A wideband gps antenna

Abstract

A broadband GPS antenna, the choke ring is composed of a multi-layer concentric metal ring wall with a central cavity and a common metal floor under the multi-layer concentric metal ring wall, the output SMA connector is installed under the metal floor and connected to the support Connection; two pairs of double-armed helical units and a broadband impedance transformer are installed in the central cavity of the choke ring; the inner tube of the coaxial sleeve and the outer tube of the coaxial sleeve have symmetrical slots, the symmetrical slots are in the same direction and the slotted lines are coupled ; One symmetrical arm of the double-arm spiral unit is directly welded to the upper and lower ends of the coaxial sleeve outer tube; the upper end of the other symmetrical arm bridges the upper end of the coaxial sleeve inner tube and the coaxial sleeve outer tube by welding, and its lower end Welded at the lower end of the outer tube of the coaxial sleeve; the lower end of the inner tube of the coaxial sleeve and the outer tube of the coaxial sleeve are sealed and connected by brazing; the upper end of one side of the symmetrical groove of the inner tube of the coaxial sleeve is coaxial with the center through a short circuit arc The inner conductor is connected, and the lower end of the inner conductor is connected to the output SMA connector through the coaxial medium support terminal.

Description

A wideband GPS antenna technical field The invention relates to a new broadband GPS antenna with a stable phase center, which belongs to the technical field of antennas, in particular to a design of a broadband impedance converter according to application requirements, and innovatively improves the broadband impedance converter, spiral structure, choke The combined structure of rings, as well as the ideas and methods for similar designs. Background technique With the continuous deepening and wide application of satellite navigation technology, not only ordinary ground vehicles or ships need to navigate, but also various space application platforms (such as spacecraft, satellites, space probes, aircraft, etc.) are increasingly dependent on satellite navigation. Information and positioning data, and the requirements for positioning accuracy are getting higher and higher. This requires not only to equip various platforms with adaptive GPS receiving terminals, but also to rec...

AI Technical Summary

Problems solved by technology

Existing public or known broadband/dual-band GPS antenna structures are difficult to meet application requirements

Commonly used GPS antennas mostly use microstrip antennas and dielectric-loaded helical antennas (see literature: Overv i ew of GPS Antennas, Author: Ely Levine, Afeka Te

Images