The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2008
Filed:
Jul. 26, 2006
Mario Sorolla, Castello, ES;
Dietmar Schmitt, Wassenaar, NL;
Marco Guglielmi, Wassenaar, NL;
Javier Gil, Pamplona, ES;
Noelia Ortiz Perez DE Eulate, Alsasua, ES;
Mario Sorolla, Castello, ES;
Dietmar Schmitt, Wassenaar, NL;
Marco Guglielmi, Wassenaar, NL;
Javier Gil, Pamplona, ES;
Noelia Ortiz Perez De Eulate, Alsasua, ES;
Agence Spatiale Europeenne, Paris, FR;
Abstract
A microwave bandstop filter comprises a waveguide segment of cross-section that presents longitudinal variation of sinusoidal type modulated by an amplitude function that is continuous, the period of said longitudinal variation of sinusoidal type being the Bragg period for the fundamental guided mode at a center frequency of the band to be stopped. A filter assembly comprises a microwave lowpass filter presenting a cutoff frequency and at least one interfering passband at frequencies higher than said cutoff frequency, and at least one bandstop filter as defined above, connected to the output of said lowpass filter, in which the amplitude and the period of said longitudinal variation, and also the length over which it extends are such that they stop said interfering passband of said lowpass filter. An output multiplexer for a multichannel microwave transmitter includes such a filter assembly.