TWM567964U - Antenna device - Google Patents

Abstract

An antenna device includes a ground plate, a first and a second feed element and a radiator including a radiating plate and four radiating elements. Four sides of the radiating plate are respectively connected to a first side of the first radiating element, a first side of the second radiating element, a first side of the third radiating element and a first side of the fourth radiating element. A second side of the third radiating element and a second side of the fourth radiating element are connected to the ground plate. The first and the second feed elements are connected to a second side of the first radiating element and a second side of the second radiating element and configured to send and receive a first and a second signals in the same frequency band respectively.

Description

Antenna device

The present disclosure relates to an antenna device, and more particularly to an antenna device for dual feed.

With the development of technology, the demand for wireless signal transmission is increasing, and the structural design of the antenna has a significant impact on wireless signal transmission.

Therefore, how to reduce the size of the antenna and increase the transmission speed while maintaining good isolation is an important issue in the field.

One aspect of the present disclosure is directed to an antenna device comprising: a ground plane, a radiator, a first feed element, and a second feed element. The radiator comprises a radiation plane, a first radiating element, a second radiating element, a third radiating element and a fourth radiating element. The first side, the second side, the third side, and the fourth side of the radiation plane respectively connect the first side of the first radiating element, the first side of the second radiating element, the first side of the third radiating element, and the fourth radiation The first side of the component. The second side of the third radiating element and the second side of the fourth radiating element are connected to the ground plate. The first feed element is coupled to the second side of the first radiating element for transmitting and receiving the first signal. The second feeding component is connected to the second side of the second radiating component for transmitting and receiving the same signal as the first signal The second signal of the frequency band. The first radiating element and the second radiating element are mirror-symmetrical to the mirror symmetry line, and the third radiating element and the fourth radiating element are mirror-symmetrical to the mirror symmetry line.

Therefore, according to the technical aspect of the present invention, the embodiment of the present invention uses an antenna device to achieve the transceiving capability of two antennas of the same frequency band by using an antenna device.

100‧‧‧Antenna device

120‧‧‧ Grounding plate

140‧‧‧ radiator

141‧‧‧First radiating element

142‧‧‧Second radiating element

143‧‧‧ Third radiating element

144‧‧‧fourth radiating element

141a~144a‧‧‧ first side

141b~144b‧‧‧ second side

141c~144c‧‧‧ third side

141d~144d‧‧‧ fourth side

150‧‧‧radiation plane

151‧‧‧ first side

152‧‧‧ second side

153‧‧‧ third side

154‧‧‧ fourth side

155‧‧‧First filter structure

156‧‧‧Second filter structure

161‧‧‧First feed element

162‧‧‧second feed element

L‧‧‧Mirror symmetry line

D1, D2, D3‧‧‧ length

W‧‧‧Width

Θ‧‧‧ angle

X, Y, Z‧‧ Direction

P1, P2‧‧‧ feed points

C0, C1, C2‧‧‧ capacitor

L1, L2‧‧‧ inductance

200‧‧‧ equivalent circuit diagram

300, 400‧‧‧Experiment data map

500‧‧‧planar map

FIG. 1 is a perspective view of an antenna device according to some embodiments of the present disclosure.

FIG. 2 is an equivalent circuit diagram of an antenna device according to some embodiments of the present disclosure.

FIG. 3 is a diagram of experimental data of an antenna device according to some embodiments of the present disclosure.

4 is an experimental data diagram of another antenna device according to some embodiments of the present disclosure.

FIG. 5 is a plan view of a field device according to an embodiment of the present disclosure.

In order to make the description of the present invention more detailed and complete, reference is made to the accompanying drawings and the various embodiments described below. On the other hand, well-known components and steps are not described in the embodiments to avoid the novel content. Cause unnecessary restrictions.

The terms "coupled" or "connected" as used in the following various embodiments may mean that two or more elements are "directly" in physical or electrical contact with each other, or are "indirectly" in physical or electrical contact with each other. It can also mean that two or more components interact with each other.

