| 摘要 |
PCT No. PCT/IL96/00037 Sec. 371 Date Jun. 11, 1999 Sec. 102(e) Date Jun. 11, 1999 PCT Filed Jul. 4, 1996 PCT Pub. No. WO98/01921 PCT Pub. Date Jan. 15, 1998A dual-frequency array antenna having an essentially planar structure with electronic beam steering capability in both a low and high frequency band independently of each other, constructed, in a layered formation, from a top planar array antenna unit operating in the low frequency band and a bottom planar array antenna unit operating in the high frequency band. The top planar array antenna is transparent to frequencies in the high frequency band.
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