Below is a list of Antenna Design Programs that I hope you find useful with your experimentation and operating efficiency; and as you will see from these programs efficiency is everything.
They do not require installation.
Click the links; then click Open to run from the web or Save to save the program to your hard drive.
Loaded Vertical Antennas & Coil Design
Bandwidth and End-Effect of a Wire-Cage Dipole Antenna
Coax Trap Design of Antenna Traps Using a Solenoidal Coil of Coaxial Line
Coil-Loaded, Ground-Mounted, Vertical or Slanting Antennas
Dipole Tuner + Coax Line + Balun + Balanced Line + Dipole
Performance of a Dipole, Feedline and Balun followed by a Tuner
Input Impedance & Feedline VSWR vs. Frequency
End-Fed End-Fed Antennas, Ground Systems, Tuning & Matching
Half-Wavelength Vertical Antenna and Tuner
Predict Helically Wound Vertical Antennas
Vertical & Dipole Input Impedance of Inverted-L
Performance of an Inverted-V 1/2-Wave-Resonant Dipole + Any Feedline
Type & Value of a Loading Component to Resonate an Antenna Wire
Transmitting Loop Antennas of Various Regular Shapes over a Range of Operating Frequencies
Transmitting Loop Antennas when the Perimeter is Less than 0.75 Wavelengths Long
Multi-Turn, Square, Frame (or Loop) Receiving Aerials
Horizontal, Loop antennas Fed via Balanced or Coaxial Lines
Single-Turn Transmitting Magnetic Loop Antennas of Various Regular Shapes