CN201927708U - Indoor Dual Polarized Omnidirectional Antenna - Google Patents

Abstract

The embodiment of the utility model relates to an indoor dual-polarization omnidirectional antenna, which includes a metal reflector, a vertically polarized antenna whose axis is perpendicular to the metal reflector and fixed thereon, and a horizontally polarized antenna fixed above the vertically polarized antenna. The indoor dual-polarization omnidirectional antenna of the embodiment of the utility model has a unique structure of an indoor antenna that covers a wider frequency band and has a higher gain. On the one hand, it meets the signal coverage requirements of the wide frequency band, avoids the generation of indoor communication blind spots, and improves the quality of mobile communication services. On the other hand, it avoids the problem of repeated antenna construction caused by multi-band coverage, and meets the requirements of energy conservation and emission reduction.

Description

Indoor Dual Polarized Omnidirectional Antenna

technical field

The utility model relates to the field of antennas, in particular to an indoor dual-polarized omnidirectional antenna.

Background technique

At present, the transmission and coverage of indoor signals is an important part of mobile communication, which is completed by the indoor distribution system. Traditional 2G indoor distribution systems (GSM 800MHz systems, etc.) generally use single-polarized antennas, and future 3G systems have higher requirements for signal polarization multiplexing, and single-polarized antennas are no longer suitable for this requirement. In addition, 2G indoor distribution The system is often around 1GHz signal frequency such as 800MHz, 900MHz, the wavelength of the signal is longer, and the indoor environment has little influence on electromagnetic waves. In contrast, the frequency band of the 3G system is generally higher, such as the frequency band of the TD-SCDMA system is 1880-2025MHz , the frequency band of its evolution system TD-LTE is as high as 2570-2620MHz, the penetration ability of electromagnetic waves is greatly weakened, and the probability of blind spots indoors is significantly increased. With the further development of mobile communications, 2G, 3G and 3G+ indoor distribution systems will coexist for a long time, so it is necessary to develop an indoor distribution system covering the above frequency bands at the same time.

Utility model content

The technical problem to be solved by the embodiments of the utility model is to provide an indoor omni-directional antenna with wider frequency band coverage, higher gain and two different polarizations, so as to avoid indoor communication blind spots and improve mobile communication service quality.

In order to solve the above technical problems, an indoor dual-polarized omnidirectional antenna is provided, including a metal reflector, a vertically polarized antenna whose axis is perpendicular to the metal reflector and fixed thereon, and a vertically polarized antenna fixed on the vertically polarized Horizontally polarized antenna above the antenna.

Further, the vertically polarized antenna is a hollow metal monopole, the upper part of which is in the shape of a cuboid with an arc transition between the sides, and the lower part is in the shape of a tetrahedral pyramid gathered along the bottom edge of the sides.

Further, the horizontally polarized antenna includes several dipole antennas arranged on a horizontal coplanar plane with equal angles to each other, and the dipole antennas are designed in an integrated manner.

Further, the horizontally polarized antenna includes at least two rotationally symmetrical dipole antennas.

Further, the lower end of the dipole antenna is fixed on the vertically polarized antenna or the metal reflector through a first support, and the lower end of the vertically polarized antenna is fixed on the metal reflector through a second support; Both the first support body and the second support body are made of insulating materials.

Further, the dipole antenna is etched on the same printed circuit board.

Further, a power dividing network electrically connected to the dipole antenna is also etched on the printed circuit board, and isolation resistors are arranged between branch circuits of the power dividing network.

Further, a metal sheet is electrically connected between the metal reflector and the vertically polarized antenna.

Further, the indoor dual-polarized omnidirectional antenna also includes a first feeding network for feeding the horizontally polarized antenna, and a second feeding network for feeding the vertically polarized antenna, the first A feed network includes a first radio frequency connector arranged on the metal reflector, and a feed cable with one end connected to the horizontally polarized antenna and the other end connected to the first radio frequency connector; The second feeding network includes a second radio frequency connector arranged on the back of the metal reflector.

