Your First HF Antenna: Dipole, Vertical or End-Fed
The first antenna question is usually asked the wrong way round. People ask which antenna is best. The better question is which antenna your space, height and patience actually allow, because a compromised antenna that is up and working beats an ideal one that never gets built.
Three designs cover almost every first installation. They fail and succeed in different ways.
Height Matters More Than Type
Before comparing designs, one fact dominates everything else for long-distance work: the height of a horizontal antenna above ground determines the angle at which it radiates.
Low horizontal antennas send most of their energy upward. That is excellent for regional contacts and poor for distant ones. Raising the same antenna lowers the radiation angle and improves long-distance performance considerably — often more than any change of design would.
This is why experienced operators say “get it as high as you can” rather than recommending a specific antenna. A simple wire at a good height outperforms a sophisticated array at a poor one.
The Three Common Choices
| Dipole | Vertical | End-fed wire | |
|---|---|---|---|
| Space needed | Full length, two supports | Small footprint, one support | One support at each end, flexible shape |
| Radiation angle | Depends heavily on height | Naturally low | Depends on installation |
| Ground requirement | Minimal | Substantial — radials matter | Needs a counterpoise or good choking |
| Bands covered | One, unless fanned or trapped | One, unless trapped or tuned | Often several with a matching unit |
| Feedline handling | Straightforward with a choke | Straightforward | Common-mode current is the main risk |
| Typical first-install problem | Too low | Too few radials | RF in the shack |
The dipole is the reference design for good reason: predictable, cheap, and forgiving. Its weakness is that it needs two supports at a useful height and its full length, which many gardens do not offer. Bent, sloping and inverted-V variants all work and all cost some performance, which is an acceptable trade.
The vertical solves the space problem and radiates at a naturally low angle, which suits long-distance work. Its weakness is that it depends on an effective ground system. A vertical with two radials is a poor antenna; the same vertical with a proper radial field is a genuinely good one. This is where most disappointment with verticals comes from — the antenna is judged while half of it is missing.
The end-fed wire with a matching transformer is popular because it needs support at only one end and often covers several bands. Its weakness is that the feedline tends to become part of the antenna, producing common-mode current, RF in the shack, and unpredictable behaviour. A good common-mode choke is not optional here.
The Parts People Skip
Three components decide whether an antenna works as intended, and all three are routinely treated as afterthoughts.
The feedline. Loss in coax rises with frequency and with length, and cheap cable that seems adequate on lower bands becomes wasteful higher up. Water ingress makes it progressively worse and is invisible until you measure. Buy decent cable and seal the connectors properly — the sealing is what fails first.
The common-mode choke. Without one, current flows on the outside of the coax braid and the feedline radiates. Symptoms include SWR that changes when you touch the cable, interference with domestic electronics, and RF burns on the microphone. A choke at the feedpoint solves most of it.
The ground system. For a vertical this is half the antenna. For a horizontal antenna it matters less electrically, but safety grounding and lightning protection are not optional regardless of design.
A Realistic First Installation
- Measure the space honestly. Actual usable distance between supports, actual achievable height. Optimism here produces a disappointing antenna.
- Pick the band that matters most. A single-band antenna done properly beats a multiband compromise done badly, and you can add bands later.
- Build it slightly long and trim. Every calculation is approximate because surroundings affect resonance. Cutting is easy; adding is not.
- Sweep the SWR curve rather than checking one frequency. The shape tells you whether to shorten or lengthen — a point reading does not.
- Add the choke before concluding anything. Many puzzling results disappear once the feedline stops participating.
- Weatherproof properly. The failure will be at a connector, in winter, and it will be gradual enough that you blame propagation first.
Safety Is Not a Footnote
Antenna work involves height, and often proximity to power lines. No antenna is worth a serious injury.
Keep every part of the installation, including the erecting process, well clear of overhead power lines — accounting for the whole length of anything you are raising, and for it falling. Ground the system against lightning according to local practice, and disconnect feedlines during storms. Avoid transmitting where anyone can touch the antenna, and respect RF exposure guidance for your power level and frequency.
These rules vary by country. Take them from your national regulator or society, not from an article.
Frequently Asked Questions
Can I use an antenna tuner instead of a resonant antenna?
A tuner lets the transmitter work into a mismatch. It does not reduce loss between the tuner and the antenna, and with a lossy feedline that loss can be substantial. It is a useful tool, not a substitute for a reasonable antenna.
How high does a dipole need to be?
Higher is better, and the useful measure is height relative to wavelength rather than metres. For long-distance work a low dipole disappoints; for regional contacts it works well. If the available height is low, a vertical may serve better.
How many radials does a vertical need?
More than most installations have. Performance improves steadily as radials are added, with the biggest gains early. A handful is a compromise; a substantial field is where the antenna starts behaving as intended.
Why do I get RF in the shack?
Common-mode current on the feedline, almost always. Fit a choke at the feedpoint and, if needed, another at the station end. End-fed designs are particularly prone to this.
Is a multiband antenna a bad idea?
Not bad, just a compromise. Traps and matching networks add loss and narrow bandwidth. For a first antenna covering several bands conveniently, the compromise is usually worth it.
Does an expensive commercial antenna outperform a home-made wire?
Not reliably. A well-built wire dipole at a good height is competitive with commercial designs costing far more. What you buy with a commercial antenna is convenience, mechanical robustness and smaller size — not necessarily performance.
The Bottom Line
Choose the antenna your space allows, get it as high as you safely can, and spend the effort on the parts nobody photographs — the feedline, the choke and the ground system.
Then measure the SWR curve rather than a single number, and remember that a good reading proves a match, not efficiency.
More on the blog index, including what an SWR meter is really telling you. For design detail and safety practice, the ARRL antenna resources are the standard starting point.