filter with Wide Tuning Range for 4G and Sub-6 GHz 5G Communications." Sensors 20, no. 16 (August 13, 2020): 4538. http://dx.doi.org/10.3390/s20164538.

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A very compact microstrip reconfigurable filter for fourth-generation (4G) and sub-6 GHz fifth-generation (5G) systems using a new hybrid co-simulation method is presented in this manuscript. The basic microstrip design uses three coupled line resonators with λ/4 open-circuited stubs. The coupling coefficients between the adjacent and non-adjacent resonators are used to tune the filter at the required center frequency to cover the frequency range from 2.5 to 3.8 GHz. The coupling coefficient factors between the adjacent resonators are adjusted to control and achieve the required bandwidth, whi

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23

Zhou, Hao-Miao, Jing Lian, and Feng-Jie Zhu. "The lumped equivalent circuit model of the multi-passband tunable microwave magnetoelectric filters." Journal of Applied Physics 116, no. 6 (August 14, 2014): 063904. http://dx.doi.org/10.1063/1.4892938.

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24

Zhou, Hao-Miao, Qiu-Shi Zhang, Jing Lian, and Xiao-Hong Li. "A Lumped Equivalent Circuit Model for Symmetrical T-Shaped Microstrip Magnetoelectric Tunable Microwave Filters." IEEE Transactions on Magnetics 52, no. 10 (October 2016): 1–9. http://dx.doi.org/10.1109/tmag.2016.2577550.

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25

Krival’, I. I., A. I. Skripnyuk, A. V. Rudkovskiy, V. A. Protsenko та O. A. Prisyazhnyuk. "Aspects of modernization of UA Ч3-101 frequency meter". Технология и конструирование в электронной аппаратуре, № 1-2 (2020): 3–7. http://dx.doi.org/10.15222/tkea2020.1-2.03.

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JSC «Meridian» n. a. S. P. Korolyov at one point developed and mass-produced a wide-range microwave frequency meter of the 8-mm wavelength range UA Ч3-101. Over time, however, the device has become obsolete for a number of reasons, and the question arose of the need to replace it. Since the cost of foreign models of frequency meters with similar parameters available on the market is quite high, the enterprise’s capabilities in solving this issue were considered. The analysis showed that the development of a new similar frequency meter will also be quite expensive, but the modernization of the

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26

Herrmann, Johannes, Marc A. Appleton, Kento Sasaki, Yasuaki Monnai, Tokuyuki Teraji, Kohei M. Itoh, and Eisuke Abe. "Polarization- and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond." Applied Physics Letters 109, no. 18 (October 31, 2016): 183111. http://dx.doi.org/10.1063/1.4967378.

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27

Zhou, Hao-Miao, and Jing Lian. "A generalized lumped-element equivalent circuit for tunable magnetoelectric microwave devices with multi-magnetoelectric laminates." Journal of Applied Physics 115, no. 19 (May 21, 2014): 193908. http://dx.doi.org/10.1063/1.4878160.

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28

Arnedo, Israel, Iván Arregui, Magdalena Chudzik, Fernando Teberio, Aintzane Lujambio, David Benito, Txema Lopetegi, and Miguel A. G. Laso. "Passive Microwave Component Design Using Inverse Scattering: Theory and Applications." International Journal of Antennas and Propagation 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/761278.

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We briefly review different synthesis techniques for the design of passive microwave components with arbitrary frequency response, developed by our group during the last decade. We provide the theoretical foundations based on inverse scattering and coupled-mode theory as well as several applications where the devices designed following those techniques have been successfully tested. The main characteristics of these synthesis methods are as follows. (a) They are direct, because it is not necessary to use lumped-element circuit models; just the target frequency response is the starting point. (

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29

Cenac, A., L. Nenert, L. Billonnet, B. Jarry, and P. Guillon. "MMIC broadband analog phase shifter and gain circuit for frequency-tunable microwave planar multipole active filter categories." Microwave and Optical Technology Letters 25, no. 5 (June 5, 2000): 311–18. http://dx.doi.org/10.1002/(sici)1098-2760(20000605)25:5<311::aid-mop7>3.0.co;2-f.

