The customer requires connectivity between two buildings that are 100 meters apart. Which type of antenna is suitable for this installation?
A. sector antenna
B. dipole antenna
C. parabolic antenna
D. patch antenna
Which type of antenna is suitable for this installation?
The question is 100 meter, which is 328 feet. The excerpt above says patch antenna supports “several hundred feet”, which seems to be a stretch. Parabolic dish antenna can support “up to 25 miles”, i.e. it should support 328 feet as well. So I still think C is correct.
I think D as well:
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/product_data_sheet09186a008008883b.html
● Point-to-point: When connecting two points together (such as a wireless bridge), the distance, obstructions, and antenna location must be considered. If the antennas can be mounted indoors and the distance is very short (several hundred feet), the standard dipole or mast mount 5.2 dBi omnidirectional may be used. An alternative is to use two patch antennas. For very long distances (1/2 mi. or more), directional high-gain antennas must be used. These antennas should be installed as high as possible, and above obstructions such as trees, buildings, and so on; and if directional antennas are used, they must be aligned so that their main radiated power lobes are directed at each other. With a line-of-site configuration, distances of up to 25 miles at 2.4 GHz and 12 miles at 5 GHz can be reached using parabolic dish antennas, if a clear line-of-site is maintained. With the use of directional antennas, fewer interference possibilities exist and there is less possibility of causing interference to anyone else.
Answer should be D.
Cause the question is “100m apart”. Answer C was over limit.