What Is an Antenna Analyzer?

Antenna analyzer is an instrument used to measure the characteristics of each antenna. It has the name of "antenna multimeter". With the development of the electronic manufacturing industry, the degree of chip integration is getting higher and higher, and the design and manufacturing requirements of functional circuits are becoming higher and higher. Amateur radio amateurs have become increasingly difficult to complete high-performance transceivers, and Making the antenna is relatively simple. Since the development of radio, the electronic circuit of the transceiver has been updated many times, and the basic form of opening has been inherited and retained. It is still widely used in amateur and professional radios.

Antenna Analyzer

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The antenna analyzer is used to measure the characteristics of each antenna.

The production of traditional basic passive antennas does not require semiconductor electronic circuits. The simplest antenna is even a combination of wires of a certain length (ordinary wires). The technical requirements are not high and the threshold is low. Even novices with little expertise are also very It is easy to get started, and you can gradually try to make some complex antennas. In the process of making antennas, enthusiasts will experience the joy of hands-on and the sense of achievement of ultimate success. Therefore, homemade antennas have become another development direction for many amateur electric enthusiasts following long-distance communication. In the amateur radio world, there is also a saying that "playing the radio is the antenna". The antenna analyzer is an ideal measuring instrument for making adjustments to the antenna. It is an essential device for amateur radio enthusiasts.

Many hams use ordinary multimeters to measure the electrical resistance of finished car antennas bought on the market. It was surprisingly found that some antenna cores and oscillators have infinite resistance values and are in an open circuit state. Some antenna cores and shell resistance are very small and short-circuited. State, thought the antenna was damaged. In fact, otherwise, if the antenna adopts capacitive matching coupling, the phenomenon that the antenna child and the vibrator are open-circuited (capacitors pass AC and block DC), and if some coils are matched at the bottom of the antenna, the antenna core and the shell will appear. The phenomenon of DC short circuit (the coil is energized and AC blocked). The multimeter resistance test relies on DC current, which is completely different from the high-frequency current in the actual operation of the antenna, so it cannot be used for antenna characteristic measurement.

Antenna analyzer is a good helper for antenna installation. Most large commercial-grade antennas require simple assembly during installation, and some antennas require simple adjustments after installation to achieve the best flj status. This is also a common issue when installing short-wave antennas at ham. The antenna analyzer can quickly understand the condition of the antenna, whether the resonance point is high or low, so as to determine the direction of the next step of adjustment. The handheld antenna analyzer is not only small and compact, but also has a built-in battery, so ham does not have to move the radio to the top of the building when setting up the antenna, and there is no longer a problem with the power supply for testing the antenna. An antenna analyzer can do it completely, and it is much more convenient to operate than "radio + standing wave table".

Antenna analyzers are widely used in the fields of antenna test development, DIY production, installation and commissioning, inspection and maintenance. The reason why the antenna analyzer is known as the antenna multimeter is that ordinary multimeters are only suitable for the measurement of DC and power frequency AC power, and are not suitable for the measurement of radio frequency bands with much higher frequencies. The antenna analyzer is a powerful tool for detecting and maintaining antennas. Outdoor antennas are subject to external wind and rain, which is prone to failure of the combined components. Therefore, the condition of the antenna needs to be periodically checked to ensure the communication effect and the safety of the transmitter. Sometimes the communication effect of the transmitter suddenly deteriorates or works. If the current is abnormal, you also need to quickly check the antenna condition to troubleshoot. Most stations do not have a built-in standing wave table, so you need to connect a dedicated Bao standing wave table to detect the standing wave ratio. The antenna analyzer can measure independently without the cooperation of the host of the station. The standing wave at each frequency of the antenna feed system can provide more reference data, which greatly improves the detection efficiency. The handheld portable antenna analyzer has a built-in battery, which is more suitable for field work, and the antenna can be detected on the roof.