Broadband helical antenna and design method thereof

A helical antenna and wide-band technology, which is applied in the field of broadband helical antenna and its design, can solve the problem that the helical antenna cannot meet the multi-frequency and broadband requirements, and achieve the effect of wide bandwidth
CN110797637AActive Publication Date: 2020-02-14QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO UNIV
Publication Date
2020-02-14

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Abstract

The embodiment of the invention discloses a broadband helical antenna and a design method thereof. The antenna comprises a hollow cylinder and a spiral metal wire, wherein the inner layer of the hollow cylinder is a metal ground, the outer layer of the hollow cylinder is a magnetic material, the spiral metal wire is wound on the outer side of the magnetic material, the spiral metal wire is furtherprovided with a feeding point and a short circuit point, and the short circuit point is used for conducting the spiral metal wire and the metal ground. According to the broadband helical antenna provided by the embodiment of the invention, the short circuit point is added, the helical metal wire and the metal ground are connected, the current distribution can be changed, a new current path is formed to form a new radiation oscillator, a plurality of resonance modes are excited in a frequency band of 10-80MHz, a multi-band and broadband antenna is formed, and the broadband helical antenna hasa wide bandwidth. The antenna provided by the embodiment of the invention further comprises a radio frequency switch which is used for adjusting the disconnection or connection state of the short circuit metal sheet and the disconnection or connection state of the spiral metal wire so as to adjust the resonant frequency.
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Description

technical field

[0001] The present application relates to the technical field of antennas, in particular to a broadband helical antenna and a design method thereof. Background technique

[0002] The antenna is a component used to transmit or receive electromagnetic waves in radio equipment. It transforms the guided wave propagating on the transmission line into electromagnetic waves propagating in free space, or performs the opposite transformation. It is widely used in radio communication, broadcasting, and television. , radar, navigation, electronic countermeasures, remote sensing, radio astronomy and other engineering systems.

[0003] In many wireless communication systems, antennas are required to be small, multi-frequency, and wide-band, such as antennas in capsule endoscopes. In the prior art, in order to reduce the size of the antenna in the capsule endoscope, the antenna is usually made into a helical structure. Since the main part of the capsule endoscope is cylin...

Claims

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