Abstract: A multi band antenna system for transmission and reception of electromagnetic signals in a low-profile dual reflector configuration with position-controlled main-reflector, and fixed sub-reflector and feed horn. An added linear slide of the main-reflector with respect to the sub-reflector synchronized with variable tilt angle of the main-reflector for compensation for the varied focal length in the main-reflector to the beam due the varied main-reflector tilt. The system achieves a beam elevation of 10° to 100° (full elevation), minimum gain variations over the full elevation travel, swept volume as per ARINC 791 (e.g. Boeing Radome or Airbus Radome), and can be used to meet wide-Tx/Rx bands requirements.

Abstract: The invention describes a two-stage optical amplifier adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifier in a way suitable for forming unidirectional and bi-directional configurations useful in optical networks. One of them is a so-called east-west configuration for a bi-directional transmission, where each direction of the optical transmission is served by the two-stage optical amplifier the 1st stage of which belongs to one integrated assembly, and the 2nd stage—to another assembly.

Abstract: The invention describes a two-stage optical amplifier adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifier in a way suitable for forming unidirectional and bi-directional configurations useful in optical networks. One of them is a so-called east-west configuration for a bi-directional transmission, where each direction of the optical transmission is served by the two-stage optical amplifier the 1st stage of which belongs to one integrated assembly, and the 2nd stage—to another assembly.