In this document, "one" and "the" can be used to mean one or more, unless the article specifically defines the article. It will be further understood that the terms "comprising", "comprising", "having", and <RTIgt; One or more of its other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

Please refer to Figure 1. FIG. 1 is a perspective view of an antenna device 100 according to some embodiments of the present disclosure. As shown in FIG. 1, in some embodiments, the antenna device 100 includes a ground plate 120, a radiator 140, a first feed element 161, and a second feed element 162. The radiator 140 includes a first radiating element 141, a second radiating element 142, a third radiating element 143, a fourth radiating element 144, and a radiating plane 150.

In operation, the first feeding element 161 transmits the first signal S1 through the radiator 140. Similarly, the second feeding component 162 transmits the second signal S2 in the same frequency band as the first signal S1 through the radiator 140.

Structurally, the first side 151, the second side 152, the third side 153, and the fourth side 154 of the radiation plane 150 respectively connect the first side 141a of the first radiating element 141, the first side 142a of the second radiating element 142, Third radiating element The first side 143a of the 143 and the first side 144a of the fourth radiating element 144. The second side 143b of the third radiating element 143 and the second side 144b of the fourth radiating element 144 are respectively connected to the ground plate 120 as a grounding point. The first feeding element 161 is connected to the second side 141b of the first radiating element 141 with respect to the first side 141a as a feeding point of the first signal S1. The second feed element 162 is coupled to the second side 142b of the second radiating element 142 relative to the first side to serve as a feed point for the second signal S2.

The structures on both sides of the antenna device 100 are mirror-symmetrical to the mirror symmetry line L. In other words, the first radiating element 141 and the second radiating element 142 are mirror-symmetrical to each other, and the third radiating element 143 and the fourth radiating element 144 are mirror-symmetrical to each other.

Specifically, as shown in FIG. 1, the ground plane 120 is parallel to the XY plane, and the radiation plane 150 is also parallel to the XY plane. The first radiating element 141 and the fourth radiating element 144 are parallel to the YZ plane, and the second radiating element 142 and the third radiating element 143 are parallel to the XZ plane. The mirror symmetry line L is parallel to the angle bisector of the angle between the X axis and the Y axis on the XY plane.

Furthermore, the first side 151 of the radiation plane 150 is connected to the first side 141a of the first radiating element 141 parallel to the Y-axis. The second side 152 of the radiating plane 150 is coupled to the first side 142a of the second radiating element 142 parallel to the X-axis. The third side 153 of the radiation plane 150 is connected to the first side 143a of the third radiating element 143 parallel to the X-axis. The fourth side 154 of the radiating plane 150 is coupled to the first side 144a of the fourth radiating element 144 parallel to the Y-axis.

In other words, the first radiating element 141, the second radiating element 142, the third radiating element 143, and the fourth radiating element 144 are vertically disposed on the radiation plane 150, respectively.

In addition, the third radiating element 143 is connected to the ground plate 120 parallel to the X-axis with respect to the second side 143b of the first side 143a as a grounding point of the first signal S1. The fourth radiating element 144 is coupled to the ground plate 120 parallel to the Y-axis with respect to the second side 144b of the first side 144a as a ground point for the second signal S2. It should be noted that both the radiator 140 and the grounding plate 120 have a width W which is greater than zero and smaller than the length of the second radiating element 143 and the second side 143b, 144b of the fourth radiating element 144. .

In some embodiments, the first radiating element 141 and the second radiating element 142 are each trapezoidal. The first side 141a and the opposite second side 141b of the first radiating element 141 are parallel to each other, and the length of the first side 141a is greater than the length of the second side 141b. The third side 141c of the first radiating element 141 is perpendicular to the first side 141a and the second side 141b. The fourth side 141d of the first radiating element 141 has an included angle θ with the third side 141c, wherein the included angle θ is greater than zero.

