TWM556415U - Dual antenna for smart phone - Google Patents

Abstract

This creation is about a dual antenna applied to a smart phone. The main reason is that the grounding element is designed on the reverse side of the substrate, and has a slotted design and a U-shaped path in the slot; the metal frame is perpendicularly connected to the grounding element. The outer edge of the substrate is divided by a slot, and the U-shaped metal frame of the metal frame has a gap between the first and second L-shaped metal frames; the first and second radiation units are respectively fed by the two feeding ends. Located on the front side of the substrate, the path spans the slot and is respectively connected to the first and second L-shaped metal frames, and each of the first and second radiating elements is short-circuited perpendicular to the substrate by a metal path; thereby, more effective The design area of the antenna is used to meet the needs of modern communication systems, and the influence of the metal frame on the antenna characteristics is overcome, so that the antenna can be effectively integrated with the surrounding environment of the mobile communication device, and at the same time, the operation can be adjusted in the low frequency band. It affects the characteristics of other frequency bands, and maintains good radiation characteristics in a wide range of operating frequency bands, and more practical performance characteristics in its overall implementation.

Description

Dual antenna for smart phones

This creation is about a dual antenna used in smart phones, especially a design area that can more effectively utilize the antenna to meet the needs of modern communication systems, and overcome the influence of the metal frame on the antenna characteristics, so that the antenna It can effectively integrate with the surrounding environment of the mobile communication device, and can adjust the operation in the low frequency band without affecting the characteristics of other frequency bands, and maintain good radiation characteristics in a wide range of operating frequency bands, and implement it in its entirety. An innovative dual-antenna designer for smart phones with enhanced utility features.

According to the era of popularization of mobile communication devices, the wireless transmission interface has been developed from the third generation [3G] mobile communication system, the fourth generation [4G] mobile communication system, and has now developed the fifth generation [5G] mobile communication system. The rate and capacity of sending and receiving information are constantly improving and improving.

Among them, the design of the mobile phone is designed to be fashionable and comfortable, and the low-profile antenna has a metal frame design as the primary consideration. The design of the mobile phone antenna, in addition to the use of the most basic frequency band, the design needs to meet the needs of consumers. The metal frame mobile phone has become the design condition of the mobile phone appearance, but the metal frame mechanism will make the antenna design space. Subject to very large restrictions. Under such conditions, how to achieve the space that does not affect the antenna characteristics and effectively use the mobile phone is a challenging design.

At present, many antenna designs are designed for operation in LTE, GSM, UMTS, and multi-band designs such as 3.5 GHz, and are applied to metal frames. For example, KL Wong et al. recently proposed "Low-" in Microwave and Optical Technology Letters. Profile Open-Slot Antenna With Three Branch Slots For Triple-Wideband LTE Operation in The Metal-Framed Smartphone", "Dual-Wideband U-Shape Open-Slot Antenna For The LTE Metal framed Tablet Computer", and IEEE Transactions on Antennas and Propagation "Triple-Wideband Open-Slot Antenna for the LTE Metal-Framed Tablet device" and "Metal Body-Integrated Open-End Slot-Antenna Designs for" by CK Chang et al. on IEEE Transactions on Antennas and Propagation Handset LTE Uses and other related literature.

However, although the above-mentioned antenna can achieve the expected function of operating in multiple frequency bands and applied to the metal frame, it is also found in its practical operation and use that the antennas are designed with slot antennas applied to the metal frame, but some antennas The design of the slot path is complicated, or the area size is still improved. Compared with the current design trend of the mobile phone antenna, the problem is to be overcome, so that the overall structural composition still exists. Room for improvement.

The reason is that the creators have in view of this, and have been rich in design and development and practical production experience of the relevant industries for many years, researching and improving the existing defects, and providing a dual antenna for smart phones, in order to achieve better practical value. Target person.

The main purpose of this creation is to provide a dual antenna for smart phones, which can more effectively utilize the design area of the antenna to meet the needs of modern communication systems, and overcome the influence of the metal frame on the antenna characteristics. The antenna can be effectively integrated with the surrounding environment of the mobile communication device, and can adjust the operation in the low frequency band without affecting the characteristics of other frequency bands, and can maintain good radiation characteristics in a wide operating frequency band, and in its entirety Those who use more practical and effective features are used.

