For the closed becket frame dual-band antenna of mobile wearable device
Technical field
The present invention relates to a kind of wireless communication field, particularly a kind of closed becket frame dual-band antenna for mobile wearable device.
Background technology
In recent years, the quantity of intelligent movable wearable device presents explosive growth.The wrist-wearable device function being integrated with various different sensors also gets more and more.Waist watch type mobile phone, as one of them large class, has the Waist watch type mobile phone of metal-like because fashionable appearance is also more subject to user's welcome.But the existence of metal shell seriously can reduce antenna radiation performance.Traditional Antenna Design has been difficult to meet its performance requirement.
In order to eliminate the impact of metal edge frame on aerial signal, in Cell Phone Design industry, metal edge frame cracks by general selection, using the part participation radiation of metal edge frame as antenna.But this way defectiveness: is crack to destroy the aesthetic feeling of overall appearance; Two is to cause antenna performance sharply to worsen when people holds gap position.This way is not obviously suitable for the little Waist watch type mobile phone of volume.
Summary of the invention
The present invention carries out to solve the problem, and object is that providing a kind of reduces repeated work, improves the Fast design method of designed reliability.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, has such feature, comprising: pcb board; Becket frame, in closing structure, is looped around around pcb board, and between pcb board between be separated with preset distance; And antenna element, be arranged on the side of becket frame, wherein, pcb board, has: wired circuit region; Without wiring empty regions, be arranged on the edge of pcb board near antenna element, adjacent with wired circuit region; And feeder line power supply, be distributed in wired circuit region and the border without the empty regions that connects up, antenna element, has: feed cabling, and one end is connected with feeder line power supply, and the other end is connected with becket frame.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also has such feature: wherein, pcb board, in rectangular, becket frame, in cuboid closing structure, have: the first frame, perpendicular to pcb board, be arranged on the side without wiring empty regions; Second frame, perpendicular to pcb board, is arranged on the side of the first frame, vertical with the first frame; 3rd frame, perpendicular to pcb board, is arranged on the offside of the first frame; And the 4th frame, perpendicular to pcb board, be arranged on the opposite side of the first frame, vertical with the second frame, first frame, the second frame, the 3rd frame and the 4th frame join end to end respectively successively, and form closing structure, the end face of becket frame and bottom surface are not exclusively closed.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also have such feature: wherein, preset distance is 2mm.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also has such feature: wherein, and the width without wiring empty regions is 5mm.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also there is such feature: wherein, wired circuit region and the 4th frame are provided with the first grounding connection point, wired circuit region and the 3rd frame are provided with the second grounding connection point, and wired circuit region and the second frame are provided with the 3rd grounding connection point.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also has such feature: wherein, and feeder line power supply moves left and right in wired circuit region and the border without the empty regions that connects up.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also has such feature: wherein, antenna element, also has: the first expansion Department of Radiation, is arranged on becket frame.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also have such feature: wherein, antenna element, also have: reactance component, one end and first is expanded Department of Radiation and is connected; And second expands Department of Radiation, is connected with the other end of reactance component.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also there is such feature: wherein, antenna element, also have: parasitic radiation portion, top is connected with the border without the empty regions that connects up with wired circuit region, and terminal is connected with becket frame.
Closed becket frame dual-band antenna for mobile wearable device provided by the invention, also has such feature: wherein, and parasitic radiation portion adopts L-type bending mode cabling, end and the parallel cabling of the first frame.
Invention effect
According to the closed becket frame dual-band antenna for mobile wearable device involved in the present invention, by directly powering to becket frame, utilize becket frame as a part for antenna, without the need to becket frame fluting, the problem that contact human skin causes aerial signal acute variation effectively can be solved under maintenance product appearance prerequisite.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's closed becket frame dual-band antenna for mobile wearable device in an embodiment; And
Fig. 2 is the waveform schematic diagram of the present invention's return loss in an embodiment.
Embodiment
Referring to drawings and Examples, the closed becket frame dual-band antenna for mobile wearable device involved in the present invention is explained in detail.
The closed becket frame for mobile wearable device in the present embodiment is used for Waist watch type mobile phone.
Fig. 1 is the structural representation of the present invention's closed becket frame dual-band antenna for mobile wearable device in an embodiment.
As shown in Figure 1, the closed becket frame dual-band antenna for mobile wearable device has: pcb board 1, becket frame 2 and antenna element 3.
Pcb board 1 is rectangle, and has: wired circuit region 1-1, nothing wiring empty regions 1-2 and feeder line power supply 1-3.
Wired circuit region 1-1 is disposed adjacent with without the empty regions 1-2 that connects up, even rectangle design.Wired circuit region 1-1 is used for the wiring of circuit.Be disposed adjacent at the edge of pcb board 1 upper side edge without wiring empty regions 1-2, width is 5mm.
