Statements (56)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:radio_station
|
| gptkbp:antenna_tuner |
may be used to improve performance
|
| gptkbp:application |
gptkb:broadcasting
amateur radio television transmission |
| gptkbp:color_scheme |
linear polarization
|
| gptkbp:common_mode_currents |
can be an issue without proper balun
|
| gptkbp:construction_material |
can be made from copper or aluminum
|
| gptkbp:design |
simple to construct
|
| gptkbp:difficulty |
relatively low complexity
|
| gptkbp:directionality |
non-directional in the horizontal plane
|
| gptkbp:element |
two conductive elements
|
| gptkbp:feed_line |
requires a feed line for connection
|
| gptkbp:feed_point_impedance |
approximately 73 ohms
|
| gptkbp:feed_system |
located at the center
|
| gptkbp:frequency |
varies based on length
provides good signal strength when properly installed |
| gptkbp:ground_plane |
can be used with or without
|
| gptkbp:grounding |
may require grounding for safety
|
| gptkbp:has_variations |
can be modified for specific needs
|
| https://www.w3.org/2000/01/rdf-schema#label |
Half-wave dipole
|
| gptkbp:impedance |
varies with frequency and installation height
|
| gptkbp:impedance_matching |
important for minimizing reflections
|
| gptkbp:increased |
typically around 2.15 d Bi
|
| gptkbp:installation |
can be installed as an inverted V configuration
can be installed horizontally or vertically |
| gptkbp:installation_height |
affects performance
|
| gptkbp:length |
half the wavelength of the frequency used
length = 468 / frequency in MHz |
| gptkbp:maintenance |
requires minimal maintenance
|
| gptkbp:match_type |
requires matching for optimal performance
|
| gptkbp:material |
often made from insulated wire
|
| gptkbp:notable_applications |
used in VHF and UHF communications
used in ham radio used in shortwave radio |
| gptkbp:operational_use |
high efficiency
generally high in open space |
| gptkbp:performance |
affected by nearby objects
can be enhanced with additional elements |
| gptkbp:price |
generally low cost to build
|
| gptkbp:radiation |
emits electromagnetic waves
|
| gptkbp:radiation_angle |
depends on height above ground
|
| gptkbp:radiation_efficiency |
depends on construction quality
high in free space |
| gptkbp:radiation_pattern |
figure-eight
|
| gptkbp:ram |
limited bandwidth
|
| gptkbp:safety |
should be installed away from power lines
should be taken during installation. |
| gptkbp:tuning |
can be adjusted using traps or coils
can be tuned for different frequencies |
| gptkbp:type |
radio antenna
|
| gptkbp:type_of |
gptkb:end-fed_dipole
center-fed dipole |
| gptkbp:water_resistance |
can be affected by environmental conditions
|
| gptkbp:bfsParent |
gptkb:Dipole_antenna
|
| gptkbp:bfsLayer |
6
|