CN112448154A - Communication device - Google Patents
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- CN112448154A CN112448154A CN201910836571.1A CN201910836571A CN112448154A CN 112448154 A CN112448154 A CN 112448154A CN 201910836571 A CN201910836571 A CN 201910836571A CN 112448154 A CN112448154 A CN 112448154A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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Abstract
The invention provides a communication device which comprises a grounding surface and an antenna element. The antenna element comprises a first radiation part and a second radiation part. The first radiating part comprises a meandering section and a rectangular metal section. The serpentine section has a square hook-shaped structure. A feed-in point is arranged at a first end of the meandering section, and a second end of the meandering section is electrically connected to the rectangular metal section. The second radiation part has an L-shaped structure. A first end of the second radiating part is electrically connected to the ground plane. A first parallel slot is formed between a first end of the rectangular metal section and a second end of the second radiating portion. The communication device operates in a second frequency band through the first radiation part, and operates in a first frequency band through the first radiation part and the second radiation part.
Description
Technical Field
The present disclosure relates to electronic devices, and particularly to a communication device.
Background
With the development of wireless communication technology, consumer demands for wireless communication quality or functionality are gradually increasing. In order to support various communication functions or meet the requirement of communication quality, the conventional wireless communication device needs to be provided with a plurality of antennas, which is not favorable for miniaturization. Furthermore, with the conventional antenna structure, the size of the antenna is mainly determined by its operating frequency. Once the operating band is extended, the size of the antenna must be increased, which hinders size miniaturization. On the other hand, the built-in antenna has a design trend based on the consideration of visual appearance or portability, but the bandwidth and radiation efficiency of the conventional built-in antenna are not ideal. Under the circumstances, how to ensure the bandwidth and the radiation efficiency at the same time under the miniaturization of the size has become an urgent issue to be solved.
Disclosure of Invention
The present invention provides a communication device which can simultaneously ensure bandwidth and radiation efficiency under the miniaturization of size.
The invention provides a communication device which comprises a grounding surface and an antenna element. The antenna element comprises a first radiation part and a second radiation part. The first radiation part comprises a meander section and a rectangular metal section. The serpentine section has a square hook (rectangular hook) configuration. A feed point is disposed at a first end of the meandering section, and a second end of the meandering section is electrically connected to the rectangular metal section. The second radiation part has an L-shaped structure. A first end of the second radiating part is electrically connected to the ground plane. A first parallel slot is formed between a first end of the rectangular metal section and a second end of the second radiating portion. The communication device operates in a second frequency band through the first radiation part, and operates in a first frequency band through the first radiation part and the second radiation part.
Based on the above, the communication device of the present invention has a dual-band operating bandwidth. The first radiation part has a parallel bending structure, and the winding section of the first radiation part can be used as a main resonance radiation element and resonates in a high-frequency band on the basis of one eighth wavelength. Moreover, the bandwidth of the high-frequency band can be further expanded through the rectangular metal section of the first radiation part and the second parallel slot. In addition, the rectangular metal section of the first radiation part is connected to the winding section, and the rectangular metal section is provided with a second parallel slot at the first end and can be coupled and resonated with the second radiation part grounded in the shape of the inverted L, so that the communication device can be operated in a low-frequency band. Therefore, the working bandwidth of the antenna of the communication device can be increased under the miniaturization of the size.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic diagram of a communication device according to an embodiment of the invention;
FIG. 2 is a return loss diagram of the communication device according to the embodiment of FIG. 1;
FIG. 3 is a schematic voltage standing wave ratio diagram of the communication device according to the embodiment of FIG. 1;
fig. 4A to 4C are radiation patterns of the communication device of fig. 1 in the X-Y plane according to the embodiment;
fig. 5A to 5C are radiation patterns of the communication device of fig. 1 in the Y-Z plane according to the embodiment;
fig. 6A to 6C are radiation field diagrams of the communication device of fig. 1 in the X-Z plane according to the embodiment.
