TWI509889B - Plate-type antenna having a signal-isolating structure - Google Patents

Description

Panel antenna with signal blocking structure

The present invention relates to a panel antenna, and more particularly to a panel antenna suitable for multi-radiator fabrication in one piece and having a signal blocking structure.

As wireless local area networks (WLANs) technology matures, in addition to making mobile devices, such as notebook computers, more convenient to connect to computers, peripheral devices such as printers, projectors, Scanners, microphone systems, and the like are also gradually moving toward wireless.

In recent years, the rapid development of wireless communication technology and semiconductor manufacturing has made wireless communication a necessity for life. The wireless communication system consists of a transmitter/receiver and an antenna, wherein the antenna is responsible for the conversion of electromagnetic energy between the circuit and the air, and is one of the important components in the communication system. Due to the shrinking of electronic products and the need for multiple bandwidths, the antenna design has been developed in a direction of downsizing, simplification of structure, and multi-frequency or wide-band technology.

Please refer to FIG. 1 for a top view of the antenna arrangement of a conventional wireless network device. The wireless network device generally includes a substrate 5 and two flat or printed antennas 61, 62. In order to improve the transmission performance of wireless network devices, conventional wireless network devices are conventionally configured with two or more antennas 61, 62. Since the two panel antennas 61 and 62 are easily interfered by the signal when the distance is too high, the conventional technique must separate the positions of the two panel antennas 61 and 62 as far as possible, for example, However, it is not limited to being disposed on two diagonals of the substrate 5, and the signal interference is reduced by a spatial distance. However, as the development trend of today's electronic devices is moving toward the goal of short, light and thin, the volume is getting smaller and smaller, and the spatial isolation method can not achieve good isolation signal interference effect. Moreover, if two sets of panel antennas 61 and 62 independently produced and assembled are used, not only the process and the assembly require higher cost and time, which obviously has room for further improvement of the antenna design requirements in the general market. .

The object of the present invention is to provide a planar antenna with a signal blocking structure, which does not need to be spatially isolated between antennas of a plurality of radiators, and the grounding end of the two radiators is formed with a barrier portion to isolate the two radiators. The current is used to simplify the process and reduce the size of the module.

For the above purpose, the planar antenna with the signal blocking structure of the present invention is disposed on a substrate, and the planar antenna with the signal blocking structure comprises: a first radiator, a second radiator and a blocking portion. . The first radiator has a first length, and the first radiator has a first ground end and a first feed end, and is electrically connected to a grounding portion of the substrate and a control circuit. . The second radiator has a second length, and one end of the second radiator has a second ground end and a second feed end, and is electrically connected to the ground portion and the control circuit respectively. The blocking portion is located between the first radiator and the second radiator, and is respectively connected to the first ground end and the second ground end, and the barrier body extends to have a third length, the third length and the first length The length and the second length are substantially equal. The first length of the barrier body is connected to the first ground end and the second ground end, and the third length of the barrier body is substantially equal to the first length of the first radiator and the second length of the second radiator The two lengths are equal, which will effectively block the signal interference between the first radiator and the second radiator to achieve good isolation and improve transmission efficiency.

The main principle of the planar antenna with the signal blocking structure of the present invention is mainly to integrally stamp the antenna of the multi-radiator, and the grounding ends of the two radiators are connected by a blocking portion to form an impedance instead of a space. isolation. The blocking portion isolates the signal interference between the two radiators, so that the transmission signals do not interfere with each other, and the transmission performance can be improved, the manufacturing process is simplified, the mold and assembly costs are reduced, and the module volume is reduced.

Please refer to FIG. 2A to FIG. 2D, which are schematic diagrams of the three-dimensional, front view, side view and bottom view of the preferred embodiment of the panel antenna with the signal blocking structure of the present invention. The planar antenna 1 having the signal blocking structure of the present invention can be disposed on a substrate 7 which is a printed circuit board composed of a dielectric material and is substantially flat rectangular shape, and the substrate 7 is further The system includes a grounding portion (GND) 71 and a control circuit 72. The ground portion 71 provides a function of electrical ground (GND). The control circuit 72 is disposed on the circuit layer (not shown) of the substrate 7. The circuit layout on the circuit layer, a plurality of integrated circuit components and a plurality of electronic components can provide 802.11a, 802.11b, Wireless network transmission function for communication protocols such as 802.11g, 802.11n or ultra-wideband (UWB). Since the control circuit 72 described herein can be used with conventional techniques and is not a main technical feature of the present invention, its detailed configuration will not be described below.

