Shintaro Uda, a Japanese inventor, invented the Yagi-Uda antenna in 1926 with the aid of his colleague Hidetsugu Yagi. Due to its characteristically high gain, modern variants of this antenna are used on high frequency (HF), very high frequency (VHF), and ultra high frequency (UHF) bands.
The directional antenna is primarily made up of a series of linear dipoles, with one driven element acting as the feed and the rest acting as “parasitic” elements. The additional elements are unconnected while the feed element is connected to the transmitter or receiver through a transmission line. These parasitic elements (or passive radiators) are designed to alter the radiation pattern of the radio waves emitted by the powered element, directing them in a single direction. This boosts the antenna’s directivity and, as a result, its gain.
This type of antenna is now referred to as a “beam antenna” or a “parasitic array.” Many people still refer to it as a “Yagi antenna.” This may be because, while Uda was largely responsible for the antenna’s invention, it was Yagi who helped popularise it in the United States.
The horn antenna is a relatively simple and commonly used antenna that dates back to the late 1800s. It was not until decades later, during World War II, that it gained attention. Following his invention of the waveguide in 1936, American inventor Wilmer Lanier Barrow invented the first modern horn antenna in 1938.
Due to their ease of use and ability to make significant gains, horns can be used in a number of applications. They also have a relatively simple construction, which makes them cost-effective in general. The JEM-440 is an example of a modern horn antenna that is both powerful and easy to build.
The modern electromagnetic horn can take many different forms, four of the most popular being E-plane, H-plane, pyramidal, and conical. The type, direction, and amount of taper are all factors that affect the overall output of a horn antenna as a radiator.
The “satellite dish” is perhaps the most well-known antenna among consumers. It’s a parabolic reflector, which is a type of antenna named after its curved surface (parabola). While German physicist Heinrich Hertz invented the first version of the parabolic reflector antenna in 1888, it wasn’t until the 1960s that these antennas became commonplace.
In applications such as microwave relay links that carry telephone and television signals between towns, wireless WAN/LAN links for data communications, and satellite communications, parabolic antennas are used as high-gain antennas. For decades, these antennas have been used in spacecraft communications.
Furthermore, parabolic antennas are typically used as radar antennas to locate ships, aircraft, and guided missiles.
Microstrip antennas first gained prominence in the 1970s, despite the fact that they were invented in 1953. Due to their characteristically low profile, they are extremely useful in aircraft, spacecraft, satellite, and missile applications, as well as handheld radio and wireless communications. They’re also naturally light, cheap to make, and simple to mount. The RFD-8696 is an example of a patch antenna that can be used in a variety of circumstances.
The ability to print microstrip antennas directly onto a circuit board is a distinguishing feature of modern microstrip antennas.
The Planar Inverted-F antenna (PIFA), a type of patch antenna, is a common component in handheld devices. Its name comes from its shape, which is shaped like an inverted “F.”
The PIFA has an omnidirectional pattern of resonance. More significantly, it does so at a quarter-wavelength, enabling manufacturers to reduce the amount of space needed for the part inside a mobile device.
SAR properties of PIFAs are also favourable. SAR is a measure of how much RF energy is consumed by human tissue and is a function of electrical conductivity. “Specific Absorption Rate” is the abbreviation for “Specific Absorption Rate.”
All of the antenna designs mentioned above are still in use today. Indeed, as a result of several changes to their designs, they have become much more useful than they were when they were first invented. As antenna architecture advances at an even faster rate, it’s crucial to test the resulting products quickly and efficiently.
Jhon Mark is a straightforward techie with a passion for writing. He loves delving into the inner workings of one of the best Conical Horn Antennas from Monday to Friday.
On the other hand, on the weekends, he is a little more relaxed and simply enjoys spending time with his dog.