Statements (57)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:satellite
|
| gptkbp:bfsLayer |
5
|
| gptkbp:bfsParent |
gptkb:UHF_Radio
|
| gptkbp:application |
wireless communication
amateur radio television reception |
| gptkbp:benefits |
compact size
narrow bandwidth high directionality requires precise aiming |
| gptkbp:challenges |
element diameter
element length spacing between elements |
| gptkbp:characteristics |
bandwidth
impedance front-to-back ratio radiation pattern |
| gptkbp:color |
linear polarization
unidirectional pattern |
| gptkbp:construction_material |
gptkb:item
aluminum |
| gptkbp:design |
multiple elements
simple construction element spacing |
| gptkbp:designed_by |
gptkb:Haruhiro_Yagi
|
| gptkbp:frequency |
VHF
UHF 30 M Hz to 3 G Hz |
| gptkbp:has_gameplay_element |
gptkb:Basketball_Player
directors driven element |
| gptkbp:historical_event |
developed in 1926
|
| https://www.w3.org/2000/01/rdf-schema#label |
Yagi antenna
|
| gptkbp:increased |
high gain
|
| gptkbp:installation |
requires alignment
mounted on a mast |
| gptkbp:is_often_used_in |
ham radio
point-to-point communication TV antennas |
| gptkbp:is_used_for |
radio communications
|
| gptkbp:maintenance |
requires periodic maintenance
|
| gptkbp:operational_area |
high efficiency
|
| gptkbp:performance |
affected by weather conditions
affected by surrounding objects |
| gptkbp:points_system |
located at the driven element
|
| gptkbp:product_line |
coaxial cable
|
| gptkbp:related_to |
gptkb:Log-periodic_antenna
gptkb:Dipole_antenna Parabolic antenna |
| gptkbp:size |
varies with frequency
|
| gptkbp:tuning |
requires tuning for optimal performance
|
| gptkbp:type |
directional antenna
|
| gptkbp:used_in |
gptkb:radio_station
satellite communication signal reception |
| gptkbp:values |
typically 50 ohms
typically 6 to 20 d B |