Return Loss Calculator | dB from VSWR, Gamma, Impedance & Power
In radio frequency engineering, there’s this thing called return loss which confounds even seasoned engineers and many hams. What is it? Simply put, this calculator … Read More
JSCalc
VSWR Calculator: Standing Wave Ratio, Return Loss & Match
For an RF engineer, single number they reach for first when checking antenna match is voltage standing wave ratio. That’s because it measures how much … Read More
Antenna Height for Line of Sight Calculator (Radio LOS)
Every wireless link designer starts with same annoying question: how tall does my mast actualy need to be? VHF and microwave band radios is basically … Read More
Fresnel Zone Radius Calculator: Clearance & Earth Bulge
Even if a radio antenna’s path seems free of obstructions when viewed visually, it may actualy be blocked by something beyond its reach. That’s due … Read More
RF Link Budget Calculator: EIRP, FSPL, Rx Power & Margin
When two radios talk to each other over a radio link, they use a running tally of decibels called a radio frequency link budget. This … Read More
Free Space Path Loss Calculator (FSPL, Friis Formula)
Why? Because radio waves is like water flowing off side of a bucket: They expand as they go; they thin out to nothing in background … Read More
Antenna Beamwidth Calculator | HPBW, E/H Plane & Gain
Getting your dish pointed is a tricky business, especially the first time you try. That’s because your margin of error might be smaller than a … Read More
Antenna Gain Calculator | dBi, dBd, Linear & Aperture
The key take-away here: antenna gain isn’t magic. Passive antennas does not magically add any more power to your signal; they can’t make energy from … Read More
Yagi Antenna Element Calculator – Length & Boom Sizing
You can spot the traditional-looking pointed-beam antenna, or Yagi-Uda antenna, on radio amateur towers and rooftops around town. It has parasitic rods added in a … Read More
Half Wave Dipole Length Calculator | 468/f Antenna Sizing
In radio work, reference antenna is the half wave dipole. It consists of one straight conductor cut to half a wavelength, with the feed point … Read More