Delta loop antenna designer

Design a vertical-plane delta-loop antenna for a single amateur HF band, in one of two different configurations:

For each configuration, different feed-point positions in the loop may be chosen, each of which will result in the antenna displaying different
polarization properties, radiation patterns and feed-point impedances.  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.

Set antenna color:    
Principal band
Band:
Frequency: kHz    Info
Nom. length : m     Corrected length:   m Info
Antenna configuration
Configure
antenna as:
Antenna feed-point position
Feed-point position: Info
Antenna wire
Wire core: mm  diameter
Insulation: thickness    Info
Ins. type:   Corr. factor:
Antenna foot height AGL
Foot height: m
Delta loop triangle height, as fraction of wavelength
Delta height: λ m Info
Lower point height AGL
Point height: m
Delta loop triangle height, as fraction of wavelength
Delta height: λ m Info
Antenna apex angle  (calculated)
Apex angle: degrees
Antenna overview
Antenna sections lengths Horizontal section height Full
height
#1 #2 #3 #4
 
 Delta loop 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 - generally speaking, when an antenna is erected on a hill-top or mountain summit, surrounding sloping ground will often cause angles in the elevation radiation pattern to be lowered in the direction of the slope.
The degree to which the elevation pattern may be lowered depends on many factors, including the main configuration of your delta-loop antenna (whether apex-up or apex-down), and the choice of feed-point position, both of which affect the polarization direction.

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:     Info
  Set azimuth angle for elevation plot:     Info

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