directive gain造句

例句与造句

1. The theoretical gain ( directive gain ) of a dish increases as the frequency increases.
2. The word " directivity " is also sometimes used as a synonym for directive gain.
3. It is also possible to depict the directive gain of the antenna as a function of the direction.
4. The directive gain of an antenna can be computed from the published gain divided by the antenna's efficiency.
5. Directive gain or directivity is a different measure which does " not " take an antenna's electrical efficiency into account.
6. It's difficult to find directive gain in a sentence. 用directive gain造句挺难的
7. The directivity is therefore the maximum directive gain when taken over all directions, and is always " at least " 1.
8. Thus, if expressed as dimensionless ratios rather than in dB, the total directive gain is equal to the sum of the two partial directive gains.
9. Thus, if expressed as dimensionless ratios rather than in dB, the total directive gain is equal to the sum of the two partial directive gains.
10. "' Partial directivity "'is calculated in the same manner as the partial directive gain, but without consideration of antenna efficiency ( i . e . assuming a lossless antenna ).
11. In this case, rather than quoting the antenna gain, one would be more concerned with the " directive gain " which does " not " include the effect of antenna ( in ) efficiency.
12. "' Partial directive gain "'is the power density in a particular direction and " for a particular component of the polarization ", divided by the average power density for all directions and " all polarizations ".
13. Directive gain is represented as D ( \ theta, \ phi ) and compares the radiant intensity ( power per unit solid angle ) U ( \ theta, \ phi ) that an antenna creates in a particular direction against the average value over all directions:
14. In other words, directive gain is the radiation intensity of an antenna at a particular ( \ theta, \ phi ) coordinate combination divided by what the radiation intensity would have been had the antenna been an isotropic antenna radiating the same amount of total power into space.
15. If only a certain portion of the electrical power received from the transmitter is actually radiated by the antenna ( i . e . less than 100 % efficiency ), then the directive gain compares the power radiated in a given direction to that reduced power ( instead of the total power received ), ignoring the inefficiency.