اصغر کشت کار (عضو هیات‌علمی)

مقالات علمی چاپ شده در مجلات

1. "Fast designing approach for planar graphene filtering leaky-wave antennas"
   Ali Ghajar, Asgar Keshtkar, Saughar Jarchi, Habib Ghorbaninejad
   OPTIK, Vol. 262, 2022
2. "Genetic algorithm design for nonperiodic planar graphene leaky-wave antennas in THz"
   Ali Ghajar, Asgar Keshtkar, Saughar Jarchi, Habib Ghorbaninejad
   INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Vol. 32, pp.1-9, 2022
3. "Analytical design of inhomogeneous flat lenses for high gain applications in an arbitrary direction"
   Hossein Nasrollahi, Mohammad Mahdi Taskhiri, Asgar Keshtkar
   APPLIED OPTICS, Vol. 61, pp.8223-8232, 2022
4. "Multilayer metamaterial graphene sensor with high sensitivity and independent on the incident angle"
   Motahhare Farrokhfar, Saughar Jarchi, Asgar Keshtkar
   OPTIK, Vol. 265, pp.1-11, 2022
5. "Low-profile aperture stacked patch antenna for early-stage breast cancer detection applications"
   Mehdi Mehranpour, Saughar Jarchi, Asgar Keshtkar, Ayaz Ghorbani, Ali Araghi, Mohsen Khalily
   INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Vol. 31, pp.22531-22531, 2021
6. "Planar metamaterial sensor with graphene elliptical rings in transmission mode"
   Motahhare Farrokhfar, Saughar Jarchi, Asgar Keshtkar
   APPLIED OPTICS, Vol. 60, pp.2434-2440, 2021
7. "A novel approach of high-resolution UWB microwave imaging system based on an improved 3D back-projection method for early-stage breast cancer detection applications"
   Mehdi Mehranpour, Saughar Jarchi, A. Ghorbani, Asgar Keshtkar
   International Journal of Microwave and Wireless Technologies, Vol. 13, pp.344-358, 2021
8. "A Frequency Reconfigurable Band-notched UWB Dielectric Resonator Antenna with a Wide-tuning Range for Cognitive Radio Systems"
   Mehdi Abioghli, Asgar Keshtkar, mohammad naser moghadasi, behbood ghalamkari
   IETE JOURNAL OF RESEARCH, Vol. 4, 2021
9. "Complementary Split Ring Resonator Effects on Radiation Pattern Reconfigurable Circular Microstrip Antennas"
   Jafar Fateminasab, Saughar Jarchi, Asgar Keshtkar
   Iranian Journal of Electrical and Electronic Engineering, Vol. 17, 2021
10. "UWB Rectangular DRA Integrated with Reconfigurable Narrowband Antenna for Cognitive Radio Applications"
    mehdi abioghli, Asgar Keshtkar, Mohammad Naser Moghadasi , Behbod Ghalamkari
    IETE JOURNAL OF RESEARCH, Vol. 67, pp.139-147, 2021
11. "Analysis of asymmetrical scattering by a PEC cylinder coated with a ferrite layer"
    Zahra Bahrami, Asgar Keshtkar, AYAZ GHORBANI
    Journal of Computational Electronics, Vol. 19, pp.1597-1605, 2020
12. "Miniaturized on body antenna for small and wearable brain microwave imaging systems"
    , shervin amiri, Asgar Keshtkar
    INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Vol. 30, pp.1-15, 2020
13. "Robust Breast Cancer Imaging Based on a Hybrid Artifact Suppression Method for Early-Stage Tumor Detection"
    Mehdi Mehranpour, Saughar Jarchi, Asgar Keshtkar, Ayaz Ghorbani, Ali Araghi, Okan Yurduseven, Mohsen Khalily
    IEEE Access, Vol. 8, pp.206790-206805, 2020
14. "Predicting the Effects of HPEM Radiation on a Transmission Line Terminated With Linear/ Nonlinear Load in Perforated Metallic Enclosure Using FDDM/VF"
    Ali Kalantarnia, Asgar Keshtkar, ayaz ghorbani
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 48, pp.669-675, 2020
15. "Efficient analysis of metal and dielectric rods in rectangular waveguide with ferrite magnetized transversely"
    Zahra Bahrami, Asgar Keshtkar, ayaz ghorbani, Hector Esteban
    JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, Vol. 34, pp.141-153, 2020
16. "Investigation of Parameters Affecting the Level of Perforated Conductive Enclosure Protection Against HEMP Radiation Using FDDM"
    Ali Kalantarnia, Asgar Keshtkar, ayaz ghorbani
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 48, pp.2115-2124, 2020
