Introduction
Radio Transmission Paths

Electromagnetic waves, which can be effectively propagated on specific frequencies through free space, are used for implementation of radio transmission. A suitable group of electromagnetic waves is called as radio waves. Radio waves can be divided on the basis of their usage into these several categories (see the following list and figure):

- Radio Band (carriers from hundreds of kHz up to tens of MHz) – LW (Long Waves), MW (Medium Waves), SW (Short Waves) and VHF (Very High Frequencies)
- TV Band (carriers from tens up to hundreds of MHz)
- Mobile Networks and Microwave Band (carriers in order of ones of GHz)
- Satellite Links, Radio Relay Links and Broadband Wireless Access Networks (carriers up to tens of GHz)

Frequency bands utilized by radio systems

Radio systems may either complement the fixed or wired access resources, especially wherever it is convenient, or you can use them to create a distinct mobile and fixed network providing a wide portfolio of services.

The most economical benefit of radio systems is especially achieved in “hard to reach” areas and locations with sparse population where it is not cost-effective or suitable to build a cable network. The wireless network offers high flexibility, which can be temporarily used in case when the customer requires the connectivity to the network infrastructure immediately (for example concerts, meetings, etc.).