Are you a factory or a trade company？
- We are factory specialised in all kinds of Antennas.
Where are you located？
- We are in Hefei city, near Shanghai.
How many years have you engaged in this business?
- We have engaged in this business more than 10 years, and we are professional in all kinds of Antennas.
How long is your delivery time(lead time)?
- Within 5 days if the product is in stock, otherwise will take about 10-20days, after receiving the deposit.
What's the MOQ (Minimum Order Quantity)?
- Generally speaking 10pcs, but it depends on models.
How many workers do you have?
- More Than 150.
It is all right to add our logo on your products?
- Yes, we can do printing logo.
Why choose us?
- As a professional supplier for all kinds of antennas more than 10 years, we win our clients with good quality and competitive price. QC inspection before shipping, strong quality control process.
About Antenna Gain
- I. Definition of antenna gain:
The ratio of the radiated power flux density of an antenna in a specified direction to the maximum radiated power flux density of a reference antenna at the same input power.
→ Note the following points:
If not specifically labeled, the antenna gain refers to the gain in the direction of maximum radiation;
(2) Under the same conditions, the higher the gain, the better the directionality, the farther the wave propagates, i.e. the distance covered increases. But the width of the wave speed will be compressed, the narrower the wave flap, which leads to the uniformity of the coverage becomes worse.
gain and transmit power
Radio transmitter output RF signals, through the feeder (cable) to the antenna, the antenna in the form of electromagnetic waves radiated out. Electromagnetic waves arrive at the receiving site, received by the antenna (only receive a very small part of the power), and through the feeder to the radio receiver. Therefore, in the engineering of wireless networks, it is very important to calculate the transmitting power of the transmitter and the radiation capacity of the antenna.
2.The transmitted power of a radio wave is the amount of energy in a given frequency band range and is usually measured or measured in two ways:
Power (W): a linear level relative to 1 watt (Watts).
Gain (dBm): a proportional level relative to 1 milliwatt (Milliwatt).
→ The two expressions are interchangeable:
dBm = 10 x log[power mW]
mW = 10^[gain dBm / 10 dBm]
In a wireless system, an antenna is used to convert current waves into electromagnetic waves, and in the process of conversion, it can also "amplify" the transmitted and received signals, and the measure of this energy amplification becomes "Gain". The unit of measurement for antenna gain is "dBi".
The antenna is a passive device, can not generate energy. Antenna gain is only the ability to effectively focus the energy to a particular direction to radiate or receive electromagnetic waves.