In other words, the first radiating element 141 is a trapezoidal trapezoid, the first side 141a is a trapezoidal lower bottom, the second side 141b is a trapezoidal upper bottom, the third side 141c is trapezoidal high, and the fourth side 141d is a trapezoidal oblique side. . For example, the first side 141a has a length of about 13.5 mm, the third side 141c has a length of about 7.6 mm, and the fourth side 141d has a length of about 8 mm. The second radiating element 142 is all equal to the first radiating element 141, and the same content will not be described herein.

In some embodiments, the third radiating element 143 and the fourth radiating element 144 are respectively L-shaped. Specifically, as shown in FIG. 1, the first side 143a of the third radiating element 143 is about 14.5 mm, the third side 143c of the third radiating element 143 is about 10 mm, and the fourth side of the third radiating element 143. 143d It is about 9.4 mm. The fourth radiating element 144 is all equal to the third radiating element 143, and the same content will not be described herein.

In other partial embodiments, the radiation plane 150 of the radiator 140 further includes a first filtering structure 155. As shown in FIG. 1 , the first filtering structure 155 is located between the first side 151 and the second side 152 of the radiation plane 150 and is a rectangular aperture, and the first filtering structure 155 is mirror-symmetrical to the mirror symmetry line L. Specifically, the long side of the rectangular cutout is parallel to the mirror symmetry line L. In some embodiments, the long side of the rectangular aperture is about 5.05 mm and the short side of the rectangular aperture is about 4 mm.

In other partial embodiments, the radiating plane 150 of the radiator 140 further includes a second filtering structure 156. As shown in FIG. 1 , the second filter structure 156 is located between the third side 153 and the fourth side 154 of the radiation plane 150 and is a rectangular aperture, and the second filter structure 156 is mirror-symmetrical to the mirror symmetry line L. Specifically, the long side of the rectangular cutout is parallel to the mirror symmetry line L. In some embodiments, the long side of the rectangular aperture is about 10 mm and the short side of the rectangular aperture is about 5.05 mm.

It should be noted that the above length values are merely examples for convenience of explanation, and are not intended to limit the case. Those skilled in the art can set the length according to actual needs. In some embodiments, the long side and the short side of the first filtering structure 155 are different from the long side and the short side of the second filtering structure 156. In other words, in some embodiments, the areas of the first filtering structure 155 and the second filtering structure 156 are different, but the present invention is not limited thereto. In other embodiments, the shapes of the first filter structure 155 and the second filter structure 156 may also be identical.

In some embodiments, the distance between the first feed element 161 and the third side 141c of the first radiating element 141 is a first length D1. The third side 141c of the first radiating element 141 has a second length D2. The first side 143a of the third radiating element 143 has a third length D3. The sum of the first length D1, the second length D2, and the third length D3 is one quarter of the wavelength of the first signal S1. In other words, the current path from the feed point to the ground point is one quarter of the wavelength of the first signal S1.

Please refer to Figures 1 and 2 together. FIG. 2 is an equivalent circuit diagram 200 of an antenna device 100 according to some embodiments of the present disclosure. The first inductor L1 and the first capacitor C1 in Fig. 2 determine the operating frequency f _o1 of the antenna from the first feed point P1 as shown in the following equation:

The first inductor L1 and the first capacitor C1 are the first side 141a of the first radiating element 141 in FIG. 1, the third side 141c of the first radiating element 141, and the fourth side 141d of the first radiating element 141. The third side 143c of the third radiating element 143 and the fourth side 143d of the third radiating element 143 are sized.

Similarly, the second inductance L2 and the second capacitance C2 in FIG. 2 determine the operating frequency f _o2 of the antenna from the second feed point P2 as shown in the following equation:

Since the antenna device 100 is a mirror-symmetrical structure on both sides, the second inductor L2 and the second capacitor C2 are equivalent to the first inductor L1 and the first capacitor C1, which are determined by the same component size, and are not described herein again.

In addition, the second figure the first inductor L1, the second inductor L2 and a capacitance C0 determines the operating frequency of the filter structure -f _f, shown in the following formula between the first feeding point P1 and the second feeding point P2:

The first inductor L1, the second inductor L2, and the capacitor C0 are determined by the length and width of the first filter structure 155 in FIG. 1 and the length and width of the second filter structure 156.

