The three-polarized
slot antenna with coaxial feed capacitive loading of grid slot relates to a
slot antenna, which is composed of three mutually perpendicularly placed single-polarized antennas (11); each antenna (11) includes a
dielectric substrate ( 1),
metal ground (2) and
radiation slots (3), coaxial feeder (4) on the
dielectric substrate (1); there are
radiation slots (3) and multiple parallel grid slots on the
metal ground (2) (6); The two ends of the
radiation slot (3) are short-circuited; there are several capacitors (7) connected in parallel across the edge of the radiation slot (3); one end of the coaxial feeder (4) is the port (8) of the antenna , the inner conductor (9) at the other end of the coaxial feeder (4) crosses the radiation slot (3), and is connected to the
metal ground (2) at the edge (10) of the radiation slot (3). The antenna reduces antenna size,
cross polarization, shadowing and improves isolation.