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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

What Is an Antenna Switch?

Learn what an antenna switch is, how it works, and why it is useful for amateur radio stations with multiple antennas.

Station Accessories Station Hardware Reviewed 2026-07-14
Short Answer: Learn what an antenna switch is, how it works, and why it is useful for amateur radio stations with multiple antennas.

Explanation

Overview An antenna switch allows an amateur radio operator to quickly select one of several antennas without disconnecting and reconnecting coaxial cables. Antenna switches are commonly used in stations that operate multiple HF, VHF, and UHF antennas or compare different antenna systems. Typical Applications Select between multiple HF antennas. Switch between directional and omnidirectional antennas. Compare antenna performance. Separate receive and transmit antennas. Features Manual or remote operation. Two-position to multi-position switching. 50-ohm impedance. High power capability. Low insertion loss. Selection Considerations Maximum operating power. Frequency range. Isolation between ports. Weather resistance for outdoor models. Applied to Chameleon Products An antenna switch makes it easy to compare Chameleon antenna systems, such as switching between a CHA MPAS 2.0, CHA LEFS Series antenna, or CHA TDL without reconnecting feed lines. Related Articles What Is a Coax Switch? What Is a Dummy Load? What Is SWR? How Do You Choose the Right Coaxial Cable? Related Products All Chameleon HF Antennas

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.