CN1953272B - multi-band antenna - Google Patents

Abstract

The invention relates to a multi-band antenna, which comprises a substrate, a plurality of antenna areas and a three-dimensional antenna part. The antenna areas are formed on the substrate in a printed circuit mode, the roots of the antenna areas are parallel to each other, and the antenna areas extend in the opposite direction at the extending parts of the antenna areas. The three-dimensional antenna part is separated from the substrate by a certain distance through the connecting column and is parallel to the substrate.

Description

multi-band antenna

【Technical field】

The present invention relates to a multi-band antenna, especially an antenna with a special structure arranged on a substrate to receive signals of different frequency bands.

【Background technique】

Nowadays, due to the increasing demand of consumers for mobile computing, portable notebook computers (Notebook PCs) and handheld computers (Personal Digital Assistant, PDA) are becoming more and more popular among consumers. At the same time, with the increasing demand for mobile computing, a wireless network module that can connect to the Internet (Internet) anytime and anywhere has also become a basic equipment for notebook computers. These wireless network modules such as: 802.11a, 802.11b, 802.11g and other wireless network interfaces are collectively referred to as WiFi (Wireless Fidelity) interfaces, and the operating frequency bands are 2.4GHz (802.11b, 802.11g) and 5GHz (802.11a). In the frequency bands used by the GSM (Global System for Mobile Telecommunications) mobile phone system, such as 900MHz, 1800MHz, 1900MHz, 2100MHz, etc., if within the coverage area of the mobile phone base station, you can also use the frequency band provided by the mobile phone operator. The frequency band achieves the purpose of surfing the Internet. In addition to the demand for Internet access, the popularization of wireless peripheral devices such as wireless keyboards and wireless mice also makes notebook computers often equipped with wireless communication modules that can transmit signals with wireless peripheral devices, such as Bluetooth Modules. The operating frequency band is 2.4GHz.

To sum up, since users' needs for wireless transmission often include wireless Internet access devices, wireless peripheral devices, etc., a mobile computing device must be equipped with antennas capable of receiving different frequency bands. In the prior art, on a mobile computing device, such as a notebook computer, antennas of various frequency bands need to be set separately. In this way, not only do multiple antenna connection locations need to be reserved on the mechanism, but also each antenna needs a separate transmission channel to transmit signals to the computing and processing device in the notebook computer. This will not only increase the manufacturing cost of the relevant mechanism, but also must use a variety of different transmission wires to transmit the signals of different antenna modules. In pursuit of the design requirements of light, thin and small notebook computers, it will increase the design difficulty and make it difficult to reduce the manufacturing cost. cause inconvenience to users.

【Content of invention】

The main purpose of the present invention is to provide a multi-band antenna, especially an antenna with a special structure disposed on a substrate for receiving signals of different frequency bands.

To achieve the above purpose, the present invention provides a multi-band antenna, which includes a substrate, several antenna areas, and a three-dimensional antenna portion. The plurality of antenna areas are formed on the substrate in the form of a printed circuit, and the roots of the plurality of antenna areas are parallel to each other and extend in opposite directions at the extension portion. The three-dimensional antenna part is separated from the substrate by a certain distance through the connecting column and is parallel to the substrate.

Specifically, one aspect of the present invention provides a multi-band antenna, which includes a substrate, a three-dimensional antenna portion, a third antenna area, and a filtering device; a first antenna area and a second antenna area are provided on the first surface of the substrate For receiving wireless signals, the first antenna area and the second antenna area each have a root portion and an extension portion, the roots of the first antenna area and the second antenna area protrude in parallel, and the first antenna area and the second antenna area The two antenna areas extend in opposite directions; the three-dimensional antenna part is electrically connected to the first antenna area and the second antenna area, and is separated from the substrate by a preset distance and parallel to the substrate; the third antenna area Located on the second surface of the substrate, the third antenna area has a root portion and an extension portion, and the extension portion of the third antenna area extends toward the extension direction of the extension portion of the second antenna area; the filtering device passes through a transmission line It is electrically connected with the first antenna area and the second antenna area to separate received signals of different frequency bands.

The present invention also provides a multi-band antenna, which includes a substrate, a first antenna area and a second antenna area are arranged on the first surface of the substrate for receiving wireless signals, the first antenna area and the second antenna Each area has a root portion and an extension portion, the roots of the first antenna area and the second antenna area extend out in parallel, and the first antenna area and the second antenna area extend in opposite directions to each other, a three-dimensional antenna portion, The three-dimensional antenna part is electrically connected to the first antenna area and the second antenna area, and is separated from the substrate by a preset distance and parallel to the substrate; a third antenna area is provided on the second surface of the substrate, The third antenna area has a root portion and an extension portion, and the extension portion of the third antenna area extends toward the extension direction of the extension portion of the second antenna area.

