| 1. |
- Deleniv, Anatoli, 1969
(författare)
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Analysis of trcuncated 2D periodic structures
- 2005
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Ingår i: IEEE MTT-S International Microwave Symposium Digest. - 0149-645X. ; , s. 1071-1074
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Tidskriftsartikel (refereegranskat)abstract
- A multiport admittance/impedance matrix for the truncated 2D periodic structure is derived via expansion of node voltages and currents in terms of Floquet`s waves. It is shown that for uniaxial propagation, the structure comprised of a finite number of columns/rows is identical to multicoupled lines with properly defined parameters. The 4x4 unit cell array fed at different sides is analyzed using the developed formulation. The results are then verified with a rigorous Sonnet simulation, thereby confirming the validity of the presented approach
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| 2. |
- Deleniv, Anatoli, 1969, et al.
(författare)
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Characterization Accuracy of High-Q Reactors Using Broadband Reflection/Transmission Measurement Techniques
- 2006
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Ingår i: Proceedings of EUMC 2006, 10-15 Sept. 2006, Manchester, UK. ; , s. 975-979
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Konferensbidrag (refereegranskat)abstract
- Characterization accuracy of high-Q reactors due to measurement uncertainties is analyzed in this paper. Two broadband techniques based on reflection and transmission type measurements are considered. A differential calculus combined with an equivalent circuit representation of the measurement error are used here to derive simple analytic formulas. It is shown that the accuracy of calibrated VNA is insufficient to obtain accurate loss data. A measurement procedure is proposed that improves the accuracy of loss measurement. A measurement example is given demonstrating the utility of the above approach.
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| 3. |
- Deleniv, Anatoli, 1969
(författare)
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Characterization Techniques for Thin and Thick Ferroelectric Films
- 2007
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Ingår i: Journal of the European Ceramic Society. - : Elsevier BV. - 1873-619X .- 0955-2219. ; 27:8-9, s. 2759-2764
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Tidskriftsartikel (refereegranskat)abstract
- A few measurement techniques are presented for characterization of thin and thick ferroelectric films at microwave frequencies. Broadband reflection type measurements using a probe station are considered for on wafer characterization of thin films. The accuracy of the method is analyzed with respect to measurement residual systematic errors. A test structure is introduced allowing quick and accurate extraction of the film parameters based on the rigorous full-wave model. Two measurement techniques are reported for electrode-less characterization of thick ferroelectric films. The first method (X-band) is based on the reflection type measurement of a resonator established by a layered alumina/ferroelectric sample loaded in a cut-off waveguide. The second method (B-band) utilizes an open resonator (OR) technique. Theoretical and experimental results are presented.
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| 4. |
- Deleniv, Anatoli, 1969, et al.
(författare)
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Design of the Compact Band-Pass Filter Utilizing Dielectric Loaded
- 2007
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Ingår i: 37th European Microwave Conference, EUMC; Munich; Germany; 9 October 2007 through 12 October 2007. - 9782874870033 ; 2, s. 886-889
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Konferensbidrag (refereegranskat)abstract
- A design of a compact Ku-band four pole band-pass filter is reported. The filter is based on twodual-mode dielectric loaded waveguide (WG) resonators providing a significant reduction of the sizesas compared to its single mode counterpart. Each resonator is comprised of a square shaped cut-offwaveguide loaded with a silica glass plate. The filter is realized using a quadruplet cell, which allowstwo symmetric transmission poles to be placed at an arbitrary distance from the pass-band edges. Thisis a welcome feature making this filter useful for both Tx and Rx duplexer channels. A number ofnumerical issues are addressed concerning the modelling using High Frequency Structure Simulator(HFSS). Experimental results are compared with the simulations validating the design approach.
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| 5. |
- Deleniv, Anatoli, 1969, et al.
