Have you got trouble finding test equipment to operate correctly? Have you got uncommon difficulties with power supply regulators? Are you experiencing unwanted music superimposed on your signs? Have you got a high rate of unexplainable hand-offs, dropped calls and other items occurring from the particular mobile website?The phenomena defined over are but a several outward indications of unwanted RF indicate ingress in to mobile telephone systems. These typically arise at mobile or changing internet sites near broadcast and other large power RF installations, actually many miles away.As mobile operators expand their systems in MSA’s and build new programs in RSA’s, they’re obtaining increasing difficulty in obtaining power to build new systems wherever needed. Usually the only method to locate a mobile website in a specific region is to generally share an existing tower which is previously being employed by one or more different transmitters. As an alternative, the mobile user may be needed to discover a new system in a current antenna “farm “. empresa de blindagem
Either way there is a definite chance that high RF indicate degrees is going to be present in the quick vicinity of the cellular equipment. In certain places, normal field depth levels may even exceed OSHA restricts and pose workers hazards!What is the clear answer to these issues? The solution is essentially to “enclose” the cellular gear in a “box” which prevents all RF signals, keeping all other signs out from the “box” and limiting the mobile signals inside the “box “.
As a practical matter, a perfect protecting “field” is neither achievable nor economically desirable. There must often be penetrations of the shield for antenna sign lines, principal power, telephone lines, opportunities, grounding cords, air conditioners, water and sewer pipes, etc. The secret is to limit passing through these penetrations to ensure that undesirable RF signals which enter the guarded area are sufficiently small to cause no injury to practical gear installations.
In the real world, most protecting wants could be met by progressive programs of advanced architectural shielding materials. Using specific things like fiber attenuation composites, covering suspensions, and more conventional practices, attenuations of 40 dB or maybe more can quickly be obtained in existing buildings. Without to “CIA” specifications, such attenuations may usually be sufficient to make sure no ingress into your equipment.In addition to guarding your investment in high priced equipment, reducing maintenance prices, and raising consistency and customer care, architectural protecting can protect your employees from perhaps harmful experience of large RF indicate levels, and may just produce the huge difference in the viability of a mobile site.
Control of RF ingress issues starts with site selection. A cautious study, including area intensity proportions wherever required, should be manufactured to identify current and potential hazards. This is often tricky, since the “world” of large energy RF is usually not familiar to website purchase people, or even to area cellular engineers. Actually the acquisition of meaningful FCC data might be difficult.
Real abatement proceeds from 1 ) avoidance or 2) correct style based upon information taken in the site selection process. Needless to say, at current sites, diagnostic dimensions is employed, along with a database examine to characterize the specific and potential environment. Using this information, protecting techniques are picked and, with the architectural or developing designer, integrated into construction planning. In many cases, it could be necessary to change common electronics designs to make sure that not merely the current installations, but potential expansion can remain RF-free.