A multiband microstrip antenna comprises a dielectric spacer, on one of opposite surfaces of which a grounded conductor is located, on the other surface two radiating elements: the first one in the form of a ring conductor, the second conductor inside the fist one with a gap near inside end. To extend a number of working bands, the first radiating element is made as a round ring conductor with average diameter equals to, where, a number of waves that lay along conducting ring,-wavelength in a transmission line cable. The second radiating element is made as a conductive disk and, in addition, comprises a conducting movable band, with help of which the conducting ring is united with the conductive disk.
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