Explanation
Overview dBm is a logarithmic unit of power referenced to 1 milliwatt (mW) . Unlike the general decibel (dB), which compares two values, dBm represents an absolute power level. Reference Point 0 dBm = 1 milliwatt Examples dBm Power -30 dBm 1 microwatt -60 dBm 1 nanowatt -90 dBm 1 picowatt 0 dBm 1 milliwatt 30 dBm 1 watt 50 dBm 100 watts Where dBm Is Used Receiver sensitivity. Spectrum analyzers. Signal generators. Laboratory testing. Wireless communications. Applied to Chameleon Products Although most Chameleon antenna specifications use watts, advanced RF measurements involving receivers, analyzers, and laboratory equipment frequently use dBm. Related Articles Watts vs. dBm. What Is a Decibel (dB)? What Is Receiver Sensitivity? What Is RSSI? Related Products All Chameleon Products
The exact result depends on the complete station: frequency, geometry, feed line, matching network, return-current path, environment, operating power, and the reference plane of any measurement. A low SWR establishes an impedance relationship at that point; it does not by itself prove efficiency, radiation pattern, compatibility, or safety.
What to Verify
- Use the newest official product guide or primary service documentation.
- Confirm the exact model, revision, components, configuration, and operating conditions.
- Begin tests at low power and change one variable at a time.
- Do not infer compatibility from connector or thread fit.
Learn Next
- Antenna Selection: A Mission-First Decision Guide
- Engineering Design Tradeoffs in Portable HF Antennas
- Antenna Measurement Reference Planes
- Understanding Common-Mode Current
Source note: Independently synthesized with reference to The ARRL Handbook for Radio Communications, 99th edition (2022), and The ARRL Antenna Book for Radio Communications, 24th edition (2019). Verify changing regulations, services, software, specifications, availability, and safety requirements against current primary sources.