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30

Harz, Thomas, Thomas Kleine-Ostmann, and Thorsten Schrader. "Design of a continuously tunable reflectarray element for 5G metrology in the k-band." Advances in Radio Science 18 (December 10, 2020): 1–5. http://dx.doi.org/10.5194/ars-18-1-2020.

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Abstract. We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only one single varactor diode. The simplified design and the small needed space make it usable for k-band reflectarrays with many elements. The functionality of the reflectarray element is explained and the crucial parts are analyzed. The approach to get a full phase shift is discussed in detail. A bias-T is developed to provide the control voltage

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31

Skuratovskiy, I., O. Khazov, and A. Shakhova. "A resonant short-circuit plunger as part of tunable waveguide-dielectric and waveguide-coaxial resonators built around cylindrical evanescent waveguides." RADIOFIZIKA I ELEKTRONIKA 26, no. 2 (2021): 46–53. http://dx.doi.org/10.15407/rej2021.02.046.

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Subject and Purpose. Tunable resonant structures make numerous microwave devices, among which are waveguide-dielectric and waveguide-coaxial resonators (WDR and WCR) built around cylindrical evanescent waveguides and involving a resonant short-circuit (RSC) plunger for tuning purposes. The present paper seeks to study specific features of the RSC-plunger operation in the evanescent waveguide and estimate the RSC-plunger efficiency. Method and Methodology. The RSC-plunger efficiency is approximately estimated in terms of the transmission line theory. Comparative experimental verification of the

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32

Bernigaud, J. F., P. Laurent, N. Martin, C. Quendo, G. Tanne, B. Della, F. Huret, and Ph Gelin. "Implementation of tunable microwave planar circuits based on liquid crystal." Frequenz 61, no. 9-10 (January 1, 2007). http://dx.doi.org/10.1515/freq.2007.61.9-10.224.

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33

Chapman, Benjamin J., Eric I. Rosenthal, Joseph Kerckhoff, Bradley A. Moores, Leila R. Vale, J. A. B. Mates, Gene C. Hilton, Kevin Lalumière, Alexandre Blais, and K. W. Lehnert. "Widely Tunable On-Chip Microwave Circulator for Superconducting Quantum Circuits." Physical Review X 7, no. 4 (November 22, 2017). http://dx.doi.org/10.1103/physrevx.7.041043.

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34

Dionne, Gerald F., and Daniel E. Oates. "Ferrite Properties and Technology Issues for Improved Microwave Systems." MRS Proceedings 833 (2004). http://dx.doi.org/10.1557/proc-833-g4.6.

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ABSTRACTMicrowave device engineers continually seek materials advances to improve performance of magnetic components at reduced size and cost. Wherever possible, microstrip or stripline device configurations are adopted in preference to bulky waveguide structures. In radar and communications applications, the nonreciprocal propagation properties of ferrites are essential for realizing phase shifters, circulators, isolators, and power limiters. The introduction of superconductor circuits has led to the development of very low-loss phase shifters and circulators. Recent demonstrations of tuning

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35

Alzahrani, S., and T. S. Kalkur. "A Tunable Bandstop Filter Using Thin Film Barium-Strontium-Titanate Varactors." MRS Proceedings 1691 (2014). http://dx.doi.org/10.1557/opl.2014.745.

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AbstractFerroelectric barium-strontium-titanate (BST) varactors are becoming extremely important particularly for frequency-agile RF and microwave circuits. Tunable bandstop filters are desired to eliminate unwanted signals for several communication systems. In this paper, a compact tunable bandstop filter (BSF) based on a single hairpin resonator, using ferroelectric BST varactors, is also presented. The frequency response of proposed BSF can be adjusted by increasing or decreasing the length, width, and space for the coupled line hairpin resonator. One pair of variable capacitors has been in

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McKnight, Stephen W., Steven A. Oliver, Hoton How, and Carmine Vittoria. "Planar Ferrite Materials for Millimeter-Wave Applications." MRS Proceedings 631 (2000). http://dx.doi.org/10.1557/proc-631-aa2.4.

