The characteristics of antennas, including built-in antennas, and the mechanism by which stable performance is achieved.
The optimal shape of an antenna varies depending on the frequency and application. The most efficient antenna is one that is half the length of the wavelength of the frequency being used.
High-frequency waves, which are the source of radio waves, have the property of reversing polarity every half wavelength. Therefore, when the length of the antenna conductor exceeds half a wavelength, the transmission and reception of radio waves do not work well. By making the length of the antenna conductor half the wavelength of the frequency, the radio waves resonate with the antenna. By adjusting the length of the antenna according to the wavelength of the frequency, the antenna and the transmitted radio waves enter a resonant state, allowing maximum power to be radiated.
Similarly, in a receiver, the received radio waves and the antenna enter a resonant state, enabling the capture of maximum power.
[Content of the document]
- About the transmission and reception of radio waves and the length of the antenna
- About the basic shapes of antennas
- About precautions for built-in antennas
For details on the mechanism of built-in antennas and points to consider during design, please download the PDF or feel free to contact us.