TWI652856B - Zigbee and gps dual antenna module - Google Patents

Abstract

The invention discloses a ZigBee and GPS dual-purpose antenna module, which comprises a spiral monopole antenna and a patch antenna. The spiral monopole antenna includes a first spiral portion and a second spiral portion; one end of the second spiral portion is coupled to one end of the first spiral portion. The patch antenna is centrally connected to the other end of the second spiral portion, the patch antenna includes a substrate and a loop antenna; one side of the substrate is a ground plane; the loop antenna is disposed on the other side of the substrate, and the loop antenna includes an outer loop antenna and a first connecting antenna a first inner arc antenna, a second connecting antenna and a second inner arc antenna; the outer loop antenna is connected to the ground plane and has a feeding point; the first connecting antenna is connected to the feeding point at one end and the grounding surface is connected to the other end; One end of the inner arc antenna is connected to one end of the first connecting antenna; one end of the second connecting antenna is connected to the outer ring antenna, and the other end is connected to the grounding surface; and one end of the second inner arc antenna is connected to one end of the second connecting antenna.

Description

ZigBee and GPS dual-use antenna module

The invention relates to an antenna module, in particular to a ZigBee and GPS dual-purpose antenna module.

In general, the antenna used to receive GPS signals is a ceramic antenna. Although it has the advantage of small size, its cost is not cheap. On the other hand, the frequency band supported by ceramic antennas only has 1574~1576MHz.

In view of the above, in order to respond to a single frequency band of the ceramic antenna, it is necessary to add other antennas to receive signals of other frequency bands, but the ceramic antenna cannot be externally connected to other antennas; therefore, the problem that the GPS antenna module has only a single frequency band cannot be effectively improved.

In view of the above-mentioned problems, an object of the present invention is to provide a ZigBee and GPS dual-purpose antenna module for solving the problems faced by the prior art.

Based on the above object, the present invention provides a ZigBee and GPS dual-purpose antenna module, which comprises a spiral monopole antenna and a patch antenna. The spiral monopole antenna includes a first spiral portion and a second spiral portion; one end of the second spiral portion is coupled to one end of the first spiral portion. The patch antenna is centrally connected to the other end of the second spiral portion, the patch antenna includes a substrate and a loop antenna; the substrate is grounded on one side of the spiral monopole antenna; the loop antenna is disposed on the other side of the substrate, and the loop antenna includes an outer loop antenna a first connecting antenna, a first inner arc antenna, a second connecting antenna and a second inner arc antenna; the outer loop antenna is connected to the ground plane and has a feeding point; the first connecting antenna is connected to the feeding point at one end, and the other end is connected Connecting the grounding surface; one end of the first inner arc antenna is connected to one end of the first connecting antenna relative to the outer loop antenna; one end of the second connecting antenna is connected to the outer feeding point of the outer loop antenna, and the other end is connected to the grounding surface; the other end of the second inner arc antenna is connected One end of the opposite outer loop antenna connecting the second connecting antenna.

Preferably, the ZigBee and GPS dual-purpose antenna module can excite the ZigBee frequency band via the first spiral portion and the second spiral portion.

Preferably, the ZigBee band is 922 MHz.

Preferably, the first spiral portion and the second spiral portion may have a spacing, the number of turns of the first spiral portion is smaller than the number of turns of the second spiral portion, and the spiral pitch of the first spiral portion is larger than the spiral of the second spiral portion spacing.

Preferably, the ZigBee and GPS dual-purpose antenna module can excite the GPS band via the first inner arc antenna.

Preferably, the GPS band is 1584 MHz.

Preferably, the ZigBee and GPS dual-purpose antenna module can excite the satellite frequency band via the second inner arc antenna.

Preferably, the satellite frequency band is 1620 MHz.

Preferably, the feed point is 12.3 mm from one end of the first connection antenna connection ground plane, and the first connection antenna is connected to one end of the ground plane from the first inner arc antenna to one end of the first connection antenna by 33 mm, and the second connection One end of the antenna connection ground plane is spaced apart from the second inner arc antenna by 38 mm from one end of the second connection antenna, and the feed point is counterclockwise along the distance from the outer loop antenna to one of the outer loop antenna connection ground planes of 26.25 mm.

Preferably, the ZigBee and the GPS dual-purpose antenna module further comprise a cover body, and the interconnected spiral monopole antenna and the patch antenna are disposed in the cover body.

As described above, the ZigBee and GPS dual-purpose antenna module of the present invention can externally connect the spiral monopole antenna to the patch antenna, thereby exciting the 922 MHz ZigBee frequency band by the spiral monopole antenna, and exciting by the patch antenna. The 1584MHz GPS band and the 1620MHz satellite band achieve the effect of external antennas and multi-band excitation.