17. "A Novel Augmented Railgun Using Permanent Magnets"
    masoud asgari, mohammad bagher heydari, , Asgar Keshtkar, mohsen zofaghari, nilofar jafari
    JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, Vol. 8, pp.99-105, 2019
18. "Isolation enhancement of rectangular dielectric resonator antennas using wideband double slit complementary split ring resonators"
    Maryam Rezapour, Jalil Jalil Rashed-Mohassel, Asgar Keshtkar, Mohammad Naser Moghadasi
    INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Vol. 29, pp.1-11, 2019
19. "Suppression of mutual coupling in rectangular dielectric resonator antenna arrays using Epsilon-Negative metamaterials (ENG)"
    maryam rezapour, jalil rashed mohassel, Asgar Keshtkar, mohammad naser moghadasi
    JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, Vol. 33, pp.1211-1223, 2019
20. "A Novel Structure of Augmented Railgun Using Multilayer Magnets and Sabots"
    mohammad bagher heydari, Masoud Asgari, Asgar Keshtkar
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 47, pp.3320-3326, 2019
21. "Miniaturization of microstrip loop antenna for wireless applications based on metamaterial metasurface"
    Varamini Gohar, Asgar Keshtkar, Mohammad Naser Moghadasi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 83, pp.32-39, 2018
22. "Compact and miniaturized microstrip antenna based on fractal and metamaterial loads with reconfigurable qualification"
    Gohar Varamini, Asgar Keshtkar, Mohammad Naser Moghadasi
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 24, pp.213-221, 2018
23. "A Narrow Frame antenna for WWAN/LTE/WiMAX/Wlan mobile phones"
    Zeinab Eskandari, Asgar Keshtkar, javad ahmadi shokoh
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 94, pp.244-252, 2018
24. "Study of Current Pulse Form for Optimization of Railguns Forces"
    Arash Rabiei, Asgar Keshtkar, Leila Gharib
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 46, pp.1047-1053, 2018
25. "Rotman lens design and optimization for 5G applications"
    Seyyedehelnaz Ershadi, Asgar Keshtkar, Ali Reza Bayat, ahmad hassaN ABDELRAHMAN, hao xin
    International Journal of Microwave and Wireless Technologies, Vol. 10, pp.1048-1057, 2018
26. "Wideband High Gain Antenna Subarray for 5G Applications"
    Seyyedehelnaz Ershadi, Asgar Keshtkar, ahmadhassan abdel rahman, hao xin
    Progress In Electromagnetics Research C, Vol. 78, pp.33-46, 2017
27. "A broadband ultrathin nonlinear switching metamaterial"
    Ehsan Zarnoosheh Farahani, Saughar Jarchi, Asgar Keshtkar
    Advanced Electromagnetics, Vol. 6, pp.64-70, 2017
28. "Electromagnetic Compatibility and Current Pulse of Railgun"
    Leila Gharib, Asgar Keshtkar, ayaz ghorbanei
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 45, pp.1453-1458, 2017
29. "Comparison of Inductance Gradient and Electromagnetic Force in Two Types of Railguns With Two Projectiles by Finite-Element Method"
    Asgar Keshtkar, Zahra Jafari khorami, Leila Gharib
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 45, pp.2387-2392, 2017
30. "A CPW-fed tapered slot antenna with improved time and frequency domain characteristics"
    Alireza Hokmabadi, Asgar Keshtkar, Ali Reza Bayat, ahmad keshtkar
    International Journal of Microwave and Wireless Technologies, Vol. 9, pp.515-521, 2016
31. "A Miniaturized CPW-Fed Tapered Slot Antenna in Lossy Environment for UWB Application in Breast Cancer Detection"
    Alireza Hokmabadi, Asgar Keshtkar, Ali Reza Bayat, ahmmad keshtkar
    International Journal of Electrical and Electronics Engineering, 2016
32. "Mathematical formulation for transparency and maximum scattering from bilayer MTM-coated PEC cylinders"
    Zahra Bahrami, Asgar Keshtkar,
    OPTICAL AND QUANTUM ELECTRONICS, Vol. 47, pp.2507-2524, 2015
33. "Design of 500 kJ Pulsed Power Supply System for Electromagnetic Rail Gun using PSPICE Simulation"
