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Antenna tuning circuit, antenna device and mobile terminal

An antenna tuning and circuit technology, applied in the electronic field, can solve problems such as excessive stray

Active Publication Date: 2018-06-01
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the third harmonic energy of the radio frequency signal reaches the third resonance of the antenna, these useless harmonic energy will be radiated out, resulting in excessive spurious

Method used

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  • Antenna tuning circuit, antenna device and mobile terminal
  • Antenna tuning circuit, antenna device and mobile terminal
  • Antenna tuning circuit, antenna device and mobile terminal

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] The terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For exam...

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Abstract

The application discloses an antenna tuning circuit and a mobile terminal. The antenna tuning circuit includes an antenna, a first matching circuit, a second matching circuit, a first switch, a secondswitch, and a radio frequency signal transceiver. The antenna includes a first feed point, a second feed point, and a third feed point that are arranged in sequence. The first matching circuit and the first switch are connected in series between the first feed point and the ground. The second matching circuit and the second switch are connected in series between the second feed point and the ground. When the operating frequency band is at a low frequency, a radio frequency signal transmitted by the radio frequency signal transceiver is transmitted to an antenna radiator through the third feedpoint. Both the first switch and the second switch are turned on. The frequency band in the third frequency range is smaller than the frequency band in the second frequency range. With the embodiments of the application, the radiation spurious emission can be suppressed.

Description

technical field [0001] The present application relates to the field of electronic technology, and in particular to an antenna tuning circuit, an antenna device and a mobile terminal. Background technique [0002] As a mandatory certification indicator for current electronic equipment (such as smart phones, etc.), radiation spurious is the most complicated and difficult problem among all certifications. Especially in the Global System for Mobile Communication (GSM) frequency band, because the power of GSM itself is high, it is easy to excite strong energy in an instant, resulting in excessive radiation of spurious harmonics. In actual engineering, it is mainly the third harmonic of GSM900, the second harmonic of GSM1800 or the third harmonic of GSM1800 exceeds the standard. [0003] For radio frequency signals, the signal we transmit will not only contain usable signals (such as GSM900), but also often contain components of the second harmonic (such as 1800GHz) or the third ...

Claims

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Application Information

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IPC IPC(8): H01Q1/50H01Q5/28H01Q5/328H01Q5/35H01Q23/00H01Q1/24H01Q1/22
CPCH01Q1/22H01Q1/243H01Q1/50H01Q5/28H01Q5/328H01Q5/35H01Q23/00
Inventor 杨怀
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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