Patent ID: 7859476
Filing Date: 2010-12-28
Classification: H01P,H01Q

Abstract:
1. A device for producing a microwave phase-shifting cell of a reflectarray antenna, comprising: a waveguide closed at one of its ends by a matching element and at its other end by a microwave substrate wafer; an electrical circuit having three parallel conducting strips printed on the microwave substrate wafer, in the region bounded by the walls of the waveguide; and a capacitive element connected to the electrical circuit; wherein the electrical circuit has first and second parallel external conducting strips, defining a central region of the substrate, and a third, intermediate conducting strip, located in the central region and parallel to the external conducting strips, the conducting strips being at earth potential at the working frequency in question; the capacitive element is an integrated capacitor, the capacitance of which varies continuously according to a control voltage applied to its terminals, the integrated capacitor being implanted on a support substrate placed above the central part of the central region and arranged so as to at least partly cover the conducting strips in order to form a static capacitor C one of the terminals of the integrated capacitor being connected to the control voltage via the first external conducting strip, and the other terminal being connected to earth via the intermediate conducting strip, the connection for the terminals of the integrated capacitor to the conducting strips being performed by means of connection elements dimensioned and arranged so as to form an inductor of given inductance at the working frequency in question; and the second external conducting strip being configured so as to form, with the intermediate conducting strip, a static capacitor C