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 Figures 1 to 3; Figure 1 is a first schematic diagram of the ZigBee and GPS dual-purpose antenna module of the present invention; Figure 2 is a spiral monopole antenna of the ZigBee and GPS dual-purpose antenna module of the present invention. FIG. 3 is a schematic diagram of a patch antenna of a ZigBee and GPS dual-purpose antenna module of the present invention. As shown, the ZigBee and GPS dual-purpose antenna module 100 of the present invention includes a spiral monopole antenna 110 and a patch antenna 120. One end of the spiral monopole antenna 110 is coupled to the center of the patch antenna 120.

In other words, the spiral monopole antenna 110 mentioned above includes a first spiral portion N1 and a second spiral portion N2; and one end of the second spiral portion N2 is coupled to one end of the first spiral portion N1.

On the other hand, at the center of the patch antenna 120, the second spiral portion N2 is connected to one end of the first spiral portion N1, and the patch antenna 120 includes the substrate 121 and the loop antenna 122.

The substrate 121 is a ground plane (not shown) with respect to one surface of the spiral monopole antenna 110. The loop antenna 122 is disposed on one surface of the coupled spiral monopole antenna 110 of the substrate 121. The loop antenna 122 includes an outer loop antenna 123, a first connecting antenna 124, a first inner arc antenna 125, a second connecting antenna 126, and a second inner arc. Antenna 127.

In more detail, the outer loop antenna 123 is connected to the ground plane at a point D (as shown in FIG. 3) and has a feed point (as shown in FIG. 3); one end of the first connection antenna 124 The feed point is connected, and the other end (such as point B shown in FIG. 3) is connected to the ground plane; the first inner arc antenna 125 is connected to one end of the first connection antenna 124 and the outer loop antenna 123; the second connection antenna 126 One end is connected to the outer loop antenna 123 at a feeding point, and the other end (such as point C shown in FIG. 3) is connected to the ground plane; the second inner arc antenna 127 is connected at one end to the opposite outer loop antenna 123 of the second connecting antenna 126. One end.

In view of the above, the ZigBee and GPS dual-purpose antenna module 100 can excite the ZigBee frequency band via the first spiral portion N1 and the second spiral portion N2. Among them, the ZigBee band is 922 MHz.

The first spiral portion N1 and the second spiral portion N2 may have a spacing d, the number of turns of the first spiral portion N1 is smaller than the number of spiral turns of the second spiral portion N2, and the spiral pitch of the first spiral portion N1 is greater than the second The helical pitch of the spiral portion N2. For example, a preferred distance between the first spiral portion N1 and the second spiral portion N2 is 5 mm; the first spiral portion N1 has a number of turns of 4 turns, and the distance between the turns is 4 mm, and the second The number of turns of the spiral portion N2 is 12 turns and is adjacent to each other; the diameter of the spiral of the first spiral portion N1 and the second spiral portion N2 is 3.4 mm; the height of the spiral monopole antenna is 49 mm, and the wire diameter is 0.5. PCT. However, the above is only an example and is not limited thereto.

However, the ZigBee and GPS dual-purpose antenna module 100 can excite the GPS band via the first inner arc antenna 125 (as shown in Figure 3, point B to point E). Among them, the GPS frequency band is 1584MHz.

On the other hand, the ZigBee and GPS dual-purpose antenna module 100 can excite the satellite frequency band via the second inner arc antenna 127 (points C to F as shown in FIG. 3). Among them, the satellite frequency band is 1620MHz.

Further, the feed point (such as point A shown in FIG. 3) is connected to the first connection antenna 124 to one end of the ground plane (as shown by point B in FIG. 3) of 12.3 mm, and the first connection antenna 124 is connected. One end of the ground (such as point B shown in FIG. 3) is spaced from the first inner arc antenna 125 by one end of the first connecting antenna 124 (as shown in FIG. 3) by 33 mm, and the second connecting antenna 126 is connected. One end of the ground plane (such as point C shown in FIG. 3) is spaced from the second inner arc antenna 127 by one end of the second connecting antenna 126 (as shown by the F point in FIG. 3) by 38 mm, and the feeding point (eg, The point A shown in Fig. 3) is counterclockwise along the outer ring antenna 123 to the outer ring antenna 123 at one of the ground planes (as shown by the point D in Fig. 3). The distance is 26.25 mm.

In addition, the substrate 121 can be an FR4 substrate. The lower edge of the preferred loop antenna 122 is 6 mm from the upper edge of the substrate 121; the ground plane has a diameter of 60 mm and a thickness of 0.4 mm; and the loop antenna 122 has a thickness of 0.2 mm. The outer loop antenna 123 has a diameter of 56 mm and a width of 2.5 mm, and the outer loop antenna 123 is spaced apart from the first inner arc antenna 125 (or the second inner arc antenna 127) by 8 mm; the first inner arc antenna 125 (or the second inner arc antenna 127) has a diameter of 35 mm and a width of 2.5 mm; the first connecting antenna 124 (or the second connecting antenna 126) has a width of 2 mm. However, the above is only an example and is not limited thereto.