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ABSTRACTTransferred-film technology provides a path to the integration of self-biased hexaferrite film devices into MMIC circuits. While progress is being made on the growth of thick oriented films of barium hexaferrite doped with aluminum and scandium by pulsed laser deposition or liquidphase epitaxy, we have demonstrated prototype devices using available yttrium-iron-garnet films and thinned bulk hexaferrites. Insertion losses less than 2dB and isolation greater than 20dB have been demonstrated, and theoretical modeling indicates that insertion losses less than 0.5 dB are accessible with opt

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Oates, D. E., A. C. Anderson, and G. F. Dionne. "Magnetically Tuned Superconducting Filters." MRS Proceedings 603 (1999). http://dx.doi.org/10.1557/proc-603-113.

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AbstractWe have demonstrated magnetically tunable superconducting filters consisting of microwave circuits coupled to ferrite substrates in monolithic structures using both niobium at 4 K and YBCO at 77 K. A three-pole 1% bandwidth filter with 10-GHz center frequency, 1-dB insertion loss, and greater than 10% tunability has been demonstrated. Operation of the ferrite in the partially magnetized state prevents degradation of the surface resistance of the superconductor. This technology has the potential for compact, light weight, multipole filters with very low insertion loss, <0.5 dB, and v

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38

Horwitz, J. S., J. M. Pond, B. Tadayan, R. C. Y. Auyeung, P. C. Dorsey, D. B. Chrisey, S. B. Qadri, and C. Muller. "SrxBa(1−x)TiO3 Thin Films for Active Microwave Applications." MRS Proceedings 361 (1994). http://dx.doi.org/10.1557/proc-361-515.

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ABSTRACTThe dielectric constant, loss tangent and Curie temperature for SrxBa(1−x)TiO3 (SBT) thin films with x = 0.2 – 0.8 have been investigated at microwave frequencies. SBT films (0.5 -3 μm thick) were grown on (100) MgO and LaAlO3 substrates by pulsed laser deposition at substrate temperatures from 850 – 900 °C in 0.35 Torr of oxygen. Deposited ferroelectric films were single phase, highly oriented, and characterized by x-ray rocking curve widths of < 0.5°. Highly oriented SBT films with x-ray rocking curve widths of 72 arc seconds were observed. In general, the thin film dielectric con

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Chang, W., J. S. Horwitz, J. M. Pond, S. W. Kirchoefer, and D. B. Chrisey. "Pulsed Laser Deposition of BaxSr1-xTiO3 Thin Films for Frequency Agile Microwave Electronics." MRS Proceedings 526 (1998). http://dx.doi.org/10.1557/proc-526-205.

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AbstractOriented, single phase thin films (~5000Å thick) of BaxSr1-xTiO3 (BST) have been deposited on to (100) MgO and LaAlO3 (LAO) single crystal substrates using pulsed laser deposition (PLD). A strong correlation is observed between the microstructure of the deposited film and the dielectric tuning and loss at microwave frequencies. Microstructural defects observed in as deposited films include strain, due to film substrate lattice mismatch and oxygen and cation vacancies. Compensation of the ablation target with excess Ba and Sr is observed to increase the dielectric constant and to reduce

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40

Marson, Ryan, Bijoy K. Kuanr, Sanjay R. Mishra, Robert E. Camley, and Zbigniew Celinski. "Novel Planer Microwave Circuit Applications and Characterization of Ni Nanowires." MRS Proceedings 1058 (2007). http://dx.doi.org/10.1557/proc-1058-jj03-06.

