Circularly polarized reconfigurable antenna integrated with adjustable phase-shifting power divider

Abstract

The invention relates to a circularly polarized reconfigurable antenna integrated with an adjustable phase-shifting power divider. The antenna includes a first dielectric substrate, a second dielectric substrate, the adjustable phase-shifting power divider, a grounded metal plate, a main radiation sheet, and a parasitic radiation sheet. The adjustable phase-shifting power divider and the ring-shaped main radiation sheet are printed on the upper surface of the first dielectric substrate. The grounded metal plate is printed on the lower surface of the first dielectric substrate. The second dielectric substrate is a cylinder, and the parasitic radiation sheet is printed on the upper surface thereof. The adjustable phase-shifting power divider is connected with the main radiation sheet. The first dielectric substrate is separated from the second dielectric substrate and fixed by a plurality of insulating studs. The circularly polarized reconfigurable antenna integrated with the adjustablephase-shifting power divider, which is provided by the invention, has the advantages that (1) the characteristics of left-handed circular polarization and right-handed circular polarization are realized under the same antenna aperture, and the antenna has a circularly polarized reconfigurable function; (2) the switching speed is fast; the insertion loss is small; the control is simple; and (3) theantenna is easy to process and manufacture, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a circularly polarized reconfigurable antenna integrated with an adjustable phase-shifting power divider. Background technique [0002] The antenna is an important component in the wireless communication system, which is responsible for the transmission, reception and conversion of electromagnetic energy. With the rapid development of modern wireless communication technology, the requirements for antenna performance are getting higher and higher. Compared with linearly polarized antennas, circularly polarized antennas have rotational orthogonality, high suppression of reflected wave signals, and can receive arbitrary linearly polarized electromagnetic wave signals, so they are widely used in radio frequency identification, wireless local area networks and Wireless communication systems such as satellite navigation and positioning. [0003] In order to ...

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Problems solved by technology

[0004] Reconfigurable circularly polarized antennas usually use mechanical, optical, and electronic methods to adjust the working state of the antenna. The mechanical method uses actuators and other actuators to adjust the shape and structure of the antenna, and the adjustment range is large. However, it needs Additional mechanical devices, while difficult to meet the requirements of high speed and high precision

The optical method is to change the current distribution on the surface of the antenna by controlling the on-off state of the photoconductive switch. The response speed is fast and easy to control, but the insertion loss of the photoconductive switch is large and the efficiency of the antenna is reduced.

The electronic method is to use the tuning or switching characteristics of electric adjustment devices such as PIN diodes, varactor diodes, and radio frequency chips to adjust the radiator structure of the antenna, the position of the feed point, or the output phase relationship of the feed network. The adjustment is flexible, fast, and high-precision. , The loss is small, but the number of electric adjustment devices usually required is large, which makes it difficult to manufacture the antenna

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