Further, the feeder cable is a coaxial cable whose outer core is electrically connected to the metal reflector and the first radio frequency connector at the same time.

The above technical solution has at least the following beneficial effects:

By providing an indoor dual-polarized omnidirectional antenna, which includes a metal reflector, a vertically polarized antenna whose axis is perpendicular to the metal reflector and fixed thereon, and a horizontally polarized antenna fixed above the vertically polarized antenna, it can It provides a unique structure of indoor antenna covering wider frequency band and higher gain. On the one hand, it meets the signal coverage requirements of wide frequency band, avoids indoor communication blind spots, and improves the service quality of mobile communication. The problem of redundant antenna construction caused by frequency band coverage meets the requirements of energy saving and emission reduction.

Description of drawings

Fig. 1 is a perspective view of an indoor dual-polarized omnidirectional antenna according to an embodiment of the present invention.

Fig. 2 is another perspective view of the indoor dual-polarized omnidirectional antenna according to the embodiment of the present invention.

Fig. 3 is a top view of the indoor dual-polarized omnidirectional antenna of the embodiment of the present invention.

Detailed ways

As shown in Figures 1 to 3, the embodiment of the utility model provides an indoor dual-polarized omnidirectional antenna, which mainly includes a metal reflector 1, a metal reflector 1 whose axis is perpendicular to the metal reflector 1 and fixed on the metal reflector 1 A vertically polarized antenna 2, and a horizontally polarized antenna 3 fixed above the vertically polarized antenna 2, so that the indoor dual-polarized omnidirectional antenna can include two different polarizations, vertical and horizontal, through the combination of such a special structure, On the one hand, it meets the requirements of wide-band signal coverage and high gain, avoids indoor communication blind spots, and improves the quality of mobile communication services. On the other hand, it avoids the problem of repeated construction of antennas caused by multi-band coverage. platoon requirements. specifically:

The vertically polarized antenna 2 is a hollow metal monopole, and its upper part 4 is in the shape of a cuboid with the arc surface 6 transitioning between the sides 5, and the lower part 7 is in the shape of a four-sided pyramid that gathers along the bottom edge of the side 5. This ultra-wideband vertical pole The monopole antenna is set on the metal reflector 1, and its frequency band can be set to 880-2690 MHz, which can cover all 2G, 3G and 3G+ frequency bands.

The horizontally polarized antenna 3 includes a number of dipole antennas 8 arranged on a horizontal coplanar plane and having equal angles to each other. The dipole antenna 8 is an integrated design. The horizontally polarized antenna 3 is at a certain height above the metal reflector 1, and its frequency band It can be set to 1880-2690MHz, which can cover the TD-SCDMA frequency band, and then can realize polarization multiplexing of two different polarizations on the TD-SCDMA frequency band, which has the beneficial effect of improving the signal coverage and utilization capability of this frequency band.

In this embodiment, the horizontally polarized antenna 3 includes at least two rotationally symmetrical dipole antennas 8 , of course, other numbers of dipole antennas 8 can also form the above-mentioned horizontally polarized antenna 3 .

The lower end of the above-mentioned dipole antenna 8 is fixed on the vertically polarized antenna 2 or the metal reflector 1 through the first support body 9, so as to maintain the stability of the horizontally polarized antenna 3, and the lower end of the vertically polarized antenna 2 passes through the second support body 10 It is fixed on the metal reflector 1 to maintain the stability of the vertically polarized antenna 2, and both the first support body 9 and the second support body 10 are made of insulating materials.

Each dipole antenna 8 is etched on the same printed circuit board to further reduce the coupling between horizontal and vertical polarization and improve polarization isolation.

In addition, a power dividing network 11 electrically connected to the dipole antenna 8 is also etched on the above-mentioned printed circuit board, and an isolation resistor 12 is arranged between each branch circuit of the power dividing network 11 to reduce the distance between each branch circuit. coupling effect.