    R. Murugan, s. poorani, Asgar Keshtkar, Leila Gharib
    INDIAN JOURNAL OF SCIENCE AND TECHNOLOGY, Vol. 8, pp.1-7, 2015
34. "A NOVEL FRACTAL FOR IMPROVING EFFICIENCY AND ITS APPLICATION IN LTE MOBILE ANTENNAS"
    Zeinab Eskandari, Asgar Keshtkar, , Leila Ghanbari Yosef Abad
    MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Vol. 57, pp.2429-2434, 2015
35. "Design of compact patch antenna based on zeroth-order resonator forwireless and GSM applications with dual polarization"
    , Asgar Keshtkar, ,
    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, Vol. 69, pp.163-168, 2015
36. "Effect of Armature and Rails Resistivity Profile on Rail s Electromagnetic Force and Armature Velocity"
    Asgar Keshtkar, Arash Rabiei, Leila Gharib
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 43, pp.1541-1546, 2015
37. "Novel Study of Rail s Geometry in the Electromagnetic Launcher"
    , Asgar Keshtkar
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 43, pp.1652-1656, 2015
38. "Miniaturization of Antenna for Wireless Application with Difference Metamaterial Structures"
    , , , , Asgar Keshtkar
    Progress in Electromagnetics Research-PIER, Vol. 145, pp.19-30, 2014
39. "Study of the Current Distribution Magnetic Field and Inductance Gradient of Rectangular and Circular Railguns"
    Asgar Keshtkar,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 41, pp.1376-1381, 2013
40. "Analyzing the Near and Far Field Using Finite Difference and Finite Element Method"
    Asgar Keshtkar, ,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 41, pp.1398-1403, 2013
41. "Simulation of a Two-Turn Railgun and Comparison Between a Conventional Railgun and a Two-Turn Railgun by 3-D FEM"
    Asgar Keshtkar, , ,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 41, pp.1392-1398, 2013
42. "SAR Reduction of the Implanted Meandered Antenna with Two Novel Antennas"
    , Asgar Keshtkar, Ali Reza Bayat
    IACSIT International Journal of Engineering and Technology, Vol. 4, pp.508-512, 2012
43. "Inductance Gradient Variation with Time and Armature Sliding along the Rails"
    Asgar Keshtkar, ,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 39, pp.75-79, 2011
44. "Transition Study of Current Distribution and Maximum Current Density in Railgun by 3D-FEM- IEM"
    , Asgar Keshtkar,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 39, pp.13-17, 2011
45. "Thermal Computation in Railgun by Hybrid Time Domain Technique 3D-FEM-IEM"
    , Asgar Keshtkar,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 39, pp.18-21, 2011
46. "Probe pressure optimisation in bio-impedance spectroscopy"
    , Asgar Keshtkar
    International Journal of Medical Engineering and Informatics, Vol. 3, pp.78-84, 2011
47. "Numerical Study of Hydromagnetic Convection of an Electrically Conductive Fluid With Variable Properties Inside an Enclosure"
    , , Asgar Keshtkar
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 39, pp.516-520, 2011
48. "Effect of Rail Tapering on the Inductance Gradient Versus Armature Position by 3D-FEM"
    Asgar Keshtkar, ,
    IEEE TRANSACTIONS ON PLASMA SCIENCE, Vol. 39, pp.71-74, 2011
49. "Deravation of a Formola for Inductance Gradient Using Intelligent Estimation Method"
    Asgar Keshtkar, ,
    IEEE TRANSACTIONS ON MAGNETICS, Vol. 45, pp.305-310, 2009
50. "Determination of Optimum Rails Dimensions In Railgun by Lagrange s Equations"
    Asgar Keshtkar, , ,
    IEEE TRANSACTIONS ON MAGNETICS, Vol. 45, pp.594-598, 2009
51. "A new broadband triangular micro strip antenna using slots and integrated reactive loading optimized by genetic algorithm and method of moment(GA/MOM)"
    Asgar Keshtkar, , ,
    International Journal of Advance in Communication Engineering, Vol. 1, pp.87-92, 2009
52. "Derivation of a Formula for Inductance Gradient Using Intelligent Estimation Method"
    Asgar Keshtkar, sajjad bayati, ahmad keshtkar
