How did wireless phones and radio stations spread signals during the Anti-Japanese War?

In War of Resistance against Japanese Aggression's time, wireless phones and radio stations transmitted signals through radio waves. Radio wave is an electromagnetic wave, which can travel a long distance in free space.

During the Anti-Japanese War, wireless telephones and radio stations were usually composed of radio transceiver equipment, radio operators and radio operators. Radio transceiver equipment includes radio transceiver, radio transceiver, radio transceiver, etc. Used to send and receive radio signals. The radio operator is responsible for translating signals into telegrams for transmission.

The transmission distance of radio waves is related to the power, frequency, antenna type, propagation environment and other factors of radio transceiver equipment. Generally speaking, the higher the power, the higher the frequency, the better the antenna type, the better the propagation environment and the farther the transmission distance will be. In addition, radio waves will be affected by various factors in the transmission process, such as atmospheric interference and obstacles, so the transmission distance will also be limited.

Generally speaking, during the Anti-Japanese War, wireless telephones and radio stations all transmitted signals through radio waves, and the transmission distance was related to the power, frequency, antenna type, propagation environment and other factors of radio transceiver equipment.