Using a generalised network representation of aperture problems in terms of the method of moments a theory of cavity backed slot array is developed. 4 element broadside slot array excited by rectangular cavity resonator was chosen as a numerical example and calculations for the antenna quality factor, power transmission coefficient and radiation patterns were made. A technique for reducing the dimensions of the cavity of a cavity-backed slot antenna (CBSA) is presented, which facilitates proper fabrication and integration of miniaturized slot antennas on multilayer substrates. This is accomplished by replacing the solid metal around the traditional slot antennas.
Abstract
This paper proposes a new wideband W-band substrate integrated waveguide (SIW) cavity-backed slot (CBS) antenna. The SIW cavity suppresses the backward radiation and ensures this antenna have a very low profile (only about 4% of the operating wavelength). Several techniques, such as slot resonator with semicircular end, quarter-wavelength microstrip resonator, are introduced to improve impedance matching. The studied results demonstrate that this antenna has wide operating bandwidth in 54.3–67 GHz (about 20.9% of the fractional bandwidth), unidirectional radiation pattern and good linear polarization characteristic. These properties are very suitable for RF front-end system-on-package (SoP) design in millimeter wave wireless communication systems.
This is a preview of subscription content, log in to check access.
Access options
Cavity Backed Slot
Buy single article
Cavity Backed Slot Antenna
34,95 €
Slot Antenna Theory
Price includes VAT for Germany