CST – Computer Simulation Technology

Excitation Control Method for a Low Sidelobe SIW Series Slot Array Antenna With 45 Linear Polarization
Dong-yeon Kim, Sangwook Nam
IEEE Transactions on Antennas and Propagation
Volume: 61, Issue: 11, November 2013
5807 - 5812
45 degree linear polarization, millimeter wave antenna, sidelobe suppression, slot array antenna, substrate integrated waveguide
A sidelobe suppression method for a series slot array antenna which radiates 45 -inclined linear polarization is proposed. Axial displacements are employed to create arbitrary excitation coefficients for individual centered-inclined radiating slots along the center line of a broad wall. To verify the proposed designmethod, we design two types of center-fed linear slot array antennas with a Dolph-Chebyshev distribution for –20 dB and –26 dB sidelobe levels (SLLs) in the Ka band. Furthermore, a cross-validation process involving an equivalent circuitmodel analysis and electromagnetic full-wave simulation using CSTMWS is utilized. The entire structure of the proposed series slot array antenna is fabricated on printed circuit boards (PCBs), including drilling and chemical etching, to secure advantages of miniaturization and cost reduction. The measured realized gains are 15.17 and 15.95 dBi and SLLs are –18.7 and –22.5 dB respectively for two types of fabricated antennas. It demonstrates the validity of the proposed sidelobe suppression method.

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