초록 ▼

A device for and/or comprised in antennas, in particular microwave antennas such as microstrip antennas, for controlling the antenna lobe and completely or partially suppressing cross-coupling between the polarizations in dual-polarized antenna elements. A metal frame, the sides of which can be angl

A device for and/or comprised in antennas, in particular microwave antennas such as microstrip antennas, for controlling the antenna lobe and completely or partially suppressing cross-coupling between the polarizations in dual-polarized antenna elements. A metal frame, the sides of which can be angled for a desired lobe width, is positioned around each antenna element on top of the ground plane of the antenna. The shape and positioning of the metal frame around the antenna element also control the antenna lobe. In this way, the antenna lobe can be controlled in the desired manner irrespective of the size of the ground plane of the antenna, which depends, for example, on a desired microstrip distribution network for the antenna.

대표청구항 ▼

[ What is claimed is:] [1.] A microstrip antenna for receiving and transmitting electromagnetic signals mainly within the microwave frequency range with an antenna lobe in a direction relative to the normal of the microstrip antenna, which microstrip antenna comprises a ground plane and at least one

[ What is claimed is:] [1.] A microstrip antenna for receiving and transmitting electromagnetic signals mainly within the microwave frequency range with an antenna lobe in a direction relative to the normal of the microstrip antenna, which microstrip antenna comprises a ground plane and at least one antenna element, the ground plane comprising a first side and a second side, the antenna element being mounted at a predefined distance from the first side of the ground plane, and the antenna element being fed be feed means from the second side of the ground plane, wherein a metal frame is arranged directly on the ground plane, on the first side of the ground plane around a projection of the antenna element on the first side of the ground plane in order thus to control the size and direction of the antenna lobe with the shape and positioning of the metal frame on the first side of the ground plane, and the metal frame comprises a first and a second side where the second side of the metal frame faces the projection of the antenna element and where the first and second sides of the metal frame are electrically interconnected at least along one edge which forms a line along the metal frame.