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ABSTRACTArrays of Ni nanorods were electrodeposited into alumina oxide templates with various lengths (11-50 micro meter) and fixed pore diameter (150 nm). The magnetization behavior of these rods were investigated with ferromagnetic resonance (FMR) techniques; fixed frequency (conventional FMR) and swept frequency (Network Analyzer FMR). Both resonance spectra indicate the presence of strong dipolar interaction between the nanorods. The fundamental magnetic parameters like spontaneous magnetization, gyromagnetic ratio, and magnetic anisotropies of the nanorods were derived from the angular va

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Miranda, F. A., C. H. Mueller, F. W. Van Keuls, and R. R. Romanofsky. "Evaluation of Ferroelectric BaxSr1−xTiO3 Thin Films Driven by Phase Shifters for Reflectarray Applications." MRS Proceedings 656 (2000). http://dx.doi.org/10.1557/proc-656-dd1.3.

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ABSTRACTThe application of ferroelectric thin films for the development of frequency and phase agile microwave components has been the reason behind very encouraging demonstrations of tunable microwave devices in recent years. Thus, one could conclude with basically a general consensus, that the question of the suitability of thin film ferroelectric technology for the fabrication of superior tunable microwave components has been already answered in a favorable way. However, what is still pending in regards to the validation of this technology is the development of evaluation methodologies to s

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Dionne, Gerald F. "Ferrites for Tunable RF and Microwave Devices." MRS Proceedings 603 (1999). http://dx.doi.org/10.1557/proc-603-71.

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AbstractMicrowave systems for communications and radar require control of propagation of the rf signal. Devices that accomplish this function include phase shifters, isolators and circulators, and tunable filters. In many instances, these devices are magnetic and are based on the variable permeability of electrically insulating ferrimagnetic oxides (ferrites). Recent advances in microwave ferrite devices have featured superconductor circuitry that promises to virtually eliminate insertion losses due to rf surface resistance. Lower conduction losses allow the use of small lightweight microstrip

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Tilmans, Harrie A. C. "RF-MEMS: Materials and technology, integration and packaging." MRS Proceedings 783 (2003). http://dx.doi.org/10.1557/proc-783-b6.6.

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ABSTRACTMEMS technology is rapidly emerging as an enabling technology to yield a new generation of highperformance RF-MEMS passives, like switches, tunable capacitors, high-Q resonators and tunable filters. This paper presents the progress in RF-MEMS device and package development with focus on relevant technology and material issues. The importance of wafer-level or 0-level packaging of the RF-MEMS devices is elucidated. Examples of 1-level packaging, e.g., chip-on-board or plastic molded 1-level package, are briefly described. The paper concludes in stipulating how integration of RF-MEMS pas

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Zeytinoğlu, S., M. Pechal, S. Berger, A. A. Abdumalikov, A. Wallraff, and S. Filipp. "Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics." Physical Review A 91, no. 4 (April 30, 2015). http://dx.doi.org/10.1103/physreva.91.043846.

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Xiao, Zhicheng, and Andrea Alù. "Tailoring exceptional points in a hybrid PT-symmetric and anti-PT-symmetric scattering system." Nanophotonics, July 26, 2021. http://dx.doi.org/10.1515/nanoph-2021-0245.

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Abstract Fano resonances feature an asymmetric lineshape with controllable linewidth, stemming from the interplay between bright and dark resonances. They provide efficient opportunities to shape the scattering lineshape, but they usually lack flexibility and tunability and are hindered by loss in passive systems. Here, we explore a hybrid parity-time (PT) and anti-parity-time (APT) symmetric system supporting unitary scattering features with highly tunable Fano resonances. The PT-APT-symmetric system can be envisioned in nanophotonic and microwave circuit implementations, allowing for real-ti

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Mahmud, Ali, T. S. Kalkur, and N. Cramer. "RF Magnetron Sputtered Ba0.96Ca0.04Ti0.84Zr0.16O3 Thin Films for High Frequency Applications." MRS Proceedings 833 (2004). http://dx.doi.org/10.1557/proc-833-g1.2.

