380-3800MHz Indoor OMNI Ceiling Antenna (BRA380-3800V05A360A)
Engineered for seamless integration into passive Distributed Antenna Systems (DAS), the BRA380-3800V05A360A is a premium indoor ceiling-mount omnidirectional dome antenna. Manufactured by Hefei Bri Electronic & Technology Co.,Ltd, this high-performance siso ceiling antenna delivers a true 360-degree horizontal beam width for vast indoor coverage.
Providing highly stable operation across the 380-520 MHz, 698-960 MHz, 1710-2700 MHz, and 3300-3800 MHz frequency bands, it serves as an exceptional tetra radio antenna for public safety and standard cellular distribution. The unit guarantees strict signal integrity with a low passive intermodulation (IM3) rating of ≤-153dBc@2*43dBm and utilizes a vertically polarized transmission approach to maximize connection reliability with mobile user equipment.
Technical Specifications
| Specification | Details |
| Model | BRA380-3800V05A360A |
| Frequency Range (MHz) | 380-520 / 698-960 / 1710-2700 / 3300-3800 |
| Polarization | Vertical |
| Gain (dBi) | 2.0±1.0 / 2.5±1.0 / 5.0±1.0 / 5.0±1.0 |
| VSWR | ≤2.0 |
| Intermodulation IM3 | ≤-153dBc@2*43dBm |
| Impedance | 50 Ω |
| Maximum Input Power | 50 W |
| Connector Type | 4.310/-Female (with cable) |
| Dimensions | φ298*152 mm |
| Operating Temperature | -55~60 °C |
Technical Guide: Antenna Design and RF Polarization
Understanding Ceiling Antennas vs. Panel Antennas
When designing an In-Building System (IBS), choosing between antenna form factors is critical. A ceiling antenna—such as this siso ceiling antenna—is mounted overhead and radiates RF energy downward in a 360-degree, omnidirectional pattern. It is ideal for open floor plans or central room placements to provide a broad umbrella of coverage. Conversely, a directional panel antenna is typically wall-mounted and focuses the RF signal tightly in one direction (e.g., down a long corridor), offering higher gain over a narrower, targeted sector.
The Difference and Advantage of Two Polarization Antennas
Radio frequency polarization dictates the orientation of the transmitted waves.
Vertical vs. Horizontal: A vertically polarized antenna (like the BRA380) aligns its signal perpendicular to the floor, which is the exact orientation of most smartphones held by users, ensuring a naturally strong connection. Horizontal polarization (like the BRTX) pushes waves parallel to the floor, which can navigate uniquely around certain indoor obstacles.
The Dual Advantage: Upgrading a network with a dual polarized ceiling antenna combines both horizontal and vertical streams simultaneously. This drastically reduces signal fading and multi-path interference, doubling the data capability and ensuring user devices latch onto the strongest possible signal regardless of how the device is held or rotated.
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