Antenna design made simple Planning and cutting antenna wires often raises the same questions: how long should the dipole arms be?, what if I use insulated wire?, or how much do I need to trim if the resonance is off? This calculator helps you estimate the correct lengths for common amateur-radio antennas (dipoles, verticals, EFHW,…
An ugly balun (air-core coaxial choke) is a simple and effective way to suppress common-mode currents on the feedline of your HF antenna. It consists of several turns of coax wound tightly on a non-conductive form such as a PVC pipe or even a soda can. This calculator helps you quickly design your own ugly…
This calculator helps you estimate coaxial cable loss at your chosen frequency and length. By entering frequency, cable type, and length (in meters or feet), you can see how many decibels are lost and what percentage of transmitter power actually reaches the antenna. If you also provide transmitter power in watts, the tool will calculate…
Estimate the maximum distance of your radio link based on frequency, transmitter power, antenna gain, and antenna height. The calculator also considers the optical line-of-sight limit — beyond the horizon, communication is not always possible. Why radio range matters Radio communication is the backbone of countless technologies, from amateur radio and aviation to Wi-Fi, maritime…
Designing an efficient magnetic loop antenna requires precise calculations of loop dimensions, conductor diameter, and tuning capacitor values. This calculator helps you determine the key parameters for building a magnetic loop antenna for HF and VHF bands. Simply enter your desired frequency, loop diameter, and conductor size to get optimal values for inductance, capacitance, and…