Description of the reference numerals
10: communication device
100A: antenna element
100G: ground plane
110: a first radiation part
110M: meandering section
110M 1-110M 4, 120L5, 120L 6: segment of
110T: rectangular metal section
120: second radiation part
CG 1: first parallel slot
CG 2: second parallel slot
DIScg1, DIScg2, DIS1, DIS2, DD1, DD 2: distance between two adjacent plates
FP: feed-in point
f2402, f2442, f2484, f5180, f5320, f5520, f5720, f5825, f 5835: curve line
Wm, Ws, WL: width of
Detailed Description
Directional phrases used in connection with embodiments, such as: "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the figures. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting. In the drawings, which illustrate general features of methods, structures, and/or materials used in certain exemplary embodiments. These drawings, however, should not be construed as limiting or restricting the scope or nature covered by these exemplary embodiments. For example, the relative sizes, thicknesses, and locations of various film layers, regions, and/or structures may be reduced or exaggerated for clarity.
In the embodiments, the same or similar elements will be denoted by the same or similar reference numerals, and the detailed description thereof will be omitted. Furthermore, the features of the different exemplary embodiments may be combined with each other without conflict and simple equivalent changes and modifications made in the present specification or claims may still fall within the scope of the present patent. In addition, the terms "first", "second", and the like in the description or the claims are only used for naming discrete (discrete) elements or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit of the number of elements, nor for limiting the manufacturing order or the arrangement order of the elements.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a communication device 10 according to an embodiment of the invention. The communication device 10 includes a ground plane 100G and an antenna element 100A. In some embodiments, the ground plane 100G and the antenna element 100A are fabricated on the same Printed Circuit Board (PCB), such as a glass fiber epoxy copper (FR4) PCB. In some embodiments, the ground plane 100G is coplanar with the antenna element 100A; in other embodiments, the ground plane 100G and the antenna element 100A are located in different planes, such as different planes that are parallel to each other. Since the ground plane 100G and the antenna element 100A can be made of a planar metal material by stamping or cutting or by conductive substrate printing processing, production yield can be improved and cost can be reduced. In some embodiments, the antenna element 100A is located in a clearance area, and the ground plane 100G is free of this clearance area, i.e., no ground plane 100G or other ground element is located in the clearance area.
The antenna element 100A includes a first radiation portion 110 and a second radiation portion 120. The first radiation portion 110 includes a meandering (meander) section 110M and a rectangular metal section 110T. A feed point FP is disposed at a first end of the meandering section 110M, and a second end of the meandering section 110M is electrically connected to the rectangular metal section 110T. The feed point FP may be coupled to a signal source (not shown) via a wire (not shown), for example, a transceiver of the communication device 10.
In some embodiments, a bend is formed between the sections 110M1, 110M 2; a bend is formed between the sections 110M2, 110M 3; a bend is formed between the sections 110M3, 110M 4; a bend is formed between the section 110M4 and the rectangular metal section 110T. In this case, the first radiation portion 110 has a bent polygonal line structure. In some embodiments, the first radiation part 110 has a semi-closed (closed) structure, that is, the bent first radiation part 110 does not form a closed pattern due to the absence of a partial section. In some embodiments, the section 110M1 is parallel to the section 110M3 and the rectangular metal section 110T, and the section 110M2 is parallel to the section 110M4, that is, the first radiation portion 110 has a shape of parallel bends. In some embodiments, section 110M2 is perpendicular to sections 110M1, 110M3 and rectangular metal section 110T. In some embodiments, serpentine segment 110M has a generally square hook (U-shaped) or U-shaped structure, i.e., segments 110M 2-110M 4 of serpentine segment 110M are bent to form a notch. Rectangular metal section 110T is disposed opposite (overlapping) the notch formed by serpentine section 110M.
In some embodiments, at least one of the segments 110M 1-110M 4 of serpentine segment 110M has a width Wm, and rectangular metal segment 110T has a width Ws, wherein the widths Wm, Ws extend in a direction perpendicular to the direction of current flow, such that the widths Wm, Ws are related to the amount of cross-sectional area through which current flows; in some embodiments, the segments 110M 1-110M 4 of serpentine segment 110M have equal width Wm, and rectangular metal segment 110T has uniform width Ws, but the invention is not limited thereto.
