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Figure 1

From: Multiplexed Cassegrain Reflector Antenna for Simultaneous Generation of Three Orbital Angular Momentum (OAM) Modes

Figure 1

(a) Hierarchical diagram of multiplexed Cassegrain reflector antenna composed of parabolic main reflector, Cassegrain subreflector, 2 × 2 OERW matrix feed with substrate and rectangular patches, and OAM mode mux (OMM). (b) Image of the proposed antenna. (c) Image of the OMM composed of quadrature hybrids, crossovers, and phase shifters using microstrip lines. The inputs of the OMM are used for OAM mode selection (l = 0, ±1), and the outputs are directly connected to the 2 × 2 OERW feed.

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