The panel antenna 1 having the signal blocking structure of the present invention is a single component which is bent by the stamping and integral forming process of the conductive metal foil, and therefore has almost the same thickness t except for the turning and bending. The panel antenna 1 having the signal blocking structure of the present invention includes: a first radiator 11, a second radiator 12, and a blocking portion 13. The first radiator 11 has a first length L1 extending along a first direction 91. One end of the first radiator 11 has a first ground end 111 and a first feed end 112. In this embodiment, The first grounding end 111 and the first feeding end 112 are respectively formed by bending a metal piece extending from one end of the first radiator 11 by a stamping process, and thus are formed with the first radiator 11 90 degree vertical and integral component. The first grounding end 111 and the first feeding end 112 are electrically connected to the grounding portion 71 of the substrate 7 and the control circuit 72, respectively. The first radiator 11 can provide signal oscillation to generate a frequency. In this embodiment, the frequency band of the frequency is approximately 2400 MHz to 2500 MHz, which is also a communication band suitable for wireless network communication, but the frequency band and the The substantial extension length of an antenna 11 can be adjusted according to actual needs. Therefore, the first length L1 is the total length of the first radiator 11 including its bent portion, that is, the length of the antenna whose antenna signal actually oscillates along the shape of the first radiator 11.

The second radiator 12 extends along a second direction 92 with a second length L2. In the embodiment, the first direction 91 is substantially perpendicular to the second direction 92. One end of the second radiator 12 has a second grounding end 121 and a second feeding end 122. In this embodiment, the second grounding end 121 and the second feeding end 122 are respectively processed by a stamping process. It is formed by bending a metal piece extending from one end of the second radiator 12, and is therefore an element which is substantially parallel and integral with the second radiator 12. The second grounding end 121 and the second feeding end 122 are electrically connected to the grounding portion 71 of the substrate 7 and the control circuit 72, respectively. And the second radiator 11 can provide signal oscillation to generate a frequency, the frequency band of the frequency is approximately 2400 MHz to 2500 MHz, and is also a communication band suitable for wireless network communication; similarly, the frequency band and the corresponding second day The extension length of the wire 12 can also be changed depending on actual needs. In the present invention, the second radiator 12 further has a bent portion 123, and the bending portion 123 is bent by the stamping process to form a U-shape to provide the substrate 7. Therefore, the bending zone 123 differs depending on the shape and size of the substrate 7. Therefore, the second length L2 is the total length of the second radiator 12 including the portion of the bending portion 123, that is, the length of the antenna whose antenna signal actually oscillates along the shape of the second radiator 12, that is, but not limited to The sum of the lengths of the top surface 1231, the bottom surface 1232, and the side length 1233 of the bending region 123.

The blocking portion 13 is located between the first radiator 11 and the second radiator 12 and is connected to the first ground end 111 and the second ground end 121, respectively. The blocking portion 13 extends along a third direction 93 with a third length L3, which is substantially perpendicular to the first direction 91 and the second direction 92, and the third length L3, the third The lengths of one length L1 and the second length L2 are substantially equal. In the present invention, the blocking portion 13 has a substantially U-shaped shape, and the two side segments 131 and 132 are respectively connected to the first grounding end 111 and the second grounding end 121, and the two side segments 131 and 132 are connected to each other. 133 is connected, and the third length L3 is the sum of the total lengths of the two side segments 131, 132 and the engaging segments 133.

