Stable radio communication is critically important for coordinating units in combat conditions. Even a modern military radio is not able to ensure reliable signal transmission without a correctly selected antenna. It is precisely the antenna for a radio that is responsible for the effective radiation and reception of radio waves, and the range and stability of communication depend on this.
In real combat conditions, the quality of communication is determined not only by the power of the transmitter or the characteristics of the radio station. An important role is played by the communication antenna, its design, the height of installation, and its correspondence to the operating frequency band.
The Antenna for a Radio as the Main Element of the Communication System
In any radio communication system, the antenna is a key element that ensures the conversion of an electrical signal into radio waves and vice versa. Without an antenna, a transmitter essentially cannot effectively transmit a signal into space.
The antenna for a radio determines how effectively the signal propagates in the surrounding environment. Even a powerful radio station can work unstably if an antenna with unsuitable characteristics or an incorrectly selected frequency band is used.
In field conditions, the communication antenna must ensure sufficient radiation efficiency, mechanical reliability, and stable operation in a difficult electromagnetic environment. That is precisely why the choice of an antenna for a military radio is often no less important than the choice of the radio station itself.
Types of Communication Antennas for Military Tasks
For military radio stations, different types of antennas are used, which differ in design and the principle of signal propagation. The most widespread are portable antennas for individual radios, vehicle antennas for equipment, and stationary antennas that are installed on masts or repeaters.
A portable antenna for a radio usually has a compact design and is intended for use together with portable radio stations. Vehicle antennas provide a greater communication range thanks to their greater length and better placement on equipment.
Stationary communication antennas are used to organize more stable communication channels at command posts or repeaters. In such systems, the antenna can work together with additional equipment that amplifies or distributes the signal.
Communication Range and the Characteristics of the Antenna for a Radio
The operating range of a radio station largely depends on the characteristics of the antenna. The main parameters include the operating frequency band, the gain coefficient, and the radiation efficiency.
The antenna for a radio must correspond to the frequencies on which the radio station works. If the antenna is not matched with the transmitter, a significant part of the signal energy can be lost, which leads to a reduction in the communication range.
In addition, the efficiency of the antenna in propagating the signal plays an important role. In open terrain, a correctly selected communication antenna can substantially increase the stability of communication even without changing the power of the transmitter.
Directional and Omnidirectional Communication Antennas
Communication antennas can be conditionally divided into directional and omnidirectional. An omnidirectional antenna for a radio radiates a signal approximately uniformly in all directions, which makes it convenient for mobile units.
Directional antennas, on the contrary, concentrate the signal energy in a certain direction. This makes it possible to significantly increase the communication range between two points but requires precise orientation of the antenna.
More about the parameters and principles of choosing antennas for specialized systems can be learned in the article: «Choosing an antenna for EW systems: main parameters and advice», which examines the technical characteristics of antennas and their role in the operation of radio-electronic systems.
The Impact of the Height and Placement of the Antenna on the Signal
In addition to the technical characteristics of the antenna, its placement is of important significance. The height of installing the antenna directly affects the range of radio communication, since it determines the zone of direct radio line-of-sight.
The higher the communication antenna is installed, the larger the territory covered by the signal. That is precisely why, in field conditions, antennas are often installed on masts, the roofs of equipment, or other elevated points.
Incorrect placement of the antenna can lead to a significant deterioration in the quality of communication even when using quality equipment. Obstacles in the form of buildings, terrain, or equipment can partially block the signal and reduce the effectiveness of the communication system.
Typical Mistakes When Choosing an Antenna for a Military Radio
One of the most common mistakes is using an antenna that does not correspond to the operating frequency band of the radio station. In such a case, the antenna for a radio cannot effectively transmit the signal, which leads to the loss of communication range.
Another problem is the incorrect choice of the type of antenna. In some situations, an omnidirectional antenna can be more effective, while in other cases it is more expedient to use a directional antenna.
An example of a specialized antenna for unmanned communication systems is the quadrifilar NR17 antenna with circular polarization. It is a communication antenna intended for working in systems for transmitting a signal between unmanned craft and ground stations.
The quadrifilar design forms a stable electromagnetic field with circular polarization, which makes it possible to reduce the impact of changes in the orientation of the antenna during the flight of a drone. Thanks to this, the signal remains more stable even when the drone changes its position in space.
The NR17 antenna is not a standalone communication asset. It is used as a component of more complex systems, in particular ground stations for controlling unmanned craft or video signal transmission systems. In such systems, the antenna is responsible for the effective reception and transmission of the signal between the operator and the drone.
Conclusions
The antenna for a radio is one of the key elements of any radio communication system. It is precisely the antenna that determines the effectiveness of signal transmission, the stability of communication, and the real operating range of the radio station.
The correct choice of a communication antenna must take into account the frequency band, the type of antenna, the conditions of use, and the features of the terrain. The height of installing the antenna and its placement relative to other signal sources also play an important role.