(författare)
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Experimental characterization of the 3rd order nonlinearities in thin film parallel-plate ferroelectric varactors
- 2007
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Ingår i: IEEE MTT-S International Microwave Symposium Digest. - 0149-645X. - 1424406889 ; 2, s. 683-686
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Konferensbidrag (refereegranskat)abstract
- The 3rd order nonlinearities in parallel-plate ferroelectric varactors based on thin Ba0.25Sr0.75TiO3 epitaxial films are characterized in wide temperature range. Both, the generated 3rd order harmonic and 3rd order intermodulation products are measured experimentally. The 3rd harmonic IP3 at room temperature is measured to be 35dBm and is favorable as compared to semiconductor competitors. The good agreement between harmonic balance simulation and measured data indicate that the measured low frequency C-V is adequate for accurate design of nonlinear components.
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| 6. |
- Deleniv, Anatoli, 1969
(författare)
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Full wave analysis of coupled strip-slot guiding structures
- 2005
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Ingår i: IEEE Transactions on Microwave Theory and Techniques. - 0018-9480 .- 1557-9670. ; 53:6( 1), s. 1904-1912
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, the coupled strip-slot lines are modeled using hybrid mode analysis. Standard spectral-domain analysis is employed to solve the eigenvalue problem in multilayered media and a novel formulation is proposed to obtain strip and slot modal impedances. Comparisons with available published data are presented. The model is used to obtain scattering parameters of a bandpass filter with a novel topology. These scattering parameters are then compared with those obtained using rigorous Sonnet simulations, thereby confirming the reliability of the model.
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| 7. |
- Deleniv, Anatoli, 1969, et al.
(författare)
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Large area photo detector
- 2011
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- The invention discloses a photo detector with first and second groups of electrodes. The electrodes of each group are connected to a first common conductor for the group, and are located on a layer of photosensitive material. The electrodes are parallel to and interlaced with each other. The first common conductors are essentially plane, arranged at the same end of their group of electrodes, and arranged as upper and lower conductors parallel to and overlapping each other separated by a dielectric material, and form a signal electrode and a ground plane of a first microstrip line. The first microstrip line acts as a first combiner for currents induced in the electrodes of the two groups and as a matching network for the electrodes and for a load which can be connected to the photo detector
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| 8. |
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| 9. |
- Deleniv, Anatoli, 1969, et al.
(författare)
-
Low loss left-handed media using dielectric ring resonators
- 2008
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Ingår i: 38th European Microwave Conference, EuMC 2008; Amsterdam; Netherlands; 27 October 2008 through 31 October 2008. - 9782874870064 ; , s. 1418-1420
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Konferensbidrag (refereegranskat)abstract
- A low loss left handed 1D media using thick film technology is proposed in this work. The design uses a rectangular cut off waveguide periodically loaded by high permittivity dielectric ring resonators. These are considered as a low loss replacement for the split-ring resonators (SRR), responsible for magnetic activity of the media. Simulations are made using eigen-mode solver of HFSS. There the periodic boundary conditions are utilized to emulate the effect of the infinite media. The analysis reveals the propagation of the backward waves below the cut off frequency of the WG indicating left handedness of the propagation media. Another pass-band with the forward wave exists below the cut off of the WG. It is shown that two first pass-bands can be linked so that continuous backward-to-forward transmission is observed.
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| 10. |
- Deleniv, Anatoli, 1969, et al.
(författare)
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LTCC compatible ferroelectric phase shifters
- 2005
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Ingår i: IEEE MTT-S International Microwave Symposium Digest. - 0149-645X. ; 1, s. 599-602
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Tidskriftsartikel (refereegranskat)abstract
- Two phase shifters with novel topologies are presented. The phase shifters are based on LTCC compatible ferroelectric films with er=200, and tand=0.04 at 10 GHz. A Ku-band phase shifter is designed to provide DC bias independent matching in the wide frequency range. It has microstrip design where ferroelectric film is used as a substrate and requires relatively low DC bias voltages. The phase shifter showed -15dB matching in 50% bandwidth and 15deg/dB figure of merit. In X-band phase shifter the ferroelectric film is deposited on the low permittivity substrate. Using such two layered substrate a loaded line phase shifter based on coplanar-plate varactors is realized. The varactors are included in the circuit ground and are connected with the microstrip using vias. This designed allows reduction of overall loss due to more efficient use of ferroelectric. The figure of merit of this phase shifter is 20deg/dB at 10 GHz
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