The multi-band antenna of the present invention can receive signals of different frequency bands. When the multi-band antenna of the present invention is applied to electronic equipment, it can not only effectively reduce the number of required antennas, but also avoid the disadvantage that different antennas need to be provided with separate transmission wires.

【Description of drawings】

FIG. 1 is a schematic diagram of the appearance of the multi-band antenna of the present invention.

FIG. 2 is a schematic diagram of the rear structure of the multi-band antenna of the present invention.

FIG. 3 is a schematic diagram of a multi-band antenna connected with a filter according to the present invention.

FIG. 4 is a schematic structural diagram of a transmission line.

Fig. 5 is a spectrum analysis result of the multi-band antenna of the present invention.

【Detailed ways】

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a multi-band antenna 10 according to the present invention. The multi-band antenna 10 includes a substrate 20, which can be a printed circuit board, on which the antenna area A and the antenna area B are plated with a metal material, and the metal material can be copper or other metals with good conductivity. Each of the antenna area A and the antenna area B has a root portion and an extension portion. The antenna area A and the antenna area B protrude from the roots parallel to each other, and the extension portions of the two antenna areas extend in opposite directions. As shown in the preferred embodiment of the present invention shown in Figure 1, the antenna area A and the antenna area B protrude from the roots in parallel thin strips, and gradually extend in the opposite direction in the extension of the antenna area in a circular arc sector, wherein the antenna area A The extension area is larger than the extension area of the antenna area B to achieve a good reception effect. The combination of antenna area A and antenna area B can receive wireless signals in wireless frequency bands such as GSM frequency band and Wi-Fi (Wireless Fidelity) frequency band, including 900MHz-2.4GHz and 5GHz frequency bands.

The root of the antenna area A and the antenna area B is provided with a welding pad area for soldering of the connecting circuit. A pad 60 is provided at the root of the antenna area A, and a pad area 50 is provided at the root of the antenna area B. As shown in FIG. The welding pad 60 in the antenna area A can be used for soldering and connecting the circuit for transmitting the antenna signal. The pad area 50 of the antenna area B can be used for soldering the circuit connection of the ground terminal. The root of antenna area B extends to both sides.

A three-dimensional antenna part 30 is welded on the multi-band antenna 10. The three-dimensional antenna part 30 is made of metal material, such as copper sheet or other metals with good conductivity, and has two connecting posts 32, 34. The connection post 32 is fixed on the pad 60 , and the other connection post 34 is fixed on the pad region 50 . The three-dimensional antenna part 30 maintains a distance of about 1-2 cm from the substrate 20 through the connecting posts 32 , 34 (depending on actual application) and is parallel to the substrate 20 . The three-dimensional antenna part 30 can cooperate with the antenna area A and the antenna area B on the substrate 20 to enhance the reception effect of 900MHz, 1800MHz and 1900MHz in the GSM (Global System for Mobile Telecommunications) frequency band, wherein the three-dimensional antenna part 30 extends a longer area The block can enhance the reception effect of the GSM frequency band 900MHz, and the shorter blocks in the three-dimensional antenna part 30 can enhance the reception effect of the GSM frequency band 1800MHz and 1900MHz.

See Figure 2. FIG. 2 shows the back structure of the substrate 20 . The back of the substrate 20 is plated with an antenna area C made of metal, which can be copper or other metals with good conductivity. The extended portion of the antenna area C is a fan-shaped area, which is the same as the fan-shaped area of the extended portion of the antenna area B and is located on the same side of the back of the antenna area B. The antenna area C is electrically connected to the antenna area B, and the root area of the antenna area C is larger than the root area of the antenna area B.

See Figure 3. FIG. 3 is a schematic diagram of the connection between the multi-band antenna 10 and a filter 90 according to the present invention. The filter 90 is electrically connected to the pads 50 and 60 on the antenna area A and the antenna area B via a transmission line 80 . The filter 90 can receive the signal received by the multi-band antenna 10, and separate the signal of the GSM frequency band and the Wi-Fi (Wireless Fidelity) frequency band (the Wi-Fi frequency band is about 2.4GHz) in the signal for other Applications of signal processing devices. The transmission line 80 is also electrically connected to the pad 50 and the ground terminal through a ground wire 82 or by direct welding.

