期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 60, 期 1, 页码 20-29出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2011.2167910
关键词
Leaky wave; leaky-wave antenna; periodic structure; SIW; substrate integrated waveguide; surface wave
资金
- China Scholarship Council (CSC)
- Natural Science Foundation of China [61172026]
- Research Program of Guangzhou [2010Y1-C401]
- NSFC-Guangdong [U0935002]
A novel slotted substrate integrated waveguide (SIW) leaky-wave antenna is proposed. This antenna works in the TE10 mode of the SIW. Leakage is obtained by introducing a periodic set of transverse slots on the top of the SIW, which interrupt the current flow on the top wall. It is seen that three modes (a leaky mode, a proper waveguide mode, and a surface-wave-like mode) can all propagate on this structure. The wavenumbers of the modes are calculated theoretically and are numerically evaluated by HFSS simulation. The leakage loss, dielectric loss, and conductor loss are also analyzed. A uniform slotted SIW leaky-wave antenna is designed that has good beam scanning from near broadside (though not exactly at broadside) to forward endfire. This type of SIW leaky-wave antenna has a wide impedance bandwidth and a narrow beam that scans with frequency. Measured results are consistent with the simulation and the theoretical analysis.
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