Above the freespace azimuth pattern
Above the freespace elevation pattern
Above the SWR plot
Above the antenna Q factor over its 2;1 SWR Bandwidth
If the Q factor is below 15 over a wide range of frequencies above and below the operating band, these
are very good stable antennas.
Q factors between 15 and 30 over a wide range of frequencies above and below the operating range
represent acceptable values for slightly less stable antennas.
Q factors between 30 and 50 indicate that they are relatively unstable antennas, although often in some
narrow part of the range they can have a lower Q factor.
Q factors over 50, regardless of the possible narrow parts of the lower Q band, represent extremely
unstable antennas. (SOURCE: YU1AW)
Above the Gain / Front to back and Front to rear versus frequency.
For: DX portion 11 meter band
Antenna Type: 6el CUBICAL QUAD
Designed by: EA1DDO / 19DX348
Boom length: 12,84 Meter
Gain: 12,30 dBI (@27,025 Mhz)
FB <27 dB
FR <19,44 dB
Impedance: 50 ohms, direct fed
SWR below 1:1.1 > 300 Khz.
SWR below 2:1 > 700 Khz
Element dimensions:
The elements are made from 3mm diameter copper wire without isolation !
If you need other diameters please mail !
Element Length Distance
Reflector 2,900 m 0 m
Radiator 2,806 m 2,165 m
Director 1 2,750 m 3,366 m
Director 2 2,752 m 6,171 m
Director 3 2,730 m 9,576m
Director 4 2,600 m 12,838 m
Yes, director 2 is longer then director 1.
This antenna is based on orignal work from EA1DDO, please visit his site for more “CUBICAL QUAD” information. (LINK)