| 摘要 |
PROBLEM TO BE SOLVED: To obtain a flat element for a phased array antenna with a low profile employing a compact laminated disk radiator element. SOLUTION: The radiator tile is provided with a lower dielectric layer 20 having a ground plane 22 and via-transition section 24a, 24b, a coupling circuit layer 30 provided with 90-degree hybrid coupling circuits 30, 32 coupled with the via-transition section 24a, 24b, a balun layer 50 provided with an RF transition section 56 that is coupled with a plurality of RF transition sections 47 selectively connected between lower/upper ground plans 52, 54, a 180-degree hybrid coupling circuit 53 and the coupling circuits 50, 30, 32 and coupled with the 180-degree hybrid coupling circuit 53, and with a layered disk radiator having a plurality of ground via-holes 55, 34, 57, a dielectric pack 62 with an active radiator 64 on the upper face, an upper dielectric layer 60 adjacent to the active radiator 64, a parasitic radiator 66 placed adjacently to the upper dielectric layer 60, and having a couple of stimulation probes 63.
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