Echo analysis of side-mounted DTV broadcast antenna azimuth patterns

Author

Eilers, Carl G. ; Sgrignoli, Gary

Author_Institution

Zenith Electron. Corp., Glenview, IL, USA

Volume

45

Issue

1

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

3

Lastpage

10

Abstract

Azimuth pattern analysis of a side-mounted antenna is made keeping reflections separate from the main radiated signal. Each reflection is characterized by a reflection coefficient and path difference in wavelengths at a distant receiving summing point. At each azimuth, the reflections are expressed as echoes accompanying a modulated VSB data pulse. The corresponding receiver equalizer tap weights are determined from which the DTV receiver threshold impact is calculated. Measurements of a side-mounted antenna using an azimuth fly-around technique are compared to the calculated results for specific azimuth directions. It is concluded that the DTV performance degradation caused by close-in reflections from adjacent tower members may be predicted by calculation and that the degradation is small

Keywords

antenna radiation patterns; antenna testing; broadcast antennas; digital television; echo; electromagnetic wave reflection; electromagnetic wave scattering; equalisers; modulation; television antennas; DTV receiver threshold; adjacent tower members; azimuth fly-around technique; azimuth pattern analysis; close-in reflections; echo analysis; main radiated signal; measurements; modulated VSB data pulse; path difference; performance degradation; receiver equalizer tap weights; reflection coefficient; scattering analysis; side-mounted DTV broadcast antenna; wavelengths; Antenna measurements; Azimuth; Broadcasting; Degradation; Digital TV; Equalizers; Pattern analysis; Pulse modulation; Reflection; Reflector antennas;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.754982

Filename

754982