Please refer to FIG. 3A and FIG. 3B, which are parallel planes (θ=0°) and vertical planes (θ0) of the first radiator of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz). =90°) The radiation pattern obtained from the test. It can be seen from FIG. 3A that the first radiator 11 has a maximum gain value in the parallel plane of 1.49 dBi in the application frequency band range (2400 MHz to 2500 MHz). It can be seen from FIG. 3B that the first radiator 11 has a maximum gain value in the vertical plane of up to 0.47 dBi in the application frequency range (2400 MHz to 2500 MHz).

Please refer to FIG. 4A and FIG. 4B, which are parallel planes (θ=0°) and vertical planes (θ0) of the second radiator of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz). =90°) The radiation pattern obtained from the test. It can be seen from FIG. 4A that the second radiator 12 has a maximum gain value in the parallel plane of up to -1.20 dBi in the application frequency range (2400 MHz to 2500 MHz). It can be seen from FIG. 4B that the second radiator 12 has a maximum gain value in the vertical plane of up to 0.06 dBi in the application frequency range (2400 MHz to 2500 MHz).

Please refer to FIG. 5A and FIG. 5B again, which is an efficiency diagram of the first radiator and the second radiator of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz). As can be seen from the figure, the efficiency of the first radiator 11 of the panel antenna with the signal blocking structure of the present invention can be up to 54.19%, and the efficiency of the second radiator 12 can be up to 45.23%. The gain value of the first radiator 11 and the first radiator 12 of the panel antenna 1 having the signal blocking structure of the present invention is on the radiation pattern, and the radiation pattern of the parallel plane or the vertical plane is substantially close to A round shape means that it is more balanced and has no dead angles at different angles and directions, thus providing better communication quality.

Table 1: Gain performance of the first radiator and the second radiator

Please refer to FIG. 6 , which is a test return loss diagram of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz). Line 81, line 82, and line 83 in FIG. 6 are graphs obtained by testing the foldback loss of the first radiator, the second radiator, and the barrier portion, respectively. It can be seen from FIG. 6 that the foldback loss of the first radiator 11 of the panel antenna 1 having the signal blocking structure at the antenna resonance frequency of 2400 MHz to 2500 MHz is substantially between -13.029 dB and -16.566 dB; The foldback loss of the second radiator 12 at an antenna resonance frequency of 2400 MHz to 2500 MHz is substantially between -13.865 dB and -23.590 dB; and the blocking portion 13 is folded back at an antenna resonance frequency of 2400 MHz to 2500 MHz. The loss is roughly between -18.642dB and -29.676dB.

It can be seen that the panel antenna 1 with the signal blocking structure of the present invention has a foldback loss of less than -10 dB in the antenna resonance frequency (2400 MHz, 2450 MHz, 2500 MHz), which is sufficient for the general market design of the high performance antenna. It is conceivable that the planar antenna 1 with the signal blocking structure of the present invention increases the blocking portion 13 so that the signals transmitted between the first radiator 11 and the second radiator 12 do not interfere with each other, thereby improving transmission efficiency. It also simplifies the process and reduces the size of the module.

The above embodiments are not intended to limit the scope of application of the present invention. The scope of protection of the present invention should be based on the technical spirit defined by the content of the patent application scope of the present invention and the scope thereof. It is to be understood that the scope of the present invention is not limited by the spirit and scope of the present invention, and should be considered as a further embodiment of the present invention.

1. . . Panel antenna with signal blocking structure

11. . . First radiator

111. . . First ground

112. . . First feed end

12. . . Second radiator

121. . . Second ground

122. . . Second feed end

123. . . Bending area

1231. . . Top surface

1232. . . Bottom

1233. . . Side length

13. . . Barrier

131, 132. . . Side section

133. . . Connection segment

5. . . Substrate

61, 62. . . Panel antenna

7. . . Substrate

71. . . Grounding

72. . . Control circuit

81. . . First radiator fold loss test line

82. . . Second radiator fold loss test line

83. . . Barrier return loss test line

91. . . First direction

92. . . Second direction

93. . . Third direction

t. . . thickness

L1. . . First length

L2. . . Second length

L3. . . Third length

Figure 1 is a top view of an antenna arrangement for a conventional wireless network device.

FIG. 2A is a schematic perspective structural view of a preferred embodiment of a panel antenna having a signal blocking structure according to the present invention.

