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Multiband Antennas for High Screen-to-Body Mobile Terminals without Lumped Parameter Components

A multi-band antenna, lumped parameter technology, applied in the directions of antennas, electrical components, antenna grounding devices, etc., can solve problems such as loss, and achieve the effects of simple antenna structure, wide coverage and easy production.

Active Publication Date: 2018-08-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of lumped parameter elements often causes loss

Method used

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  • Multiband Antennas for High Screen-to-Body Mobile Terminals without Lumped Parameter Components
  • Multiband Antennas for High Screen-to-Body Mobile Terminals without Lumped Parameter Components
  • Multiband Antennas for High Screen-to-Body Mobile Terminals without Lumped Parameter Components

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Embodiment Construction

[0035] The present invention proposes a mobile terminal WWAN / LTE antenna capable of covering multiple frequency bands without using lumped parameter elements and under the condition of small non-floor height. Its front view is as follows figure 1 shown. It can be seen from the figure that the antenna proposed by the present invention is mainly composed of four parts: the antenna main body, the dielectric board, the microstrip feeder, and the metal floor. The main part of the antenna is printed on the dielectric board, and part of it is folded to form a three-dimensional folded structure in space.

[0036] The material used for the dielectric plate is FR4, and the loss tangent is 0.02. The metal floor printed on the front of the dielectric board is connected to the main body of the antenna, which approximately replaces the screen and circuit components of the mobile terminal device, and also plays a role in radiating and guiding electromagnetic waves.

[0037] The main body ...

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Abstract

The invention provides a multi-band antenna free of a lumped parameter element for a high-screen ratio mobile terminal, and belongs to the technical field of broadband antennas for the mobile terminal. The multi-band antenna is characterized in that a monopole antenna of combining a drive branch and double-branch coupling ground branches is adopted; the multi-band antenna comprises an antenna main body, a dielectric plate, a microstrip feeder and a metal floor, wherein the antenna main body comprises the T-shaped drive branch and double-branch coupling parasitic ground branches; two 1 / 4 wavelength resonant modes are generated at a low band; full coverage of low-band LTE700, GSM850 and GSM900 and high-band DCS, PCS, UMTS, LTE2300 and LET2500 is achieved by combining a 3 / 4 wavelength mode of the drive branch and the 3 / 4 wavelength modes of long coupling parasitic ground branches and introducing a 1 / 4 wavelength resonant mode of the short coupling parasitic ground branch and tuning stubs; and the loss caused by the lumped parameter element is also omitted.

Description

technical field [0001] The invention belongs to the technical field of wide-band antennas for mobile terminals, and relates to a multi-band WWAN / LTE antenna that does not use lumped parameter elements and is suitable for mobile terminal equipment with a high screen-to-body ratio Background technique [0002] With the rapid development of wireless communication technology, the second generation mobile communication system (the second generation, 2G), the third generation mobile communication system (the third generation, 3G) and the fourth generation mobile communication system (the fourth generation, 4G) technology It has matured and been applied all over the world. Due to the communication needs of modern intelligent mobile terminals, broadband mobile terminal antennas, such as mobile phones, tablet computers, notebooks and other equipment, need to cover the global mobile communication system GSM850 (824-894MHz) and GSM900 (880-960MHz) of the 2G mobile communication system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q5/28H01Q5/10H01Q5/385H01Q1/36H01Q1/38H01Q1/48H01Q1/50
CPCH01Q1/36H01Q1/38H01Q1/48H01Q1/50H01Q5/10H01Q5/28H01Q5/385
Inventor 杜正伟唐润东
Owner TSINGHUA UNIV
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