A Method for Realizing Dual Frequency and Dual Polarization of Microstrip Reflectarray Antenna
A reflectarray antenna and dual-polarization technology, applied to antennas, devices that enable antennas to work in different bands at the same time, antenna unit combinations with different polarization directions, etc., can solve problems such as difficulties, and achieve easy engineering implementation and simple process , universal effect
Inactive Publication Date: 2018-02-13
NAT SPACE SCI CENT CAS
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[0004] The purpose of the present invention is to overcome the existing dual-frequency dual-polarization reflectarray antenna to achieve two similar frequency bands and the simple design of the dual-frequency reflectarray has certain difficulties, thereby providing a microstrip reflectarray antenna to achieve dual-frequency dual polarized approach
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[0031] The present invention will be further described now in conjunction with accompanying drawing.
[0032] Those skilled in the art know that in order to transform the wave radiated from the feed into a focused beam, the wave reflected from each microstrip reflector in the microstrip reflectarray antenna must undergo certain phase compensation. There are four typical methods of phase compensation: one is to load phase delay lines of different lengths on the microstrip patch for phase adjustment; the other is to achieve phase compensation by changing the size of the microstrip reflection unit, and by rationally designing each The size of the patch is used to adjust the phase of the reflected wave to compensate for the phase difference caused by the different spatial distances from the feed to each patch unit; the third is to rotate the same circularly polarized microstrip unit at different angles to achieve different phases Compensation; the fourth is to achieve phase adjust...
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The invention relates to a method for realizing dual-frequency and dual-polarization of a microstrip reflectarray antenna, comprising: using reflectarray units with independent characteristics as units in the microstrip reflectarray antenna; determining the units in the microstrip reflectarray antenna The center frequency of the two frequency bands during work; determine the size of the unit period, the aperture and focal length of the reflectarray, and whether the feeding method is forward feed or offset feed, and then determine the coordinates of the center positions of each unit in the microstrip reflectarray antenna; calculate each The phase size of the compensation required by the units at the center frequencies of the two working frequency bands at the position; the simulation calculation of the reflection phase curves of the reflector units at the center frequencies of the two working frequency bands respectively; The size of the phase to be compensated and the reflection phase curve at the center frequency of the frequency band determine the size of the unit at each position in the x direction and the y direction. This method achieves different operating frequencies in different polarization directions.
Description
technical field [0001] The invention relates to the technical field of array antennas, in particular to a method for realizing dual-frequency dual-polarization of a microstrip reflective array antenna. Background technique [0002] In recent years, high-gain antennas have been widely used. Traditional high-gain antennas mainly include parabolic reflector antennas or array antennas, but both have obvious disadvantages. High-gain parabolic reflector antennas are bulky, easily damaged due to high wind resistance, and difficult to transport, and their curved surfaces also place high requirements on processing accuracy. The array antenna requires a complex feed network, which will lead to an increase in its transmission loss, and it will be difficult to guarantee the efficiency of the antenna. [0003] The microstrip reflectarray antenna is an antenna array that combines the above two high-gain antennas. It has the advantages of light weight, simple manufacture, low price, easy ...
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IPC IPC(8): H01Q13/08H01Q21/24H01Q5/30
Inventor 薛飞王宏建易敏陈雪
Owner NAT SPACE SCI CENT CAS