CN1172514C - Hidden antenna gain enhancing device for folding mobile phone - Google Patents

Abstract

The invention provides a hidden antenna gain enhancing device of a folding mobile phone, which comprises a first shell and a second shell which is pivoted with the first shell and can be folded and lifted relative to the first shell, wherein a circuit board and a hidden antenna electrically connected with the circuit board are arranged in the second shell, and particularly, a flexible metal sheet which is electrically connected or coupled with the hidden antenna is arranged below the position, close to the pivoting position of the first shell and the second shell, of the circuit board, the metal sheet extends from the lower part of the circuit board to the inside of the first shell, and the extending length of the metal sheet just meets the resonance requirement of the hidden antenna.

Description

Concealed Antenna Gain Booster for Foldable Mobile Phones

Technical field

The invention relates to a hidden antenna gain enhancing device of a foldable mobile phone, in particular to a foldable mobile phone which can effectively improve the radiation intensity of the antenna.

Background technique

As shown in Figure 1, it is a kind of traditional foldable mobile phone 1 with hidden antenna, which mainly includes a first casing 11 with a display screen 111 and a sound output part 112 and a first casing 11 that can be opposite to the first casing 11. The second housing 12 that is folded and folded is provided with a keyboard 121 and a microphone 122 on the surface of the second housing 12, and a circuit board 13 for laying out circuits and a circuit board 13 located on the circuit board 12 are provided inside it. Close to the hidden antenna 14 below the pivot end of the second housing 12 . And because the ground plane length of the general mobile phone antenna must be at least 1/3~1/4 wavelength, the radiation intensity of the antenna can be effectively displayed, and today's foldable mobile phone 1 is designed to achieve the appeal of thin, light, small and beautiful. The hidden antenna hidden inside the mobile phone, but since the length of the foldable mobile phone 1 after folding is only 60-70 mm, the hidden antenna 14 installed in the mobile phone is a low-frequency antenna that uses the GSM900 system to send and receive 900MHz carrier signals , since the wavelength of the carrier signal is about 33.3 centimeters, the length of the ground plane of the hidden antenna 14 must be at least 8.3 to 11.1 centimeters to achieve the above-mentioned radiation intensity, but the folded length is only 6 to 7 centimeters As far as the mobile phone 1 is concerned, the ground plane of the hidden antenna 14 is fundamentally insufficient, so that the radiation intensity of the hidden antenna 14 is insufficient to be effectively displayed, and the communication effect of the foldable mobile phone 1 is affected to a certain extent.

Contents of the invention

Therefore, the object of the present invention is to provide a hidden antenna gain enhancing device for a foldable mobile phone that can effectively improve the radiation intensity of the antenna.

Therefore, the concealed antenna gain enhancement device for a foldable mobile phone of the present invention includes a first housing with a display screen and a side that is pivotally connected to the first housing so that it can be opposed to the first housing. The second casing is folded and closed, and a circuit board and a hidden antenna electrically connected with the circuit board are arranged inside the second casing. In particular, a flexible thin metal plate that is electrically connected to the concealed antenna in a coupling or direct contact manner is provided below the circuit board near the pivotal end of the second housing, and the metal thin plate is formed by the circuit board The bottom extends to the inside of the first housing, and the extended length of the metal sheet just meets the resonance requirements of the hidden antenna, so that the current direction of the same phase as that of the circuit board can be excited on the metal sheet to effectively improve the hidden antenna. gain and radiation intensity.

Description of drawings

Other features and advantages of the present invention will be clearly understood in the following detailed description of the preferred embodiment with reference to the drawings, in the drawings:

FIG. 1 is a schematic side view of a traditional foldable mobile phone with a hidden antenna in an unfolded state;

Fig. 2 is a schematic side view of the unfolded state of the foldable mobile phone in a preferred embodiment of the concealed antenna gain enhancing device of the foldable mobile phone of the present invention; and

FIG. 3 is a schematic side view of the foldable mobile phone in FIG. 2 in a closed state.

