无线电波、微波和红外线的区别

1. 无线电波传输：
无线电波的频率范围从 3 KHz 到 1 GHz。这些波很容易产生，并且可以长距离传播。这些波本质上是全向的，这意味着它们可以向所有方向传播。它们被广泛用于室内和室外之间的通信，因为它们具有非常容易穿透墙壁的特性。这些波通常用于 AM 和 FM 收音机、电视、手机和无线 LAN。

图：无线电波传输

2. 微波传输：
微波是频率范围在 1 GHz 至 300 GHz 之间的电磁波。这些可以长距离传播。它们本质上是单向的，这意味着它们只能直线行驶。在无法穿透墙壁的非常高的频率下。这些波通常用于发送方和接收方、蜂窝电话、卫星网络和无线局域网之间的一对一通信。

图：微波传输

3. 红外线：
红外线是频率范围在 300 GHz 至 400 GHz 之间的电磁波。这些不能长距离旅行。这些波用于短距离通信，它们也使用传播的视线。这些波不能穿过墙壁等固体物体。这些也不能穿透墙壁。 IR 波最常见的应用是用于电视、DVD 播放器和立体声系统的遥控器。

图：红外传输

无线电波、微波和红外线的区别：

Sr. No.	Basis	Radiowave	Microwave	Infrared wave
1.	Direction	These are omni-directional in nature.	These are unidirectional in nature.	These are unidirectional in nature.
2.	Penetration	At low frequency, they can penetrate through solid objects and walls but high frequency they bounce off the obstacle.	At low frequency, they can penetrate through solid objects and walls. at high frequency, they cannot penetrate.	They cannot penetrate through any solid object and walls.
3.	Frequency range	Frequency range: 3 KHz to 1GHz.	Frequency range: 1 GHz to 300 GHz.	Frequency range: 300 GHz to 400 GHz.
4.	Security	These offers poor security.	These offers medium security.	These offers high security.
5.	Attenuation	Attenuation is high.	Attenuation is variable.	Attenuation is low.
6.	Government Licence	Some frequencies in the radiowaves require government license to use these.	Some frequencies in the microwaves require government license to use these.	There is no need of government license to use these waves.
7.	Usage Cost	Setup and usage Cost is moderate.	Setup and usage Cost is high.	Usage Cost is very less.
8.	Communication	These are used in long distance communication.	These are used in long distance communication.	These are not used in long distance communication.