Sine-Wall Space-Tapered Linear Slot Array Antenna With Low Sidelobe and Second-Order Lobe Levels

A new sine-wall slot array antenna is proposed by using the space-tapered technique to decrease both sidelobe level (SLL) and second-order lobe level (SOLL), simultaneously. In the proposed method, the genetic optimization algorithm is utilized to implement the space-tapered technique and achieve th...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2018-02, Vol.66 (2), p.1020-1024
Main Authors: Pesarakloo, Ali, Sedighy, Seyed Hassan, Hodjatkashani, Farrokh
Format: Article
Language:English
Subjects:
Antenna arrays
Arrayed waveguide gratings
Gain
Microstrip antenna arrays
Optimization
Second-order lobe level (SOLL)
sidelobe level (SLL)
Slot antennas
slot array antenna
space-tapered arrays
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Summary:A new sine-wall slot array antenna is proposed by using the space-tapered technique to decrease both sidelobe level (SLL) and second-order lobe level (SOLL), simultaneously. In the proposed method, the genetic optimization algorithm is utilized to implement the space-tapered technique and achieve the slots center positions. Then, the waveguide side walls are rippled by sine-form segments to achieve uniform slots excitation needed in the space-tapered technique. Finally, a seven-slot array is designed and fabricated at 9.375 GHz to demonstrate the proposed idea. The proposed slot array achieves 14 dB gain and about 7.5 dB lower SLL as well as 7 dB lower SOLL and compared with the well-known Elliott's design procedure.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2017.2786310