TWI631771B - Multiband mimo monopole antenna module - Google Patents

Abstract

The invention discloses a multi-band multi-input single-pole antenna module, which is suitable for a smart tablet device, and the multi-band multi-output single-pole antenna module comprises a substrate, a ground plane, a metal frame, a substrate frame and four micro circuits. The ground plane is disposed on one side of the substrate. The metal frame surrounds the substrate. The substrate frame is disposed on the metal frame. Each microcircuit includes a first ground circuit, a second ground circuit, an antenna circuit, and a T-coupled metal ring. One end of the first grounding circuit is connected to the ground plane, and the other end is connected to the metal frame. The second ground circuit includes a first capacitor, and one end of the second ground circuit is connected to the ground plane, and the other end is connected to the metal frame. The antenna circuit is disposed on the other side of the substrate, and the antenna circuit includes a high-pass circuit and a parallel resonant circuit. The high-pass circuit includes a second capacitor, and one end of the high-pass circuit is a feed point, and the other end is connected with a metal frame, and a connection line is formed between the first ground circuit and the second ground circuit, one end of the connection line is connected to the feed point, and the other end is connected The metal frame is connected; the parallel resonant circuit is composed of an inductor and a third capacitor, and one end of the parallel resonant circuit is connected to the high-pass circuit, and the other end is connected to the T-type coupled metal ring. The T-shaped coupling metal ring is disposed on the frame of the substrate, and one end of the T-shaped coupling metal ring is coupled to the other end of the parallel resonant circuit.

Description

Multi-band multi-input monopole antenna module

The invention relates to an antenna module, in particular to a multi-band multi-input single-pole antenna module suitable for a smart wearing device.

As mobile communication technologies change with each passing day, and in order to meet people's needs, mobile devices often have wireless communication capabilities.

Recently, mobile communication devices such as smart phones and tablets have become emerging mobile devices. Taking a tablet as an example, it has a wireless communication function, so it is necessary to set an antenna structure. However, more and more tablet functions are required today. The related module components will increase, and the trend of miniaturization of the current module components will be considered; therefore, how to make the antenna for wireless communication can be good without hindering the assembly of other module components. The wireless communication band will become a major challenge for related industries in designing antennas.

In view of the above-mentioned problems, an object of the present invention is to provide a multi-band multi-input single-pole antenna module for solving the problems faced by the prior art.

Based on the above object, the present invention provides a multi-band multi-input single-pole antenna module suitable for a smart tablet device, and the multi-band multi-input single-pole antenna module includes a substrate, a ground plane, a metal frame, a substrate frame, and four Microcircuit. The ground plane is disposed on one side of the substrate. The metal frame is placed around the substrate. The substrate frame is disposed on the metal frame. The four microcircuits are respectively disposed at four corners of the substrate, and each microcircuit includes a first ground circuit, a second ground circuit, an antenna circuit, and a T-type coupling metal ring. One end of the first grounding circuit is connected to the ground plane, and the other end is connected to the metal frame. The second ground circuit includes a first capacitor, and one end of the second ground circuit is connected to the ground plane, and the other end is connected to the metal frame. The antenna circuit is disposed on one side of the substrate opposite to the ground plane, the antenna circuit comprises a high-pass circuit and a parallel resonant circuit; the high-pass circuit comprises a second capacitor, and one end of the high-pass circuit is a feeding point, the other end is connected with a metal frame, and the feeding point is extended The wire is connected to the metal frame between the first ground circuit and the second ground circuit. The parallel resonant circuit is composed of an inductor and a third capacitor. One end of the parallel resonant circuit is connected to the high-pass circuit, and the other end is connected to the T-type coupled metal ring. The T-shaped coupling metal ring is disposed on the frame of the substrate, and one end of the T-shaped coupling metal ring is coupled to the other end of the parallel resonant circuit.

Preferably, there may be a gap between the metal frame and the substrate.

Preferably, the multi-band multi-input single-pole antenna module can be excited to generate an intermediate frequency band or a high frequency band via a high-pass circuit and a second ground circuit.

Preferably, the intermediate frequency band can be 2100 MHz to 2650 MHz, the intermediate frequency band has a bandwidth of 550 MHz, the high frequency band can be 3420 MHz to 3620 MHz, and the high frequency band can have a bandwidth of 200 MHz.

Preferably, the multi-band multi-input single-pole antenna module can generate a low-frequency frequency band through the parallel resonant circuit, the T-coupled metal ring and the first ground circuit.

Preferably, the low frequency band is 700 MHz and 900 MHz, and the low frequency band has a bandwidth of 80 MHz.

As described above, the multi-band multi-input and single-pole antenna module of the present invention can respectively provide microcircuits at four corners of the substrate, and can be matched by high-pass and parallel resonant circuits, and adjust parameters of inductance and capacitance to achieve Excitation of multi-frequency band and multi-input and multi-output.

The features, contents, and advantages of the present invention, as well as the advantages thereof, will be understood by the present invention. The present invention will be described in detail with reference to the accompanying drawings. The use of the present invention is not intended to be a limitation of the scope of the present invention, and the scope of the present invention is not limited by the scope and configuration of the accompanying drawings.

