|
Parabolic Antenna |
|
 |
 |
Gain (typ): 10 to 60 dB
Bandwidth: 33% (1.4:1)
Frequency Limit: Lower - 400
MHz
(due to size) Upper -
13+ GHz
Polarization: Polarization
of feed
Half-Power Beamwidth: 1 to
10º |
|
G=20 log (D/l) + 10
log (a) + 9.938 dB |
D= diameter
a = illumination
factor
(typ
= 0.6)
l= wavelength |
|
|
Dipole Antenna, 1/2 Wave |
|
 |
Elevation Pattern |
Gain (typ): 2 dB
Bandwidth: 10% (1.1:1)
Frequency Limit: Lower -
none
Upper - 8 GHz (due to size)
Polarization: Linear (vertical
as shown)
Half-Power Beamwidth (typ):
80º x 360º
Notes: Pattern and lobing
change significantly with
L/f. Used as gain reference
for f < 2 GHz. |
|
Azimuth Pattern |
|
Vertical Whip Antenna, 1/4
Wave |
|
Configuration |
Elevation Pattern |
Gain (typ): 2 to 6 dB
Bandwidth: 10% (1.1:1)
Frequency Limit: Lower -
none
Upper - none
Polarization: Linear (vertical
as shown)
Half-Power Beamwidth (typ):
45º x 360º
Notes: Polarization changes
to horizontal if antenna is
rotated to horizontal. |
|
Azimuth Pattern |
|
Log-Periodic Array |
|
|
|
Yagi Array |
|
 |
Elevation Pattern |
Gain (typ): 5 to 15 dB
Bandwidth: 5% (1.05:1)
Frequency Limit: Lower - 50
MHz
Upper - 2 GHz
Polarization: Linear (horizontal
as shown)
Half-Power Beamwidth (typ):
50º x 50º |
|
Azimuth Pattern |
|
Circular Loop |
|
 |
Elevation Pattern |
Gain (typ): -2 to 2 dB
Bandwidth: 10% (1.1:1)
Frequency Limit: Lower - 50
MHz
Upper - 1 GHz
Polarization: Linear (horizontal
as shown)
Half-Power Beamwidth (typ):
80º x 360º |
|
Azimuth Pattern |
|
Square Loop |
|
 |
Elevation Pattern |
Gain (typ): 1 to 3 dB
Bandwidth: 10% (1.1:1)
Frequency Limit: Lower - 50
MHz
Upper - 1 GHz
Polarization: Linear (horizontal
as shown)
Half-Power Beamwidth (typ):
100º x 360º |
|
Azimuth Pattern |
|
Horn |
|
 |
3 dB beamwidth 56 * l / h
Elevation Pattern |
Gain (typ): 5 to 20 dB
Bandwidth: 120% (4:1) -
ridged
67% (2:1) -
non-ridged
Frequency Limit: Lower - 50
MHz
Upper - 40 GHz
Polarization: Linear (vertical
as shown)
Half-Power Beamwidth (typ):
40º x 40º |
|
3 dB beamwidth 70 * l
/ w
Azimuth Pattern |