Antenna Handbook

active loop antenna

 An active loop antenna is a type of loop antenna that uses a built-in amplifier to boost the signal strength. This makes it more sensitive than a passive loop antenna, but it also introduces some additional noise. Active loop antennas are typically smaller than passive loop antennas, which makes them more portable and easier to install.

Here is a illustration of a typical active loop antenna:

The antenna consists of a loop of wire or tubing, which is connected to an amplifier. The amplifier boosts the signal strength and reduces noise. The antenna is typically mounted on a tripod or other support.

Here are some images of active loop antennas:

Design Considerations

When designing an active loop antenna, there are a few key factors to consider:

  • Loop size: The size of the loop determines the frequency range of the antenna. A larger loop will have a lower resonant frequency, while a smaller loop will have a higher resonant frequency.
  • Loop shape: The shape of the loop can also affect the antenna's performance. A circular loop is the most common shape, but other shapes, such as square or triangular loops, can also be used.
  • Amplifier: The amplifier is the most important component of an active loop antenna. It should be chosen carefully to ensure that it has the appropriate gain and bandwidth.

Construction

Once you have considered the design factors, you can begin constructing your active loop antenna. The following steps provide a general overview of the construction process:

  1. Cut a length of wire or tubing to the desired loop size.
  2. Form the loop into the desired shape.
  3. Connect the loop to the amplifier.
  4. Mount the antenna on a tripod or other support.

Tuning

Once the antenna is constructed, it is important to tune it to the desired frequency range. This can be done by adjusting the length of the loop or by using a variable capacitor.

Use

Once the antenna is tuned, it can be used to receive radio signals. To do this, simply connect the antenna to a receiver. The receiver will amplify and demodulate the signal, so that it can be heard or seen.

Active loop antennas are a versatile and effective type of antenna. They can be used for a variety of applications, such as receiving shortwave and mediumwave radio signals, radio direction finding, and amateur radio.

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Illustration Images

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What is an Antenna ?

 An antenna is a device that transmits and receives electromagnetic waves. Electromagnetic waves are a form of energy that travels through space at the speed of light. They include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Antennas are used in a wide variety of applications, including:

  • Radio and television broadcasting
  • Cellular and mobile communications
  • Satellite communications
  • Radar
  • GPS
  • Wi-Fi
  • Bluetooth
  • RFID
  • Wireless security systems
  • Microwave ovens

Antennas come in many different shapes and sizes, depending on their application. Some common types of antennas include:

  • Dipole antennas: These are the simplest type of antenna, consisting of a straight wire or rod. Dipole antennas are omnidirectional, meaning they radiate and receive signals in all directions.
  • Yagi antennas: These antennas are made up of a dipole antenna plus one or more reflectors and directors. Yagi antennas are directional, meaning they radiate and receive signals in a specific direction.
  • Dish antennas: These antennas are parabolic in shape and are used to focus signals in a narrow beam. Dish antennas are often used for satellite communications and radar.
  • Omnidirectional antennas: These antennas radiate and receive signals in all directions. They are often used for indoor applications, such as Wi-Fi and Bluetooth.

Antennas work by converting electrical signals into electromagnetic waves and vice versa. When an electrical current is applied to an antenna, it creates an electromagnetic field. This field travels through space in the form of radio waves. When an electromagnetic wave hits an antenna, it induces an electrical current in the antenna. This current can then be amplified and processed by a receiver.

The design of an antenna determines its frequency range, directivity, and gain. The frequency range is the range of frequencies that the antenna can transmit and receive efficiently. The directivity is the direction in which the antenna radiates and receives signals. The gain is the measure of how well the antenna amplifies signals.

Antennas are an essential part of many modern technologies. They allow us to communicate with each other, access information, and navigate the world around us.

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How to Troubleshooting Antenna TV Reception ?

 To troubleshoot antenna TV reception, you can follow these steps:

  1. Check your connections. Make sure that the coaxial cable is securely connected to both the antenna and the TV. You may also want to try using a different coaxial cable, just in case the current one is damaged.
    Checking the connections of an antenna TVTerbuka di jendela baruwww.lifewire.com
  2. Check your antenna's placement. Make sure that the antenna is in a high location, away from obstructions such as trees, buildings, and power lines. If possible, try to point the antenna directly at the TV broadcast towers. You can use an online TV antenna locator to find out where your local broadcast towers are located.
    Checking the placement of an antenna TVTerbuka di jendela baruwww.antennasdirect.com
  3. Use an antenna amplifier. If you live in a weak signal area, using an antenna amplifier can help to boost the signal.
  4. Scan for channels. Once you have made sure that your connections are secure and your antenna is in a good location, scan for channels on your TV. This will help to identify any channels that are available in your area.
    Scanning for channels on a TVTerbuka di jendela baruwww.samsung.com
  5. Try a different antenna. If you are still having trouble getting good reception, you may want to try using a different antenna. There are many different types of antennas available, so you may need to experiment a bit to find one that works best for your location.

Here are some additional tips:

  • If you are using an amplified antenna, make sure that the amplifier is turned on and properly grounded.
  • If you are still having trouble getting good reception, try using a coaxial cable extender to connect the antenna to your TV.
  • If you are using a split-and-tap connector to split the signal from your antenna to multiple TVs, make sure that the connector is rated for the number of TVs that you are connecting.
  • If your antenna is outdoors, make sure that it is properly protected from the elements.

If you have tried all of the above and are still having trouble getting good reception, you may want to contact a professional antenna installer for assistance.

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The Best Transmitter Locator Antenna App

 


The best transmitter locator antenna app is the one that works best for your specific needs and location. However, here are a few of the most popular and highly-rated options:

  • Antenna Point (Android and iOS): This app uses your phone's GPS and compass to identify nearby TV transmitter towers. It also provides information about the distance to each tower, the azimuth, and the elevation.
  • TV Signal Finder (Android and iOS): This app is similar to Antenna Point, but it also provides additional information, such as the channel numbers and frequencies of the transmitters.
  • TV Fool (web): This website provides a detailed map of TV transmitter towers in the United States. It also allows you to enter your specific location to generate a custom report that shows the channels that you are likely to receive.

To use a transmitter locator antenna app, simply open the app and allow it to access your phone's GPS and compass. The app will then display a map of nearby TV transmitter towers. You can then zoom in and out of the map, and tap on the towers to get more information about them.

Once you have found a tower that you want to point your antenna towards, you can use the app's compass to align your antenna in the correct direction.

Here are some tips for using a transmitter locator antenna app:

  • Make sure that you have a good GPS signal. This will help the app to accurately locate your position.
  • Calibrate your phone's compass. This will help the app to provide accurate compass readings.
  • Use the app to find a tower that is in the line of sight of your antenna. If there are any obstacles between your antenna and the tower, this will reduce the signal strength.
  • Use the app to align your antenna in the correct direction. The app should provide you with an azimuth reading, which is the angle that you need to point your antenna in.
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