Discover the expert in you.
Discover the expert in you.
A slotted waveguide antenna is a directional antenna that is used primarily for microwave radar tasks. It is a long antenna with slots that emit its signal down its middle. A slotted waveguide antenna isn't as effective as a parabolic antenna, which can cover a greater range, but most slotted waveguide antennas are inexpensive and durable. You can attach your waveguide antenna in a relatively short amount of time.
The lower-frequency end of the 80-meter amateur radio band is a hot spot for worldwide long-distance communication using digital modes and Morse code (CW). Because of the long wavelength of 80 meters, antennas tend to be narrow banded in their range of frequencies and can be quite large. A low-footprint loop antenna for the 80-meter band is easy to construct and can be tuned for a greater frequency range on 80 and 75 meters by matching it through a trans-match antenna tuner. When fed with a balanced transmission line, rather than coaxial cable, losses are low and more power gets…
The Belkin F5D8010 Wi-Fi card uses a built-in transmitter/receiver to connect to a home wireless network. To increase the receptive capability of the card, add an external antenna booster that has been hardwired to antennas. The procedure requires supplies from an electronics store, but no special tools that must be purchased. The Belkin Wi-Fi card does not need to be disassembled in order for the modified antenna to be used with it.
Yagi and Uda are two famous Japanese antenna experts that designed the Yagi antenna. Each Yagi antenna is designed to receive specific frequencies, which makes each antenna a different size. The antenna is broken down into four basic parts: the boom, driven element, directors and reflector. This design is for a standard GSM 900 Wi-Fi Yagi antenna. Find the frequencies you wish to pick up and use an online Yagi antenna design program. Once you know the sizes for the elements in the antenna, you can build your own Yagi, substituting your measurements for the ones given here.
This do-it-yourself two meter, two-element hi-gain antenna will give you about 13 dBi + in free space over a quarter wave vertical whip antenna based on various computer models and Web-based antenna information. It was invented by Woodrow Smith, W6BCW, around 1948. It is called the Bobtail Beam after the Bobtail Curtain (not Jim Beam), known for a very narrow radiation pattern and high gain in the high frequency range.