On the other hand, a first end of the second radiating portion 120 is electrically connected to the ground plane 100G and can be used as the ground terminal. The second radiation part 120 includes sections 120L5, 120L6, wherein the sections 120L5, 120L6 have a linear structure, respectively. The segment 120L5 (also referred to as the fifth segment) is electrically connected between the segment 120L6 (also referred to as the sixth segment) and the ground plane 100G. In some embodiments, a bend is formed between the sections 120L5, 120L 6; in some embodiments, section 120L5 is perpendicular to section 120L 6. In this case, the second radiation portion 120 has a bent zigzag structure, and may have an L-shaped (L-shaped) structure, such as an inverted L-shaped ground. In some embodiments, the section 120L5 or the section 120L6 of the second radiating portion 120 has a width WL, wherein the width WL extends in a direction perpendicular to the direction of current flow, and thus the width WL is related to the amount of cross-sectional area through which current flows; in some embodiments, the sections 120L5, 120L6 of the second radiating portion 120 have equal widths WL, but the invention is not limited thereto.
As shown in fig. 1, the second radiation part 120 partially surrounds the first radiation part 110. In some embodiments, the first radiating portion 110 is spaced apart from the second radiating portion 120 by an unequal spacing (unequal spacing). The rectangular metal section 110T is perpendicular to the section 120L5 of the second radiating part 120, and the first end of the rectangular metal section 110T is separated from the second end of the second radiating part 120 by a first parallel slot CG 1. The first parallel slot CG1 is the shape of an open slot formed by the edge of the first end of the rectangular metal section 110T being parallel to the edge of the second end of the second radiating part 120. The section 110M4 of the first radiation part 110 is disposed parallel to and separated from the section 120L5 of the second radiation part 120 by a distance DIS 1. Similarly, the section 110M3 of the first radiation part 110 and the section 120L6 of the second radiation part 120 are arranged in parallel and separated by a distance DIS 2. In some embodiments, the distance DIScg1 of the first parallel slot CG1 is different from the distance DIS1 (or distance DIS2) to space the first radiating portion 110 from the second radiating portion 120 unequally; in some embodiments, the distance DIScg1 of the first parallel slot CG1 is less than the distance DIS1 (or distance DIS 2).
As can be seen from the above, the first end of the rectangular metal section 110T is disposed adjacent to the second end of the second radiation portion 120, and separated from direct contact with each other by the first parallel slot CG1 between the first end of the rectangular metal section 110T and the second end of the second radiation portion 120. The first parallel slot CG1 may serve as a coupling gap, that is, a coupling, for example, a capacitive coupling, may be formed between the first end of the rectangular metal section 110T and the second end of the second radiating portion 120, so that the first radiating portion 110 and the second radiating portion 120 coupled to each other generate a loop surface current (loop surface current), so that the surface current or current density of the slotted portion (i.e., the first end of the rectangular metal section 110T and the second end of the second radiating portion 120) is maximized, and the antenna operating bandwidth (bandwidth) may be increased.
In some embodiments, the first radiating portion 110 and the second radiating portion 120 form a coupling between the vicinity of the end point of the rectangular metal section 110T and the vicinity of the end point of the section 120L 5. That is, the communication device 10 can be coupled to the second radiating portion 120 at the end point through the first radiating portion 110. To ensure coupling between the first and second radiating portions 110 and 120, in some embodiments, the width Ws of the rectangular metal section 110T is greater than the width of the serpentine section 110M.
