Patent ID: 6285334
Filing Date: 2001-09-04
Classification: H01Q

Abstract:
A slot antenna comprising:a waveguide having a first side, a second side, a third side, and a fourth side, a closed end and an open end, wherein the second side extends substantially perpendicularly from a first end of the first side and wherein the third side extends substantially perpendicularly from a second end of the first side and wherein the fourth side extends between the second side and the third side, the fourth side being substantially parallel to the first side, the sides and the closed end forming a cavity;a feeding point located substantially midway between the first end of the first side and the second end of the first side; anda T-Bar located inside the cavity, the T-bar having a center member extending from the feeding point into the cavity and a cross member having a length extending across the cavity between the second side and the third side wherein the cross member is shaped as a stepped cylinder having a first diameter in a central portion along the length of the cross member and having a second diameter in an outer portion along the length of the cross member.