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Three-frequency frequency reconfigurable antenna for coplanar waveguide feed

A coplanar waveguide and reconfigured antenna technology, which is applied to antennas, antenna grounding devices, and devices that enable antennas to work in different bands at the same time, can solve problems such as high cost, large antenna interference, and increased equipment volume, and achieve radiation Effects of reduced influence of characteristics, good impedance matching, and high usability

Inactive Publication Date: 2014-04-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the support and integration of wireless communication equipment for various communication standards and the new communication standards in the future, the disadvantages of this solution are: the number of antennas is large, the spectrum utilization rate is small, the equipment volume is increased, and the cost is high. large interference

Method used

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  • Three-frequency frequency reconfigurable antenna for coplanar waveguide feed
  • Three-frequency frequency reconfigurable antenna for coplanar waveguide feed
  • Three-frequency frequency reconfigurable antenna for coplanar waveguide feed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: see figure 1 , the three-frequency reconfigurable antenna fed by coplanar waveguide includes an upper metal microstrip, a middle dielectric substrate 2 and a lower back floor 10. The metal microstrip includes a radiating patch 8, and the coplanar waveguide floor 6. Coplanar waveguide feeder 7, matching branch 4 and 4 PIN diodes 1, 3, 5, 9, the coplanar waveguide floor 6 surrounds the radiation patch 8, and the coplanar waveguide floor 6 and the radiation patch are connected by The four PIN diodes 1, 3, 5, and 9 are connected, the coplanar waveguide feed line 7 is located at the central opening of the lower side of the coplanar waveguide floor 6 and is integrated with the radiation patch 8, and the matching branch 4 is integrated with the upper part of the coplanar waveguide floor 6. ; The back floor 10 is a metal coating located on the back of the dielectric substrate 2 corresponding to the lower part of the coplanar waveguide floor 6 and below the coplanar w...

Embodiment 2

[0035] Example 2: see figure 1 and figure 2 , this embodiment is basically the same as the first embodiment, with the following special features: the size of the dielectric substrate (2) is 95mm*110mm*0.8mm, the upper and lower layers are metal coatings, and the material is copper.

Embodiment 3

[0036] Embodiment 3: The three-frequency frequency reconfigurable antenna fed by the coplanar waveguide is divided into three layers: upper, middle and lower layers. upper level as figure 1 As shown, it is composed of metal microstrip antenna and radio frequency PIN diodes 1, 3, 5, 9; the lower layer is as follows figure 2 shown, consisting of a metal backed floor; an intermediate layer such as image 3 As shown, the thickness of the dielectric substrate 2 used in this embodiment is H.

[0037]The antenna has a left-right symmetrical structure. The coplanar waveguide floor 6 and the coplanar waveguide feed line 7 constitute the feeding form of the coplanar waveguide. At the same time, there is a back floor 10 on the other side of the dielectric substrate 2 at the corresponding position, which is made of metal. Plating, the above constitute the feeder structure of the present invention. In the three frequency bands of operation, the characteristic impedance of the feeder is...

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Abstract

The invention relates to a three-frequency frequency reconfigurable antenna for coplanar waveguide feed, which comprises a metal microstrip on the upper layer, a dielectric substrate on the middle layer and a back floor board on the lower layer. The metal microstrip comprises a radiating patch, a coplanar waveguide floor board, a coplanar waveguide feeder, a matching branch and four PIN (P-Intrinsic-N) diodes, and the radiating patch is surrounded by the coplanar waveguide floor board. The coplanar waveguide floor board is connected with the radiating patch through the four PIN diodes, the coplanar waveguide feeder is arranged at a central opening on the lower edge of the coplanar waveguide floor board and is connected with the radiating patch into a whole, and the matching branch is connected with the upper part of the coplanar waveguide floor board into a whole. The back floor board is arranged on the back of the dielectric substrate and corresponds to metal coatings on the lower part of the coplanar waveguide floor board and under the coplanar waveguide feeder, and a microstrip antenna is formed by the back floor board and the metal microstrip. The three-frequency frequency reconfigurable antenna can work on three wireless communication frequency bands of 0.9GHz, 1.8GHz and 2.4GHz. Moreover, directional diagrams on the three frequency bands basically remain unchanged and have larger bandwidth. Meanwhile, the design of a switch bias circuit can be eliminated, and the impact of a switch on the radiation performance of the antenna can be reduced.

Description

technical field [0001] The invention relates to a three-frequency frequency reconfigurable microstrip antenna fed by a coplanar waveguide. It belongs to the category of frequency reconfigurable antennas with multiple adjustable frequencies in the field of wireless communication. Background technique [0002] With the rapid development of today's wireless communication technology, people can freely communicate with others or transfer data as long as there is wireless network coverage. New wireless technologies are constantly emerging, and the wireless frequency bands used are constantly being updated. For example, GSM900 system, DCS1800 system, 3G wireless communication system, WLAN wireless local area network system, WiMAX and other systems all use different radio frequency spectrums. The current general solution is to set up multiple corresponding antennas on the system equipment. Considering the support and integration of wireless communication equipment for various com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q5/01H01Q13/08H01Q5/10
Inventor 杨雪霞邵秉成姚望熊晗
Owner SHANGHAI UNIV
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