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What is the Role of the Antenna on the Bluetooth Module?
What is the Role of the Antenna on the Bluetooth Module?
Professional 5G 4G LTE 3G GSM GPRS Cellular Antenna, WIFI Antenna And GNSS Antenna Solution Provider

What is the Role of the Antenna on the Bluetooth Module?

1. Overview of Bluetooth module antenna


When it comes to Bluetooth modules, there is one thing I have to mention, and that is the antenna. What is the antenna? An antenna is a component used to transmit or receive electromagnetic waves. The function of the transmitting antenna is to effectively convert the high-frequency current energy of the transmitter into electromagnetic energy in space; while the function of the receiving antenna is just the opposite, so the antenna is essentially an energy converter.


The Bluetooth module can successfully complete short-distance data transmission regardless of the location or direction of use, but a proper Bluetooth antenna design will help achieve better transmission quality. For example, let's compare two common antennas for Bluetooth modules on the market: IPEX interface external antenna and PCB onboard antenna.


2. Comparison of Bluetooth module antennas


The IPEX interface is connected to an external antenna. Its characteristics are: the signal has good directivity, high efficiency, strong anti-interference ability, can be far away from the interference on the motherboard, and does not need to be debugged too much; as a terminal manufacturer, it only needs to connect one external IPEX antenna; of course, there are disadvantages: high cost and troublesome assembly.


The PCB on-board antenna, as a Bluetooth antenna, refers to the part on the PCB for wireless reception and transmission. When transmitting, it converts the high-frequency current of the transmitter into space electromagnetic waves; when receiving, it converts the electromagnetic waves intercepted from space into high-frequency currents and sends them to the receiver. Its characteristics are: less space occupation, low cost, no need of assembling the antenna separately, not likely to get damaged, and easy assembly of the whole machine.

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