FIG. 2B is a schematic front view showing a preferred embodiment of a panel antenna having a signal blocking structure according to the present invention.

2C is a side view showing a preferred embodiment of a panel antenna having a signal blocking structure according to the present invention.

FIG. 2D is a bottom view of a preferred embodiment of a panel antenna having a signal blocking structure according to the present invention.

FIG. 3A is a radiation pattern diagram of the first radiator of the panel antenna with the signal blocking structure tested on a parallel plane (θ=0°) of the application frequency range (2400 MHz to 2500 MHz).

FIG. 3B is a radiation pattern diagram of the first radiator of the panel antenna with the signal blocking structure tested on the vertical plane (θ=90°) of the application frequency range (2400 MHz to 2500 MHz).

FIG. 4A is a radiation pattern diagram of the second radiator of the panel antenna with the signal blocking structure tested on a parallel plane (θ=0°) of the application frequency band range (2400 MHz to 2500 MHz).

FIG. 4B is a radiation pattern diagram of the second radiator of the panel antenna with the signal blocking structure tested on the vertical plane (θ=90°) of the application frequency range (2400 MHz to 2500 MHz).

FIG. 5A is an efficiency diagram of the first radiator of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz).

FIG. 5B is an efficiency diagram of the second radiator of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz).

Fig. 6 is a graph showing the test foldback loss of the panel antenna with the signal blocking structure in the application frequency band range (2400 MHz to 2500 MHz).

1‧‧‧Frame antenna with signal blocking structure

11‧‧‧First radiator

111‧‧‧First ground

112‧‧‧first feed end

12‧‧‧Second radiator

121‧‧‧Second ground

122‧‧‧second feed end

123‧‧‧Bending area

1231‧‧‧ top surface

1232‧‧‧ bottom

1233‧‧‧ Side length

13‧‧‧Barrier

131, 132‧‧‧ side body

133‧‧‧Connecting section

7‧‧‧Substrate

71‧‧‧ Grounding Department

72‧‧‧Control circuit

91‧‧‧First direction

92‧‧‧second direction

93‧‧‧ third direction

T‧‧‧thickness

L1‧‧‧ first length

L2‧‧‧ second length

L3‧‧‧ third length

Claims (6)

A planar antenna having a signal blocking structure is disposed on a substrate. The planar antenna having a signal blocking structure includes: a first radiator extending a first length, and one end of the first radiator has a first a grounding end and a first feeding end, and respectively electrically connected to a grounding portion of the substrate and a control circuit; a second radiating body extending a second length, the one end of the second radiating body having a second grounding end and a second feeding end, respectively electrically connected to the grounding portion and the control circuit; and a blocking portion located between the first radiator and the second radiator, and respectively Connecting the first ground end and the second ground end, the blocking body extends a third length, the third length, the first length and the second length are equal; wherein the first radiator, the first The second radiator and the blocking portion are formed by stamping a conductive metal foil into a body molding; wherein the first radiator extends in a first direction, and the second radiator is in a second direction Extension, the first And being substantially perpendicular to the second direction; wherein the blocking portion extends along a third direction, wherein the third direction is substantially perpendicular to the first direction and the second direction; wherein the blocking portion is The two side segments are respectively connected to the first ground end and the second ground end, and the two side segments are connected by a connecting segment, and the third length is the two side segments and the connecting segment Total length and. Such as the application of the patent scope of the first paragraph of the signal blocking structure of the tablet days a line, wherein the first radiator and the second radiator respectively provide signal oscillation to generate a frequency. A panel antenna having a signal blocking structure according to claim 2, wherein the frequency band of the frequency is between 2400 MHz and 2500 MHz. The panel antenna with a signal blocking structure according to claim 2, wherein the first length is a length in which the signal actually oscillates along the shape of the first radiator. The planar antenna with a signal blocking structure according to claim 2, wherein the second length is a length in which the signal actually oscillates along the shape of the second radiator. The planar antenna with a signal blocking structure according to the first aspect of the invention, wherein the second radiator further has a bending zone, the bending zone providing a substrate for fastening.