| 摘要 |
PURPOSE:To make a planar antenna highly efficient even when it is flared by constituting a feeder circuit by using a tri-plate type line forming an air layer. CONSTITUTION:Projecting parts 17 and recessed parts 16 and 18 constituted of a dielectric substance or metal are respectively provided on both surfaces of a dielectric base plate 12 supporting the central conductor 15 of a tri-plate line and the outside conductor 11 and base conductor 13 of the tri-plate of the line in such a way that the parts 17, 16, and 18 do not overlap the central conductor 15 and the projecting parts 17 can be respectively engaged with the recessed parts 16 and 18. Thus a tri-plate line forming an air layer is realized and used for a feeder circuit. Since the feeder circuit is constituted by using the tri-plate type line forming an air layer, most of the inside of the line can be filled up with air and the dielectric loss can be reduced, and thus, the efficiency of this antenna can be improved even when the antenna is constituted in an array. |