On the other hand, the second end of the rectangular metal segment 110T is separated from the ground plane 100G by a second parallel slot CG 2. In some embodiments, the distance DIScg2 of the second parallel slot CG2 is less than the distance DIS1 (or distance DIS 2); that is, the second ends of the rectangular metal sections 110T are disposed adjacent to the ground plane 100G and separated from direct contact with each other by the second parallel slots CG2 between the second ends of the rectangular metal sections 110T and the ground plane 100G. The second parallel slot CG2 is an outer shape of the rectangular metal segment 110T, wherein the edge of the second end is parallel to the edge of the ground plane 100G and forms an open slot. The second parallel slot CG2 can be used as a coupling gap, that is, the second end of the rectangular metal section 110T and the ground plane 100G can be coupled, for example, capacitively coupled, so that a loop surface current can be generated between the first radiating portion 110 and the ground plane 100G, and the surface current or current density at the slot portion (i.e., at the second end of the rectangular metal section 110T and at the edge of the ground plane 100G) is maximized, thereby increasing the operating bandwidth of the antenna.
In some embodiments, the first radiating portion 110 is primarily coupled to the ground plane 100G near its end. That is, the communication device 10 can be coupled to the ground plane 100G at the end point through the first radiation portion 110. To ensure coupling between the first radiating portion 110 and the ground plane 100G, in some embodiments, the width WL of the second radiating portion 120 is less than the width Ws of the rectangular metal section 110T. That is, the ground plane 100G is coupled to the wider rectangular metal section 110T at the end points.
In low frequency operation, the rectangular metal section 110T can be connected to the meandering section 110M, and the rectangular metal section 110T is provided with the second parallel slot CG2 at the first end, so as to couple and resonate with the second radiation portion 120 grounded in the shape of an inverted L, so that the communication device 10 can operate in the 2.4GHz working band. The loop surface current generated by the radiation metals (i.e., the first radiation part 110 and the second radiation part 120) of the coupling part can increase the working bandwidth of the antenna.
Specifically, in some embodiments, the meandering section 110M, the partial rectangular metal section 110T, the first parallel slot CG1, and the second radiating portion 120 of the first radiating portion 110 may form a first resonant path, and the first resonant path may generate a first resonant mode corresponding to the first frequency band. That is, the communication device 10 can operate in a first frequency band through the first radiation portion 110 and the second radiation portion 120. The first frequency band may be a low frequency band, such as a 2.4G band (approximately between 2.4GHz and 2.5 GHz). In this case, a signal may be transmitted from the feed point FP to the meandering section 110M and the rectangular metal section 110T of the first radiation part 110, coupled from the first radiation part 110 to the second radiation part 120 through the first parallel slot CG1, and grounded through the second radiation part 120. In other words, the antenna element 100A may form an open-loop antenna structure through the first parallel slot CG1, and the loop surface currents generated by the first radiating portion 110 and the second radiating portion 120 due to coupling at the first parallel slot CG1 may not only increase the antenna operating bandwidth, but also the first parallel slot CG1 may help to reduce the physical size of the antenna element 100A. In some embodiments, a first resonant path of the antenna element 100A has a length less than one-half wavelength of (a center frequency of) the first frequency band; in some embodiments, the length of the first resonant path of the antenna element 100A is one quarter wavelength of (the center frequency of) the first frequency band. Wherein the length of the first resonant path is the sum of the length of the meandering section 110M, the distance DD1, the distance DIScg1 of the first parallel slot CG1, and the length of the second radiating portion 120. And distance DD1 (which may also be referred to as a first distance) is defined as the distance separating the second end of serpentine segment 110M from the first end of rectangular metal segment 110T. As can be seen from the above, the antenna element 100A has a shorter characteristic length than the conventional antenna element, which contributes to the miniaturization of the communication device 10.
For high frequency operation, the meandering section 110M can serve as a main resonant radiating element, and the meandering section 110M can resonate on the basis of one-eighth wavelength to obtain an operating frequency range of 5GHz, for example, the center frequency of the communication device 10 operating in the high frequency band can be 5.5 GHz. Moreover, the rectangular metal segment 110T and the rectangular metal segment 110T are coupled to the ground in the second parallel slot CG2, so that the bandwidth can be further extended, and the communication device 10 can operate at 4.9GHz to 5.85 GHz.
