WO2014036706A1

WO2014036706A1 - Antenna and antenna system

Info

Publication number: WO2014036706A1
Application number: PCT/CN2012/081057
Authority: WO
Inventors: 郭昕; 柳涛
Original assignee: 华为技术有限公司
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2014-03-13
Also published as: CN103026552B; CN103026552A

Abstract

Embodiments of the present invention relate to an antenna and an antenna system. The antenna comprises a two-wire polarized oscillator in the ±45 degree polarized orthogonal arrangement, comprising a first antenna oscillator and a second antenna oscillator; and a synthesis signal generation unit that is electrically coupled with the first antenna oscillator and the second antenna oscillator, the first antenna oscillator and the second antenna oscillator emitting synthesis signals that are generated by the synthesis signal generation unit, so as to make the synthesis signals to form circularly polarized signals in the space. According to the embodiments of the present invention, the circularly polarized signals can be realized without changing existing antenna oscillators and feed networks, so that the power equalization of a terminal receiving polarized diversity signals is improved, and reconstruction of existing antennas is facilitated, thereby reducing the cost of updating the antenna equipment.

Description

Antenna and antenna system

Embodiments of the present invention relate to the field of wireless communications, and more particularly to antennas and antenna systems. Background technique

Traditionally, a single vertical polarization directional antenna has been used in public mobile communication systems. With the development of wireless communication technology, in order to improve system capacity, multiple input multiple output (Multiple Input Multiple Output) technology has been proposed, which has created a demand for multi-column antennas. When a single-polarized antenna implements a multi-column antenna, the spacing of each column of the single-polarized antenna is large due to the isolation requirement, resulting in a large volume of the entire antenna. Therefore, the polarization orthogonality characteristic of electromagnetic waves is developed to design a large number of antennas. The column antenna achieves the purpose of satisfying the isolation requirement between the multi-column antennas and reducing the antenna volume.

At present, two-wire polarized antennas are commonly used in the field of public mobile communications. The antennas of such a two-wire polarized antenna are arranged orthogonally at ±45 degrees for forming mutually orthogonal linearly polarized electromagnetic waves in space. The antenna elements of each column of bilinearly polarized antennas are linearly arranged. Currently, line antennas are commonly used in mobile terminal devices. Due to the complicated and diverse postures of the user using the mobile terminal device, such as answering a call, surfing the Internet, etc., the orientation of the antenna of the mobile terminal is varied, and also due to the complex and variable nature of the wireless channel environment. Therefore, the correlation between the main set and the diversity signal is increased; the power of the different polarized signals received by the receiver of the mobile terminal is unbalanced, affecting the diversity gain, and reducing the reception quality. Summary of the invention

The embodiment of the invention provides an antenna for transmitting circularly polarized electromagnetic waves by using a ±45 orthogonal two-line polarized antenna to improve the consistency of electromagnetic wave receiving power.

In a first aspect, an embodiment of the present invention provides an antenna, where the antenna includes:

a two-line polarized vibrator orthogonally disposed with a ±45 degree polarization, wherein the two-line polarized vibrator includes a first antenna element and a second antenna element;

a composite signal generating device, wherein the composite signal generating device is electrically coupled to the first antenna element and the second antenna element, respectively, wherein the first antenna element and the second antenna element are generated by the composite signal generating device a composite signal such that the composite signal forms a circular polarization in space Signal.

With reference to the first aspect, in a first possible implementation, the composite signal generating device includes a first composite signal generating device electrically coupled to the first antenna element, and is electrically coupled to the second antenna element a second composite signal generating device,

The first composite signal generating device includes a first power splitter, a first combiner, and a first +90 degree phase shifter.

The second composite signal generating device includes a second power splitter, a second combiner, and a second +90 degree phase shifter.

The first power splitter receives the first way signal and outputs the first branch signal and the second branch signal, and the second power splitter receives the second way signal and outputs the fourth branch signal and the fifth branch Road signal,

The first +90 degree phase shifter receives the first branch signal and shifts the first branch signal by +90 degrees to output a third branch signal, the second +90 degree phase shifter Receiving the fifth tributary signal and shifting the fifth tributary signal by +90 degrees to output a sixth tributary signal,

The first combiner receives the third branch signal and the fourth branch signal, and outputs a first composite signal, and the second combiner receives the second branch signal and the first Six-way signals, and output a second composite signal,

The first composite signal is input to the first antenna element, and the second composite signal is input to the second antenna element for reception.

