例句與造句

1. The vertical radiation pattern is fan-shaped, reaching approximately 70?of elevation above the horizontal plane.
2. When so sectionalized the sections are themselves phased so as to provide the optimum vertical radiation pattern ( suppressing high-angle radiation ).
3. Masts longer than five eighths of the wavelength are normally not used, because they show bad vertical radiation patterns, so masts for mediumwave transmitters do not normally exceed 300 metres.
4. An anti-fading antenna ( informally and often incorrectly termed a " Franklin " antenna ) is a long-and medium-wave transmission antenna with a flat vertical radiation pattern.
5. As this antenna had an unfavourable vertical radiation pattern, which produced much skywave resulting in a too small fading-free reception area at night, in 1934 a new antenna was installed.
6. It's difficult to find vertical radiation pattern in a sentence. 用vertical radiation pattern造句挺難的
7. The radiation pattern referred to above is usually the horizontal radiation pattern, which is plotted as a function of azimuth about the antenna, although the vertical radiation pattern may also have a main lobe.
8. Use is not normally made of masts higher than five-eighths ( 5 / 8 ) of a wavelength, because such masts ( except for some special constructions for high power mediumwave broadcasting ) exhibit poor vertical radiation patterns.
9. The slot antenna was invented in 1938 by Alan Blumlein, while working for EMI . He invented it in order to produce a practical type of antenna for VHF television broadcasting that would have horizontal polarization, an omnidirectional horizontal radiation pattern and a narrow vertical radiation pattern.
10. The station came into service on 16 February 1941 and during May of that year a number of tests were carried out using a captive balloon to measure the performance of the horizontal dipole arrays and to determine the effect of the contour of the ground close to the station on their vertical radiation pattern.