Specifically, in some embodiments, the meandering section 110M of the first radiating portion 110 is the main resonant path of the high frequency band. In some embodiments, to extend the bandwidth, the meandering section 110M, the rectangular metal section 110T and the second parallel slot CG2 of the first radiating portion 110 may form a second resonant path, and the second resonant path may generate a second resonant mode corresponding to a second frequency band. That is, the communication device 10 can operate in a second frequency band through the first radiation portion 110. The second frequency band may be a high frequency band, such as a 5G band (between about 4900MHz and 5850 MHz). In this case, the signal can be transmitted from the feed point FP to the meandering section 110M and the rectangular metal section 110T of the first radiation portion 110, and then coupled to the ground through the second parallel slot CG 2. In other words, the antenna element 100A may form an open loop (open loop) antenna structure through the second parallel slot CG2, the loop surface current generated by the first radiating part 110 at the second parallel slot CG2 due to coupling may not only increase the antenna operating bandwidth, but also the second parallel slot CG2 may help to reduce the physical size of the antenna element 100A. In some embodiments, the length of the second resonant path of the antenna element 100A is less than one-half wavelength of (the center frequency of) the second frequency band; in some embodiments, the length of the meandering section 110M of the antenna element 100A is one-eighth wavelength of (the center frequency of) the second frequency band. Wherein the length of the second resonant path is the sum of the length of the serpentine section 110M, the distance DD2, and the distance DIScg2 of the second parallel slots CG 2. And distance DD2 is defined as the distance separating the second end of serpentine segment 110M, the width of segment 110M4, and the second end of rectangular metal segment 110T. As can be seen from the above, the antenna element 100A has a shorter characteristic length than the conventional antenna element, which contributes to the miniaturization of the communication device 10.
As can be seen from the above description, the antenna element 100A of the communication device 10 has two resonant paths, and is capable of operating in dual bands of a first frequency band (e.g., a low frequency band) and a second frequency band (e.g., a high frequency band). To further ensure impedance matching, in some embodiments, the feed point FP is disposed adjacent to the second end (also referred to as a ground end) of the rectangular metal segment 110T, and the feed point FP and the second end of the rectangular metal segment 110T are disposed away from the first end (also referred to as a ground end) of the second radiation portion 120. That is, for the first resonant path, the first end of the meandering section 110M for disposing the feed point FP is far away from the first end of the second radiation portion 120 for disposing the ground; for the second resonant path, the first end of the meandering section 110M for setting the feed point FP is disposed adjacent to the second end of the rectangular metal section 110T for coupling to the ground. However, the present invention is not limited thereto, and the positions of the ground terminal and the feeding terminal can be adjusted according to different design considerations.
Referring to fig. 2, fig. 2 is a schematic diagram of return loss (return loss) of the communication device 10 according to the embodiment of fig. 1. As can be seen from FIG. 2, the return loss of the communication device 10 is-11.016 dB at 2.402GHz, -15.342dB at 2.45GHz, -16.246dB at 2.48GHz, -10.278dB at 5.18GHz, -9.9264dB at 5.35GHz, -13.566dB at 5.5GHz, -13.011dB at 5.745GHz, and-9.8891 dB at 5.85 GHz. That is, by the structural design of the antenna element 100A, the return loss of the communication device 10 is less than-9.5 dB in the operation frequency band covered by the communication device 10, and the antenna can be used as an ideal dual-band open-loop antenna.
Referring to fig. 3, fig. 3 is a schematic Voltage Standing Wave Ratio (VSWR) diagram of the communication device 10 according to the embodiment of fig. 1. As can be seen from fig. 3, the standing wave ratio of the antenna voltage is 1.7939: 1 at 2.402GHz, 1.4205: 1 at 2.45GHz, 1.3721: 1 at 2.48GHz, 1.8847: 1 at 5.18GHz, 1.9291: 1 at 5.35GHz, 1.5269: 1 at 5.5GHz, 1.5711: 1 at 5.745GHz, 3.4121: 1 at 5.745GHz, and 1.9433: 1 at 5.85 GHz. That is, by the structural design of the antenna element 100A, the voltage standing wave ratios of the communication device 10 are less than 2.0 to 1 in the operation frequency band to be covered by the communication device 10, and the communication device can be used as an ideal dual-band open-loop antenna.
