| 摘要 |
<p>A planar, phased-array antenna (50) including a nonconductive substantially planar substrate and a transmission line (61) disposed on one surface is disclosed, a segment of the transmission line forming an arc of radius R centered on the antenna axis (51). A conductive layer on the other antenna surface includes two or more slotted openings (53, 55, 57, 59), each slotted opening having one end located within a distance R of the antenna axis, such that, when an electromagnetic signal is fed into one end of the transmission line, electromagnetic energy is sequentially coupled into the slotted openings, and a circularly-polarized signal is radiated from the antenna substantially in the direction of the antenna axis. An amplifier (71) or a connector may be electrically connected to one or both ends of the transmission line, or one end of the transmission line may be terminated in an impedance load (73) to form a leaky-wave antenna. The slotted openings may comprise either or both straight and curved segments, and may be of the same or unequal lengths. Curved slotted openings may be oriented clockwise or counter-clockwise to transmit or receive either left-handed or right-handed polarized signals.</p> |
