Title :
Reflection and ghosts in a multitower environment
Author :
Vaughan, T. ; McClure, H.
Author_Institution :
Micro Commun. Inc., Manchester, NH, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
The magnitude of reflections in a multitower TV environment and their delay in microseconds are calculated. The objectives of the study were to determine: (1) the principal source of ghosting on Mt. Wilson Calif.; (2) how the reflection can be reduced: (3) what the optimum antenna/tower characteristics are for a novel installation; (4) the effect of polarization on ghosts; and (5) the impact of HDTV (high-definition television) on the antenna/tower system test methods and test program are presented as well as a detailed analysis of the test result. Over 500 measurements were made at forty different locations. Some conclusions and recommendations for new installations are provided.<>
Keywords :
electromagnetic wave polarisation; electromagnetic wave reflection; poles and towers; radiowave propagation; television antennas; television interference; television receivers; television transmitters; HDTV; Mt. Wilson; delay; ghosts; high-definition television; measurements; microseconds; multitower TV environment; polarization; reflections; test methods; test program; Cities and towns; Delay; Directive antennas; HDTV; Monitoring; Optical reflection; Poles and towers; Space technology; TV; Testing;
Journal_Title :
Broadcasting, IEEE Transactions on
