-
RF Passive Component:RF Directional Coupler
May , 15 2020
rf directional coupler is the important part in rf passive component filed.It's a electronic item that couple a defined amount of the electromagnetic power in a transmission line to a port enabling the signal to be used in another circuit. One key feature of directional couplers is that they only couple power flowing in one direction. In this way, power entering the output port is coupled to the i...
View more
-
3dB Hybrid Coupler
Aug , 07 2020
The 3dB Hybrid Coupler is also called the same frequency combiner. It can continuously sample the transmission power along a certain direction of the transmission line, and can divide an input signal into two signals of equal amplitude and 90° phase difference. It is mainly used for multi-signal combining to improve the utilization of output signals. It is widely used to combine base station signa...
View more
-
Cellular Distributed Antenna Systems (DAS)
Sep , 17 2020
How A DAS Works A DAS is a network of antennas that sends and receives cellular signals on a carrier’s licensed frequencies, thereby improving voice and data connectivity for end users. In its most simplified form, a DAS has two basic components: 1 - A signal source A Distributed Antenna System, as the name implies, “distributes” signal. But it generally doesn’t generate the cellular signal itself...
View more
-
How to Grasp Chances to facilitate 5G fast network construction?
Oct , 08 2020
With the rapid development of 5G, the communication industry will usher in a major opportunity for development. Because the existing stock of traditional DAS system in 5G era cannot support functions such as 3.5GHz high-frequency and xTxR MIMO, etc., the evolution to 5G has encountered a development bottleneck. 5G will address the challenge of providing continuous network coverage for a large numb...
View more
-
What is active DAS?
Nov , 07 2020
Active DAS An active DAS converts the analog radio frequency transmissions from the signal source to a digital signal for distribution. A master unit performs this analog-to- digital conversion. The master unit may digitize the signal from a single carrier or multiple carriers. Once converted, the DAS transmits the digital signal over fiber optic or Ethernet cables to remote radio units (RRUs) tha...
View more
-
Low PIM 5G RF Directional Coupler
Nov , 13 2020
1.2 Appearance of accessories Low PIM 5G RF Directional Coupler Figure 2 The coupler is distributed in the indoor system 1.4 Main application of directional coupler 1. Signal injection 2. Adjustment of signal generator; 3. Monitoring of power flow; 4. Measure incident power and reflected power to determine standing wave ratio; 5. Signal sampling; directional coupler (derives the downlink sign...
View more
-
What is Hybrid DAS?
Dec , 12 2020
A hybrid DAS A hybrid DAS combines characteristics of passive parts(including RF antenna, directional coupler, power divider,hybrid coupler)and active systems. The RRUs are separate from the antennas, allowing the system to use both fiber optic cable a configuration includes an RRU on each floor that converts from the digital signal to analog RF. The analog RF signal is then connected to multiple ...
View more
-
Coverage vs Capacity
Jan , 23 2021
Coverage vs Capacity To be able to compare the different technologies, we need to review the two main performance reasons that DAS solutions are deployed: to provide coverage and capacity. Some locations experience significantly more cellular data usage than others. Think of a sports stadium hosting the Super Bowl, or a large music venue hosting Justin Timberlake. If the venue relied on a ne...
View more
