China Wireless modem Manufacturers, Serial server Factory https://blog.dnevnik.hr/zigbeemodule
srijeda, 06.04.2022.
Why is it said that the wireless data transmission station and the gain antenna are complementary to each other?
Recently, our company's digital radio customers encountered the problem of module mismatch antenna in the process of using ultra-wideband (410-493MHz) 25W digital radio and 433MHz antenna. Let's talk about this topic again.
Why do digital radio and antennas complement each other?
Question: When the customer uses this digital radio, Test kits Whosalers some antennas cannot work normally, the module alarms and protects itself, but most of the antennas can work normally. What is the reason?
Analytical solution
We know that if the bandwidth of the antenna is narrow and the frequency is far away from the center frequency, the standing wave (VSWR) will be too high, which will cause the impedance between the radio and the antenna to be unmatched, and most of the energy emitted by the radio cannot be transmitted to The antenna radiates into free space, and the energy that cannot be transmitted is completely returned to the radio. If it exceeds the capacity of the radio, it will cause the module to heat up seriously, or even directly burn the radio.
Why do digital radio and antennas complement each other?
As shown in the figure above, a 230MHz standard antenna has a bandwidth of only 10MHz. When the frequency is away from the center point, there will be a higher VSWR value.
Therefore, generally high-power radios are equipped with antenna detection protection. If the antenna standing wave is detected to be too high, the module will directly enter the protection mode to protect the radio and system safety.
For some low-power modules, although there is no such protection, the mismatch between the module and the antenna will greatly reduce the communication quality, thus failing to meet the system requirements and wasting a lot of resources. For applications, 5dBm transmit power is sufficient. Yes, but many application scenarios do not pay attention to antenna selection, and directly choose modules with higher power, or even increase to the unit of watt (W) to select models, so the power consumption remains high, complaining that the battery can't stand it, and at the same time Product costs have also skyrocketed.
In fact, after the radio, module and antenna are matched, China Lora module Test kitsmost of the above problems will be solved.
Why do digital radio and antennas complement each other? "94F17919-FD09-4709-B6DE-414D6D6892F4"
We cooperate with Ebyte to provide overall communication solutions. Starting from the solution, we can package and solve communication problems for customers. At the same time, we also provide customized antenna projects to solve various problems encountered in communication systems for customers.
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