Please refer to FIG. 4, which is a second schematic diagram of the ZigBee and GPS dual-purpose antenna module of the present invention. As shown in the figure, the ZigBee and GPS dual-purpose antenna module 100 of the present invention may further include a cover 130, and the spiral monopole antenna 110 and the patch antenna 120 connected to each other are disposed in the cover 130.

As described above, the ZigBee and GPS dual-purpose antenna module of the present invention can externally connect the spiral monopole antenna to the patch antenna, thereby exciting the 922 MHz ZigBee frequency band by the spiral monopole antenna, and exciting by the patch antenna. The 1584MHz GPS band and the 1620MHz satellite band achieve the effect of external antennas and multi-band excitation.

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‧‧‧ZigBee and GPS Dual Antenna Module

110‧‧‧Spiral monopole antenna

120‧‧‧SMD antenna

121‧‧‧Substrate

122‧‧‧Circular antenna

123‧‧‧Outer loop antenna

124‧‧‧First connection antenna

125‧‧‧First inner arc antenna

126‧‧‧Second connection antenna

127‧‧‧Second inner arc antenna

130‧‧‧ cover

D‧‧‧ spacing

N1‧‧‧ first spiral

N2‧‧‧ second spiral

The first figure is the first schematic diagram of the ZigBee and GPS dual-purpose antenna module of the present invention. Figure 2 is a schematic diagram of a spiral monopole antenna of the ZigBee and GPS dual-purpose antenna module of the present invention. Figure 3 is a schematic diagram of the patch antenna of the ZigBee and GPS dual-purpose antenna module of the present invention. Figure 4 is a second schematic diagram of the ZigBee and GPS dual-purpose antenna module of the present invention.

Claims (10)

A ZigBee and GPS dual-purpose antenna module includes: a spiral monopole antenna comprising: a first spiral portion; and a second spiral portion connected to one end of the first spiral portion at one end; and a patch The antenna is connected to the other end of the second spiral portion. The patch antenna includes: a substrate having a surface opposite to the spiral monopole antenna; and a loop antenna disposed on the substrate On one side, the loop antenna includes: an outer loop antenna connected to the ground plane at one place and having a feed point; a first connection antenna connected to the feed point at one end and connected to the ground plane at the other end; a first inner arc antenna is connected at one end to the first connecting antenna to one end of the outer loop antenna; and a second connecting antenna is connected at one end to the outer loop antenna relative to the feeding point, and the other end is connected to the connecting end And a second inner arc antenna connected to one end of the second connecting antenna opposite to the outer loop antenna. The ZigBee and GPS dual-purpose antenna module according to claim 1, wherein the ZigBee and GPS dual-purpose antenna module excites a ZigBee frequency band via the first spiral portion and the second spiral portion. For example, the ZigBee and GPS dual-purpose antenna module described in claim 2, wherein the ZigBee band is 922 MHz. The ZigBee and GPS dual-purpose antenna module according to claim 1, wherein the first spiral portion and the second spiral portion have a spacing, and the first spiral portion has a smaller number of spiral turns than the second spiral The number of turns of the portion, and the helical pitch of the first spiral portion is greater than the helical pitch of the second spiral portion. The ZigBee and GPS dual-purpose antenna module according to claim 1, wherein the ZigBee and GPS dual-purpose antenna module excites a GPS frequency band via the first internal arc antenna. For example, the ZigBee and GPS dual-purpose antenna module described in claim 5, wherein the GPS frequency band is 1584 MHz. The ZigBee and GPS dual-purpose antenna module according to claim 1, wherein the ZigBee and GPS dual-purpose antenna module excites a satellite frequency band via the second internal arc antenna. For example, the ZigBee and GPS dual-purpose antenna module described in claim 7 wherein the satellite frequency band is 1620 MHz. The ZigBee and GPS dual-purpose antenna module according to claim 1, wherein the feeding point is 12.3 mm from one end of the grounding surface of the first connecting antenna, and the first connecting antenna is connected to the grounding surface. One end of the first inner arc antenna is opposite to one end of the first connecting antenna, and the second connecting antenna is connected to one end of the grounding surface, and the second inner arc antenna is opposite to one end of the second connecting antenna by 38 mm. The feed point is counterclockwise along the outer loop antenna to the outer loop antenna at a distance of one of the ground planes of 26.25 mm. The ZigBee and GPS dual-purpose antenna module according to claim 1, further comprising a cover body, wherein the spiral monopole antenna and the patch antenna are connected to the cover body.