Antenna array

Details Antenna array Antenna array

2006-07-11

2006-07-11

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C343S795000, C343S821000, C343S853000

Reexamination Certificate

active

07075497

ABSTRACT:
An antenna (10) having a plurality of unitary dipole antennas (12) formed by folding a stamped piece of sheet metal. Each of the unitary dipole antennas (12) are fed by two stripline feed systems (20, 22). Each of these feed systems are separated above and extend over a groundplane (14) and are separated by an air dielectric to minimize intermodulation (IM). Phase shifters (40, 42, 44) in combination with a downtilt control lever (52) are slidably adjusted beneath the respective dividing portions of the stripline feed system to adjust signal phase and achieve a uniform beam tilt having uniform and balanced side lobes. These stripline feed systems can also be formed from stamped sheet metal and which have distal ends bent 90° upward to couple to the respective dipole antennas (12).

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