Component designation comparison

2 Foldable mobile phone 21 The first shell

22 Second housing 23 Concealed antenna

24 sheet metal 211 display screen

212 sound output unit 221 key keyboard

222 sound input unit 223 circuit board

Detailed ways

Referring to Fig. 2, it is a preferred embodiment of the concealed antenna gain enhancing device of the foldable mobile phone of the present invention, the foldable mobile phone 2 includes a first casing 21 and a second casing 22, and the first casing The body 21 and the second casing 22 are pivotally connected by a pivot member 20 on one side, and are in a use state that can be opened in opposite directions or folded in half relatively. Wherein, the surface of the first housing 21 is provided with a display screen 211 and a sound output part (i.e. earpiece) 212, and the surface of the second housing 22 is provided with a keypad 221 and a sound input part (i.e. microphone) 222, and A circuit board 223 is arranged inside the second housing 22 , so that the keypad 221 and audio digital/analog conversion circuits (not shown) can be arranged on the circuit board 223 . In addition, a hidden antenna 23 electrically connected to the circuit board 223 is provided inside the second casing 22, and in order to avoid the capacitive effect generated when the first casing 21 and the second casing 22 are relatively covered. Therefore, the hidden antenna 23 is located at the bottom of the second housing 22 and is located below the circuit board 223 near the pivotal end of the second housing 22 . And because the length of the foldable mobile phone on the market after folding is only 60～70mm (being 6～7 centimetres), therefore suppose that this concealed antenna 23 is a low-frequency antenna that sends and receives 900MHz low-frequency carrier signal, and the wavelength of this carrier signal is long up to 33.3 centimeters, so if the radiation intensity of the hidden antenna 23 is to be effectively displayed, the length of the ground plane of the hidden antenna 23 must be at least 1/3 to 1/4 wavelength (i.e. 11.1 to 8.3 centimeters), However, the length of the current foldable mobile phone obviously cannot meet this requirement, so that when the hidden antenna is used as a low-frequency antenna, the gain will be reduced, resulting in a serious shortage of radiation intensity. Therefore, the present invention provides a gain enhancing device for enhancing the hidden antenna to make up for and solve the problem of insufficient ground plane of the hidden antenna of the foldable mobile phone. Therefore, the feature of the present invention is that, below the circuit board 223, between the circuit board 223 and the hidden antenna 23, a device is provided with the hidden antenna 23 in a coupling (coupling) or direct contact (loading) mode. The flexible metal sheet 24 is electrically connected, and the extended length of the metal sheet 24 just meets the resonance requirement of the hidden antenna 23, that is, the length of the metal sheet 24 is the resonance wavelength of the transmitted carrier signal. In addition, as shown in FIG. 3 , since the metal thin plate 24 is flexible and fairly elastic, even when the foldable mobile phone 2 is folded and closed, it can be bent along the bending direction without breaking easily.

Therefore, as shown in Figure 2, when the first housing 21 of the foldable mobile phone 2 was opened relative to the second housing 22, the total length of the hidden antenna 23 plus the length of the metal sheet 24 was approximately at the hidden The 1/4 wavelength of the carrier wave transmitted in the concealed antenna 23 makes the current in phase with the circuit board 223 can be excited on the thin metal plate 24, thereby effectively improving the gain and radiation intensity of the signal transmitted in the concealed antenna 23.

Of course, the thin metal plate used in the present invention is not limited to low-frequency or high-frequency hidden antennas, and the present invention can be applied to any hidden antennas in foldable mobile phones.

To sum up, the present invention provides an electrical connection with the hidden antenna 23 under the circuit board 223 in the second housing 22 of the foldable mobile phone 2 and extends close to the pivotal end of the second housing 22. to the flexible metal sheet 24 inside the first housing 21, and the length of the proper extension of the metal sheet 24 is used to compensate for the insufficient ground plane of the hidden antenna 23, so that the circuit board can be excited on the metal sheet 24 223 in-phase current, thereby improving the gain and radiation intensity of the hidden antenna 23, so that although the radiation intensity of the hidden antenna 23 inside the mobile phone is only 60-70mm after folding, it can still be effectively displayed without being affected by the mobile phone. It solves the problem of insufficient ground plane of the low-frequency antenna in the hidden antenna of the general folding mobile phone, and indeed improves the problem of insufficient radiation intensity of the hidden antenna of the traditional folding mobile phone.

The above are only preferred embodiments of the present invention, and cannot limit the scope of the present invention with this. That is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the description of the invention should still belong to the present invention. covered by the patent.

Claims (4)

1. the concealed antenna of clamshell phone gain intensifier, this clamshell phone comprises one to have first housing of a display screen and is articulated with this first housing and can relative first housing folds and lift second housing that closes with a side, and be provided with a circuit board and one and the concealed antenna that electrically connects of this circuit board in this second enclosure interior, it is characterized in that:

This circuit board near first housing and the second housing articulated section below more be provided with one with the flexible metal thin plate of this concealed antenna electric connection, and this sheet metal is to extend to this first enclosure interior by this circuit board below, and the length that this sheet metal extended just meets the resonance requirement of this concealed antenna.

2. the concealed antenna of clamshell phone according to claim 1 gain intensifier, wherein this concealed antenna is to be located at this first housing bottom and the below near first housing and the second housing articulated section that is positioned at this circuit board, and the resonance of this concealed antenna requires to be meant that length that this sheet metal extends is for transmitting the resonance wavelength of carrier signal in this concealed antenna.

3. the concealed antenna of clamshell phone according to claim 1 gain intensifier, wherein this concealed antenna can be a low-frequency antenna.

4. the concealed antenna of clamshell phone according to claim 1 gain intensifier, wherein this concealed antenna can be a high frequency antenna.

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