Referring to fig. 4A to 4C, fig. 4A to 4C are radiation field diagrams of the communication device 10 according to the embodiment of fig. 1 in the X-Y plane. The numbers on the circumference are degrees of the circumference, the distance between the curve and the center of the circle in the radiation field corresponds to the gain (gain) in decibels (decibel, dB), the curves f2402 (solid line), f2442 (thin dashed line) and f2484 (thick dashed line) in fig. 4A correspond to the radiation field of the communication device 10 at 2.402GHz, 2.442GHz and 2.484GHz, respectively, the curves f5180 (solid line), f5320 (thin dashed line) and f5520 (thick dashed line) in fig. 4B correspond to the radiation field of the communication device 10 at 5.180GHz, 5.320GHz and 5.520GHz, respectively, and the curves f5720 (solid line), f5825 (thin dashed line) and f5835 (thick dashed line) in fig. 4C correspond to the radiation field of the communication device 10 at 5.720GHz, 5.825GHz and 5.835GHz, respectively. As can be seen from fig. 4A to 4C, since the second resonant path and the first resonant path are designed differently, the patterns of the communication device 10 in different frequency bands are not identical. Even though there is a slight difference in directivity, the X-Y plane radiation pattern of the communication device 10 is similar to omnidirectional radiation and has good signal transceiving capability under the structural configuration of the antenna element 100A.
Referring to fig. 5A to 5C, fig. 5A to 5C are radiation field diagrams of the communication device 10 according to the embodiment of fig. 1 in the Y-Z plane. Wherein the curve f2402 (solid line), the curve f2442 (thin dashed line) and the curve f2484 (thick dashed line) in fig. 5A correspond to the radiation field patterns of the communication device 10 at 2.402GHz, 2.442GHz and 2.484GHz, respectively, the curve f5180 (solid line), the curve f5320 (thin dashed line) and the curve f5520 (thick dashed line) in fig. 5B correspond to the radiation field patterns of the communication device 10 at 5.180GHz, 5.320GHz and 5.520GHz, respectively, and the curve f5720 (solid line), the curve f5825 (thin dashed line) and the curve f5835 (thick dashed line) in fig. 5C correspond to the radiation field patterns of the communication device 10 at 5.720GHz, 5.825GHz and 5.835GHz, respectively. As can be seen from fig. 5A to 5C, since the second resonant path and the first resonant path are designed differently, the patterns of the communication device 10 in different frequency bands are not identical. Even though there is a slight difference in directivity, the Y-Z plane radiation pattern of the communication device 10 is similar to omnidirectional radiation and has good signal transceiving capability in the structural configuration of the antenna element 100A.
Referring to fig. 6A to 6C, fig. 6A to 6C are radiation field diagrams of the communication device 10 according to the embodiment of fig. 1 in the X-Z plane. Wherein the curve f2402 (solid line), the curve f2442 (thin dashed line) and the curve f2484 (thick dashed line) in fig. 6A correspond to the radiation field patterns of the communication device 10 at 2.402GHz, 2.442GHz and 2.484GHz, respectively, the curve f5180 (solid line), the curve f5320 (thin dashed line) and the curve f5520 (thick dashed line) in fig. 6B correspond to the radiation field patterns of the communication device 10 at 5.180GHz, 5.320GHz and 5.520GHz, respectively, and the curve f5720 (solid line), the curve f5825 (thin dashed line) and the curve f5835 (thick dashed line) in fig. 6C correspond to the radiation field patterns of the communication device 10 at 5.720GHz, 5.825GHz and 5.835GHz, respectively. As can be seen from fig. 6A to 6C, since the second resonant path and the first resonant path are designed differently, the patterns of the communication device 10 in different frequency bands are not identical. Even though there is a slight difference in directivity, the X-Z plane radiation pattern of the communication device 10 is similar to omnidirectional radiation and has good signal transceiving capability in the structural configuration of the antenna element 100A.