The main purpose and effect of this creation applied to the dual antennas of smart phones are achieved by the following specific technical means:

The main structure comprises a substrate, a metal frame, a grounding element, a first radiation unit and a second radiation unit; wherein:

The substrate is provided with the metal frame on the outer edge thereof, and the grounding element and the first radiation unit and the second radiation unit are respectively disposed on the front and back sides of the substrate;

The metal frame includes a U-shaped metal frame, a first L-shaped metal frame, and a second L-shaped metal frame, respectively, the U-shaped metal frame, the first L-shaped metal frame and the second L-shaped metal frame respectively a circumferential gap is disposed on the outer edge of the substrate, and a first gap is formed between the U-shaped metal frame and the first L-shaped metal frame, and a first gap is formed between the U-shaped metal frame and the second L-shaped metal frame a second gap is formed between the first L-shaped metal frame and the second L-shaped metal frame;

The grounding member is vertically connected to the metal frame, and the first gap, the second gap, and the third gap corresponding to the metal frame are formed with slots, and two slots are formed in the slot. a U-shaped path connected to the grounding element;

The first radiating unit has a first feeding end formed at a starting end, the first feeding end is connected in series with the first capacitive element, and then connected to the grounding element via the first grounding end after the first inductive element is connected in parallel Forming a high-pass matching circuit, and the first radiating unit has a second capacitive element connected in series after the slot of the grounding element across the reverse side of the substrate, and then connecting the first radiating element to the metal frame at the terminal The first L-shaped metal frame forms a first end point;

The second radiating unit has a second feeding end at a starting end, the second feeding end is connected in parallel with the third capacitive element, and then connected to the grounding element via a second grounding end, and the second radiation a second inductive component is connected in series with the slot of the grounding component across the opposite side of the substrate, and the second radiating element is connected to the second L-shaped metal frame of the metal frame to form a second end ;

An antenna clearance area is formed on the reverse side of the substrate. The antenna clearance area includes at least the slot of the grounding element, the U-shaped path in the slot, the first radiating element and the second radiating element.

The present invention is applied to a dual antenna of a smart phone, wherein the grounding element and the first radiating unit and the second radiating unit are respectively printed, etched, sheet metal stamped, and cut. It is disposed on both sides of the substrate.

The present invention is applied to a dual antenna of a smart phone, wherein the width of the first gap, the second gap, and the third gap of the metal frame are both 2 mm.

The present invention is applied to a preferred embodiment of a dual antenna of a smart phone, wherein the second radiating element excites a first excitation mode, the first excitation mode being 930 MHz.

The present invention is applied to a dual antenna of a smart phone, wherein the first radiating unit increases the inductance of the overall frequency band by the U-shaped path on the slot of the grounding component, thereby The first radiating element is excited to generate a second excited mode, which is 1710 MHz.

The present invention is applied to a dual antenna of a smart phone, wherein the first radiating unit generates a frequency doubling mode near 3.5 GHz by connecting the first capacitive element in series and paralleling the first The inductive component extends to the high-pass matching circuit of the first ground terminal, and the mode is shifted to the low frequency to generate a third excitation mode, and the third excitation mode is 2690 MHz.

The present invention is applied to a dual antenna of a smart phone, wherein the first feeding end extension path of the first radiating unit is connected to the first end path of the first L-shaped metal frame The effect of the second capacitive element produces a fourth excitation mode, which is 3510 MHz.

The present invention is applied to a dual antenna of a smart phone. The change of the value of the second inductance component of the second radiation unit can adjust the operating frequency band of the low frequency, and the characteristics of the other frequency bands are not affected.

The present invention is applied to a preferred embodiment of a dual antenna of a smart phone, wherein the slot of the grounding element enables the first radiating element and the second radiating element to have good isolation.

In order to make the technical content, creative purpose and the effect achieved by this creation more complete and clear, please elaborate below, and please refer to the drawings and drawings:

First, please refer to the schematic diagram of the three-dimensional exploded structure of the first figure and the second enlarged view of the partial enlarged structure of the present creation. The present invention mainly includes a substrate (1), a metal frame (2), and a grounding component (3). a first radiation unit (4) and a second radiation unit (5); wherein:

The substrate (1) is a glass fiber dielectric substrate having a thickness of 0.8 mm, and the glass fiber dielectric substrate has a dielectric constant of 4.4, and the metal frame (2) is disposed on an outer edge of the substrate (1), and The grounding element (3) and the first radiation unit (4) and the second radiation unit (5) are respectively disposed on the front and back of the substrate (1) by printing, etching, sheet metal stamping or cutting. Two sides.

