Patent ID: 6523248
Filing Date: 2003-02-25
Classification: H01P,Y10T

Abstract:
Method of producing a filter for electromagnetic microwave signals which, when the electromagnetic microwave signals are propagated in the filter, have an E-field, an H-field and a direction of propagation, the method comprising:making at least one through-cutout in a first electrically conductive plate which has a first and a second main plane of extent, and wherein the first electrically conductive plate is shaped as a rectangle and has a short side and a long side each extending in a plane of the first electrically conductive plate, inserting the first electrically conductive plate between a second electrically conductive plate and a third electrically conductive plate, which second and third electrically conductive plates each have a first and a second main plane of extent, so that the first electrically conductive plate is parallel to the second and the third electrically conductive plates, making electrically conductive connections between said first, second and third electrically conductive plates, which connections interconnect edge surfaces of the first, second and third electrically conductive 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, which, in the direction of propagation of the signals, is enclosed by electrically conductive surfaces, and orienting the first electrically conductive plate so that the extent of the short side of the first electrically conductive plate coincides with the E-field of the electromagnetic microwave signals when the electromagnetic microwave signals are propagated in the filter, and the extent of the long side of the first electrically conductive plate coincides with the direction of propagation of the electromagnetic microwave signals.