    IEEE TRANSACTIONS ON MAGNETICS, Vol. 45, pp.305-308, 2009
53. "Numerical Examination of a New Ultra Wideband Dual-Polarized Square Horn Antenna for Pulse Radiation and the Early-Stage Breast Cancer Detection"
    , Asgar Keshtkar,
    International Journal of Medical Engineering and Informatics, Vol. 1, pp.381-398, 2009
54. "The effect of applied pressure on the electrical impedance of the bladder tissue using small and large probes"
    , Asgar Keshtkar
    JOURNAL OF MEDICAL ENGINEERING and TECHNOLOGY, Vol. 32, pp.505-511, 2008
55. "Modeled Current Distribution Inside the Normal and Malignant Human Urothelium Using Finite Element Analysis"
    ahmad keshtkar, Asgar Keshtkar
    IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, Vol. 55, pp.733-739, 2008
56. "Surface fluids effects on the bladder tissue characterisation using electrical impedance spectroscopy"
    , , , Asgar Keshtkar
    MEDICAL ENGINEERING and PHYSICS, Vol. 30, pp.693-699, 2008
57. "آنتن مجتمع فراپهن باند و باند باریک برای کاربردهای رادیوشناختی و تنظیم پذیری با استفاده از طراحی مدارهای تطبیق امپدانس"
    مهدی ابیاوغلی، محمد ناصر مقدسی، اصغر کشت کار، بهبد قلمکاری
    مهندسی برق دانشگاه تبریز، نسخه 50، صفحات:1455-1461، 1399
58. "بهبود جذب در نانو پوسته های فلزی کروی با استفاده از زیرلایه گرافنی"
    حمیده نوری مهتاج، ساغر جارچی، اصغر کشت کار
    نانو مقیاس، صفحات:319-327، 1397
59. "افزایش گرادیان اندوکتانس ریلگان با استفاده از مواد فرومغناطیس"
    اصغر کشت کار، علی کلانترنیا
    مجله دانشکده فنی دانشگاه تبریز، نسخه 35، صفحات:47-53، 1386

مقالات علمی ارائه شده در همایش‌ها

1. "Absorption enhancement of spherical nano-shells using graphene substrate for solar cell applications"
   Hamideh Noori mahtaj, Saughar Jarchi, Asgar Keshtkar
   Annual International Meeting on Low Dimensional Systems RIAPA-LDS2017, 2017
2. "Planar Low VSWR Monopole Antenna for UWB and LTE Communications"
   Leila Ghanbari, Asgar Keshtkar, Sakine Ghanbari, Saughar Jarchi
   Microwave Symposium (MMS) 2016 16th Mediterranean, pp.1-4, 2016
3. "Simulation and inspection of some round ended Ag (silver) nano structures effects on extinction cross section"
   Hamideh Noori mahtaj, Saughar Jarchi, Asgar Keshtkar
   Annual International Advanced Schoo lon Low Dimensional Systems (RIAPA-LDS2016), 2016
4. "Ultrathin planar nonlinear switching metamaterial"
   Ehsan Zarnoosheh Farahani, Saughar Jarchi, Asgar Keshtkar
   ICE2015, No 1 , 2015
5. "Current Distribution Magnetic Field and Inductance Gradient at the Circular Railgun"
   Asgar Keshtkar
   16th International Symposium on Electromagnetic Launch Technology, 2012
6. "Numerical Analyzing the Electromagnetic Launcher"
   Asgar Keshtkar
   2012 16th International Symposium on Electromagnetic Launch Technology (EML), pp.1-5, 2012
7. "Analysing the Electromagnetic Launcher with Combination Both FEM-3D and IEM Methods in Time Domain"
   Asgar Keshtkar,
   16th International Symposium on Electromagnetic Launch Technology, pp.131-132, 2012
8. "Analysing the Far Field in Railgun Using Finite Difference Method"
   Asgar Keshtkar,
   16th International Symposium on Electromagnetic Launch Technology, 2012
9. "Analysing the Near and Far Field Using Finite Element Method"
   Asgar Keshtkar,
   16th International Symposium on Electromagnetic Launch Technology, 2012
10. "Comparsion between conventional railgun and two-turn railgun by FEM"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology, 2012
11. "Analyzing the Current Distribution and Inductance Gradient at the Circular Rail and Rectangular Rail"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology (EML), pp.1-5, 2012
12. "Simulation of Launching Several Projectile by a Multi-Turn"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology (EML), pp.1-5, 2012
13. "Analyzing the Electromagnetic Launcher with Combination Both FEM-3D and IEM"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology (EML)16th International Symposium, pp.1-7, 2012
