What is the best length of walkie-talkie antenna?

When the antenna length of public walkie-talkie is between 36-37 cm or 18- 19 cm, the signal is the best.

1. Only in the most suitable range can the function of the antenna be maximized. The range of antenna length is related to the frequency and wavelength of interphone (radio station). Take the most common public walkie-talkie for example. Our country stipulates that the working frequency of civil interphone is between 409 ~ 4 10 MHz. Since the propagation speed of radio is about equal to the speed of light, the wavelength is the speed of light divided by the working frequency (don't forget that m means "one million"). In other words, the wavelength of the public walkie-talkie is about 0.73 meters.

2. The length of the antenna can be determined according to the working frequency (i.e. wavelength) of the radio or interphone. Theory and practice prove that when the antenna length is equal to multiple wavelength lengths, such as 1 multiple, 1/2, 1/4, the transmission and reception effect is the best. That is to say, when the antenna length of public walkie-talkie is between 36-37 cm or 18- 19 cm, the signal is the best. For civil public walkie-talkies (that is, walkie-talkies commonly used in property, security and other occupations), as long as the antenna length is not less than 18 cm, good communication effect can be guaranteed.