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PIFA with Archimedes spiral EBG structure used as floor board

An Archimedes spiral and Archimedes spiral technology, applied in the field of PIFA antennas, can solve the problems of low radiation efficiency of PIFA antennas and large overall volume of antennas, and achieve suppression of surface waves, backward radiation, and main radiation directions Prominent, enlarged main lobe effect

Active Publication Date: 2014-12-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low radiation efficiency and large overall volume of the existing PIFA antenna, the present invention further proposes a PIFA antenna with an Archimedes spiral EBG structure as the floor

Method used

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  • PIFA with Archimedes spiral EBG structure used as floor board
  • PIFA with Archimedes spiral EBG structure used as floor board
  • PIFA with Archimedes spiral EBG structure used as floor board

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, a PIFA antenna with an Archimedes spiral EBG structure as a floor in this embodiment includes a radiation sheet 1, a short circuit board 2, a floor 3, a coaxial inner conductor 4 and a coaxial outer conductor 5, The radiation sheet 1 and the floor 3 are arranged side by side in parallel from top to bottom, the left end of the radiation sheet 1 is connected to the left end of the floor 3 through the short circuit board 2, and the coaxial outer conductor 5 is vertically arranged below the left end of the floor 3, And the upper end of the coaxial outer conductor 5 is connected to the lower surface of the left end of the floor 3, the coaxial inner conductor 4 is vertically arranged between the radiation sheet 1 and the floor 3, and the upper end of the coaxial inner conductor 4 is connected to the lower surface of the left end of the radiation sheet 1. Surface connection, the lower end...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination Figure 1 to Figure 3 Describe this embodiment, the length of the radiation sheet 1 of a PIFA antenna with the Archimedes spiral EBG structure as the floor in this embodiment is 40mm, the width of the radiation sheet 1 is 20mm, and the first rectangular notch 1-1 The distance L1 between the left end of the radiation sheet 1 is 20 mm, the distance L2 between the second rectangular notch 1-2 adjacent to the left end of the radiation sheet 1 and the left end of the radiation sheet 1 is 10 mm, and the second rectangular notch 1-2 away from the left end of the radiation sheet 1 The distance L3 between 2 and the left end of the radiation sheet 1 is 30 mm, the width of the first rectangular notch 1-1 is 9 mm, the depth of the first rectangular notch 1-1 is 16 mm, and the width of each second rectangular notch 1-2 is 9mm, and the depth of each second rectangular notch 1-2 is 16mm.

[0010] The technical effect of this embodiment is...

specific Embodiment approach 3

[0011] Specific implementation mode three: combination Figure 1 to Figure 3 To describe this embodiment, the width of the short circuit board 2 of the PIFA antenna with the Archimedes spiral EBG structure as the floor in this embodiment is 2 mm, and the length of the short circuit board 2 is 10 mm.

[0012] The technical effect of this embodiment is: the arrangement makes the antenna resonate at the required frequency point, and the resonant depth is relatively deep. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention relates to a PIFA, in particular to a PIFA with an Archimedes spiral EBG structure used as a floor board. The PIFA with the Archimedes spiral EBG structure used as the floor board solves the problems that an existing PIFA is low in radiant efficiency and large in overall size. The PIFA with the Archimedes spiral EBG structure used as the floor board comprises a radiation sheet, a short circuit plate, the floor board, a coaxial inner conductor and a coaxial outer conductor; the radiation sheet and the floor board are sequentially arranged side by side in parallel from top to bottom; the tip of the left end of the radiation sheet is connected with the tip of the left end of the floor board through the short circuit plate; the coaxial outer conductor is vertically arranged below the left end of the floor board, and the upper end of the coaxial outer conductor is connected with the lower surface of the left end of the floor board; the coaxial inner conductor is vertically arranged between the radiation sheet and the floor board, and the upper end of the coaxial inner conductor is connected with the lower surface of the left end of the radiation sheet. The PIFA with the Archimedes spiral EBG structure used as the floor board is applied to the field of wireless communication.

Description

technical field [0001] The invention relates to a PIFA antenna, in particular to a PIFA antenna with an Archimedes spiral EBG structure as a floor, and belongs to the field of wireless communication. Background technique [0002] The radio frequency identification based on the mobile phone platform is a new technology that combines the RFID reader with the mobile phone as a mobile communication terminal, and uses RFID technology as a means to quickly obtain information through the mobile communication network platform. Since the PIFA antenna was produced, because of its small size, it can make full use of the PCB board as the ground plane, and lock the resonant length to a quarter wavelength through the ground plate. It has always been the main form of the built-in antenna. The unique frequency bandgap characteristics of the EGB (Electromagnetic Bandgap) structure make it a new type of artificial electromagnetic structure, which has a very wide range of applications in the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50
Inventor 邢立鲲李红梅孙士明王金悦
Owner HARBIN INST OF TECH
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