Abdallah, E. A. F., M.El-Said, E. A. Hashish, and E. E. K. El-Kinawy,
"Design of high directivity coupler using finite element method",
XXVI th General Assembly of the International Union of Radio science, Toronto, Canada, Abstract No.B1.p.02, 1999.
ABDALLAH, E. A. F., M. El–Said, A.A.Nazir, M. A. Nasef, and E. El–Kinawy,
"Design and Fabrication of a Novel Single Balanced Mixer Using Lange Coupler",
Journal of Engineering and Applied Sciences, vol. 39, issue 2, pp. 391-403 , 1992.
Abdallah, E. A. F., M.El-Said, E. A.Hashish, and D. A. Salem,
"Theoretical study of the resonant frequencies of triangular microstrip resonator",
National Radio Science Meeting, Boulder, Colorado, U.S.A, pp. 326, 2000.
Abdallah, E. A. F., M.El-Said, E. A.Hashish, and I. M.Barseen,
"Six – port reflecatometer using three coupled microstrip lines on multi – dielectric interfaces",
International union of Radio Science Symposium, lille, France, july 28- Sept.5,, 1996.