Irregular layout circularly polarized array antenna and feed method

Abstract

The invention discloses an irregular layout circularly polarized array antenna, which is characterized by comprising n antenna units aligned in order; the i antenna unit in the antenna unit has a rotating angle phi i in relative to the first antenna unit; the feed phase position of the antenna unit in relative to the first antenna unit is phi 1, wherein i is equal to 1, 2, 3, and n. the antenna can be freely arranged according to the actual condition, namely, the antenna position point and the feed direction can be freely set upon demand; the antenna is very applicable to the application sceneof limited and irregular space. The feed method can guarantee the polarization performance in a main lobe angle domain on the basis of the guaranteed polarized array antenna.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a circularly polarized array antenna with an irregular layout and a feeding method. Background technique [0002] With the development of technologies related to satellite communications, simple linearly polarized antennas are increasingly unable to meet the needs of use. Due to the unique technical characteristics of circularly polarized antennas, there is no polarization deflection during signal transmission, thereby avoiding linear polarization. The shortcomings of signal attenuation caused by polarization deflection during antenna transmission. In addition, the circularly polarized signal has a strong anti-interference ability when it encounters obstacles and returns when the polarization direction is reversed. [0003] In order to improve the antenna gain, it is often necessary to form an array of antennas, and the common circularly polarized array antennas often adopt a parallel fee...

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Problems solved by technology

[0003] In order to improve the antenna gain, it is often necessary to form an array of antennas, and the common circularly polarized array antennas often adopt a parallel feeding method or a rotating feeding method. The former requires that the antenna units be fed in the same direction, and the latter requires that the antenna units It is evenly distributed on the circumference and the feed direction is sequentially rotated by 360° / n, n is the number of antenna units, and in actual engineering applications, the space reserved for the antenna is often limited and irregular, and the antenna units cannot be arranged in a regular manner. In addition, the wiring of the feed network needs to be considered in the project implementation. It is necessary to ensure that the gain is increased while taking into account the circular polarization performance in each angular domain. The existing two feed methods are not applicable.

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