11. The main lobe of the pattern is flanked by two sidelobes, which appear curved due to the global map projection. 12. In parabolic antennas, virtually all the power radiated is concentrated in a narrow main lobe along the antenna's axis. 13. The DPSS ( discrete prolate spheroidal sequence ) or Slepian window is used to maximize the energy concentration in the main lobe . 14. The typical solution is to limit the main lobe of the antenna beam so that it does not point near the ground. 15. The penalty for doing this is, either, an increase in main lobe width, or an increase in bandwidth requirements. 16. Variable parameter " ? " determines the tradeoff between main lobe width and side lobe levels of the spectral leakage pattern. 17. If the window's main lobe is narrow, the composite frequency response remains close to that of the ideal IIR filter. 18. Time shift can be useful to position the main lobes of compressed pulses at a standard location, regardless of chirp pulse length. 19. An aircraft detecting P2 stronger than P1 ( therefore in the sidelobe and at the incorrect main lobe bearing ), does not reply. 20. Thus the main lobe points away from P towards a position P'( which for this particular speaker is lower than P ).