The advantages and features of the present invention, as well as the technical methods of the present invention, are described in more detail with reference to the exemplary embodiments and the accompanying drawings, and the present invention may be implemented in various forms and should not be construed as limited thereby. The embodiments of the present invention, and the embodiments of the present invention are intended to provide a more complete and complete and complete disclosure of the scope of the present invention, and The scope of the patent application is defined.

Please refer to FIG. 1 to FIG. 6; FIG. 1 is a first schematic diagram of the multi-band multi-output monopole antenna module of the present invention; FIG. 2 is a multi-band multi-input monopole antenna module of the present invention. The second schematic diagram is the third schematic diagram of the multi-band multi-output monopole antenna module of the present invention; the fourth and fifth diagrams are the multi-band multi-output monopole antenna module of the present invention. Schematic diagram of scattering parameters; Figure 6 is a schematic diagram of the antenna gain and efficiency of the multi-band multi-input single-pole antenna module of the present invention. As shown in the figure, the multi-band multi-output monopole antenna module 100 of the present invention is applicable to a smart tablet device, and the multi-band multi-input single-pole antenna module 100 includes a substrate 110, a ground plane 120, a metal frame 130, and a substrate. Frame 140 and four microcircuits 150. The substrate frame 140 is mainly disposed on the metal frame 130 adjacent to the four corners of the substrate 110.

In other words, the ground plane 120 is disposed on one side of the substrate 110. The metal bezel 130 is disposed around the substrate 110. The substrate frame 140 is disposed on the metal frame 130.

The four microcircuits 150 are respectively disposed at four corners of the substrate 110. Each of the microcircuits 150 includes a first ground circuit 160, a second ground circuit 170, an antenna circuit 180, and a T-type coupling metal ring 190. One end of the first grounding circuit 160 (as point C in FIG. 2) passes through the substrate 110 to connect to the ground plane 120, and the other end connects the metal frame 130. The second ground circuit 170 includes a first capacitor C1, and one end of the second ground circuit (as point D in FIG. 2) passes through the substrate 110 to connect to the ground plane 120, and the other end connects the metal frame 130. The antenna circuit 180 is disposed on one side of the substrate 110 opposite to the ground plane 120, the antenna circuit 180 includes a high-pass circuit 181 and a parallel resonant circuit 182; the high-pass circuit 181 includes a second capacitor C3, and one end of the high-pass circuit 181 is a feed point A, and the other end (As point E in FIG. 2), the metal frame 130 is connected, and the feed point A extends one end of the connection line 101 (as point B in FIG. 2) to connect between the first ground circuit 160 and the second ground circuit 170. Metal frame 130. The parallel resonant circuit 182 is composed of an inductor L1 and a third capacitor C2. One end of the parallel resonant circuit 182 is connected to the high-pass circuit 181, and the other end is connected to the T-type coupled metal ring 190. The T-type coupling metal ring 190 is disposed on the substrate frame 140, and one end of the T-type coupling metal ring 190 is coupled to the other end of the parallel resonant circuit 182.

There is a gap 102 between the metal frame 130 and the substrate 110, and the optimum gap is 0.5 mm. This is not limited thereto.

When the multi-band multi-input single-pole antenna module of the present invention is actually applied, the signal source is fed from the feed point A, and the multi-band multi-input single-pole antenna module 110 can pass through the high-pass circuit 181 and the second ground circuit. The 170 excitation produces an intermediate frequency band or a high frequency band.

The above intermediate frequency band can be 2100MHz to 2650MHz, the intermediate frequency band has a bandwidth of 550MHz, the high frequency band can be 3420MHz to 3620MHz, and the high frequency band can have a bandwidth of 200MHz.

On the other hand, the multi-band multi-input single-pole antenna module 110 can also generate a low-frequency frequency band after being fed into the signal source, via the parallel resonant circuit 182, the T-type coupled metal ring 190, and the first ground circuit 160.

The above low frequency band can be 700 MHz and 900 MHz, and the low frequency band has a bandwidth of 80 MHz.

In addition, the coupling path between the parallel resonant circuit 182 and the T-type coupled metal ring 190 affects the excitation of the 950 MHz mode and its triple and fifth frequencies; however, the first capacitor C1 mainly affects between 2000 MHz and 2700 MHz. Modality.

In addition, each capacitor and inductor will affect the frequency mode or its frequency doubling mode; for example, the capacitance value of the first capacitor C1 mainly affects the 1300 MHz mode and its frequency doubling mode; the capacitance value of the third capacitor C2 Mainly affects the 900 MHz mode; the capacitance value of the second capacitor C3 mainly affects the 2100 MHz mode; the inductance value of the inductor L1 mainly affects the 900 MHz mode. However, the above is only an example and is not limited thereto.

