Patent ID: 6710678
Filing Date: 2004-03-23
Classification: H01P

Abstract:
A waveguide type duplex filter having at least first and second waveguides which each comprise filtering means tuned to a given frequency, wherein the duplex filter comprises two mechanical halves with a conducting surface, wherein faces directed toward each other are formed with channels which, when the halves have been assembled, constitute said waveguides, wherein said filtering means are produced by means of a sheet having a conducting surface which is arranged between the two halves, said conducting surface being provided with openings which define and delimit resonators in the two waveguides,said sheet can at least be arranged in first and second positions, that, in the first position of the sheet, the resonators in the first waveguide are tuned to a first frequency, while the resonators in the second waveguide are tuned to a second frequency, and that, in the second position of the sheet, the resonators in the first waveguide are tuned to the second frequency, while the resonators in the second waveguide are tuned to the first frequency.