4g cell phone jammer The use of multiple antennas wireless router / AP, or for them to replace the high-gain external antenna, which can really enhance the stability and transmission capabilities of the wireless signal of the wireless network, to a certain extent, it can really alleviate the problem of radio interference but away from the radio interference problem solving very much worse.
In particular, the antenna gain is the use of radio signals to mitigate interference problems, more likely to cause instability of the wireless network. Because of the high gain antenna to the radiation on more concentrated in certain directions, will reduce the angle of the wireless signal transmission, that the wireless network coverage angle becomes smaller, then the wireless client if the case is displaced, moved out of the gain strengthening of the antenna coverage angle, then the time of the wireless network will become more unstable. 4g cell phone jammer
Summary: Using the high-gain antenna or wireless signal interference problem can be mitigated, but not solved the problem of wireless signal interference. Therefore, the gain of the antenna can solve radio interference This argument also be rejected. 4g cell phone jammer
British scientists Maxwell theory of the early 19th century through the study, predicted the existence of electromagnetic waves. 1887, French scientist Hertz experimentally confirmed the existence of electromagnetic waves. In 1895, Italian scientists Makeni spark discharge generated using electromagnetic waves to transmit Morse code to hundreds of meters away, announced the birth of radio communications.
How propagation of radio waves 4g cell phone jammer
Radio wave propagation in space, depending on the frequency or wavelength have different propagation characteristics. Longwave mainly spread along the surface of the earth, also known as ground wave, its propagation distance of up to thousands or even tens of thousands of kilometers, can penetrate the water and soil, and more for the sea, underwater communication and navigation ground. Mainly by ground wave propagation in the daytime, nighttime ionospheric reflection can also be spread mainly used for broadcasting and navigation. Shortwave mainly by ionospheric reflection of sky-wave propagation, via one or several ionospheric reflection, communication distance of up to several thousand kilometers or even thousands of miles for emergency response, disaster communications and remote transoceanic communications. Mainly straight line of sight microwave transmission, terrestrial propagation distance of only a few dozen kilometers, but the spread of up to tens of thousands of air miles, mainly for the trunk or branch of wireless communications, satellite communications. 4g cell phone jammer
How many radio services in our Table of Frequency Allocations
According to the definition and classification of the National Union "radio planning" within radio services using radio waves can be divided into two categories: radio communication services and radio astronomy service. Radiocommunication particular telecommunication service provider uses a variety of radio wave transmission, emission, and (or) received. Radio astronomy service is receiving cosmic radio waves, based on a business involving the use of radio astronomy. In the current "radio planning", the radio communication services can be divided into fixed-satellite service, satellite broadcasting services and other 37 kinds of business.
Frequency of use should pay attention to what 4g cell phone jammer
Frequency of use should note the following:
(a) must comply with the relevant national frequency management in strict accordance with the specified frequency, are not allowed to change, for the adjustable frequency devices, subject to frequency-locked before use.
(2) strict accordance with the approval of Taiwan (net) when approved by the station site, antenna height, antenna gain, transmitter output power and other parameters of the work stations, shall send and receive work-related signals. Frequency Accuracy
(3) maintain the equipment, stability, band width, residual wave radiation and other technical indicators meet the technical standards prescribed by the State, and regular maintenance equipment to ensure Taiwan (net) of normal operation.
(4) fails to pay frequency occupation fee. 4g cell phone jammer
(5) Under certain conditions, the user may apply for adjustment and to increase the frequency: the frequency of the current received interference insurmountable; traffic increases, without increasing the frequency can not complete the task; prior to contact each other in order to achieve the frequency of each of the communication between objects .
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