A metal sheet is electrically connected between the metal reflector 1 and the vertically polarized antenna 2 , and the function of the metal sheet is to DC ground the vertically polarized antenna 2 for lightning protection.

The indoor dual-polarized omnidirectional antenna also includes a first feeding network for feeding the horizontally polarized antenna 3, and a second feeding network for feeding the vertically polarized antenna 2, wherein the first feeding network includes The first RF connector 13 on the back of the metal reflector 1, and the feed cable 14 connected to the horizontally polarized antenna 3 at one end and connected to the first RF connector 13 at the other end, the feed cable 14 can pass through the metal reflector 1 ; The second feeding network includes a second radio frequency connector 15 arranged on the back of the metal reflector 1 . The main port of the power dividing network 11 is led out by the feeder cable 14 through the vertically polarized antenna 2 and connected to the first radio frequency connector 13 on the back of the metal reflector 1 .

As an implementation, the feeder cable 14 can be a coaxial cable whose outer core is electrically connected to the metal reflector 1 and the first radio frequency connector 13 at the same time. The purpose of electrically connecting the outer core to the metal reflector 1 is to connect the horizontal pole The antenna 3 is DC grounded to play the role of lightning protection.

The above is a specific embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. These improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (10)

1. A kind of indoor double-polarized omnidirectional antenna, it is characterized in that, comprise metal reflector, axis is perpendicular to described metal reflector and the vertically polarized antenna that is fixed on it, and is fixed on described vertically polarized antenna top horizontally polarized antenna. 2. The indoor dual-polarized omnidirectional antenna according to claim 1, wherein the vertically polarized antenna is a hollow metal monopole, the upper part of which is in the shape of a rectangular parallelepiped with an arc transition between the sides, and the lower part is in the shape of a hollow metal monopole. A four-sided pyramid shape gathered along the base of the sides. 3. indoor dual-polarized omnidirectional antenna as claimed in claim 1, is characterized in that, described horizontally polarized antenna comprises some dipole antennas that horizontal coplanar arrangement and mutual included angle are equal, and described dipole The antenna is an integrated design. 4. indoor dual-polarized omnidirectional antenna as claimed in claim 3, is characterized in that, described horizontally polarized antenna comprises at least two dipole antennas that rotational symmetry is arranged. 5. indoor dual-polarized omnidirectional antenna as claimed in claim 3, is characterized in that, the lower end of described dipole antenna is fixed on described vertically polarized antenna or metal reflecting plate by first supporting body, and described vertically The lower end of the polarized antenna is fixed on the metal reflector through the second support body; both the first support body and the second support body are made of insulating materials. 6. The indoor dual-polarized omnidirectional antenna according to claim 3, wherein the dipole antenna is etched on the same printed circuit board. 7. indoor dual-polarization omnidirectional antenna as claimed in claim 6, is characterized in that, on described printed circuit board, is also etched with the power dividing network that is electrically connected with described dipole antenna, and described power dividing An isolation resistor is set between each branch circuit of the network. 8. The indoor dual-polarized omnidirectional antenna according to any one of claims 1 to 7, wherein a metal sheet is electrically connected between the metal reflector and the vertically polarized antenna. 9. The indoor dual-polarized omnidirectional antenna according to any one of claims 1 to 7, wherein the indoor dual-polarized omnidirectional antenna also includes a first feed for the horizontally polarized antenna A feed network, and a second feed network for feeding the vertically polarized antenna, the first feed network includes a first radio frequency connector arranged on the metal reflector, and one end is connected to the The other end of the horizontally polarized antenna is connected to the feeding cable of the first radio frequency connector; the second feeding network includes a second radio frequency connector arranged on the back of the metal reflector. 10. The indoor dual-polarized omnidirectional antenna according to claim 9, wherein the feeder cable is a coaxial cable whose outer core is electrically connected to the metal reflector and the first radio frequency connector at the same time.

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