Microstrip line coupled feeding broadband circularly polarized eight-arm slot helical antenna

Abstract

The invention discloses a microstrip line coupled feeding broadband circularly polarized eight-arm slot helical antenna, and relates to the field of satellite navigation. The microstrip line coupled feeding broadband circularly polarized eight-arm slot helical antenna comprises a grounding plate and a helical antenna main body fixed on the grounding plate. The helical antenna main body comprises adielectric layer which surrounds and is closed along the edge of the grounding plate; a metal layer is arranged on the outer surface of the dielectric layer; eight slot helical antennas are formed byhollowing out and slotting the metal layer and then forming grooves, and all the slot helical antennas uniformly surround the whole dielectric layer; and a microstrip feeder line is arranged on the inner surface of the dielectric layer and is connected with the grounding plate through a coaxial probe. According to the invention, the problems that the feeding mode of the helical antenna is complex, the gain bandwidth range is not enlarged greatly, and higher requirements cannot be met in the prior art are solved; and the invention provides the helical antenna which greatly enlarges the gain bandwidth range under the condition of miniaturization, realizes effective radiation and circular polarization through a simple feeding mode and can be applied to satellite navigation system terminal equipment.

Description

technical field [0001] The invention belongs to the field of satellite navigation, in particular to a broadband circularly polarized eight-arm slot helical antenna for microstrip line coupling and feeding. Background technique [0002] As the terminal equipment of the wireless communication system, the antenna can convert the electromagnetic wave radiation in space into electrical signals, and is the core component of the communication system, and its performance directly affects the quality of communication. Due to the circular polarization pattern radiated by the four-armed helical antenna is heart-shaped, has a wide beam width, and good circular polarization performance at high and low elevation angles, the four-armed helical antenna has now become the main antenna of the satellite navigation system. one of the forms. [0003] With the rapid development of satellite communication and navigation technology, the market has higher and higher requirements for antenna product...

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the problems in the prior art that the feeding mode of the helical antenna is complicated, and the range of the gain bandwidth is not large enough to meet higher requirements. A helical antenna that can be used in satellite navigation system terminal equipment to achieve effective radiation and circular polarization through a simple feeding method

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