Patch array antenna with cavity‐backed SIW feed for X‐band applications

Abstract

In this article, a new arrangement of patch array antenna incorporated with cavity back substrate integrated waveguide (SIW) and stacked structure is which operating at X‐band, is presented. The proposed structure enhances the gain and bandwidth of the array antenna markedly. The prototype antenna contains a 2 × 2 patch array formation with compact feed network that helps to miniaturize the structure and improve radiation properties in antenna. The inner metallic posts inside of the antenna limit the propagation of the lower mode and therefore TM220 mode is propagated as a dominant mode. For designing of the antenna, equivalent cavity model is used, but for the final full wave simulations, it is replaced with SIW configuration. The stack layer is added to the antenna to improve its bandwidth, efficiency, and gain. The proposed antenna is fabricated on RO4003 substrate with thickness of about 0.8 mm, and total dimensions of 38 × 38 mm2 and stacked layers are etched on RT‐Duroid 5880 substrate with thickness of 1.6 mm. An acceptable agreement is obtained between measured and simulated results. The proposed antenna has 2.7% bandwidth and at the center frequency (9.01 GHz) its gain is 10.8 dBi with 95% efficiency and 25.02 dB front to back ratio. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:319–323, 2016

Multi‐mode substrate integrated waveguide broadband circularly polarized antenna array based on metasurface

“…Its quasi‐closed planar waveguide structure determines the advantages of microstrip line and metal waveguide structures: printed circuit board (PCB) process manufacturing determines the low processing cost of substrate integrated waveguide. Easy of mass production, small size, low profile and easy integration, 5 similar to the traditional rectangular waveguide transmission characteristics, determine the advantages of SIW with low loss and low radiation interference. Meanwhile, the radiation performance of the antenna is enhanced because SIW effectively reduces the surface wave loss of the antenna and binds the energy in a specific region 6 .…”