14. "Analyzing the Near and Far Field Using FEM"
    Asgar Keshtkar,
    2012 16th International Symposium on Electromagnetic Launch Technology (EML), pp.1-5, 2012
15. "Analzing the Far Field in Railgun using FDM"
    Asgar Keshtkar,
    2012 16th International Symposium on Electromagnetic Launch Technology (EML), 2012
16. "Magnetic Field and Inductance Gradient at the Circular Railgun"
    Asgar Keshtkar,
    2012 16th International Symposium on Electromagnetic Launch Technology (EML), 2012
17. "Comparison between conventional railgun andTwo-Turn railgun by 3D- FEM"
    Asgar Keshtkar,
    2012 16th International Symposium on Electromagnetic Launch Technology (EML), pp.1-5, 2012
18. "Analysing the Current Distribution Magnetic Field and Inductance Gradient at the Circular Rail in Comparision to Rectangular Rail"
    Asgar Keshtkar
    16th International Symposium on Electromagnetic Launch Technology, pp.76-77, 2012
19. "Simulation of Launching Several Projectile by a Multi-Turn Railgun by 3D-FEM"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology, 2012
20. "Numerical Analysing the Electromagnetic Launcher Using FEM-3D in Time Domain"
    Asgar Keshtkar,
    16th International Symposium on Electromagnetic Launch Technology, pp.26-27, 2012
21. "Investigation of Shielding Effectiveness Caused by Incident Plane Wave on Conductive Enclosure in UHF Band"
    Asgar Keshtkar, amir maghoul, ali kalantarnia,
    2010 International Conference on Mechanical and Aerospace Engineering (ICMAE 2010), pp.485-491, 2010
22. "A new broadband triangular micro strip antenna using slots and integrated reactive loading optimized by genetic algorithm and method of moment(GA/MOM)"
    Asgar Keshtkar,
    Progress in Electromagnetic research symposium, pp.114-114, 2009
23. "Geometrical Effect of Aperture on Shielding Effectiveness for Conductive Enclosures"
    Asgar Keshtkar,
    Progress in Electromagnetic research symposium, pp.353-353, 2009
24. "Simulation and Derivation of Typical Photonic Band gap Structure s Design Parameters Using Curve Fitting Method"
    Asgar Keshtkar,
    4th International Symposium on Telecommunication (IST 2008), pp.144-150, 2008
25. "Numerical Study of Magneto-Convection of an Electrically Fluid with Variable Properties"
    Asgar Keshtkar
    International Conference on Numerical Analysis and Applied Mathematics AIP, pp.739-742, 2008
26. "Optimal Dimensional Determination of the Rail using Lagrangian Equations"
    Asgar Keshtkar,
    14th International Symposium on Electromagnetic Launch Technology, pp.559-563, 2008
27. "The Effect of Sheild Orifice on the Electromagnetic Interface Factor in HPM"
    Asgar Keshtkar,
    14th International Symposium on Electromagnetic Launch Technology, pp.397-403, 2008
28. "Deravation of a Formola for Inductance Gradient Using Intelligent Estimation Method"
    Asgar Keshtkar
    14th International Symposium on Electromagnetic Launch Technology, pp.94-98, 2008
29. "Improvement of Inductance Gradient in Railgun Using Ferromagnetic Materials"
    Asgar Keshtkar,
    14th International Symposium on Electromagnetic Launch Technology, pp.206-212, 2008
30. "Numerical Investigation of a New Ultra Wideband Dual-Polarized Square Horn Antenna for Pulse Radiation and the Early-Stage Breast Cancer Detection"
    Asgar Keshtkar,
    The 8th Iranian Congress of Medical Physics, 2008
31. "طراحی و شبیه سازی جاذب متامتریال دو بانده و تنظیم پذیری با استفاده از دیود ورکتور"
    عاطفه ترابی، ساغر جارچی، اصغر کشت کار
    پنجمین کنفرانس بین المللی مهندسی برق و کامپیوتر با تاکید بر دانش بومی-کد اختصاصی همایش: 70805-96170، 1396
32. "طراحی و بهینه سازی آنتن UWB تک قطبی صفحه ای CPW با تابع هزینه مناسب"
    علیرضا حکم آبادی، اصغر کشت کار، علیرضا بیات
    هشتمین کنفرانس مهندسی حمل و نقل و ترافیک، شماره 22 ، صفحات:1-6، 1387