Microstrip antenna having a metal frame for control of an antenna lobe
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
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Citations
24 Claims
- 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.
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20. An array 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 array antenna, which array antenna comprises a ground plane and at least two microstrip antenna elements, where the ground plane comprises a first side and a second side, the microstrip antenna elements are mounted at a predefined distance from the first side of the ground plane and are ±
- 45°
dual-polarized aperture-coupled patches which are fed by a microstrip distribution network 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 each microstrip antenna element on the first side of the ground plane, in order thus to control the size and direction of the antenna lobe by means of the shape and positioning of the metal frame on the first side of the ground plane, where the metal frame comprises a first and a second side with the second side of the metal frame facing the projection of the respective microstrip 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, and where a first angle is formed at the edge between the first side of the metal frame and the normal of the first side of the ground plane through the edge and where a second angle is formed at the edge between the second side of the metal frame and the normal of the first side of the ground plane through the edge. - View Dependent Claims (21, 22, 23, 24)
- 45°
Specification