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Variable frequency coupling feeder apparatus for wide-band microstrip aerial

A technology of coupling feed and microstrip antenna, which is applied in antennas, circuits, electrical components, etc., can solve the problems that the special advantages of the coplanar waveguide structure are not fully utilized, antenna bandwidth and gain limitations, etc., and achieve gain and polarization characteristics Good, increase bandwidth and gain, improve performance effect

Inactive Publication Date: 2007-09-19
INST OF ELECTRONICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, so far, most of the reports have focused on the research of coplanar waveguide rectangular slot feeding, and the special advantages of the coplanar waveguide structure have not been fully utilized, which limits the bandwidth and gain of the antenna.

Method used

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  • Variable frequency coupling feeder apparatus for wide-band microstrip aerial
  • Variable frequency coupling feeder apparatus for wide-band microstrip aerial
  • Variable frequency coupling feeder apparatus for wide-band microstrip aerial

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Embodiment Construction

[0022] The technical solution adopted in the present invention is: respectively open double T-shaped slots and H-shaped slots on the coplanar waveguide, connect the lead-out line of the coplanar waveguide with the signal source, and feed energy to the opened coplanar waveguide through the coplanar waveguide. In the coupling slot, the energy is coupled to the antenna through the coupling slot, so the coupling amount can be adjusted by changing the size of the slot. Experiments have proved that compared with other coupling slots, double T-shaped slots and H-shaped slots have the characteristics of small area but large coupling amount, which can effectively reduce the backward radiation of the antenna. Therefore, these two feeding devices become an excellent choice for increasing the bandwidth of the antenna and reducing the size of the antenna.

[0023] The idea of ​​frequency conversion feeding is proposed on the basis of studying the structural characteristics of the coplanar ...

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Abstract

The invention relates to a frequency variable coupling feeding device used in boardband microstrip antenna which includes coplanar waveguide and coupling slit thereon, and a varicap device whose two pins are fixed to two sides of the center of the coupling slit of the coplanar waveguide. Feeding manner is changed by regulating the varicap device, and the provided device can switch frequency resonant points of the antenna in a very wide band thereby realizing frequency conversion when feeding for the antenna; in the state of fixed antenna dimension and fixed shape of the coupling slit, the invention can improve the antenna performance such as better bandwidth and plus only by regulating the varicap device. The invention provided device is fit for the broadband or multi-frequency wireless communication field.

Description

technical field [0001] The invention relates to the technical field of frequency conversion feeding devices, and is a variable frequency coupling feeding device for broadband microstrip antennas. The device can be conveniently combined with different antennas by adjusting the variable capacitance device, so as to obtain broadband and high gain antenna. technical background [0002] The microstrip antenna is a new type of antenna gradually developed in the middle and late twentieth century. Due to its advantages of small size, low cost, solid structure and simple process, and convenient realization of linear polarization or circular polarization and dual-frequency operation, it is widely used in communication, broadcasting, aerospace and other fields. However, since the microstrip antenna itself is narrow-band, it is usually achieved by means of aperture coupling or multi-layer dielectric structure in order to obtain broadband characteristics. Typically, aperture coupling i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/00H01Q13/06H01Q13/08H01Q1/38
Inventor 柴雯雯张晓娟
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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