A Microstrip Patch Array Antenna with Metal Mesh Structure for Cross Polarization Suppression
Keywords:
Cross polarization, metal mesh, microstrip antenna, patch arrayAbstract
A 1×4 microstrip patch array antenna is presented for Ku-band radar systems. A metal mesh structure working as a polarizing filter (twist reflector) is employed to reduce the cross-polarization of the antenna. The metal mesh structure is simple and easy to be printed on a commercial substrate. The proposed antenna has been designed and analyzed by using commercially available software – Computer Simulation Technology Microwave Studio (CST MWS), which is based on the finitedifference- time-domain algorithm. A prototype antenna is built and tested. The return loss has been compared between measured and simulated data under the criterion of VSWR less than 2 throughout the designed 14.9 to 15.1 GHz frequency range. The cross-polarization levels in both E and H planes are better than -21 dB, with fair regular radiation patterns.
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References
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