Metal Resistant High Gain Circularly Polarized Satellite Receiving Antenna

Abstract

The invention discloses a metal-resistant high-gain circularly-polarized satellite receiving antenna, and the antenna comprises two dielectric substrates, a radiation patch, and at least four probes.The lower surface of the lower dielectric substrate is provided with a feed network, and the upper surface is provided with a metal floor. The size of the metal floor is less than the size of the upper dielectric substrate. The radiation patch covers the whole top surface and side surfaces of the upper dielectric substrate. At least four probes pass through the two dielectric substrates and the metal floor, and are distributed in rotational symmetry. The radiation patch achieves the feed through a feed network via at least four probes. Through reducing the size of the antenna floor, increasingthe side surface from the radiation patch to the dielectric substrates and maximizing the usable radiation aperture of the antenna, the antenna improves the high-gain performance, employs a multi-point feed method, and guarantees that the antenna still can guarantee the circularly polarized performances when the antenna works on a big metal reflection surface (a car roof).

Description

technical field [0001] The invention relates to a satellite receiving antenna, in particular to a metal-resistant high-gain circularly polarized satellite receiving antenna. Background technique [0002] With the development and popularization of satellite communication, people's daily life is increasingly dependent on satellite communication. This requires that the satellite communication system can be better integrated with people's daily life, and have good enough adaptability to meet people's every-time demand for satellite communication. [0003] In order for the satellite communication system to have better adaptability, the satellite receiving antenna needs to basically maintain the original performance in various special environments, such as when it works on a large metal reflector. However, when ordinary single-feed or double-feed circularly polarized antennas work directly on a large metal surface, they will be affected by the metal boundary, and their performanc...

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Problems solved by technology

The first method will reduce the radiation efficiency of the antenna, the second method is very difficult to design and requires high process precision, and the third microstrip antenna has the characteristics of simple structure and low profile, making it the main direction of research on anti-metal antennas , but most of the existing ceramic circularly polarized antennas are cut-off patches, and when they work on large metal reflectors, the circular polarization performance will be greatly deteriorated

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