Horn antennas are high-gain, broadband directional antennas that are fairly easy to manufacture. They work by concentrating RF energy down to a focal point.
Horn Antennas
What’s New
Antenna Parameters: Length
In this post we discuss antenna length, how it is important relative to antenna efficiency and how the optimal antenna length is dependent on the wavelength.
Antennas and Efficiency
Antenna efficiency, not to be confused with VSWR, is a measure of how effectively an antenna is actually radiating power, as opposed to merely absorbing or reflecting it.
The Difference Between Absorption and Reflection
In this article we investigate how absorption and reflection of RF energy behaves. We also discuss how absorption and reflection can affect antenna performance.
Return Path
In this post we examine the signal return path of an antenna, how it works, and why it is important, showing ways this signal flow can be inadvertently hindered.
How Sensitive is This Antenna?
Though there is no basic antenna property of sensitivity, in this post we investigate what is often meant by sensitivity and how it relates to actual antenna parameters.
Antenna Feeds: PC Boards
In this post, we investigate PC board antenna feeds, showing how they work compared to a discreet cable as well as some potential pitfalls in design.
Antenna Feeds: Cables & Lines
In this post, we discuss the several types of wire antenna feeds, and how they should be used and handled to ensure proper operation.
Designing an Antenna: The Requirements
In this post we discuss how optimizing one characteristic of an antenna can negatively affect other aspects of an antenna's performance, and how this relates to new designs.
How Parabolic Dishes Work
The parabolic dish is a means by which the gain of an antenna can be significantly increased by intercepting and concentrating RF at a focal point.
Antennas As Part of a Receiver: Part 2
Historic progress of in the use of an antenna as part of a radio's tuning, how they were overcome, and a clever solution featuring a loop antenna which is still used today.
Antennas as Part of a Receiver
The very narrow bandwidth of small, highly resonant antennas can be used to create a tuning circuit for a radio receiver. Here's how it was done in the early days of radio.
Antennas and Efficiency
If an antenna is inefficient, more transmitting power must be supplied to compensate. Making an antenna efficient therefore enhances range and saves power.
Designing Multiband Antennas
Occasionally, we want a device to have only one antenna that can operate in several specific bands, as distinct from an antenna which covers a broad range of frequencies.
Cellphone Antenna Design
In this post, we summarize the basic mobile antenna design challenges and pitfalls, and how they specifically relate to cellphone applications.
ARSI 
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