Here is the rule: The horizontal distance between antennas should be greater than 1/4 of its wavelength (absolute minimum separation), but it should not be located at the exact multiples of its wavelength (maybe avoid the first 3-4 multiples).
Antenna Positioning: Distance Between Antenna
For effective diversity performance, AB antennas should not be positioned less than ¼ wavelength apart, and ideally, they would be placed ½ to one full wavelength apart.
Distance between antennas
The distance between the two diversity antennas should be at least one quarter of a wavelength, and the distance between them will affect the signal.
If antennas are placed too close together, the booster may experience oscillation. Oscillation occurs when the antennas pick up each others signals and create a feedback loop.
The rule of thumb to set the antenna physical dimension ensures that the current travel path P approaches to a quarter of wavelength at the lowest operational frequency.
With this 5dBi antenna, theoretically a distance of about 500 meters can be covered. As the requirement for wireless connectivity grows, companies often want to provide focused wireless coverage in large areas like auditoriums, cafeterias or even between buildings.
A: For the best performance, we typically recommend placement of your TV antenna at the highest point available to you and with a clear line of sight to the broadcast towers to minimize the possibility of obstructions between your antenna and the broadcast towers it is receiving signals from.
Antennas should all be oriented in the same direction, pointing vertically out of the sensor. If the sensor is mounted flat on it's back on a horizontal surface, you should bend the antenna as close to the sensor housing as possible giving you the most amount of antenna pointing vertical.
Yes, the greater the length of coax cable you use, the more signal loss you will experience.
Can I mount two antennas next to each other? If using two antennas on a vehicle, it is recommended to have a minimum of 300mm separation distance between the antennas to ensure no interference.
Connecting a coaxial splitter to your TV antenna is a simple task. All you need to do is attach the splitter to the coaxial cable from your TV antenna. You can then attach coaxial cables to the splitter and route them to any of your TVs throughout your house. This allows you to watch TV on any of the TVs in your home.
Most commercially available antennas come in length equivalent from 1/4 to 5/8's of a full wavelength. This means that if you want to run a 2m rig (144'ish Mhz),a half wavelength antenna would be 3.3” long, and 3.3 ft is very manageable for vehiclular operations.
A good rule of thumb is that a short-range antenna is probably fine if the tower transmitting the signal is less than 40 miles away. However, if the signal is weak, getting a long-range antenna can help you pick it up clearly. You can check signal report sites to determine what kind of signal to expect.
NMEA recommends 6 feet of vertical and horizontal separation between the VHF and AIS antennas. Most manufacturers recommend more.
To measure the isolation between two antennas, two-port network S-parameters can be used. The S-parameters S21 and S12 describe the effect on port 2 due to port 1 and vice versa. These parameters determine the insertion loss and isolation between antennas.
Some people think that a higher gain antenna will give them the strongest signal and highest quality connection. This is true in some cases, but in certain applications too much gain can be a bad thing. The truth is, the answer to whether you need a higher or a lower gain antenna lies in your application.
The larger the surface area of the antenna, the more channels it's likely to receive. Because outdoor antennas are up high, they are more likely to get long-distance signals. Outdoor antennas receive broadcasts with less interference, as well.
The antenna needs to be placed in the same position as the TV transmitter. Because most of the TV transmitter are horizontal polarized it would be best to start putting the antenna in a horizontal position. One For All antennas receive vertical as well as horizontal signals.
These considerations include system requirements, antenna selection, antenna placement, antenna element design/simulation and antenna measurements.
As a rule, it's best to place your antenna where the entire height of the mast can 'see' in all directions – on the roof, or on the roof racks. Use a quality, hinged mount and remember that an antenna works best when installed vertically.
You're usually best off placing the antenna on a wall that runs at or close to a 90-degree angle to the direction of the signal.
If hills, trees, buildings, or other geographic features are in between the broadcast towers and the antenna, the signals might not be able to reach your antenna. Elevating the antenna, either by placing it in a higher location or using a taller mast, will increase the signal reception.
Structures such as floors, cabinets, and walls can impact signal, so placing your antenna high in a window is ideal, as long as it's free from exterior obstructions (trees, buildings, billboards, etc.).