The metal frame (2) includes a U-shaped metal frame (21), a first L-shaped metal frame (22), and a second L-shaped metal frame (23), such that the U-shaped metal frame (21), the The first L-shaped metal frame (22) and the second L-shaped metal frame (23) are respectively circumferentially disposed on the outer edge of the substrate (1), and the U-shaped metal frame (21) and the first L-shaped metal frame (22) The second L-shaped metal frame (23) is a copper piece of 0.2 mm, and a first gap is formed between the U-shaped metal frame (21) and the first L-shaped metal frame (22). (24) a second gap (25) is formed between the U-shaped metal frame (21) and the second L-shaped metal frame (23), and the first L-shaped metal frame (22) and the second A third gap (26) is formed between the L-shaped metal frames (23), the distance between the first gap (24) and the second gap (25) is 70 mm, and the first gap (24) and the The relative distance between the third gap (26) is 32 mm, and the first A gap (24), the second gap (25), and the third gap (26) each have a width of 2 mm.

The grounding element (3) has an area of 137 × 70 mm ² , such that the grounding element (3) is vertically connected to the metal frame (2), and the grounding element (3) corresponds to the metal frame (2) The first gap (24), the second gap (25), and the third gap (26) are formed with a slot (31), and the two ends of the slot (31) are provided with the grounding component (3) Connected U-shaped path (32).

The first radiation unit (4) adopts a copper piece having a thickness of 0.02 mm, and the first radiation unit (4) forms a first feeding end (41) at the starting end, and the first feeding end (41) First connecting the first capacitive element (42), and then paralleling the first inductive element (43), connecting to the grounding element (3) via the first grounding terminal (44) to form a high-pass matching circuit, and the first a radiating unit (4) is connected in series with the slot (31) of the grounding element (3) opposite to the opposite side of the substrate (1) with a second capacitive element (45), and then the first radiating element (4) The first L-shaped metal frame (22) connected to the metal frame (2) at the terminal forms a first end point (46), and the first feeding end (41) to the first end point (46) The distance is 13 mm, and the distance from the first feed end (41) to the first ground end (44) is 8.5 mm.

The second radiation unit (5) adopts a copper piece having a thickness of 0.02 mm, and the second radiation unit (5) forms a second feeding end (51) at the starting end, and the second feeding end (51) Connecting the third capacitive element (52) in parallel, and then connecting to the grounding element (3) via a second grounding terminal (53), and the second radiating element (5) is across the opposite side of the substrate (1) The slot (31) of the grounding element (3) is followed by a second inductive component (54), and the second radiating element (5) is connected to the second L-shaped end of the metal frame (2). The metal frame (23) forms a second end point (55), and the second feed end (51) to the second end point (55) has a distance of 13 mm, and the second feed end (51) The second ground terminal (53) has a distance of 8 mm.

In addition, an antenna clearance area (6) is formed on the reverse side of the substrate (1), and the antenna clearance area (6) includes at least the slot (31) of the grounding element (3), and the slot in the slot (31) U-shaped path (32), the first radiation unit (4) and the second radiation unit (5).

In this way, the present invention can be applied to the WWAN/LTE seven-band and 3.5 GHz LTE bands, and the first radiating unit (4) and the first portion are made by the slot (31) of the grounding element (3). The two radiation unit (5) has good isolation; please refer to the third radiation loss return map of the present invention and the second radiation unit return loss diagram of the fourth drawing. The reflection loss specifications of the first radiation unit (4) and the second radiation unit (5) are both defined as 5 dB, and the high frequency portion of the operating frequency range of the first radiation unit (4) is between 1480 and 3947 MHz. The operating bandwidth is 2467 MHz, and the operating frequency range of the second radiating element (5) is 876-981 MHz, and the operating bandwidth is 105 MHz. Please refer to the fifth figure for the isolation of the creation. As shown in the graph, the isolation between the two antennas in each frequency band [│S ₁₂ │] is less than 20 dB. The bandwidth of this authoring operation can cover GSM 900 [880-960 MHz], GSM1800/1900/UMTS/LTE2300/2500 [1710-2690 MHz] and 3.5 GHz [3400-3600 MHz] bands.

