Title :
Autopsy of unmanned airship television broadcast
Author :
Gray, D. ; Nagatsuka, M. ; Miura, R.
Author_Institution :
Yokosuka Radio Commun. Res. Centre, NICT, Yokosuka
Abstract :
A number of telecommunications experiments were flown on an autonomous, 68 metre non-rigid airship in November 2004 as part of a national R&D project for stratospheric platform systems. Although the digital television broadcast experiment was successful, it was found that the signal was occasionally entirely lost when the airship passed directly over one receiving station. A quarter wavelength monopole on a simple model of the airship gondola was studied using a commercially available MOM software. Conclusions were drawn about the effects of various gondola features upon the radiation pattern of the monopole, and recommendations are made for future gondola design
Keywords :
aircraft; antenna radiation patterns; high altitude stratospheric platforms; method of moments; monopole antennas; television broadcasting; MOM software; airship gondola; gondola design; national R&D project; nonrigid airship; quarter wavelength monopole; radiation pattern; receiving station; stratospheric platform systems; telecommunications experiments; unmanned airship television broadcast; Antenna radiation patterns; Autopsy; Bars; Digital TV; Helical antennas; Message-oriented middleware; Polarization; Radio broadcasting; TV broadcasting; Transmitting antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1711072
