Waveguide antenna

A waveguide antenna comprising:

• a first layer having a power feeder provided in a horizontal direction and a horizontal divider connected to the power feeder and provided in the horizontal direction;
• and
• a second layer including a first divider power feeder connected to the first layer and connected to one side of the horizontal divider through a first through hole, a second divider power feeder connected to the other side of the horizontal divider through a second through hole, first and second radio wave radiating units connected to the first divider power feeder, and third and fourth radio wave radiating units connected to the second divider power feeder-, wherein
• the power feeder of the first layer includes a feeding line for feeding the horizontal divider and a ridge provided to protrude in a center along the feeding line;
• the ridge includes a thickness step part whose thickness decreases at an end in contact with the horizontal divider;
• the feeding line includes a width step part whose width increases at the end in contact with the horizontal divider;
• and
• the thickness step part is located inside the width step part.