WAVEGUIDE SLOT ARRAY ANTENNA

PROBLEM TO BE SOLVED: To provide a waveguide slot array antenna capable of acquiring frequency bands of about 4 times compared with a conventional antenna, if they are in a same size. SOLUTION: A square shape opening surface is divided into four squares. Each of divided sections is provided with serial feed branched waveguides 6, 7, 8, 9 and a radiation waveguide 10 extended upward and downward from them. As for power feeding to each of the serial feed branched waveguides 6, 7, 8, 9, a H-shaped feed lines (a first feed line 3, a second feed line 4, and a third feed line 5) laid in an H-shaped fashion so as to place an E plane in a direction same as the opening surface are provided at the center part of the opening surface. Electric power is supplied from the rear of an antenna to a wide wall surface at a center section of the first feed line 3. Both ends of the second feed line 4 and the third feed line 5 are coupled to a wide wall surface of the serial feed branched waveguide at each divided section. COPYRIGHT: (C)2007,JPO&INPIT