Antenna wavelength API

Computes free-space and velocity-factor-adjusted wavelength plus full/half/quarter-wave element lengths for a frequency. Answers 'What is the wavelength at this frequency?', 'How long should a quarter-wave antenna be?'.

Price$0.04per request

MethodPOST

Route/v1/electrical/antenna-wavelength

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

electricalantennawavelengthrffrequencyquarter-wavevelocity-factorradio

API URLhttps://x402.hexl.dev/v1/electrical/antenna-wavelength

Integration docs

Example request

{
  "frequencyMHz": 146,
  "velocityFactor": 0.95
}

Example response

{
  "frequencyHz": 146000000,
  "frequencyMHz": 146,
  "velocityFactor": 0.95,
  "freeSpaceWavelengthM": 2.053373,
  "wavelengthM": 1.950704,
  "halfWaveM": 0.975352,
  "quarterWaveM": 0.487676,
  "halfWaveFt": 3.199974,
  "formula": "lambda = (c/f) * velocityFactor"
}

Input schema

{
  "type": "object",
  "required": [],
  "properties": {
    "frequencyHz": {
      "type": "number",
      "examples": [
        146000000
      ]
    },
    "frequencyMHz": {
      "type": "number",
      "examples": [
        146
      ]
    },
    "velocityFactor": {
      "type": "number",
      "examples": [
        0.95
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}