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Inductive Metal Loop Antenna Structure

A technology of antenna structure and metal ring, which is applied in the direction of antenna coupling, antenna support/mounting device, etc., can solve the problems of reducing the size of the mobile phone display screen, interference, etc., and achieve the effect of simple structure and improved matching performance

Active Publication Date: 2018-10-12
SHENZHEN SUNWAY COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to avoid the interference of the PCB circuit board on the metal loop antenna and ensure that the antenna can work normally in the full frequency band (698MHz960MHz and 1710MHz-2690MHz), usually a gap of more than 2mm is required between the PCB circuit board and the antenna, which will reduce the display screen of the mobile phone. size, which is contradictory to the current demand for large-screen smartphones

Method used

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  • Inductive Metal Loop Antenna Structure
  • Inductive Metal Loop Antenna Structure
  • Inductive Metal Loop Antenna Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Please refer to figure 1 , wherein the left side is a front view, the middle is a left view, and the right side is a right view. Embodiment 1 of the present invention is: a metal loop antenna structure with an inductance, which is suitable for mobile devices such as mobile phones, palmtop computers, and iPADs. It includes a seamless metal ring 1 as an antenna, and a PCB board is arranged inside the metal ring 1, and the PCB board includes a grounding plate 5, an upper clearance area 6 and a lower clearance area 7; an annular gap 8 is formed between the metal ring 1 and the PCB board , the width of the gap, that is, the distance between the metal ring and the PCB board is 0.8-1.2mm, preferably 1mm, which can maximize the size of the display screen and meet the needs of consumers for large-size screens. The gap 8 is filled with PC-ABS material as an antenna box; the annular gap inside the first side of the metal ring 1 is provided with an antenna grounding point 2, and th...

Embodiment 2

[0031] Please refer to image 3 , Embodiment 2 of the present invention adds a matching network 10 on the basis of Embodiment 1. The matching network is arranged between the antenna feed point 3 and the PCB board, and includes a first capacitor C1, a second capacitor C2, a second capacitor An inductance L1 and a second inductance L2, the first capacitor C1 and the second capacitor C2 are connected in series, and one end is connected to the antenna feed point 3, wherein the antenna feed point 3 is preferably a 50 ohm port, and the other end is connected to the PCB board Antenna port 11; one end of the first inductor L1 is connected to the common end of the first capacitor C1 and the second capacitor C2, and the other end is grounded; one end of the second inductor L2 is connected to the antenna port 11 of the PCB board, and the other end is grounded.

[0032] like Figure 4 Shown is a schematic diagram of the comparison of antenna reflection coefficients of Embodiment 1 (witho...

Embodiment 3

[0036] Please refer to Image 6, Embodiment 3 of the present invention further adds grounding strips 9a-9d on the basis of Embodiment 1 or Embodiment 2. The grounding strips are part of the grounding plate 5, located on the four corners of the grounding plate 5, and protrude Extends to both sides of the upper and lower clearance zones. Preferably, the ground strips 9a and 9b located on both sides of the upper clearance zone 6 are straight strips, and the size in the Y direction is consistent with the upper clearance zone, for example, 8mm, and the size in the X direction is, for example, 2mm; the lower clearance zone The ground strip 9c on the left is L-shaped, and the width of each segment of the L-shape is, for example, 2 mm. The long side of the L-shape extends along the Y direction, and the size in the Y direction is slightly smaller than the lower clearance area, such as 9 mm, short The side extends along the right side of the headroom area in the X direction, and the si...

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Abstract

The invention discloses a metal loop antenna structure with an inductor, and the structure comprises a seamless metal ring; an inner side of a first side edge of the metal ring is provided with an antenna grounding point; an inner side of a second side edge of the metal ring is provided with an antenna feed point; the inner side of the second side edge of the metal ring is provided with the inductor, wherein one end of the inductor is connected with the metal ring; and the inductor is located above the antenna feed point. The structure is simple, can cover the whole cellular band, can improve the matching performance of high frequency bands of an antenna through the introduction of the inductor, and can adjust the working frequency of the antenna through the adjustment of the position or parameter values of the inductor.

Description

technical field [0001] The invention relates to the communication field, in particular to an inductive metal loop antenna structure. Background technique [0002] As an attractive design, some smart phones have adopted a metal ring shell at present, and the metal ring can be used as an antenna, thereby saving the internal space of the mobile phone for the development and improvement of other functions. For example, the Chinese utility model patent CN203617416U discloses a seamless metal ring mobile phone antenna, which includes a casing, a conductive peripheral casing component is arranged on the periphery of the casing, and other circuit modules are arranged inside the casing. However, in order to avoid the interference of the PCB circuit board on the metal loop antenna and ensure that the antenna can work normally in the full frequency band (698MHz960MHz and 1710MHz-2690MHz), usually a gap of more than 2mm is required between the PCB circuit board and the antenna, which wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/52H01Q1/22
Inventor 罗希特·钱德拉
Owner SHENZHEN SUNWAY COMM