In modern communication networks, distributed antenna systems (DAS) have become an important means for operators to address indoor coverage, capacity enhancement, and multi band signal transmission. The performance of DAS depends not only on the antenna itself, but also on various passive components in the system, especially power splitters and directional couplers. How to choose suitable devices directly determines the signal coverage quality and overall network operation efficiency.
1.The main function of a power divider in a DAS system is to evenly distribute base station signals to multiple indoor antenna ports, achieving multi area coverage.
The key point when choosing a power divider is that the lower the insertion loss, the higher the signal transmission efficiency. Operators usually choose low loss power dividers in large-scale indoor coverage projects to reduce power waste.
High port isolation can reduce crosstalk between ports and ensure signal independence between different antennas.
In high-power application scenarios (such as large venue DAS systems), it is necessary to choose a power divider that can withstand higher input power to ensure long-term stable operation.
2. The application of couplers in DAS systems. The role of couplers is to extract a portion of the power from the backbone signal, which is used to feed the antenna in a certain area indoors. They are commonly used in scenarios such as corridors and floor assignments.
Key points when choosing a coupler: Coupling Value. Common coupling values include 6 dB, 10 dB, 15 dB, etc. Different coupling values can affect the power allocated to the antenna. Operators should make reasonable choices based on coverage range and number of antennas.
Directional couplers with high directionality and isolation can reduce signal reflection and improve the stability of the backbone link.
Low PIM characteristics are particularly important in 5G and multi band DAS systems, where low PIM couplers can effectively avoid intermodulation interference and ensure signal quality.
3. The actual selection strategy of operators in engineering deployment usually involves a comprehensive selection of power dividers and couplers based on the following factors:
Coverage scenario scale: Small office buildings can use 2-point and 3-point power dividers; Large sports venues or airports require a combination of multi-stage power dividers and multiple couplers.
Multi band support: Modern DAS needs to support both 698-2700MHz and even extend to 3800MHz, and operators need to choose passive components that are compatible with all frequency bands.
System balance: By reasonably matching power dividers and couplers, the signal strength in each area is balanced to avoid blind spots or excessive coverage.
4. Kingtone's advantages
As a professional manufacturer of RF passive components, our company provides a full range of low insertion loss power dividers and low PIM couplers, covering the 698-3800MHz frequency band and widely used in operator DAS projects
☆ Low PIM design (≤ -161 dBc) to ensure 5G signal quality;
☆ Multiple port options (2/3/4 power divider), flexible adaptation to different coverage scenarios;
☆ Full frequency support, meeting the multi frequency co station requirements of LTE and 5G;
☆ IP67 protection level ensures long-term stable operation in complex environments.
For more details, you can contact kingtone team for support.
info@kingtone.cc
