Integrated circular polarized microstrip antenna with dual‐mode‐polarization insensitive characteristics

Circularly‐polarized cavity‐backed slot antenna array with simplified feeding structure

“…The proposed slot antenna array (up to 8 Â 8 elements) owns a simple antenna structure without using any power dividers and phase shifters/ polarizers. These merits are obtained along with a narrow bandwidth, which is due to that: (1) The degenerate cavity modes [11][12][13][14][15][16][17][18][19][20] are used to achieve CP radiation (Main factor);…”

“…[8][9][10] Besides, full-metal slot antennas are highly demanded in high-power communication systems for their high power-handling capacity.Circularly polarized antennas are widely used in satellite and radar communication systems to reduce polarization mismatch and multi-path interference. The degenerate modes is a widely-used method to design CP antennas, [11][12][13][14][15][16][17][18][19][20] including CP patch antennas, [11][12][13][14] CP SIW slot antennas, 15-19 and metal cavity slot antenna. 20 This…”

A circularly polarized microstrip patch antenna with enhanced bandwidth based on substrate integrated waveguide techniques

“…To excite the MPA, various feed structures have been studied. Conventional methods, including probe and transmission line are widely used 6,7 . Additionally, to obtain CP radiation, the power dividing networks are added to numerous antenna designs.…”

“…Conventional methods, including probe and transmission line are widely used. 6,7 Additionally, to obtain CP radiation, the power dividing networks are added to numerous antenna designs. As a consequence of that, the performances of these antennas deteriorated on account of the spurious radiation and the inherent inductance the feed line and the probe brought.…”