| 摘要 |
<p>A resonant helical antenna including at least one helix consisting of at least two radiating wires (111 to 114) printed on a substrate, a miniaturised broadband radiating wire power supply structure printed on said substrate, and at least one hybrid coupler made of semi-localised elements, in order to reduce the size thereof, is disclosed. In the case of a quadrifilar helix consisting of four radiating wires, the power supply structure includes three hybrid couplers, e.g. a first 180° hybrid coupler (12) connecting a power input and/or output (17) of said antenna to two intermediate outputs and/or inputs (18, 19) phase-shifted through 180°, and two 90° hybrid couplers (13, 14) each connecting one of said intermediate outputs and/or inputs of said first hybrid coupler to one end of two of said radiating wires. The corresponding manufacturing methods are also disclosed.</p> |
