Linked dipole designer

Design a linked dipole, in inverted-Vee format, tuned for up to six amateur HF bands. This antenna is easy to build and to erect, needs just a single central support, and bands can be quickly changed by opening or closing links between the elements in the antenna.  Read more...

Get started  » » »

  1. Use the controls on the left-hand side to configure your antenna - set the design frequency, antenna element lengths and angles, wire diameter, wire insulation if required, support height, etc.
  2. When you are happy with your configuration, press the "Show antenna" button to display your antenna in interactive 3D graphics mode in the area on the right-hand side. Each time you change your configuration, you should press the "Show antenna" button to register the changes to the app.
  3. After you have configured your antenna, you can then use the controls further down in the page to generate charts and diagrams to evaluate the antenna's performance - you will need to to access these controls.
    You can choose to view any combination of the available charts and diagrams: these include four radiation pattern types: azimuth, elevation, 3D and polarization patterns; other options include VSWR charts, an antenna currents diagram, and a Smith chart.

Antenna sections
No. of bands:
Section #1: kHz ( Innermost - highest f )
Section #2: kHz
Section #3: kHz
Section #4: kHz
Section #5: kHz
Section #6: kHz ( lowest f )
Antenna wire
Wire core: mm  diameter
Insulation: thickness    ?
Ins. type:   Corr. factor:
Antenna supports
Center support: m, height
End support: m, height
Rope extender: m, length
Antenna overview
  Antenna sections
Inner
#1 		#2 #3 #4 #5 #6
Freq. (kHz)
Length (m)
Total (m)
½ Length:   ½ Apex∠:   End height:   
 Linked dipole antenna designer
  1. Use the controls on the left-hand side to configure your antenna.
  2. When you are happy with your configuration, press the "Show antenna" button to display your antenna in interactive 3D graphics mode in this area.
  3. After you have configured your antenna, you can then use the controls further down in the page to generate charts and diagrams to evaluate the antenna's performance ...
Antenna feed-point: ⬥
 

Antenna performance

Here you can generate plots of radiation patterns, VSWR chart, antenna currents diagram and Smith chart for your antenna over a choice of ground types. By changing the physical dimensions of the antenna, and refreshing these plots, you can learn a lot about how such antennas will perform in the field.
Please note that radiation patterns are here modelled over flat ground - when the antenna is erected on a hill-top or mountain summit, the surrounding sloping ground will generally cause angles in the elevation radiation pattern to be lowered in the direction of the slope: the steeper the slope, the lower the effective elevation take-off angle will be, and the better the chances of making long-distance contacts.

Choose antenna section:
Check harmonics?: kHz  ?
Choose ground type of
land in the vicinity
of the antenna: 		   Conductivity: S/m    Dielectric const.: F/m
View radiation patterns:    Set elevation angle for azimuth plot:     ?
  Set azimuth angle for elevation plot:     ?

?
View VSWR chart:
Impedance curves scales:   
View currents diagram
View Smith chart:
Antenna gains
at 0° elevation:
Antenna impedance:
Frequency range: