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Microstrip patch antenna cst5/26/2023 Fig 1: An antenna functions as an energy transducer, dispersing EM energy into space or capturing it from space. A receiving antenna performs the complementary operation, capturing this EM energy in free space and confining it to a well-defined path (again, a wire or waveguide, as examples), then sending it to an RF front end. A transmitting antenna takes electrical and electronic power (and energy) originating at an amplifier and which is in a confined space such as a wire or a waveguide and disperses (radiates) it as electromagnetic (EM) power into free space. An antenna is an energy transducer (Figure 1). Q: What are the functions and objectives of any antenna?Ī. This FAQ looks at antennas in brief and at a specific antenna embodiment: the microstrip (patch) antenna. Depending on the application, the same antenna may be used for both roles, or radically different ones may be employed. The passive antenna is a critical part of any wireless communications link, for both transmit and receive sides. The microstrip antenna is a convenient, planar, easy-to-fabricate antenna with some attractive attributes and features, as well as some distinct limitations.
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