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Millimeter-Wave Waveguide Slot-Array Antenna Covered by a Dielectric Slab and Arrayed Patches

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2 Author(s)
Ji-Hwan Hwang ; Dept. of Electron. Inf. & Commun. Eng., Hongik Univ., Seoul, South Korea ; Yisok Oh

A high-performance waveguide, 16 times 16 slot array antenna with a cover structure at 38 GHz is presented. The protective cover structure, which consists of a dielectric slab and arrayed conductor patches, offers an advantage for designing a highly directive array antenna because it lowers the resonant conductance of the slot set such that a large number of slots can be arrayed. The widths of the slots in this antenna are fixed to 1 mm for easy production with a common computer-controlled milling machine. Moreover, the manufacturing process for this antenna is simplified by positioning the waveguide corrugations and slots together on a plate, which eliminates a welding process. Measurements show an antenna gain of 30.8 dBi, a depolarization level below -30 dB, and an efficiency level of 71% at the frequency band of 37.638.6 GHz.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:8 )

Date of Publication:

2009

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