| A Wideband Wide Scanning Circularly Polarized Antenna forPhased Array Systems |
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| Abstract:Aiming at the current problems of insufficient bandwidth and scanning angles of circularly polarized phased
array antennas, a circularly polarized quadrature four-leaf clover antenna is designed, and the application of the antenna in
the phased array system is experimentally studied. The antenna pattern is coated on the front and back sides of the PCB, the
coaxial cable is used for feeding, and the structure is simple and easy to implement, in the array, the wide-angle scanning
and broadband axial ratio characteristics are realized through the isolation column between the cells. The simulation design
results of the circular polarization antenna, the actual measurement results of the antenna array and application examples are
given in the article. The mutual verification between antenna simulation and actual measurement results shows that the circularly
polarized antenna has good VSWR in all scanning region,the impedance bandwidth and axial ratio bandwidth both are
more than 35%,besides, the antenna has the advantages of simple structure and light weight, and is suitable for use in modularized
phased array radar systems. |
| keywords:circularly polarized antenna, broadband axial ratio, phased array |
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