Referring to table 1, table 1 is a table of antenna characteristics of the communication device 10 according to the embodiment of fig. 1, where table 1 shows maximum Gain (Peak Gain) and Average Gain (Average Gain) of the communication device 10 in X-Y plane, Y-Z plane and X-Z plane at different frequencies according to fig. 4A to 6C. As can be seen from table 1, the communication device 10 has a high gain in the structural arrangement of the antenna element 100A.
In summary, the communication device 10 of the present invention has a dual-band operating bandwidth. The first radiation portion 110 has a parallel bending structure, and the meandering section 110M of the first radiation portion 110 can be used as a main resonant radiation element to resonate in a high frequency band based on one eighth wavelength. Moreover, the bandwidth of the high frequency band can be further extended by the rectangular metal section 110T of the first radiation portion 110 and the second parallel slot CG 2. In addition, the rectangular metal section 110T of the first radiation portion 110 is connected to the meandering section 110M, and the rectangular metal section 110T is provided with a second parallel slot CG2 at a first end thereof, so as to couple and resonate with the second radiation portion 120 grounded in an inverted L shape, so that the communication device 10 can operate in a low frequency band. Thus, the antenna operation bandwidth of the communication device 10 can be increased with a miniaturized size.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A communication device, comprising:
a ground plane; and
an antenna element, comprising:
the first radiation part comprises a meandering section and a rectangular metal section, the meandering section has a square hook-shaped structure, a feed point is arranged at a first end of the meandering section, and a second end of the meandering section is electrically connected to the rectangular metal section; and
the second radiation part is provided with an L-shaped structure, the first end of the second radiation part is electrically connected to the ground plane, the first end of the rectangular metal section and the second end of the second radiation part are separated by a first parallel slot, the communication device operates in a first frequency band through the first radiation part and the second radiation part, and the communication device operates in a second frequency band through the first radiation part.
2. The communication device of claim 1, wherein the serpentine segment comprises:
the feed-in point is arranged at one end of the first section;
a second section electrically connected to the first section, wherein a bend is formed between the first section and the second section;
a third section electrically connected to the second section, wherein a bend is formed between the third section and the second section, and the third section is parallel to the first section;
and the fourth section is electrically connected between the rectangular metal section and the third section, a bend is formed between the third section and the fourth section, and the fourth section is parallel to the second section.
3. The communication device of claim 1, wherein the meandering segment, a portion of the rectangular metal segment, the first parallel slot, and the second radiating portion form a first resonant path that generates a first resonant mode corresponding to the first frequency band.
4. The communication device of claim 3, wherein the second end of the meandering section is separated from the first end of the rectangular metal section by a first distance, a length of the first resonant path of the antenna element corresponds to a quarter wavelength of the first frequency band, and the length of the first resonant path is a sum of the length of the meandering section, the first distance, the distance of the first parallel slot, and the length of the second radiating portion.
5. The communication device of claim 1, wherein the second end of the rectangular metal segment is separated from the ground plane by a second parallel slot.
6. The communication device of claim 5, wherein the serpentine section, rectangular metal section, and the second parallel slot form a second resonant path that produces a second resonant mode corresponding to the second frequency band.
7. The communication device of claim 1, wherein the length of the meandering section of the antenna element corresponds to one-eighth of a wavelength of the second frequency band.
8. The communication device of claim 1, wherein the antenna element forms an open loop antenna structure.
9. The communication device of claim 1, wherein the second end of the serpentine segment is located between the first and second ends of the rectangular metal segment opposite each other.
10. The communication device of claim 1, wherein the rectangular metal section has a width greater than a width of the serpentine section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910836571.1A CN112448154A (en) | 2019-09-05 | 2019-09-05 | Communication device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910836571.1A CN112448154A (en) | 2019-09-05 | 2019-09-05 | Communication device |
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| CN112448154A true CN112448154A (en) | 2021-03-05 |
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Application publication date: 20210305 |