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S-band Patch Antenna Design for CINEMA

S-band Patch Antenna Design for CINEMA. Chungju Kim kimcj@khu.ac.kr. Design Goal. S-Band Patch Antenna. Antenna Polarization(1). What is the Antenna Polarization

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S-band Patch Antenna Design for CINEMA

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  1. S-band Patch Antenna Design for CINEMA Chungju Kim kimcj@khu.ac.kr

  2. Design Goal • S-Band Patch Antenna

  3. Antenna Polarization(1) • What is the Antenna Polarization • The polarization of an antenna is the direction of the electric field (E-plane) of the radio wave with respect to the Earth's surface and is determined by the physical structure of the antenna and by its direction. Vertical Polarization LH Circular Polarization Horizontal Polarization RH Circular Polarization

  4. Antenna Polarization(2) • Why use the CP antenna for CINEMA? • Space communication has forced the use of Circular polarization. The fundamental advantage of circular polarization is that all reflections change the direction of polarization, precluding the usual addition or subtraction of main and reflected signals. Therefore there is far less fading and flutter when circular polarization is used at each end of the link.

  5. Antenna Polarization(3)

  6. Rectangular Patch antenna(1) • Geometry

  7. Rectangular Patch antenna(2) • S-parameter - Bandwidth(-10 dB)

  8. Rectangular Patch antenna(3) • Axial Ratio(Meas.) <xz-plane> <yz-plane> - Axial Ratio below the 3 dB

  9. Rectangular Patch antenna(4) • Radiation Pattern(Meas.) <xz-plane> <yz-plane> - Max. CP Gain at 2.160 GHz - Max. CP Gain at 2.160 GHz

  10. Double layer Patch antenna(1) • Geometry <First Layer> <Second Layer>

  11. Double layer Patch antenna(2) • S-parameter - Bandwidth(-10 dB)

  12. Double layer Patch antenna(3) • Axial Ratio(Meas.) <xz-plane> <yz-plane> - Axial Ratio below the 3 dB

  13. Double layer Patch antenna(4) • Radiation Pattern(Meas.) <xz-plane> <yz-plane> - Max. CP Gain at 2.205 GHz - Max. CP Gain at 2.205 GHz

  14. Double-fed Patch antenna(1) • Geometry <First Layer> <Second Layer>

  15. Double-fed Patch antenna(2) • S-parameter(EM Simulation) - Bandwidth(-10 dB)

  16. Double-fed Patch antenna(3) • Radiation Pattern(EM Simulation) <xz-plane> <yz-plane> - Max. CP Gain at 2.2 GHz - Max. CP Gain at 2.2 GHz

  17. SUMMARY

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