See Figure 4. FIG. 4 is a schematic structural diagram of the transmission line 80 . The transmission line 80 is a single-core coaxial cable, which has a signal wire 84 , an inner insulation layer 85 , a metal mesh layer 86 and an outer insulation coating layer 87 . The signal wire 84 is used for transmitting the signal received by the antenna. The inner insulation layer 85 can prevent the signal wire 84 from being connected to the metal mesh layer 86 . The metal mesh layer 86 can be used to connect to the ground, and can shield electromagnetic interference generated by external electromagnetic waves or electromagnetic fields, so as to prevent external electromagnetic interference from affecting the signal transmitted on the signal wire 84 . The outer insulation coating layer 87 is used to cover the inner wires and provide protection.

See Figure 5. FIG. 5 is a schematic diagram of the receiving effect of the multi-band antenna of the present invention. FIG. 5 shows the experimental results of the multi-band antenna 10 of the present invention measured by a spectrum analyzer. Generally speaking, the transmission loss required by the GSM band and Wi-Fi band antenna design specifications must be less than -10dB. As shown in the spectrum analysis result of Fig. 5, the emission loss of the multi-band antenna of the present invention in each main frequency band is all less than -10dB, as the loss in the 900MHz frequency band is -18.117dB, the loss in the 1800MHz frequency band is -12.046dB, in The loss in the 1900MHz band is -18.754dB, the loss in the 2.4GHz band is -13.758dB, the loss in the 2.5GHz band is -12.518dB, the loss in the 4.9GHz band is -19.989dB, and the loss in the 5.85GHz band is - 26.243dB. Therefore, the multi-band antenna of the present invention can achieve the receiving effect required by the design specifications in the frequency bands to be received.

The special structure of the multi-band antenna module of the present invention can be used to receive wireless signals in frequency bands such as 900MHz-2.4GHz and 5GHz. In addition, the three-dimensional part of the antenna is used to enhance the receiving effect of specific frequency bands, and multiple different frequency bands are integrated through a single transmission channel. The signal, and then use the filter device to separate the signals received in different frequency bands. Therefore, when the multi-band antenna of the present invention is applied to electronic equipment, it can not only effectively reduce the number of required antennas, but also avoid the disadvantage that different antennas need to be provided with separate transmission wires. Therefore, the multi-band antenna of the present invention can not only reduce the difficulty of antenna design and manufacturing cost, but also increase the application range of the antenna.

Claims (8)

1. A multi-band antenna, characterized in that: it comprises a substrate, a three-dimensional antenna portion, a third antenna area and a filtering device; the first surface of the substrate is provided with a first antenna area and a second antenna area for receiving For wireless signals, the first antenna area and the second antenna area each have a root portion and an extension portion, the roots of the first antenna area and the second antenna area protrude in parallel, and the first antenna area and the second antenna area Extending in opposite directions; the three-dimensional antenna part is electrically connected to the first antenna area and the second antenna area, and is separated from the substrate by a predetermined distance and parallel to the substrate; the third antenna area is located on the On the second surface of the substrate, the third antenna area has a root portion and an extension portion, and the extension portion of the third antenna area extends toward the extension direction of the extension portion of the second antenna area; the filtering device communicates with the first antenna area through a transmission line The first antenna area and the second antenna area are electrically connected to separate received signals of different frequency bands. 2. The multi-band antenna as claimed in claim 1, wherein the first antenna area, the second antenna area and the third antenna area are formed on the substrate by means of printed circuits. 3. The multi-band antenna according to claim 2, wherein the second antenna area and the third antenna area are electrically connected to a ground terminal. 4. The multi-band antenna according to claim 1, wherein the three-dimensional antenna part is a copper sheet having a long block and a short block, and the long block and the short block are respectively used to strengthen different frequency bands reception effect. 5. The multi-band antenna according to claim 1, wherein the filter device can separate the signals of the GSM frequency band and the Wi-Fi frequency band. 6. A multi-band antenna, characterized in that: it includes a substrate, a first antenna area and a second antenna area are provided on the first surface of the substrate for receiving wireless signals, the first antenna area and the second antenna Each area has a root portion and an extension portion, the roots of the first antenna area and the second antenna area extend out in parallel, and the first antenna area and the second antenna area extend in opposite directions to each other, a three-dimensional antenna portion, The three-dimensional antenna part is electrically connected to the first antenna area and the second antenna area, and is separated from the substrate by a preset distance and parallel to the substrate; a third antenna area is provided on the second surface of the substrate, The third antenna area has a root portion and an extension portion, and the extension portion of the third antenna area extends toward the extension direction of the extension portion of the second antenna area. 7. The multi-band antenna as claimed in claim 6, wherein the first antenna area, the second antenna area and the third antenna area are formed on the substrate by a printed circuit. 8. The multi-band antenna according to claim 7, wherein the second antenna area and the third antenna area are electrically connected to a ground terminal.

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