Multi-frequency antenna

Abstract

A multi-frequency antenna. The multi-frequency antenna is used to transmit and receive wireless signals in multiple frequency bands and includes; a ground plate, which is used to provide grounding and forms a gap on the first side; a first microstrip line, which is roughly parallel to the first side and whose length is roughly equal to a plurality of One-half of the wireless signal wavelength corresponding to a lowest frequency band in the frequency band; connecting component, connecting one end on the first side and one end of the first microstrip line to form a resonant cavity with the first side and the first microstrip line body; the second microstrip line is arranged in the resonant cavity and is approximately parallel to the first microstrip line, and is approximately the first distance from the first microstrip line; the third microstrip line extends from the gap of the ground plate to the first One end of the second microstrip line is at a second distance from the gap to the ground plane; and a feed-in terminal is formed on the third microstrip line in the gap for transmitting wireless signals of multiple frequency bands. The present invention can use a single antenna body to achieve multi-frequency characteristics, and can adjust antenna characteristics through multiple adjustable factors to meet different requirements.

Description

technical field [0001] The invention relates to a multi-frequency antenna, in particular to a multi-frequency antenna with multi-frequency characteristics and multiple adjustable factors. Background technique [0002] Antennas are used to transmit or receive radio waves to transmit or exchange radio signals. Generally, electronic products with wireless communication functions, such as notebook computers, personal digital assistants (Personal Digital Assistant), etc., usually access wireless networks through built-in antennas. Therefore, in order to allow users to access the wireless communication network more conveniently, the bandwidth of the ideal antenna should be increased as much as possible within the allowable range, while the size should be reduced as much as possible, in line with the trend of shrinking portable wireless communication equipment, the antenna Integrate into portable wireless communication equipment. In addition, with the evolution of wireless commun...

AI Technical Summary

Problems solved by technology

[0003] In the known technology, for multi-frequency applications, the common way is to use multiple antennas or multiple radiators (such as slot holes of slot antennas, branches of dipole antennas, etc.) to send and receive wireless signals in different frequency bands respectively, resulting in design Increased complexity and, more seriously, the overall size of the antenna increases as the required frequency bands increase

If the installation space of the antenna is relatively limited, it may even cause interference between antennas, thus affecting the normal operation of the antenna

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