In this way, by calculating the electrical length required for different operating frequencies, the appropriate size is designed such that the phase difference of the current generated by each feed point is 90 degrees or 180 degrees to achieve good isolation.

Please refer to Figure 3. FIG. 3 is an experimental data diagram 300 of the frequency-isolation S12 of an antenna device 100 according to some embodiments of the present disclosure. It can be seen from the experimental data map 300 that the two antennas sharing one radiator 140 are less than 20 dB apart from each other.

Please refer to Figure 4. 4 is an experimental data diagram 400 of frequency-reflection losses S11, S22 of an antenna device 100, according to some embodiments of the present disclosure. As can be seen from the experimental data map 400, the antenna device 100 has the smallest reflection losses S11, S22 at a frequency of 5.5 GHz.

Please refer to Figure 5. FIG. 5 is a plan view 500 of an antenna device 100 in an XZ plane, a YZ plane, and an XY plane, according to some embodiments of the present disclosure. As can be seen from the planar field pattern 500, the antenna efficiency is about 65% and the antenna gain is about 4.5 dBi.

In summary, the embodiment of the present invention uses an antenna device, and particularly an antenna device for dual-input single-band, to transmit and receive two antennas of the same frequency band through one radiator, thereby reducing the size of the antenna and having Good isolation.

Although the present disclosure has been disclosed in the above embodiments, It is not intended to limit the scope of the disclosure, and those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the disclosure. The definition is final.

Claims (10)

An antenna device comprising: a ground plate; a radiator comprising a radiation plane, a first radiating element, a second radiating element, a third radiating element and a fourth radiating element, a first of the radiating plane The first side, the second side, the third side and the fourth side are respectively connected to a first side of the first radiating element, a first side of the second radiating element, and a first side of the third radiating element And a first side of the fourth radiating element, the third radiating element is coupled to the ground plate with respect to a second side of the first side and a second side of the fourth radiating element with respect to the first side; a first feeding element connected to the second side of the first radiating element relative to the first side for transmitting and receiving a first signal; and a second feeding element connected to the second radiating element a second signal on the first side of the first side for transmitting and receiving a second signal in the same frequency band as the first signal, wherein the first radiating element and the second radiating element are mirror-symmetrical to a mirror symmetry line, the first The third radiating element and the fourth radiating element are mirror-symmetrical to the mirror Line of symmetry. The antenna device of claim 1, wherein a distance between the first feeding element and a third side of the first radiating element is a first length, and the third side of the first radiating element has a second length, the first side of the third radiating element has a third length, and the sum of the first length, the second length and the third length is one quarter of a wavelength of the first signal. The antenna device of claim 1, wherein the radiation plane further comprises a first filtering structure, the first filtering structure being located between the first side and the second side of the radiation plane, wherein the first filtering structure The mirror is symmetric to the mirror symmetry line. The antenna device of claim 3, wherein the first filtering structure is a rectangular aperture, and the long side of the rectangular aperture is parallel to the mirror symmetry line. The antenna device of claim 3, wherein the radiation plane further comprises a second filtering structure, the second filtering structure being located between the third side and the fourth side of the radiation plane, wherein the second filtering structure The mirror is symmetric to the mirror symmetry line. The antenna device of claim 5, wherein the second filter is a rectangular aperture, and the long side of the rectangular aperture is parallel to the mirror symmetry line. The antenna device of claim 5, wherein the first filter structure and the second filter structure have different areas. The antenna device of claim 1, wherein the first radiating element, the second radiating element, the third radiating element, and the fourth radiating element are respectively disposed perpendicular to the radiation plane. The antenna device of claim 1, wherein the first radiating element and the second radiating element are each a trapezoid, the first side and the second side of the first radiating element are parallel to each other, and the first side The length of the second radiating element is greater than the length of the second side, a third side of the first radiating element is perpendicular to the first side and the second side, and a fourth side and the third side of the first radiating element have An angle. The antenna device of claim 1, wherein the third radiating element and the fourth radiating element are each an L shape.