Ultra-wideband low-profile circularly-polarized two-arm spiral antenna

A helical antenna and low-profile technology, applied in the field of ultra-wideband low-profile circularly polarized dual-arm helical antennas, can solve problems such as high gain and low profile, and achieve good circular polarization performance, high gain, and stable dielectric constant Effect

Inactive Publication Date: 2016-08-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-wideband low-profile circularly polarized dual-arm helical antenna to solve the contradiction of the existing helical antenna in consideration of its ultra-wideband, low profile, circular polarization, and high-gain development

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultra-wideband low-profile circularly-polarized two-arm spiral antenna
  • Ultra-wideband low-profile circularly-polarized two-arm spiral antenna
  • Ultra-wideband low-profile circularly-polarized two-arm spiral antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described in detail below with reference to the drawings and examples, but the embodiments of the present invention are not limited thereto.

[0032] The center frequency point of the dual-arm helical antenna provided in this embodiment is 21GHz, and its structure is as follows Figure 1 to Figure 5 As shown, this embodiment can achieve an impedance bandwidth of 38 GHz within a back cavity section thickness of 5.2 mm, a gain of 6 dB above 5 GHz, a gain of 8 dB above 7 GHz, a maximum gain of 11 GHz, and an axial ratio of less than 9 dB in the entire frequency band, below 20 GHz Meet less than 5dB.

[0033] An ultra-wideband low-profile circularly polarized dual-arm helical antenna provided in this embodiment includes:

[0034] Back cavity 1: its structure is as figure 1 As shown, its specific dimensions are as Figure 7 , Figure 8 As shown, the section thickness of the back cavity is 5.2mm, the outer diameter of the back cavity ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of antennas, provides an ultra-wideband low-profile circularly-polarized two-arm spiral antenna, and aims at solving the contradiction of consideration of ultra-wideband, low profile, circular polarization and high gain development of an existing spiral antenna. The spiral antenna comprises a back cavity, a radiator dielectric substrate, an antenna spiral arm, a balun and a coaxial joint, wherein a feeding port is formed in the center of the radiator dielectric substrate; the antenna spiral arm is located on the upper surface of the radiator dielectric substrate and is connected with the upper end of the balun through the feeding port; the balun is located in the back cavity; the lower end of the balun is connected with the coaxial joint; the back cavity comprises a cylinder and a slope; the cylinder is arranged at the center of the back cavity; the slope is connected with the cylinder; the cylinder and the slope jointly form a circular truncated cone; an annular groove and a window are formed in the cylinder; and the window is used for arranging the balun. By the spiral antenna provided by the invention, the performance requirements of the wide band, low profile, circular polarization and high gain of the spiral antenna are well considered; and meanwhile, the frequency band bandwidth of the antenna is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an ultra-wideband low-profile circularly polarized double-arm helical antenna. Background technique [0002] With the development of aerospace and military technology, the frequency of information transmission gradually develops to high frequency, which requires the bandwidth of the antenna to gradually widen. With its advantages of miniaturization, broadband, integration, high gain, and low cost, ultra-wideband technology has great application prospects in many fields such as satellite navigation, anti-radiation missiles, and electronic countermeasures. The ultra-wideband helical antenna itself is a circular pole However, the bandwidth of the antenna is difficult to achieve 10 octaves, and it is even more difficult to achieve 20 octaves. For modern electronic warfare, this ultra-bandwidth characteristic is of great significance. At present, the methods of widening ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/50
CPCH01Q1/36H01Q1/50
Inventor 张怀武张国龙吕青青罗敏周海澎
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap