CN201017988Y - Multi-band GSM Antenna - Google Patents

Abstract

The utility model discloses a multifrequency section GSM antenna, it includes a base plate, a signal connection end, a ground connection portion, a high band radiation portion, a low band radiation portion, a coupling resonance radiation portion and an impedance matching portion, wherein this signal input end, ground connection portion, high band radiation portion, low band radiation portion, coupling resonance radiation portion all sets up in the peripheral region of base plate with lithographic circuit's form with impedance matching portion, with other antenna mutual interference when avoiding this multifrequency section GSM antenna to function, or receive the interference of other subassemblies of antenna module, so the utility model discloses a multifrequency section GSM antenna is suitable for and integrates in an antenna module jointly with the antenna of other frequency channels, and can not arouse mutual interference.

Description

Multi-band GSM Antenna

【Technical field】

The utility model relates to a multi-band GSM antenna, in particular to a multi-band GSM antenna capable of receiving signals of different GSM frequency bands and avoiding being interfered by antenna modules of other frequencies.

【Background technique】

With the development of global positioning system (Global Positioning System, GPS) technology, satellite navigation equipment for vehicles is becoming more and more popular. In addition to the satellite navigation equipment installed by ordinary consumers in the car, the driver can know the current location and direction of the vehicle. , Commercial vehicles can further use the wireless network in the GSM (Global System for Mobile Communications) frequency band to send vehicle-related information back to the vehicle management center, making the delivery management of commercial vehicles more efficient.

However, the diversification of antenna specifications for vehicles, such as GPS antennas, GSM antennas, or digital TV antennas, also causes troubles when installing antennas in vehicles. If various antennas are installed separately, it will cause inconvenience due to frequent construction, and may cause damage to the car body, and the cost of installing multiple antennas separately is also relatively expensive; When using, it may cause mutual interference when the antennas of each frequency band operate at the same time.

Therefore, it is necessary to provide a multi-band GSM antenna that can integrate and receive signals of each frequency band, and avoid the problem of mutual interference with antennas of other frequency bands when receiving or transmitting GSM frequency band signals, so as to ensure the reliability of signal reception in each frequency band , and reduce the cost of antenna installation.

【Content of utility model】

The purpose of the utility model is to provide a multi-band GSM antenna, especially a multi-band GSM antenna capable of receiving signals of different GSM frequency bands and avoiding being interfered by antenna modules of other frequencies.

In order to achieve the above object, the utility model adopts the following technical scheme: a multi-band GSM antenna, which includes a substrate, a signal connection end, a grounding part, a high-frequency radiation part, a low-frequency radiation part, a coupling resonance radiation part and an impedance matching part, wherein the signal input terminal, the ground part, the high frequency radiation part, the low frequency radiation part, the coupling resonance radiation part and the impedance matching part are all arranged on the substrate in the form of a planar circuit. In order to prevent the multi-band GSM antenna from interfering with other antennas during operation, or being interfered by other components of the antenna module, the components of the multi-band GSM antenna are arranged in the peripheral area of the substrate, and the peripheral area is used to radiate signals outward. In order to avoid the signal radiated in the central area of the substrate from being interfered by other antennas or other components of the antenna module. The substrate is roughly circular, and the high-frequency radiation part and the low-frequency radiation part are all arranged in the peripheral area of the substrate in an arc-shaped manner, thereby avoiding the defect of being easily disturbed when they are arranged in the central area of the substrate. The substrate can also be in other shapes, such as square or polygonal, and the high-frequency radiation part and the low-frequency radiation part can also be arranged in other shapes on the peripheral area of the substrate.

Compared with the prior art, the multi-band GSM antenna of the present invention is made of lithographic circuit, and the antenna radiation part is arranged in the peripheral area of the substrate, so as to avoid the signal radiated in the central area of the substrate from being affected by other antennas or antenna modules. Component interference, which is suitable for integrated installation with other antennas, such as GPS antennas, digital TV antennas, etc., without mutual interference.

【Description of drawings】

FIG. 1 is a schematic diagram of an antenna module installed on a vehicle.

Fig. 2 is a detailed structure diagram of the multi-band GSM antenna of the present invention.

Fig. 3 is an efficiency test diagram of the multi-band GSM antenna of the present invention.

【Detailed ways】

Please refer to FIG. 1 , which is a schematic diagram of an antenna module 10 installed on a vehicle 50 . The antenna module 10 is used to receive wireless signals and transmit them to the electronic equipment on the vehicle, or transmit the signals sent by the electronic equipment. The antenna module 10 includes a housing 12 , a three-dimensional antenna 20 and a multi-band GSM antenna 30 . The three-dimensional antenna 20 may include a GPS antenna, a digital TV antenna, and the like. The antenna module 10 can be installed outside or inside the vehicle body of the vehicle 50 . However, no matter whether the antenna module 10 is installed outside the vehicle body or inside the vehicle body, the three-dimensional antenna 20 must face the sky to facilitate GPS signal reception. Therefore, when the antenna module 10 is installed on the outside of the vehicle 50, the multi-band GSM antenna 30 is located below the stereo antenna 20; On the glass (not shown), the multi-band GSM antenna 30 is located above the three-dimensional antenna 20, while the integral antenna module 10 is attached upside down on the windshield, so that the three-dimensional antenna 20 can be kept facing the sky.

Please refer to FIG. 2 , which is a detailed structure diagram of the multi-band GSM antenna 30 of the present invention. The multi-band GSM antenna 30 is a planar monopole (Mono Pole) antenna structure, which includes a substrate 31, a signal connection end 32, a grounding portion 34, a high-frequency radiation portion 36, a low-frequency radiation portion 38, a coupling The resonant radiation part 40 and an impedance matching part 42 . The signal input terminal 32 , the grounding portion 34 , the high frequency radiation portion 36 , the low frequency radiation portion 38 , the coupling resonance radiation portion 40 and the impedance matching portion 42 are all disposed on the substrate 31 in the form of a planar circuit, such as a printed circuit. The signal connection end 32 is used to transmit the signal received by the multi-band GSM antenna 30 to the electronic device, or transmit the signal to be sent by the electronic device to the antenna end for transmission. The ground portion 34 is used for connecting to ground. The high frequency radiation part 36 is used for receiving and transmitting the GSM frequency band 1800MHz and 1900MHz signals, and the low frequency band radiation part 38 is used for receiving and transmitting the GSM frequency band 800MHz and 900MHz signals. The coupling resonant radiation part 40 is used for coupling the signals received or transmitted by the resonant high frequency radiation part 36 and the low frequency radiation part 38 to help enhance the receiving and transmitting performances of the high frequency radiation part 36 and the low frequency radiation part 38 . The impedance matching part 42 is used to adjust the equivalent impedance of the multi-band GSM antenna 30, so that the impedance of the multi-band GSM antenna 30 can match the overall transmission circuit, so as to avoid affecting the signal reception and transmission effect of the multi-band GSM antenna 30.

As mentioned above, since the multi-band GSM antenna 30 must be integrated with the stereo antenna 20 and installed in the antenna module 10, and the stereo antenna 20 must be kept facing the sky, so the multi-band GSM antenna 30 is mostly arranged at the bottom area of the antenna module 10 Simultaneously, in order to avoid the multi-band GSM antenna 30 from interfering with the three-dimensional antenna 20 during operation, or being interfered by other components of the antenna module 10, the components of the multi-band GSM antenna 30 are arranged on the peripheral area of the substrate 31, and the peripheral area is used to The signal is radiated externally to prevent the signal radiated in the central area of the substrate from being interfered by other antennas or other components of the antenna module. As shown in FIG. 2 , the substrate 31 has a substantially circular shape, and the signal connection terminal 32 is disposed on the peripheral edge region of the substrate 31 , close to the centerline of the substrate 31 . The high-frequency radiation part 36, the low-frequency radiation part 38, etc. are all arranged in the peripheral area of the substrate 31 in an arc shape, wherein the low-frequency radiation part 38 is arranged on the right side of the signal connection end 32 in an arc shape, and the low-frequency radiation part 38 is located in the peripheral edge area of the substrate 31 and accounts for about one-third of the circumference of the substrate 31, and the tail end of the low-frequency radiation part 38 is bent inward from the peripheral edge area in parallel for about one-third of the length of the low-frequency radiation part 38 The high frequency radiation part 36 is disposed inside the low frequency radiation part 38 , roughly located in the middle area of the low frequency radiation part 38 , and also located in the peripheral edge area of the substrate 31 . The tail end of the high frequency radiation part 36 is close to the tail end of the low frequency radiation part 38 which is bent inward in parallel. The coupling resonant radiation part 40 is disposed inside the tail end of the high frequency radiation part 36 and the tail end of the low frequency radiation part 38 , and is in the shape of a strip. The impedance matching part 42 is located between the signal connection end 32 and the high frequency radiation part 36 and extends downward from the upper part of the substrate 31 to form a strip-shaped area. The grounding portion 34 is arranged on the peripheral area of the substrate in an arc shape on the side opposite to the high-frequency radiation portion 36 and the low-frequency radiation portion 38. The configuration area and shape of the frequency band radiation part 38 are symmetrical to achieve the effect of a monopole antenna. From the above, the multi-band GSM antenna of the present utility model is provided with components such as the signal connection end 32, the grounding part 34, the high-frequency radiation part 36, the low-frequency radiation part 38, the coupling resonance radiation part 40 and the impedance matching part 42. In the peripheral area of the substrate 31 , the disadvantage of being easily disturbed when it is arranged in the central area of the substrate 31 can be avoided. The substrate 31 can also be in other shapes, such as square or polygonal, and the high-frequency radiation part 36, the low-frequency radiation part 38, or the grounding part 34 can also be arranged in the above-mentioned relative positions on the peripheral area of the substrate 31 of other shapes.

Please refer to FIG. 3 , through experiments, the receiving and transmitting gains of the multi-band GSM antenna 30 are respectively -12.122dB, -25.692dB, -12.002dB and -10.230dB in the GSM frequency bands of 800MHz, 900MHz, 1800MHz and 1900MHz . Because the required receiving and transmitting gain of general GSM antenna is about below-7.5dB, so the multi-band GSM antenna 30 of the present utility model can meet the required receiving and transmitting gain of general GSM antenna through verification, and it is suitable for use with other Integrated installation of antennas, such as GPS antennas, digital TV antennas, etc., without the disadvantage of mutual interference.

The multi-band GSM antenna of the present invention is made of lithographic circuit, and the antenna radiation part is arranged in the peripheral area of the substrate, so as to prevent the signal radiated in the central area of the substrate from being interfered by other antennas or other components of the antenna module. It is suitable for Integrated installation with other antennas, such as GPS antennas, digital TV antennas, etc., without mutual interference.

Claims (11)

