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Sventenna LAS-UHF

The LAS-UHF Antenna System is designed as an all-in-one solution that, thanks to its versatility, supports virtually any operational mode.  

The system consists of two LPDA (Log Periodic Dipole Arrays) that, depending on the configuration, can fulfill various roles within a wireless audio ecosystem. 

The following modes of use: 

 1. Stand-Alone Operation & Spatial Diversity Basically, each antenna can be used independently for both transmitting and receiving signals via the standard BNC connector. Spatial Diversity: When both antennas are placed separately in the space and connected to the A and B inputs of a diversity receiver, a spatial diversity scheme is created. This helps minimize signal dropouts caused by reflections or obstructions. 

2. Polarization Diversity. A unique feature of the LAS-UHF system is that the two LPDA antennas can be clicked together orthogonally (at right angles). This allows both antennas to be mounted on a single microphone stand. Both BNC outputs are then connected to the receiver, allowing the system to receive signals from different polarization planes (horizontal and vertical) simultaneously. This is particularly useful in environments where the transmitter (such as a handheld microphone) constantly changes angle. 

 3. Circular Polarization. By using the antennas in the locked position and making specific adjustments to the internal wiring, the system can function as a single circularly polarized antenna. Configuration: Users must move two MCX jumpers from the “Storage” ports to the “Input” ports on both the vertical and horizontal antennas. 

Result: The system generates an LHCP/LHEP (Left-Hand Circular/Elliptical Polarization) signal. This mode is ideal for reducing interference and improving signal stability in challenging RF environments. 

The broader context of the system: The LAS-UHF system is designed not only for technical flexibility, but also for practical convenience and durability: 

Compactness: The entire system is compact enough to fit into a 1U rack drawer, which significantly simplifies transport. 

Physical properties: The antennas are water-resistant (provided unused connectors are covered) and can survive a drop from a standard microphone stand (approx. 2 meters). Specifications: The system operates within a bandwidth of 470–694 MHz and offers an average gain of approximately 5 to 5.3 dBi, depending on the selected mode. 

 You can think of the LAS-UHF system as a set of modular building blocks: depending on how you snap them together and connect them, they transform from two simple building blocks (stand-alone) into a complex machine capable of receiving signals from every angle (circular), without requiring you to purchase an entirely new device for each new task.

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