Small ultra-wideband circularly polarized planar helical antenna

A planar helical, ultra-wideband technology, applied in the directions of helical antennas, antennas, non-resonant long antennas, etc., can solve the problem that planar helical antennas cannot have extremely wide bandwidths

Pending Publication Date: 2021-04-23
南京爱而赢科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect that the planar helical antenna in the prior ar

Method used

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  • Small ultra-wideband circularly polarized planar helical antenna
  • Small ultra-wideband circularly polarized planar helical antenna
  • Small ultra-wideband circularly polarized planar helical antenna

Examples

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Embodiment

[0033] Refer to attached figure 1 As shown, a small ultra-broadband circularly polarized planar helical antenna includes a self-complementary composite helical structure 1 as the radiation unit of the antenna and a microstrip coaxial gradient balun structure 2 for feeding;

[0034] The microstrip coaxial gradient balun structure 2 is a double-sided structure, which gradually changes from two unbalanced microstrip lines to balanced parallel double lines, and the impedance transformation is realized during the gradient process; the microstrip coaxial gradient balun structure 2 The unbalanced end extends downwards to the reflector 4, and the bottom of the reflector 4 has a cross-shaped groove 5, and a ring-shaped reflective cavity is loaded around it.

[0035] The self-complementary composite spiral structure is placed on the upper layer of the FR4 dielectric board 3 as the radiator of the antenna, and the center of the radiator is loaded with a double-sided parallel gradient mic...

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PUM

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Abstract

The invention discloses a small ultra-wideband circularly polarized planar helical antenna, which comprises a self-compensating composite helical structure serving as a radiating element of the antenna and a microstrip gradient balun structure for feeding, wherein the microstrip gradient balun structure is a double-sided structure, two unbalanced microstrip lines are gradually changed into balanced parallel double lines, and impedance conversion is realized in the gradual change process; and the unbalanced end of the microstrip gradient balun structure extends downwards to a reflector. The small ultra-wideband circularly polarized planar helical antenna provided by the invention maintains a stable radiation property, the impedance bandwidth of the antenna reaches 150% (2-18GHz), a standing-wave ratio is less than 2, the antenna maintains an excellent circular polarization property in the working bandwidth (2-18GHz), and an axial ratio is less than 3dB. On the basis of ensuring the radiation property, impedance bandwidth and axial ratio bandwidth of the antenna, the plane size and profile size of the antenna are reduced, and the property of miniaturization is achieved.

Description

technical field [0001] The invention relates to a small ultra-wideband circularly polarized planar helical antenna. Background technique [0002] Wireless communication uses the characteristics of electromagnetic waves to propagate freely in space to realize long-distance exchange of information. Antennas exchange high-frequency currents with electromagnetic waves, allowing the system to transmit or receive different forms of electromagnetic waves. For a wireless communication system, the performance of the antenna has a huge impact on its work efficiency, so the development of antenna technology is a crucial part of the current development of wireless communication technology. [0003] With the continuous development of science and technology, the radio spectrum has been continuously developed, and the bandwidth of the radio system has also been continuously expanded. Ultra-wideband (UWB) antennas have their unique advantages in the field of high-speed millimeter-wave wire...

Claims

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Application Information

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IPC IPC(8): H01Q11/08H01Q1/36H01Q1/50H01Q15/14
CPCH01Q1/36H01Q1/50H01Q11/08H01Q15/14
Inventor 徐友云李大鹏蒋锐
Owner 南京爱而赢科技有限公司
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