Signal to Noise Ratio Calculator (SNR dB, Shannon Capacity)
Maybe you’ve stood in a room that had only one bar of signal on your phone. Maybe you’ve heard about the signal to noise ratio, … Read More
JSCalc
dB Gain Calculator: Power & Voltage Ratio to Decibels
When you see a decibel readout, you’re measuring a relationship. You’re not measuring power. It sounds like semantics, but that difference matters when you think … Read More
dBm to Watts Converter | Convert dBm, mW, W and Voltage
This is the dBm to watts converter. The decibel-milliwatt scale is convenient as an engineer’s shorthand, particularly when specifying link budgets or the output of … Read More
Reflection Coefficient Calculator: Gamma Magnitude and Phase
So you’ve got your coax hooked up, your antenna’s tuned, fired up the transmitter, and noticed that the reflected power increases as the power meter … Read More
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
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