We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a Sleeve Antenna?

By G.W. Poulos
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A sleeve antenna is a specific design of radio wave antenna used for both the reception and transmission of radio frequency signals. The two-element construction of the sleeve antenna is what gives the device its name. In its simplest and most common form, a sleeve antenna has a straight metal element, often a rod or wire, placed and centered inside a straight metal tube, which acts as a sleeve over the center element. While a sleeve antenna can be made to work with practically any radio frequency, it gets the most use in high-frequency band applications such as CB radio base station or maritime ship-to-ship, ship-to-shore radio antennas.

An antenna may be classified in many ways, and the sleeve antenna falls into several different category types. First, having two separate elements, a sleeve antenna is classified as a dipole-type antenna, meaning it has two poles. Second, it is also classified as a half-wave antenna, meaning that the antenna is best suited to receive or transmit at a radio wavelength twice the antenna’s physical length. Third, these antennas, which are mounted vertically, can receive and broadcast in all directions simultaneously, making them members of the omnidirectional class of antennas. Finally, because both elements of the antenna share the same centerline, it can be described as a coaxial antenna, meaning that the two poles have a common center axis.

Like all radio antennas, a sleeve antenna operates on the principle of frequency resonance. Frequency resonance dictates that a specific radio frequency transmission will cause a specific length of metal to resonate at an atomic level and generate an AC electrical current. This generated current, identical in structure and modulation to the original radio signal, is then passed through other electronics, like a radio, so the signal can be heard. Likewise, if a radio applies an AC signal to a specific sized piece of metal, that metal will resonate. As it does, it will transmit the signal in the form of radio waves, which in turn, can be received by another antenna.

The range of radio wave frequencies that can cause a given piece of metal, or antenna, to resonate is called the bandwidth. Because sleeve antennas have a wide differential between the inner element and the outer element, they can receive and transmit a relatively broad range of radio frequencies. This attribute makes them useful in many applications, even though the antennas themselves are not as efficient at converting radio waves to electrical current as other types, which may have two or more elements fully exposed to the radio waves.

Despite the diminished efficiency, sleeve antennas do not have the thin and spindly elements needed in many other antenna designs. This makes them physically sturdier than most other antennas. As a result, they are most often used in applications where the antenna must endure severe weather conditions and still operate properly, such as on ships or as permanently mounted outdoor CB antennas.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.