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slot helical antenna

A technology of helical antenna and helical wire is applied in the field of miniaturized slot helical antenna and plane helical antenna, which can solve the problems of difficulty in meeting practical application requirements and large size of helical antenna.

Inactive Publication Date: 2016-08-17
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a slotted helical antenna, which solves the technical problem that the traditional Archimedes helical antenna working at low frequencies in the prior art has a large size and is difficult to meet the needs of practical applications.

Method used

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] The slot helical antenna can be approximately regarded as the complementary form of the planar helical antenna, so it is also a frequency-invariant antenna like the planar helical antenna, and has ultra-wide frequency band, stable gain and low axial ratio.

[0019] The invention provides a planar helical antenna with a diameter of only 50 mm and an operating frequency of 0.95 GHz to 18 GHz and an axial ratio of less than 3 dB within the operating bandwidth.

[0020] Such as figure 1 As shown, the model of the ordinary slotted helical antenna is obtained by cutting off the Archimedes antenna from a disk with a radius slightly larger than the outer diameter of the Archimedes helical antenna, so that the slot part is the traditional Archimedes helical antenna . Archimedes spiral antenna outer diameter R 0 is 25mm, by formula C=2πR 0 ≥1....

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Abstract

The invention discloses a groove helical antenna which comprises a base plate part and an antenna part. The base plate part is covered with the antenna part, the antenna part is a groove radiation plane helical antenna body and comprises an antenna arm and a groove gap, the antenna arm is of a dual-arm symmetrical structure, the groove gap is a plane Archimedes helical line, an groove is formed in the antenna arm to increase the electric length of the antenna, and a plurality of chip resistors are loaded and connected to the outmost ring of the antenna arm. Compared with a common groove helical antenna, the low frequency point of the antenna is successfully reduced to 0.94 GHz from 1.85 GHz under the condition that the antenna size is unchanged. The axial ratio of an existing common groove helical antenna in a low frequency band is larger than 3 dB, the requirement for antenna circular polarization is not met, all the axial ratios of the groove helical antenna in the work broadband are smaller than 3 dB, and gains in 2 GHZ to 18 GHz are larger than zero.

Description

technical field [0001] The invention relates to a planar helical antenna, in particular to a miniaturized slot helical antenna, which belongs to the technical field of ultra-wideband antennas. Background technique [0002] At present, UWB antennas are widely used in military and commercial communication fields. The ultra-wideband antenna is aimed at the relative bandwidth of the antenna to send and receive signals. When the ratio of the bandwidth of the signal to the center frequency is less than 1%, it is called a narrowband, and the ratio of the bandwidth to the center frequency is between 1% and 25%. It is called a broadband. When the ratio of bandwidth to center frequency is greater than 25%, it is called ultra-wideband. An ultra-wideband antenna is an antenna device used to transmit and receive ultra-wideband signals. UWB antennas in the prior art include equiangular planar helical antennas and Archimedes planar helical antennas developed by Dyson et al. [0003] Sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q13/00H01Q23/00
Inventor 田雨波王兆尹邱大为
Owner JIANGSU UNIV OF SCI & TECH
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