When the signal is respectively entered by the first feeding end (41) of the first radiating unit (4) and the second feeding end (51) of the second radiating unit (5), four signals are generated. Modalities:

a first excitation mode 930 MHz: excited by the second radiation unit (5), the third capacitance element (52) is first connected in parallel by the second feed end (51), and the second ground end is further connected via the second ground end a point (53) is connected to the grounding element (3), and the second radiating element (5) is connected in series to the slot (31) of the grounding element (3) across the opposite side of the substrate (1). An inductive component (54), and the second radiating element (5) is connected at the terminal to the second end point (55) of the second L-shaped metal frame (23) of the metal frame (2) to generate Excited mode

a second excitation mode 1710 MHz: by the U-shaped path (32) on the slot (31) of the grounding element (3), the inductance value of the overall frequency band is increased, and the first radiation unit is further 4) excitation, producing a second mode;

The third excitation mode 2690 MHz: firstly, the first radiation unit (4) is generated in a frequency doubling mode near 3.5 GHz, by connecting the first capacitive element (42) in series, and paralleling the first inductance element (43) extending to the high-pass matching circuit of the first ground terminal (44) to shift the mode to a low frequency;

a fourth excitation mode 3510 MHz: an extension path of the first feeding end (41) of the first radiation unit (4) is connected to the first end point of the first L-shaped metal frame (22) (46) The effect of the second capacitive element (45) on the path produces an excitation mode.

Please refer to the antenna gain diagram of the present figure and the antenna efficiency diagram of the seventh figure. The preferred embodiment of the present invention operates at a low frequency GSM 900 with an antenna gain of 0-0.8 dBi. And the antenna efficiency is 45.05-54.22%, while the antenna gain is between 0-3.75 dBi when operating in the mid-high band GSM1800/1900/UMTS/LTE2300/2500 [1710-2690 MHz] and 3.5 GHz [3400-3600 MHz]. And the antenna efficiency is 41.44-80.32%. Please refer to the return loss diagram of the frequency band switching part of the eighth picture as shown in the eighth figure. The value of the second inductance element (54) of the second radiation unit (5) can be adjusted to adjust the low frequency. The operating band is switched from 13 nH [876-981 MHz] covering GSM 900 to 15 nH [823-937 MHz] covering GSM 850, and the characteristics of other bands are not affected.

From the above, the composition and use of the creation structure can be seen that this creation has the following advantages compared with the existing structure:

1. The design of the first radiation unit, the second radiation unit and the slotted path enables the antenna to be more effectively utilized to meet the needs of modern communication systems.

2. This creation overcomes the influence of the metal frame on the antenna characteristics, so that the antenna can be effectively integrated with the surrounding environment of the mobile communication device.

3. This creation can adjust the operation in the low frequency band without affecting the characteristics of other frequency bands.

4. This creation is based on various experimental measurements and can maintain good emission characteristics in a wide range of operating bands.

The above-mentioned embodiments or drawings are not intended to limit the structure of the present invention, and any suitable variations or modifications of those skilled in the art should be considered as not departing from the scope of the invention.

In summary, the present embodiment can achieve the expected use efficiency, and the specific structure disclosed is not only found in similar products, nor has it been disclosed before the application, and has fully complied with the requirements and requirements of the Patent Law.爰Proposing an application for a new type of patent in accordance with the law, and pleading for a review and granting a patent, it is really sensible.

(1) ‧‧‧Substrate

(2)‧‧‧Metal border

(21)‧‧‧U-shaped metal frame

(22)‧‧‧First L-shaped metal frame

(23)‧‧‧Second L-shaped metal frame

(24) ‧‧‧First gap

(25) ‧‧‧Second gap

(26) ‧‧‧ third gap

(3)‧‧‧ Grounding components

(31)‧‧‧ slotting

(32)‧‧‧U-path

(4) ‧‧‧first radiation unit

(41)‧‧‧First feed end

(42)‧‧‧First capacitive element

(43)‧‧‧First Inductive Components

(44)‧‧‧First ground terminal

(45)‧‧‧Second capacitive element

(46)‧‧‧First endpoint

(5) ‧‧‧second radiation unit

(51) ‧‧‧second feed end

(52)‧‧‧ Third capacitive element

(53)‧‧‧Second ground terminal

(54) ‧‧‧second inductance component

(55)‧‧‧second endpoint

(6)‧‧‧Antenna clearing area

The first picture: a schematic diagram of the three-dimensional decomposition structure of the creation.

