Telecommunication Journal, 58. sējumsInternational Telecommunication Union., 1991 |
No grāmatas satura
1.–3. rezultāts no 71.
720. lappuse
... antenna crossed dipole antenna vertical monopole array HR m / n / h rhombic antenna m = 4 to 8 n = 3 to 6 0.4≤h≤1.0 ( not recommended ) curtain array HR 2 / n / h n = 3 or 4 0.4≤h≤1.0 wide horizontal beamwidth narrow directional ...
... antenna crossed dipole antenna vertical monopole array HR m / n / h rhombic antenna m = 4 to 8 n = 3 to 6 0.4≤h≤1.0 ( not recommended ) curtain array HR 2 / n / h n = 3 or 4 0.4≤h≤1.0 wide horizontal beamwidth narrow directional ...
723. lappuse
... antennas may also be stacked to achieve a more directive vertical radiation pattern and thus a higher directivity gain . Figure 4 - Quadrant antenna A crossed - dipole antenna consists of two horizontal centre - fed half - wave dipoles ...
... antennas may also be stacked to achieve a more directive vertical radiation pattern and thus a higher directivity gain . Figure 4 - Quadrant antenna A crossed - dipole antenna consists of two horizontal centre - fed half - wave dipoles ...
724. lappuse
4.3 Rhombic antennas A rhombic antenna consists of four hori- zontal straight wires of the same length arranged in the form of a rhombus . A rhombic antenna typically has side lengths of several wavelengths and a height of between 0.5 ...
4.3 Rhombic antennas A rhombic antenna consists of four hori- zontal straight wires of the same length arranged in the form of a rhombus . A rhombic antenna typically has side lengths of several wavelengths and a height of between 0.5 ...
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