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Longer antennas aren’t always the better choice
- As you’d expect, signals from long car antennas can travel farther than the ones from shorter ones. However, there’s more to it than meets the eye and longer antennas aren’t always the better choice. Short antennas have higher frequencies. So, for the best experience, the antenna shouldn’t be too long or too short.
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Jan 26, 2024 · The general rule with antennas is that the antenna itself should be an even fraction of the wavelength it’s trying to receive. That sounds pretty technical. But what it means is, the lower the frequency, the bigger the antenna you need.
Having a very long antenna for a frequency that requires a short antenna doesn’t make it better, necessarily. There are exceptions to the rule. But bottom line is that length of the antenna alone is not enough to determine a valid answer to your question.
May 5, 2022 · A higher frequency needs a shorter antenna and vice versa. I can see that with a high frequency like 500 kHz, an antenna should be around 28,000 cm (280 m) in length, otherwise the EM waves are too long to resonate your antenna properly: Dipole Calculator.
Sep 29, 2015 · Antenna sensitivity for a fixed length depends on the wavelength of receiving radiation. Antennas are usually designed having a length of half or full wavelength or even quarter.
There are several factors at play — like whether the impedance is something decent (for linear antennas, the overall trend is upwards as you add more wavelengths), and whether the pattern is useful at all (more length = more lobes).
Sep 11, 2015 · Longer antenna elements are resonate at lower frequencies. Shorter antennas are resonate at higher frequencies. There are ways to combine elements to make them resonate a different frequencies. Do keep in mind that if the antenna is not resonate at a specific frequency it does not create an "RF brick wall".
Aug 17, 2023 · The different parts of antennas and how they relate to each other. Antennas rely on size to be effective. This includes their height and length. However, bigger isn’t necessarily better. For example, taller antennas don’t always have greater range than shorter ones.