The second picture: a schematic diagram of the partial enlarged combination structure of the present creation.

The third picture: the first radiation unit of this creation returns the loss map.

The fourth picture: the second radiation unit return loss map of this creation.

Figure 5: Isolation map of this creation.

Figure 6: Antenna gain graph for this creation.

Figure 7: Antenna efficiency map of this creation.

Figure 8: Return loss map of the band switching part of this creation.

Claims (9)

A dual antenna for a smart phone, which mainly comprises a substrate, a metal frame, a grounding element, a first radiation unit and a second radiation unit; wherein: the substrate has the metal frame on the outer edge thereof, and The grounding element and the first radiation unit and the second radiation unit are respectively disposed on the front and back sides of the substrate; the metal frame respectively includes a U-shaped metal frame, a first L-shaped metal frame, and a second L a metal frame, the U-shaped metal frame, the first L-shaped metal frame and the second L-shaped metal frame are respectively circumferentially coupled to the outer edge of the substrate, and the U-shaped metal frame and the first L-shaped metal frame A first gap is formed between the U-shaped metal frame and the second L-shaped metal frame, and a second gap is formed between the first L-shaped metal frame and the second L-shaped metal frame. a third gap; the grounding element is perpendicularly connected to the metal frame, and the first gap, the second gap, and the third gap corresponding to the metal frame are formed with a slot in the slot Both ends are provided with the grounding element a first U-shaped path; the first radiating unit has a first feeding end at a starting end, the first feeding end is connected in series with the first capacitive element, and then connected in parallel with the first inductive element, via the first ground An end point is connected to the grounding element to form a high-pass matching circuit, and the first radiating unit has a second capacitive element connected in series after the slot of the grounding element across the opposite side of the substrate, and the first radiating element is further The first L-shaped metal frame connected to the metal frame at the terminal forms a first end point; the second radiation unit forms a second feed end at the start end, and the second feed end is connected in parallel with the third capacitor The component is connected to the grounding component via a second grounding terminal, and the second radiating element has a second inductive component connected in series with the slot of the grounding component across the opposite side of the substrate, and then the second radiating element The second L-shaped metal frame connected to the metal frame at the terminal forms a second end point; and an antenna clearance area is formed on the reverse side of the substrate, the antenna clearance area includes at least the slot of the grounding element, the slotting The U-shaped path inside The first radiating unit and the second radiating unit. The dual antenna applied to the smart phone according to claim 1, wherein the grounding element and the first radiating unit and the second radiating unit are printed, etched, sheet metal stamped, and cut. The modes are respectively disposed on the front and back sides of the substrate. The dual antenna applied to the smart phone according to the first aspect of the invention, wherein the first gap, the second gap, and the third gap of the metal frame are both 2 mm wide. The dual antenna applied to the smart phone according to claim 1, wherein the second radiating element excites a first excitation mode, and the first excitation mode is 930 MHz. The dual antenna applied to the smart phone according to the first aspect of the patent application, wherein the first radiating unit increases the inductance of the overall frequency band by the U-shaped path on the slot of the grounding component, Further excited by the first radiation unit to generate a second excitation mode, the second excitation mode is 1710 MHz. The dual antenna applied to the smart phone according to the first aspect of the patent application, wherein the first radiating unit generates a frequency doubling mode near 3.5 GHz by connecting the first capacitive element in series, and paralleling the The first inductive component extends to the high-pass matching circuit of the first ground terminal, and the mode is shifted to the low frequency to generate a third excitation mode, and the third excitation mode is 2690 MHz. The dual antenna applied to the smart phone according to the first aspect of the invention, wherein the first feeding end extension path of the first radiation unit is connected to the first end of the first L-shaped metal frame The effect of the second capacitive element on the path produces a fourth excitation mode, which is 3510 MHz. The dual antenna applied to the smart phone according to the first aspect of the patent application, wherein the change of the value of the second inductance component of the second radiation unit can adjust the operating frequency band of the low frequency, and the characteristics of the other frequency bands are not affected. influences. The dual antenna for use in a smart phone as described in claim 1, wherein the slot of the grounding element enables the first radiating element and the second radiating element to have good isolation.