Figure 4 shows the matching degree of the antennas in the four corners of the substrate. The low-frequency operating band can be 700~780MHz and 970~1050MHz as shown in the figure. The bandwidth of the low-frequency band is 80MHz, and the intermediate frequency operates. It can be from 2100MHz to 2650MHz, wherein the frequency band has a bandwidth of 550MHz, the high frequency band can be from 3420MHz to 3620MHz, and the frequency band of the high frequency band can be 200MHz, and is shown in Figure 4 on the fourth substrate. The characteristics measured by the antennas of the corners are similar, indicating that the design structure has a better stability.

Figure 5 shows the degree of mutual influence of the antennas on the four corners of the substrate. As shown in the figure, except for the antennas in the upper and lower groups, the antennas in the low frequency band have a large degree of mutual influence due to the longer resonance wavelength. The rest have a better isolation in the low frequency, intermediate frequency and high frequency band.

Figure 6 shows the antenna gain and antenna efficiency for this antenna structure. The antenna gain in the low frequency band is -6~0dBi, and the antenna efficiency in the low frequency band is 30~58%. The antenna gain in the frequency band is -8~0dBi, and the intermediate frequency is The segment antenna efficiency is 10~36%, the antenna gain in the high frequency band is -6~0dBi, and the antenna efficiency in the high frequency band is 16~24%.

As described above, the multi-band multi-input and single-pole antenna module of the present invention can respectively provide microcircuits at four corners of the substrate, and can be matched by high-pass and parallel resonant circuits, and adjust parameters of inductance and capacitance to achieve Excitation of multi-frequency band and multi-input and multi-output.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

100‧‧‧Multi-band multi-input monopole antenna module
101‧‧‧Connecting line
102‧‧‧ gap
110‧‧‧Substrate
120‧‧‧ ground plane
130‧‧‧Metal border
140‧‧‧Substrate border
150‧‧‧Microcircuit
160‧‧‧First grounding circuit
170‧‧‧Second grounding circuit
180‧‧‧Antenna circuit
181‧‧‧Qualcomm Circuit
182‧‧‧ parallel resonant circuit
190‧‧‧T-coupled metal ring
A‧‧‧Feeding point
C1‧‧‧first capacitor
C2‧‧‧ third capacitor
C3‧‧‧second capacitor
L1‧‧‧Inductance

Figure 1 is a first schematic diagram of the multi-band multi-input monopole antenna module of the present invention. 2 is a second schematic diagram of the multi-band multi-input monopole antenna module of the present invention. Figure 3 is a third schematic diagram of the multi-band multi-input monopole antenna module of the present invention. 4 and 5 are schematic diagrams of scattering parameters of the multi-band multi-input single-pole antenna module of the present invention. Figure 6 is a schematic diagram of the antenna gain and efficiency of the multi-band multi-output monopole antenna module of the present invention.

Claims (6)

The utility model relates to a multi-band multi-input single-pole antenna module, which is suitable for a smart tablet device. The multi-band multi-input single-pole antenna module comprises: a substrate; a grounding surface is disposed on one side of the substrate; a metal frame is disposed around the substrate; a substrate frame is disposed on the metal frame; and four micro circuits are respectively disposed at four corners of the substrate, each of the micro circuits comprising: a first ground circuit One end is connected to the grounding surface, and the other end is connected to the metal frame; a second grounding circuit includes a first capacitor, and one end of the second grounding circuit is connected to the grounding surface, and the other end is connected to the metal frame; The circuit is disposed on one side of the substrate opposite to the ground plane, the antenna circuit includes: a high-pass circuit comprising a second capacitor, wherein one end of the high-pass circuit is a feed point, and the other end is connected to the metal frame And the feeding point extends a connecting line connecting the metal frame between the first grounding circuit and the second grounding circuit; and a parallel resonant circuit, the parallel harmonic One end of the vibrating circuit has two branches, one of which has an inductance and is connected to the high-pass circuit, the other of which has a third capacitor and is connected to the high-pass circuit; and a T-type coupled metal ring is disposed therein One end of the T-coupling metal ring is coupled to the other end of the parallel resonant circuit. The multi-band multi-input monopole antenna module according to claim 1, wherein the metal frame has a gap between the metal frame and the substrate. The multi-band multi-input single-pole antenna module according to claim 1, wherein the multi-band multi-input single-pole antenna module is excited by the high-pass circuit and the second ground circuit to generate an intermediate frequency band. Or a high frequency band. For example, the multi-band multi-input monopole antenna module described in claim 3, wherein the intermediate frequency band can be 2100 MHz to 2650 MHz, and the bandwidth of the intermediate frequency band is 550 MHz, and the high frequency band can be 3420 MHz to At 3620 MHz, the bandwidth of the high frequency band can be 200 MHz. . The multi-band multi-input single-pole antenna module according to claim 1, wherein the multi-band multi-input single-pole antenna module is connected to the parallel resonant circuit, the T-coupled metal ring, and the first The ground circuit is excited to generate a low frequency band. For example, the multi-band multi-input monopole antenna module described in claim 5, wherein the low frequency band can be 700 MHz and 900 MHz, and the low frequency band has a bandwidth of 80 MHz.