Broadband low-profile helical antenna with loaded parasitic patch

Abstract

The invention discloses a broadband low-profile helical antenna with a loaded parasitic patch. The broadband low-profile helical antenna with the loaded parasitic patch comprises a dielectric substrate, a metal grounding plate and a coaxial feed device, wherein the metal grounding plate is printed on the dielectric substrate, the outer surface of the coaxial feed device is connected with the grounding plate, an inner core of the coaxial feed device is connected with the bottom of a spiral metal piece, and a metal patch used for enhancing electromagnetic coupling with the spiral metal piece is arranged above the spiral metal piece. According to the broadband low-profile helical antenna with the loaded parasitic patch, a parasitic metal patch is loaded on the spiral metal piece in an electromagnetic coupling mode so that performances of a patch helical antenna can be effectively improved, profile height of the antenna is reduced, and meanwhile, symmetry of antenna radiation pattern in whole working bandwidth can be improved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a wide-band low-profile helical antenna loaded with parasitic patches. Background technique [0002] With the development of the wireless communication industry, radio frequency technology has also begun to attract more and more attention from people and industries. In the development of radio frequency technology, the antenna has always played the most important role. As a wireless signal receiving and transmitting device, the performance of the antenna has always been a very important indicator. Therefore, it is a problem to be solved to continuously improve the performance of the antenna to meet the actual use requirements. [0003] From the perspective of polarization, antennas are divided into linearly polarized antennas and circularly polarized antennas. Comparing the two, the reliability of circularly polarized antennas is particularly prominent, even in complex environ...

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Problems solved by technology

[0010] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a wide-band low-profile helical antenna loaded with parasitic patches, which solves the problem that the profile height of the wide-band low-profile circularly polarized helical antenna in the prior art is relatively high, and the height of the antenna is high. The far-field pattern when the frequency part is working is not symmetrical about the axis, and the antenna gain is small

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