Feeder line power supply 1-3 is distributed in wired circuit region 1-1 and the border without the empty regions 1-2 that connects up, and can move left and right at wired circuit region 1-1 and the border without the empty regions 1-2 that connects up.
Becket frame 2 is in closing structure, and be separated with preset distance between being looped around between the surrounding of pcb board and pcb board, the preset distance in the present embodiment is 2mm.Becket frame 2 in the present embodiment, in cuboid, has: the first frame 2-1, the second frame 2-2, the 3rd frame 2-3 and the 4th frame 2-4.
The height of the first frame 2-1 is 8mm, perpendicular to the right edge of pcb board 1, is arranged on the side without wiring empty regions 1-2.
The height of the second frame 2-2 is 8mm, perpendicular to the upper side edge of pcb board 1, is arranged on the side of the first frame 2-1, vertical with the first frame 2-1.
The height of the 3rd frame 2-3 is 8mm, perpendicular to the limit, left side of pcb board 1, is arranged on the offside of the first frame 2-1, parallel with the first frame 2-1.
The height of the 4th frame 2-4 is 8mm, perpendicular to the lower side of pcb board 1, is arranged on the opposite side of the first frame 2-1, vertical with the second frame 2-2.
First frame 2-1, the second frame 2-2, the 3rd frame 2-3 and the 4th frame 2-4 join end to end respectively successively, form closing structure.The end face of becket frame 2 and bottom surface are not exclusively closed, and end face is for placing the display screen of Waist watch type mobile phone, and the function sensor of Waist watch type mobile phone is placed in bottom surface.
Wired circuit region 1-1 and the 4th frame 2-4 is provided with the first grounding connection point 4, wired circuit region 1-1 and the 3rd frame establishes 2-3 to be equipped with the second grounding connection point 5, wired circuit region 1-1 and the second frame 2-2 is provided with the 3rd grounding connection point 6.First grounding connection point 4, second grounding connection point 5 has electrical fitting to be connected with becket frame 2 by pcb board 1 with the 3rd grounding connection point 6 tie point respectively.
Antenna element 3 is arranged on the first frame 2-1 side of becket frame 2, has: feed cabling 3-1, the first expansion Department of Radiation 3-2, reactance component 3-3, the second expansion Department of Radiation 3-4 and parasitic radiation portion 3-5.
Feed cabling 3-1 one end is connected with feeder line power supply 1-3, and the other end is connected with the first frame 2-1 of becket frame 2, is electrically connected by feeder line power supply 1-3 and the first frame 2-1.Electric connecting point on first frame 2-1 forms the first current circuit to the first grounding connection point 4 on the 4th frame 2-4, forms the second current circuit to the 3rd grounding connection point 6 on Second Edge 2-2.Thus produce two fundamental resonances of antenna, by adjusting grounding connection point position on each frame, resonance frequency can be regulated respectively.
First expansion Department of Radiation 3-2 is arranged on the first frame 2-1 of becket frame 2, and low frequency bandwidth is widened by the horizontal bending branch of employing.Because Waist watch type mobile phone inner space is compact, if the first expansion radiant section 3-2 length is inadequate, radiant section 3-4 can be expanded by series reactance elements 3-3 and second and be connected.Reactance component 3-3 in the present embodiment selects inductance element.One end and first of reactance component 3-3 is expanded Department of Radiation 3-2 and is connected.Second expansion Department of Radiation 3-4 is connected with the other end of reactance component 3-3.
3-5 top, parasitic radiation portion is connected with the border without the empty regions 1-2 that connects up with wired circuit region 1-1, and terminal is connected with the first frame 2-1 of becket frame 2.Parasitic radiation portion 3-5 adopts L-type bending mode cabling, and end and the parallel cabling of the first frame 2-1, for widening high frequency bandwidth.
In addition, electrical connection can select the thimble way of contact or the shell fragment way of contact.Grounding connection point can also increase screws contact mode.Do not affecting under the reliable prerequisite of structure, fully ensureing to connect effect.
Fig. 2 is the waveform schematic diagram of the present invention's return loss in an embodiment.
As shown in Figure 2, low frequency 1561MHz ~ 1605MHz, high frequency 2400MHz ~ 2500MHz, return wave loss parameter all reaches below-7dB, meets the actual requirement used completely.
The effect of embodiment and effect
For the closed becket frame dual-band antenna of mobile wearable device involved by the present embodiment, by directly powering to becket frame, utilize becket frame as a part for antenna, without the need to becket frame fluting, the problem that contact human skin causes aerial signal acute variation effectively can be solved under maintenance product appearance prerequisite.
Above-mentioned execution mode is preferred case of the present invention, is not used for limiting the scope of the invention.