Development of Low Profile Cavity Backed Crossed Slot Antennas for Planar Integration

• Published in: IEEE transactions on antennas and propagation Vol. 57; no. 10; pp. 2972 - 2979
• Main Authors: Luo, Guo Qing, Hu, Zhi Fang, Liang, Yaping, Yu, Li Yang, Sun, Ling Ling
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna design; Antenna measurements; Antennas; Applied sciences; Circuit boards; Circular polarization; Coplanar waveguides; Costs; dual frequency; Exact sciences and technology; Fabrication; Frequency; Gain measurement; grounded coplanar waveguide (GCPW); Holes; Linear polarization; low profile backed cavity; Optical polarization; Printed circuits; Radiocommunications; single feed; Slot antennas; substrate integrated waveguide (SIW); Telecommunications; Telecommunications and information theory; Tellurium; Weight reduction; Rectilinear polarization; Circular polarization; linear polarization; Cross polarization; Printed circuit board; Polarized wave; dual frequency; Crossed antenna; low profile backed cavity; Waveguide; grounded coplanar waveguide (GCPW); Antenna gain; Cavity; Slot antenna; substrate integrated waveguide (SIW); Coplanar waveguides; Multiple frequency; Cost lowering; single feed
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2009.2028602

Single fed low profile cavity backed crossed slot antennas for dual frequency dual linear polarization and circular polarization applications are first presented in this paper. By employing the substrate integrated waveguide (SIW) technique in the antenna designs, the low profile backed cavity structure can be realized by using only a single layer of low cost printed circuit board (PCB) substrate. A single grounded coplanar waveguide (GCPW) is employed as the feeding element to excite the TE 120 and TE 210 modes in the SIW cavity. A crossed slot structure is used as the radiating element in order to radiate the desired dual linearly or circularly polarized wave. From the measurement results, it is seen that these novel antennas retain the advantages of conventional metallic cavity backed antennas, including high gain, high front-to-back ratio (FTBR), and low cross polarization level (CPL). Furthermore, the proposed antennas also possess the advantages of low profile, light weight, low fabrication cost, and easy integration with planar circuits.