What Are the Different Types of Amateur Radio Antennas?

Amateur radio is a hobby that is very common throughout the world. Amateur radio enthusiasts are also known as amateur radio enthusiasts or HAMs. There are approximately 1.4 million HAMs officially registered with the U.S. government, approximately 200,000 in China, and approximately 6 million worldwide. people. They must learn the relevant knowledge and pass the test in their country to obtain an amateur radio license, and at the same time receive the call sign assigned by the government. The call sign is the only identity of an amateur radio enthusiast, and it is also an honor.

Amateur radio is a hobby that is very common throughout the world. Amateur radio enthusiasts are also known as amateur radio enthusiasts or HAMs. There are approximately 1.4 million HAMs officially registered with the U.S. government, approximately 200,000 in China, and approximately 6 million worldwide. people. They must learn the relevant knowledge and pass the test in their country to obtain an amateur radio license, and at the same time receive the call sign assigned by the government. The call sign is the only identity of an amateur radio enthusiast, and it is also an honor.

Chinese name

Amateur radio

Foreign name

ham radio

Brief introduction

A hobby that is very common all over the world

During natural disasters

Probably the only means of communication available

the way

Simplex, radio-to-radio communications

Introduction to Amateur Radio

Licensed amateur radio enthusiasts can enjoy two-way amateur radio communication experiments and exchanges with friends and relatives. Of course, the other party also needs a license. They also make up the largest disaster and emergency communications service platform. They continue to learn about electronics and radio and are proud to receive award-winning certificates for various radio operation competitions. To get started in the amateur radio life, turning to the amateur radio clubs around you is a good start: they can answer your questions and tell you how to get a certificate and start an air conversation.

Certified amateur radio enthusiasts are allowed to use stronger and more effective radio communication methods, which is often the only reliable means of communication after a disaster. Many of these methods are simplex, radio-to-radio communication, which avoids many other communication methods that require many problems caused by network support. In the amateur radio simplex communication method, experienced operators are allowed to use VHF or UHF frequencies suitable for short-range communications, or HF (short-wave) frequency bands suitable for global communications. HAM also has a high-power signal amplifier to aid communication. It is often placed on the top of a mountain or a tall building, allowing users to communicate with small handheld, mobile radios thousands of miles away-but you You have to hold a license that allows it.

Amateur Radio Applications

In the field of amateur radio, there are many worthwhile directions, such as public emergency response teams, antenna theory, satellite communications, disaster response, weather forecast, subcontracting communications (using internet-like data transmission protocols for radio communications), DX Communication (by means of ionospheric reflected radio waves or special propagation phenomena to communicate with thousands of miles away), IRLP (combining the Internet and radio into a communication network), QRP (very low power radio communication).

The most active and exciting thing is DX communication. Amateur radio enthusiasts collect QSL cards from other countries to document the continents and regions they have successfully connected. In some areas there are very few amateur radio enthusiasts. Therefore, when a rare call sign appeared in the radio wave to show that it came from those rare areas, a large number of HAMs would swarm at once, striving for an opportunity for radio communication with him. In order to have this favored and enjoy the opportunity of communication initiative, swarms of HAM flooded into remote areas and islands (for example, the small island on the Atlantic Ocean, usually uninhabited: Bouvet Island, where the call sign is a very rare 3Y beginning ). This expedition can help HAM get awards like DXCC awards faster. In order to receive the DXCC award, each HAM must receive at least a QSL card from 100 countries around the world confirming the success of the communication.

Amateur Radio Sports

The various communication competitions are another activity that HAM is very interested in: within a limited time period (generally 24 to 48 hours), each HAM tries to communicate with other HAMs as much as possible. Race enthusiasts may focus on one area, such as DX radios, or radios powered only by emergency equipment or batteries. Some of these competitions restrict communication methods, while others do not.

Some HAMs use the moon's surface to reflect radio waves in the VHF or UHF bands to communicate with other HAMs. This is called EME (Earth-Moon-Earth). This method requires a lot of land to build a huge antenna array. Other HAMs are keen on the QRP (low power) method: Use very small power to achieve global communication, and signals of five watts or less can be used. People on the other side of the earth heard.

Amateur radio is regarded by China's education department as information-based education, and many schools have gradually set up campus collective amateur radio stations. The more famous call signs are: BY4RRR (Nanjing Third Senior Middle School Amateur Radio), BY2HIT (Harbin Radio Club).

Amateur radio modern

Even in the era when the internet has arrived, amateur radio has not been reduced due to highly developed communications. Today, there are still many amateur radios, as evidenced by the chart of the American Radio Union.

In times of crisis and natural disasters, amateur radio may be the only means of communication that can be used.

On March 18, 1909, Einar Dessau performed his first amateur radio broadcast with a short-wave radio transceiver.

Tony Hancock's TV series "The Radio Ham" was performed on BBC in 1960. In this series he plays a poorly skilled amateur radio operator. The series is still popular today, and it showcases memories of the heyday of amateur radio.