Delta loop antenna designer

Design a delta-loop antenna for a single amateur HF band, which requires one single central support only, and which propagates at low elevation angles, predominantly in vertical polarization. These attributes make the delta-loop antenna an attractive proposition for single-band DX work.  Read more...

Set antenna color:    
Band: kHz
Loop length: m?
Antenna wire diameter
Wire diam. : mm
Antenna foot height
Foot height: m
Antenna apex height above foot, as fraction of wavelength
Apex height: λ m
Antenna apex angle  (calculated)
Apex angle: degrees
Antenna feed-point impedance  (estimated)
Impedance: Ω  ?
Antenna overview
Antenna sections lengths Foot height Full height Est. F-P
#1 #2 #3 #4
Press the "Show antenna" button to display your antenna
configuration here in interactive 3D graphics mode
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.
This effect is much less evident with the delta-loop antenna, since the predominantly vertically-polarized waves radiated by the antenna are emitted mostly horizontally, such that reflections from the ground will be minimal, with the resulting elevation radiation pattern being only slightly affected by downward-sloping ground.

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:  °    ?

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