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ABSTRACTPerovskite ferroelectric thin films in the paraelectric state exhibit outstanding dielectric properties, even at high frequencies (>1 GHz). The tunable dielectric constant of ferroelectric thin films can be used to design frequency and phase agile components. High dielectric constant thin film ferroelectric materials in the paraelectric state have received enormous attention due to their feasibility in applications such as decoupling capacitors and tunable microwave capacitors; the latter application has been fueled by the recent explosion in wireless and satellite communications. T

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Ahrenkiel, Richard K., and B. Lojek. "Analysis of Ion Implantation Damage in Silicon Wafers by a Contactless Microwave Diagnostic." MRS Proceedings 699 (2001). http://dx.doi.org/10.1557/proc-699-r4.2.

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AbstractRapid thermal annealing (RTA) of lattice damage created by heavy ion implantation damage is required to maintain the integrity of semiconductor material used for submicron-integrated circuit devices. A quick, efficient, and contactless diagnostic of the implantation damage is highly desirable in both research and production environments. A contactless measurement technique has been recently applied to this problem that uses a deeply penetrating low-frequency microwave probe frequency operating at 420 MHz. Here, we will demonstrate the use of this high frequency resonance-coupled photoc

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Grishin, Alexander M., Jang-Yong Kim, and Sergey I. Khartsev. "Processing and On-Wafer Measurements of Ferroelectric Interdigitated Tunable Microwave Capacitors." MRS Proceedings 811 (2004). http://dx.doi.org/10.1557/proc-811-d10.1.

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ABSTRACTNa0.5K0.5NbO3 (NKN) and Pb(Zr0.53Ti0.47)O3 (PZT) films have been grown by rf-magnetron sputtering and pulsed laser deposition techniques, correspondingly, on sapphire (Al2O3-0112, rcut), YAlO3 + 1% Nd (Nd:YAlO3-001), and quartz (Y+36°-cut) single crystal substrates. Interdigital capacitor (IDC) of coplanar waveguide (CPW) structures were defined by a standard lift off technique in a Au(0.5μm)/Cr(10nm) electrode electron beam evaporated on ferroelectric film surface. IDCs consisted of five pairs of fingers separated by 2 and 4 μm gap. On-wafer microwave characterization was performed us

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Kim, Dongsu, Yoonsu Choi, Mark G. Allen, J. Stevenson Kenney, David W. Stollberg, and David Kiesling. "An S-Band Reflection-Type Phase Shifter - A Design Example Using Ferroelectrics." MRS Proceedings 720 (2002). http://dx.doi.org/10.1557/proc-720-h5.3.

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AbstractOne of the challenges faced in using ferroelectrics in high frequency devices is how to effectively use the material in a circuit design. A compact reflection-type phase shifter fabricated on sapphire substrates coated with ferroelectric barium strontium titanate (BST) thin-films has been built which shows the promise of using BST thin films in the design of tunable microwave devices. The phase shifter, fabricated as one monolithic assembly, consists of a 3dB coupler, meandered line inductors and tunable interdigital capacitors. A continuously variable phase shift range of more than 10

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Noda, Minoru, Daniel Popovici, Masanori Okuyama, Yoshinobu Sasaki, and Makio Komaru. "An Application of a Low-Loss MOD-Made BST Film Developed Especially with PLD Initial Nucleation Layer to a 20 GHz Tunable Phase Shifter." MRS Proceedings 833 (2004). http://dx.doi.org/10.1557/proc-833-g1.5.

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ABSTRACTBarium Strontium Titanate (BST) thin films have been deposited on (100)-oriented MgO substrate by combining preparation of initial layer by Pulsed Laser Deposition and main layer by Metal-Organic-Decomposition method. Films with an initial layer of 20, 30 and 40 nm thickness and final thickness of 400, 650 and 800 nm have been obtained. Physical and dielectric properties of the BST thin films have been characterized from the viewpoint of frequency-agile micro and millimeter wave circuit applications. The results reveal that Ba0.6Sr0.4TiO3 thin films have a good crystallinity with chara

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