1/4 wave GP1 antenna with 15 meters cable Connector BNC，TNC，NJ for 5w 7w 15w 25w 50w fm transmitter | Электроника

1/4 wave GP1 antenna with 15 meters cable Connector BNC，TNC，NJ for 5w 7w 15w 25w 50w fm transmitter | Электроника

Optional line interface: BNC connector, TNC connector, NJ connector.

GP1 type 1/4 wavelength GP umbrella antenna

parameter:
Working frequency: 87-108MHz (divided into five sections)
(90MHz) (94MHz) (98MHz) (102MHz) (106MHz)
Maximum power: 15W
Radiation angle: the vertical radiation angle is 45°
Gain: omnidirectional 3db
Impedance: 50 ohms
Frequency: 90MHz by default
Bandwidth: greater than 5MHz within 1.5 of the standing wave
Standing wave at center point: less than 1.1
Line interface: BNC/NJ/TNC connector
Net weight: 1KG
Feeder: 15m high quality feeder

Factors affecting the launch distance:

*The size of the transmitter power
The greater the power of the transmitter, the longer the transmission distance

*The height of the antenna
Electromagnetic waves in the FM band propagate approximately in a straight line, with characteristics similar to those of light propagation. During the propagation process, the propagation distance will be greatly shortened when obstacles are encountered. Therefore, the higher the antenna is set up, the fewer obstacles encountered in signal propagation and the farther the propagation distance.

*Antenna gain
Antenna gain refers to the multiple that the antenna can amplify the signal. The greater the gain, the stronger the signal and the longer the distance.

*The working environment of the transmitter
As mentioned earlier, the electromagnetic wave propagation characteristics of the FM band are similar to light. Therefore, if there is a high building blocking the transmitting antenna and the receiving antenna, the transmission distance will be greatly reduced.

*Receiver sensitivity
If the receiver's sensitivity is very low, no matter how strong the transmitter power is, it won't help.

*Electromagnetic environment
If the electromagnetic environment is bad, of course it will cause interference to the receiver, and the receiving ability will definitely be affected. Just like two people chatting in DISCO, it is quite strenuous.

In summary, there is no transmission distance indicator in the hard indicators of general transmitters. It is unrealistic to talk about the transmission distance without using the environment.