| 1. |
- Carlsson, Erik F., 1968, et al.
(författare)
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Effects of package width on K-band high-temperature superconducting filters
- 1995
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Ingår i: Microwave and Optical Technology Letters. - : Wiley. - 1098-2760 .- 0895-2477. ; 10:6, s. 315-317
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Tidskriftsartikel (refereegranskat)abstract
- The effect of substrate/package width on filter performance is demonstrated and discussed for 18-GHz packaged filters using high-temperature superconducting (HTS), coupled microstrip lines. The filters are made of 0.3-μm YBa2Cu3O7 – ∂8 (YBCO) on MgO substrates with copper ground planes. The HTS filter shows a minimum insertion loss (IL) of 0.9 dB, steep skirts, and very good out-of-band rejection (> 45 dB up to 21 GHz) at 77 K with a bandwidth of 2.8% and a 0.3-dB ripple
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| 2. |
- Gevorgian, Spartak, 1948, et al.
(författare)
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CAD Model of a Gap in a Coplanar Waveguide
- 1996
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Ingår i: International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering. - 1050-1827. ; 6:5, s. 369-377
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Tidskriftsartikel (refereegranskat)abstract
- The partial capacitance approach and conformal mapping techniques are used to evaluate simple closed-form models for parallel and series capacitances of equivalent π-network of a symmetric gap in a CPW. Models are compared with experimental data and full wave analysis. They are useful for a wide range of CPW parameters and frequencies.
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| 3. |
- Gevorgian, Spartak, 1948, et al.
(författare)
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CAD models for multilayered substrate interdigital capacitors
- 1996
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Ingår i: IEEE Transactions on Microwave Theory and Techniques. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9480 .- 1557-9670. ; 44:6, s. 896 - 904
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Tidskriftsartikel (refereegranskat)abstract
- Conformal mapping-based models are given for interdigital capacitors on substrates with a thin superstrate and/or covering dielectric film. The models are useful for a wide range of dielectric constants and layer thicknesses. Capacitors with finger numbers n⩾2 are discussed. The finger widths and spacing between them may be different. The results are compared with the available data and some examples are given to demonstrate the potential of the models
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| 4. |
- Gevorgian, Spartak, 1948, et al.
(författare)
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CAD Models for Shielded Multilayered CPW
- 1995
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Ingår i: IEEE Transactions on Microwave Theory and Techniques. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9480 .- 1557-9670. ; 43:4, s. 772-779
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Tidskriftsartikel (refereegranskat)abstract
- Conformal mapping technique is used to obtain CAD oriented closed form analytical expressions for characteristic impedance per unit length capacitance and relative effective dielectric permittivity of top and bottom shielded multilayered coplanar waveguides (CPW). Analytical expressions are deduced for a wide verity of CPW structures
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| 5. |
- Gevorgian, Spartak, 1948, et al.
(författare)
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Lower order modes of YBCO/STO/YBCO circular disk resonators
- 1996
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Ingår i: IEEE Transactions on Microwave Theory and Techniques. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9480 .- 1557-9670. ; 44:10, s. 1738 - 1741
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Tidskriftsartikel (refereegranskat)abstract
- Lower order modes in a single crystal strontium titanate (STO) circular disk resonator are studied experimentally. Superconducting epitaxial YBCO films form the parallel-plates of the resonator. Due to the extremely high dielectric constant of STO, the electric fields are concentrated between the plates, while there is a substantial magnetic fringing field which affects both the resonant frequencies, Q-factors, and tunability of all modes, especially the TM110 and TM210
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