High-gain broadband directional element antenna with cavity reflector
A vibrator antenna and reflector technology, applied in the field of high-gain broadband directional vibrator antennas, can solve the problems of increasing the antenna volume and structural complexity, the electromagnetic wave gain is large, and the position of the reflector is invariable, etc., and achieves enhanced directional radiation characteristics, High gain, effect of increased gain bandwidth
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[0029] The invention provides a high-gain broadband directional dipole antenna with a cavity reflector. The basic idea is: add a cavity reflector under the omnidirectional broadband dipole antenna; the cavity reflector is a open-top container. In this scheme, the reflective object is changed from a flat plate to a cavity structure. The electromagnetic energy radiated from the omnidirectional antenna to the bottom of the antenna is reflected back by the cavity structure and the electromagnetic energy radiated to the top of the antenna can always produce the effect of in-phase superposition within a certain frequency band. This increases the gain bandwidth of the antenna and can achieve good gain flatness within a larger bandwidth.
[0030] This solution can use air as the medium. In practice, other substances can also be filled in the cavity as a medium, such as FR4 medium with a dielectric constant of 4.4, so that the size of the antenna can be reduced and the array arrangeme...
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