1. A multi-band GSM antenna is characterized in that it comprises: a substrate; a signal connection end arranged on the substrate is used to transmit the signal received and emitted by the multi-band GSM antenna; a ground portion arranged on the substrate is used for Connect to ground; the high-frequency radiation part arranged in the peripheral area of the substrate is used to receive and transmit a high-frequency signal; the low-frequency radiation part arranged in the peripheral area of the substrate is used to receive and transmit a low-frequency signal; the coupling provided on the substrate The resonant radiation part is used to couple and resonate the signals received or transmitted by the high-frequency radiation part and the low-frequency radiation part; and the impedance matching part arranged on the above-mentioned substrate is used to adjust the equivalent impedance of the multi-band GSM antenna. 2 . The multi-band GSM antenna according to claim 1 , wherein the substrate is circular, and the high-frequency radiation part and the low-frequency radiation part are arranged on the peripheral area of the substrate in an arc shape. 3 . 3. multi-band GSM antenna as claimed in claim 2, is characterized in that: described grounding part is arranged on the peripheral area of this substrate with circular arc shape, and its position is positioned at this high frequency band radiation part and low frequency band radiation part relative side. 4. multi-band GSM antenna as claimed in claim 3, is characterized in that: described signal connection end is arranged on the peripheral edge region of substrate, near the side of substrate center line; Arranged in the peripheral area of the substrate in an arc shape, wherein the low-frequency radiation part is arranged in an arc shape on the right side of the signal connection end, and the low-frequency radiation part is located in the peripheral edge area of the substrate, accounting for about one-third of the The circumference of the substrate, the tail end of the low-frequency radiation part is bent inward from the peripheral edge area in parallel for about one third of the length of the low-frequency radiation part, and the high-frequency radiation part is arranged on the inner side of the low-frequency radiation part, Located in the middle area of the low-frequency radiation part, and also located in the peripheral edge area of the substrate, the tail end of the high-frequency radiation part is close to the inwardly bent tail end of the low-frequency radiation part; the coupling resonance radiation part is set On the inner side of the tail end of the high-frequency radiation part and the tail end of the low-frequency radiation part, the coupling resonant radiation part is in the shape of a long strip; the impedance matching part is located between the signal connection end and the high-frequency radiation part. The upper part of the substrate extends downwards to form a strip-shaped area; the grounding part is arranged in an arc shape on the side of the peripheral area of the substrate opposite to the high-frequency radiation part and the low-frequency radiation part. The area and shape are symmetrical to the area and shape of the high-frequency radiation part and the low-frequency radiation part. 5. The multi-band GSM antenna according to claim 1, characterized in that: each component on the substrate of the multi-band GSM antenna is formed by a printed circuit. 6. A multi-band antenna module, characterized in that it comprises: a shell; a three-dimensional antenna part arranged in the shell, in order to receive wireless signals; and a multi-band GSM antenna arranged in the shell and corresponding to one side of the three-dimensional antenna part , the multi-band GSM antenna has at least one substrate, the substrate is provided with a signal connection end for transmitting signals received and transmitted by the multi-band GSM antenna, a grounding part for connecting to ground, and a high-frequency radiation part for receiving and transmit a high-frequency signal, a low-frequency radiation part is used to receive and transmit a low-frequency signal, and a coupling resonant radiation part is used to couple and resonate the signal received or transmitted by the high-frequency radiation part and the low-frequency radiation part to match an impedance The part is used to adjust the equivalent impedance of the multi-band GSM antenna, and the high-frequency radiation part and the low-frequency radiation part are arranged on the peripheral area of the substrate. 7. The multi-band antenna module as claimed in claim 6, wherein the stereo antenna comprises one of a GPS antenna and a digital TV antenna. 8 . The multi-band antenna module as claimed in claim 6 , wherein the substrate is circular, and the high-frequency radiation part and the low-frequency radiation part are arranged in an arc shape on a peripheral area of the substrate. 9. The multi-band antenna module as claimed in claim 8, characterized in that: the grounding portion is arranged in a circular arc shape on the peripheral area of the substrate, and its position is located on a side opposite to the high-frequency radiation portion and the low-frequency radiation portion side. 10. The multi-band antenna module as claimed in claim 9, characterized in that: the signal connection end is set at the peripheral edge area of the substrate, on a side close to the centerline of the substrate; the high-frequency radiation part is connected to the low-frequency The radiation part is arranged in the peripheral area of the substrate in an arc shape, wherein the low-frequency radiation part is arranged in an arc shape on the right side of the signal connection end, and the low-frequency radiation part is located in the peripheral edge area of the substrate, accounting for about one-third The circumference of the substrate is 1, the tail end of the low-frequency radiation part is bent inward from the peripheral edge area in parallel for about one third of the length of the low-frequency radiation part, and the high-frequency radiation part is arranged at the bottom of the low-frequency radiation part The inner side is roughly located in the middle region of the low-frequency radiation part, and is also located in the peripheral edge region of the substrate, and the tail end of the high-frequency radiation part is close to the inwardly parallel-bent tail end of the low-frequency radiation part; the coupling resonance The radiation part is arranged on the inner side of the tail end of the high frequency radiation part and the low frequency radiation part, and the coupling resonant radiation part is in the shape of a strip; the impedance matching part is located between the signal connection end and the high frequency radiation part, Extending downward from the upper part of the substrate to form a strip-shaped area; the grounding part is arranged in an arc shape on the side of the peripheral area of the substrate opposite to the high-frequency radiation part and the low-frequency radiation part, and the grounding part The setting area and shape are symmetrical to the setting area and shape of the high-frequency radiation part and the low-frequency radiation part. 11. The multi-band antenna module according to claim 6, wherein the components on the substrate of the multi-band GSM antenna are formed by printed circuit.

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