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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

What Is an End-Fed Antenna?

Learn how end-fed antennas work, their advantages, limitations, and why they are popular for portable and HOA-friendly amateur radio installations.

Getting Started HF Fundamentals Reviewed 2026-07-14
Short Answer: Learn how end-fed antennas work, their advantages, limitations, and why they are popular for portable and HOA-friendly amateur radio installations.

Explanation

Overview An end-fed antenna is fed from one end of the radiating element rather than from its center. This allows the feed point to be located near the operator while the wire extends away from the station. End-fed antennas have become extremely popular because they are easy to deploy and require only one primary support point. Advantages Quick deployment. Single support point. Excellent for portable operation. Suitable for HOA-friendly installations. Flexible installation options. Limitations Often requires an impedance transformer. May require a counterpoise. Can be susceptible to common-mode current without proper feed-point isolation. Applications POTA SOTA Camping HOA installations Emergency communications Applied to Chameleon Products The CHA LEFS Series, CHA EMCOMM Series, and several MPAS 2.0 configurations make use of end-fed antenna concepts. Proper installation, feed-point matching, and RF choking help maximize performance. Related Articles Balun vs. Unun What Is Common-Mode Current? What Is a Counterpoise? What Is Feed-Point Impedance? Related Products CHA LEFS 4010 CHA LEFS 8010 CHA EMCOMM II CHA EMCOMM III Base CHA EMCOMM III Portable

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.