How to choose the antenna correctly

By sdga:NiceRF Wireless Technology Co., Ltd

In the field of communication technology, antennas play an important role. Regardless of whether it is a transmitter or a receiver, an antenna is required. A suitable antenna can optimize the network and increase the communication range and reliability. An inappropriate antenna will cause the communication quality to decrease. Since the antenna is so important, this article will introduce what an antenna is, the principle of the antenna and how to choose the antenna correctly.


What is an antenna

An antenna is a device that converts an electric field into electromagnetic waves.


Principle of antenna

The antenna converts the electric field into a magnetic field to form an electromagnetic wave to transmit the signal, and in the reverse direction, it converts the magnetic field into an electric field and then transmits it to the device through the line, thereby forming the transmission and reception of wireless signals.


Teach you the correct choice of antenna

We have said before that a suitable antenna can improve the communication quality and expand the communication range, otherwise it will reduce the communication quality. So how should we choose the correct antenna? You can start with the antenna parameters: frequency, matching impedance, voltage standing wave ratio, gain and polarization. For wireless communication products (such as: wireless data transmission module), the common antenna operating frequency and gain in the specifications.

1. Working frequency

The antenna is used to transmit and receive electromagnetic waves, just like a converter, which converts the current into electromagnetic waves, and then the electromagnetic waves back to current. The last important parameter is the operating frequency. For example, a 2.4GHz antenna is used for communication with devices working in the 5G frequency band, which may result in a very poor signal or a decrease in the transmission rate.

2. Gain

Antenna gain represents the degree of energy concentration and conversion efficiency of the antenna to the signal. Increasing the gain of wireless communication is not amplifying the signal, but gathering the energy of the signal. Gain can affect the direction of antenna operation. Generally speaking, the higher the gain, the stronger the directionality of the antenna, and vice versa, the more uniform the radiation distribution in all directions.


Type of antenna

Spring antenna, rod antenna, sucker antenna, Yagi antenna, plate antenna, indoor ceiling antenna.

The antenna is an important part of the communication system. Only a good quality and suitable antenna can improve the communication quality and expand the communication range. Common communication antennas include spring antennas, rod antennas and sucker antennas. If you have already purchased our wireless module, in order to make the module in the best working condition, it is recommended to use the antenna provided by Shenzhen NiceRF Wireless Technology Co., Ltd.


Articles you may be interested in:

Connection method of wireless transceiver module and communication antenna

The relationship between antenna length, frequency and wavelength

How to use the antenna correctly

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