The receiver multicoupler is a crucial part of a telecommunication system. This antenna subsystem component enables the functioning of two or more receivers that are linked to a single receive antenna. The signal quality received by the receiver is equivalent to or better than that received by a separate antenna for each receiver. Increased capacity can be accomplished without adding more antennas to the tower by optimizing the effective usage of the tower-mounted receive antenna over a large number of base stations. When it comes to wind loading on towers, the number and kind of antennas that may be installed on a tower in a particular geographic location will be limited.
So What Is A Receiver Multicoupler?
A Receiver Multicoupler is a device that allows numerous radio receivers to be connected to a single antenna. It divides a single input signal received from the antenna into many signals with excellent port-to-port isolation by splitting the signal received from the antenna into numerous signals. A typical multicoupler is comprised of these key operating components:
- A power divider
- Band pass filters
- A Low Noise Amplifier
Receiver multicouplers are intended to save critical antenna mounting structure space while also lowering the cost of system installation and maintenance by enabling between 2 and 32 channels to be coupled to a single antenna. It also enables the selection of the optimal antenna position for usage by all multicoupled frequencies to deliver the most comprehensive coverage solution. The range of frequencies covered is from 138 to 960 MHz. The power supply, preselector, attenuation, fail-over, and warning functions are just a few of the features that are offered on these devices.
Types of Receiver Multicoupler
There are two types:
Active Multicouplers: To mitigate any signal losses that occur after filtration and splitting, active multicouplers employ a low-noise amplifier (LNA) at the component’s input.
Passive Multicouplers: It is always possible for passive multicouplers to experience losses dependent on the insertion loss of the filter and power divider utilized.
Applications of A Receiver Multicoupler
A well-designed multicoupler system has a number of advantages. The right preselector can give the best possible signal filtering. It is possible to give a lower noise figure for all receivers in the system. Amplification allows a large dynamic range to be achieved. Site analysis and design will also enable for more effective placement of both receive and transmit antennas if done properly. If done correctly, connecting two or more receivers into a single antenna should result in performance that is equal to or better than having a specialized antenna for each receiver.
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Multicouplers are available from a number of different manufacturers for practically every land mobile frequency. Multicoupling can range from as little as two channels from a single antenna to as many as 192 channels from several antennas, depending on the application. Manufacturers provide the most popular systems with a geometrically increasing number of potential receiver outputs: two, four, eight, sixteen, thirty-two, and sixty-four. Custom configurations, such as 12 ports, are also available. Some systems are extendable, allowing for further branching into more receivers; others, however, are not so flexible.
Depending on the application, receiver multicoupler systems can be rack-mounted in the apparatus bunker or installed on a towertop near to the antenna, which has several advantages. In both circumstances, the system’s major parts are the same: an antenna linked to the input of a preselector through a transmission line, the output of which is supplied into an amplifier with an accompanying power source. Moreover, the output from the amplifier is sent through a series of one or more signal power dividers that terminate in two or more receiver feed ports before being fed into the receivers. Most of the intermediate equipment is located within a single chassis. The antenna and receiver are the two terminals that must be addressed initially to properly function.
Despite the fact that the antenna is supported by, and technically not a part of, the multicoupler system, it must be taken into consideration before proceeding. In order to maximize efficiency, the receive antenna should be placed in the best possible location. It is necessary for the antennas that feed multicouplers to have a suitable bandwidth for the frequency range that is being used. Because if the antenna is not fit for the purpose, the entire chain of technology that follows it is a waste of time. In order to avoid amplifier overload and the coupling of wideband transmitter noise into the multicoupler passband region, receive antennas should be placed at a sufficient distance from all transmit antennas. There should be at least 30dB of isolation and preferably 60dB of isolation between the receive antenna and any send antennas used.
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Receiver multicouplers can be used for a variety of signal monitoring applications, ranging from VHF/UHF scanner radios used to monitor government agencies to high-frequency receivers used to monitor shortwave broadcasts or utility stations, among other applications. It is possible to implement a monitoring system utilizing multicouplers at various frequencies, ranging from high frequency to VHF/UHF, at various levels of difficulty, ranging from that of a serious hobbyist to that of a surveillance professional engaged in the business of signals intercept and communications monitoring. Using receiver multicouplers has a number of advantages, the most obvious of which is the fact that only one antenna system is required to feed a number of receivers. The inherent technical configuration of the monitoring system is further reduced in that only one feed-line is required, and if a pre-amplifier or a lightning protection device is utilized, only one of these devices is required to feed banks of monitoring receivers, further simplifying the technical arrangement.
Most receiver multicoupler requirements are unique to the client and are designed by the companies in response to the client’s needs. Please get in touch with Tron Elektronik if you want to learn more about receiver multicouplers.