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Mobile terminal

A mobile terminal and pin technology, applied in the directions of antenna support/installation device, independent antenna unit combination, etc., can solve the problems of large internal space of mobile terminals, unfavorable design of thin and light mobile terminals, etc., to shorten the development cycle, reduce Development cost and simple circuit structure

Active Publication Date: 2013-01-30
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the existing CMMB antenna design method occupies a large internal space of the mobile terminal and is not conducive to the design of the thin and light mobile terminal, the present invention proposes a mobile terminal that uses the earphone socket to plug the CMMB antenna, and realizes the sharing of the CMMB antenna and the FM antenna The structural design of the headphone socket simplifies the design difficulty

Method used

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Embodiment 1

[0037] Embodiment one, the radio frequency antenna of the present embodiment shares the design scheme of the earphone socket, selects the microphone pin 1 of the earphone socket or the floating pin 2 opposite to the position of the microphone pin 1 to connect the CMMB antenna feed point on the mobile phone circuit board, select The ground pin 4 of the earphone socket is connected to the FM antenna feed point on the mobile phone circuit board, see figure 1 As shown, the mobile phone circuit thus designed, by multiplexing the CMMB channel with the internal microphone channel of the mobile phone, and multiplexing the FM channel with the earphone ground channel, can well avoid the mutual influence between the two radio frequency signals and reduce the radio frequency Difficulty debugging performance.

[0038] In this embodiment, the earphone jack can be set on the host of the mobile phone by selecting an ordinary six-pin earphone jack, specifically including a microphone pin 1, a ...

Embodiment 2

[0055] Embodiment two, the design scheme that the FM antenna of the present embodiment and the CMMB antenna share the earphone socket, select the left channel pin 5 of the earphone socket U1 or the right channel pin 3 to connect the FM antenna feed point, select the grounding of the earphone socket U1 Pin 4 is connected to the CMMB antenna feed point. By multiplexing the FM channel with the left and right channel channels of the earphone, and the multiplexing of the CMMB channel with the ground channel of the earphone, the mutual influence between the two RF signals can also be well avoided, and the difficulty of debugging the RF performance can be reduced.

[0056] When the path multiplexing design method proposed in this embodiment is adopted, in order to meet the normal transmission requirements of earphone signals, FM signals and CMMB signals, this embodiment firstly cuts off the CMMB antenna feed point by completely cutting off the FM signal and completely cutting off the ...

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Abstract

The invention discloses a mobile terminal, which comprises a host machine, an earphone and a CMMB (China Mobile Multimedia Broadcasting) antenna, wherein an earphone socket for plugging the earphone and the CMMB antenna is arranged on the host machine; the earphone is also used as an FM (Frequency Modulation) antenna; in the earphone socket, a microphone pin or a suspended pin opposite to the microphone pin is connected with a CMMB antenna feed point on a circuit board, and the CMMB antenna feed point is connected with a CMMB chip through a high-pass filter for completely picking off an FM signal and completely breaking over a CMMB signal; the microphone pin is connected with a microphone path through series-connected magnetic beads; and the magnetic beads have a characteristic of picking-off on a CMMB signal working frequency range. The design scheme of a radio frequency antenna sharing the earphone socket adopts the design that two radio frequency paths are separated, so that the problem of mutual influence during debugging antenna match is reduced, the design difficulty of a system is reduced, the circuit structure is simpler, the development cost is reduced, and the development period is shortened.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a structural design of an earphone socket of a mobile terminal, through which the compatible insertion of a radio frequency antenna is realized. Background technique [0002] CMMB (China Mobile Mutimedia Broadcasting) is the first system oriented to multiple mobile terminals independently developed in China and managed by the State Administration of Radio, Film and Television. It utilizes S-band satellite signals to achieve integrated coverage of "heaven and earth" and nationwide roaming , Support 25 sets of TV programs and 30 sets of radio programs. CMMB is mainly oriented to small-screen handheld terminal devices. Its terminal products mainly include MP4, mobile phones, GPS, USB receiver sticks, independent receivers, etc., providing digital broadcasting and TV programs, comprehensive information and emergency broadcasting services, and realizing sate...

Claims

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Application Information

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IPC IPC(8): H01Q1/22H01Q21/30
Inventor 褚宏资王国涛
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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