Patent ID: 6535173
Filing Date: 2003-03-18
Classification: H01Q

Abstract:
A slot array antenna comprising:a first plate of electro-conductive material having a first and a second primary surface; a second plate of electro-conductive material having a third and a fourth primary surface; a third plate of electro-conductive material having a fifth and a sixth primary surface; said first plate including: a first feed port open to the first primary surface and formed substantially perpendicularly to the first primary surface for receiving an electromagnetic wave; and a feed waveguide formed in the second primary surface and communicating with said first feed port substantially at a center of a length of said feed waveguide for distributing the electromagnetic wave conducted from said first feed port; said second plate including: an array of second feed ports open to the third primary surface and formed substantially perpendicularly to the third primary surface, each of said second feed ports receiving a particular electromagnetic wave distributed by said feed waveguide; and an array of radiating waveguides formed in the fourth primary surface, each of said radiating waveguides being formed in a direction substantially perpendicularly to said array of second feed ports to communicate with associated one of said second feed ports and feeding the particular electromagnetic wave provided from said one second feed port; said third plate having arrays of slots formed from the fifth and sixth primary surfaces, each of said arrays being disposed over a length of associated one of said radiating waveguides; said first, second and third plates being accumulated with the second and third primary surfaces, and the fourth and fifth primary surfaces connected respectively.