Axial focusing of signal from distant point radiator reflected twice in deep paraboloid
Abstract
Double reflection of a signal in a deep paraboloid is investigated for the general case in which the incident signal source is on the optical axis of the reflector at a finite distance so that the incident wave is spherical. It is found that even slight divergence of the incident radiation disturbs the structure of the exiting beam significantly; however, the axial focusing is retained and may even increase causing, inter alia, the occurrence of a second volumetric focus outside the paraboloid. The possibility of exploiting the corresponding effects is discussed. The problem is investigated in beam approximation; the diffraction effect is taken into account along the axis, where the beam approximation does not apply.
- Publication:
-
USSR Rept Electron Elec Eng JPRS UEE
- Pub Date:
- January 1985
- Bibcode:
- 1985RpEEE....Q...2F
- Keywords:
-
- Focusing;
- Parabolic Reflectors;
- Signal Reflection;
- Wave Reflection;
- Beams (Radiation);
- Spherical Waves;
- Wave Diffraction;
- Communications and Radar