What Is an Antenna Element?

Antenna feeder is a transmission line that connects the antenna with the receiver and transmitter to transmit radio frequency energy. It is required to have good impedance matching with the antenna, small transmission loss, small radiation effect, and sufficient bandwidth and power capacity. There are parallel double lines, coaxial lines, microstrip lines, and waveguides. Generally, parallel double and coaxial lines are used as feeder lines for line antennas; microstrip and coaxial lines are used as feeder lines for microstrip antennas; and waveguides are used as feed lines for reflective surface and horn antennas. The use of electronic technology to measure the performance of radio communication systems and their components, components, equipment, as well as the electromagnetic environment and radio materials. Its parameters include electromagnetic medium, frequency, power, attenuation, impedance, standing wave, field strength, phase, waveform, and frequency spectrum. The instruments used are: signal generator, frequency meter, power meter, impedance meter, standing wave meter, field strength meter, spectrum meter, test receiver, network analyzer, oscilloscope, integrated circuit tester, transmission comprehensive tester Wait. When measuring small signals, you should prevent interference caused by stray radios, power and ground wires, and radio coupling. This type of measurement should pay attention to good matching, and it is mostly performed in a shielded room. ^[1]

Antenna feeder

Right!

Antenna feeder is a transmission line that connects the antenna with the receiver and transmitter to transmit radio frequency energy. It is required to have good impedance matching with the antenna, small transmission loss, small radiation effect, and sufficient bandwidth and power capacity. There are parallel double lines, coaxial lines, microstrip lines, and waveguides. Generally, parallel double and coaxial lines are used as feeder lines for line antennas; microstrip and coaxial lines are used as feeder lines for microstrip antennas; and waveguides are used as feed lines for reflective surface and horn antennas. The use of electronic technology to measure the performance of radio communication systems and their components, components, equipment, as well as the electromagnetic environment and radio materials. Its parameters include electromagnetic medium, frequency, power, attenuation, impedance, standing wave, field strength, phase, waveform, and frequency spectrum. The instruments used are: signal generator, frequency meter, power meter, impedance meter, standing wave meter, field strength meter, spectrum meter, test receiver, network analyzer, oscilloscope, integrated circuit tester, transmission comprehensive tester Wait. When measuring small signals, you should prevent interference caused by stray radios, power and ground wires, and radio coupling. This type of measurement should pay attention to good matching, and it is mostly performed in a shielded room. ^[1]

Chinese name

Antenna feeder

Nature

Connect

Features

The connection between the receiving antenna and the receiver

Advantages

Small distortion, small loss, strong anti-interference ability

These requirements do not have ordinary wires. Ordinary wires have severe attenuation of received signals at high frequencies, and have poor anti-interference ability, and are easily affected by various external high-frequency signals. At the same time, the characteristic impedance of ordinary wires is uncertain, and it is difficult to meet the impedance matching requirements. Commonly used antenna feeders have a characteristic impedance of 50 ohms for coaxial cable feeders. Because of the metal shielding layer, they have good anti-interference ability and small transmission loss, but they are not easy to connect.

Basic parameters:

1.Characteristic impedance of transmission line

2. Attenuation coefficient of feeder

3.Matching Concept

4.Reflection loss

5.Voltage standing wave ratio