Telefonaktiebolaget Lm Ericsson (Publ)

Sune Johansson

Bengt Inge Svensson

G&ouml;ran Snygg

The invention relates to a method for producing a microwave filter ( ), comprising making at least one through-cutout ( ) in a first electrically conductive plate ( ) shaped as a rectangle, with a short side and a long side, inserting the first plate ( ) between a second ( ) and a third ( ) electrically conductive plate ( ), the first plate being arranged parallel to the second and the third plate, making electrical connections ( ) between said three plates for interconnecting those edge surfaces on the plates which coincide with the direction of propagation of the electrical signals, as a result of which a space comprising one or more cavities is formed. The first plate ( ) is arranged so that the extent of its short side coincides with the E-field of the microwave signals when they propagate in the filter ( ), and the extent of its long side coincides with the direction of propagation of the electrical signals.

Method of producing a microwave filter

Arrangement for use in an antenna array for transmitting and receiving at at least one frequency in at least two polarizations

An antenna structure for the transmission and processing of electromagnetic microwave signals is manufactured by making holes in a number of electrically-conductive plates by a mechanical or chemical process in order to create cut-outs in the form of through holes with electrically-conductive edge surfaces. For each plate, the holes have a defined position and length from one side of each plate to its other side. The plates with the holes are stacked in a defined relative position, and the sides of the plates are fixed to each other at least around the edge surfaces formed. In this way, a number of holes are given electrically-conductively limited surfaces in the form of the edge surfaces and also the parts of the side surfaces of the surrounding plate facing the holes.

Growing community of inventors

Växjö, Sweden

Sune Johansson