In conjunction with the first aspect and/or the first possible implementation of the first aspect, in a second possible implementation, the composite signal generating apparatus includes a +90 degree phase shifter; a power splitter; and a combiner The power splitter receives the first path signal and outputs the first branch signal and the second branch signal, and the +90 degree phase shifter receives the first branch signal and outputs the third branch signal, The third branch signal is input to the first antenna element,

The combiner receives the second tributary signal and the second directional signal and outputs a composite signal, the composite signal being input to the second antenna element.

In conjunction with the first aspect and/or the first and second possible implementations of the first aspect, in a third possible implementation, the composite signal generating apparatus passes the feed network and the dual-line polarized oscillator Electrical coupling.

In conjunction with the first aspect and/or the first to third possible implementations of the first aspect, in a fourth possible implementation, the plurality of two-line polarized vibrators are arranged in a plurality of columns or columns. With reference to the first aspect and/or the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner, the composite signal generating apparatus passes the feed network and the respective two-line polarization The vibrator is electrically coupled.

In a second aspect, an antenna system is proposed, the antenna system comprising the antenna of the first aspect of the invention, and a radio frequency module located inside the antenna.

According to the embodiment of the present invention, the circularly polarized signal can be realized without changing the existing antenna element and the feeding network, so that the power balance of the terminal receiving the polarization diversity signal is enhanced, and the existing antenna is facilitated. Renovation, saving antenna equipment renewal costs. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

1 is a schematic structural diagram of an antenna according to an embodiment of the present invention;

2 is a schematic structural diagram of an antenna according to another implementation of an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

The antenna of the embodiment of the present invention includes:

a composite signal generating device, wherein the composite signal generating device is electrically coupled to the first antenna element and the second antenna element, respectively, wherein the first antenna element and the second antenna element are generated by the composite signal generating device The composite signal is such that the composite signal forms a circularly polarized signal in space.

1 is a schematic structural view of an antenna according to an embodiment of the present invention. As shown in FIG. 1, the antenna 100 includes a column of two-line polarized vibrators 110, wherein each of the two-line polarized vibrators 110 includes a polarization of ±45 degrees. The first antenna element 112 and the second antenna element 114 are disposed, for example, the first antenna element 112 is polarized at +45 degrees, and the second antenna element 114 is polarized at -45 degrees. The inputs 102, 104 of the antenna 100 are electrically coupled to the feed network 130 by a composite signal generating device 120. Feed network 130 is electrically coupled to dual linear polarized vibrator 110. In the embodiment of the present invention, the feed network 130 may include a power divider 132, such as a bisection power divider, for equally inputting signals into each of the two-line polarized vibrators 110.

In accordance with an embodiment of the invention, antenna 100 can include a plurality of columns of two-line polarized vibrators 110 that are electrically coupled to composite signal generating device 120 by feed network 130 in a manner similar to that described above.

In the embodiment shown in FIG. 1, composite signal generating device 120 includes first composite signal generating device 122 that is electrically coupled to first antenna element 112. The first composite signal generating device 122 includes a power divider 124, a +90 degree phase shifter 126, and a combiner 128. For example, the power divider 124 herein is a bisection power divider.

Similarly, the composite signal generating device 120 includes a second composite signal generating device 222 that is electrically coupled to the second antenna element 114. The second composite signal generating means 222 includes a power splitter 224, a +90 degree phase shifter 226 and a combiner 228. For example, the power divider 224 herein is a bisection power divider.

The input of the power divider 124 serves as the input 102 of the antenna, the first output of the power divider 124 is electrically coupled to the input of the +90 degree phase shifter 126, and the second output is electrically coupled to the combiner 228. At the first input, the output of the +90 degree phase shifter 126 is electrically coupled to the first input of the combiner 128; the input of the splitter 224 serves as the input 104 of the antenna, and the first output of the splitter 224 The terminal is electrically connected to the second input of the combiner 128, the second output of the splitter 224 is electrically coupled to the input of the +90 phase shifter 226, and the output of the +90 degree phase shifter 226 is electrically coupled The second input of the router 228.

The first signal A is input to the power divider 124, and the power divider 124 outputs two branch signals, for example, the first branch signal A1 and the second branch signal A2. The first branch signal A1 is input to the +90 degree phase shifter 126, and the third branch signal A3 is output from the +90 degree phase shifter 126, and the second branch signal A2 is input to the combiner 228. The second signal B is input to the power divider 224, and the power divider 224 outputs two branch signals, such as the fourth branch signal B1 and the fifth branch signal B2. The fifth branch signal B2 is input to the +90 degree phase shifter 226, and the sixth branch signal B3 is output from the +90 degree phase shifter 226, and the fourth branch signal B1 is input to the combiner 128.

In the embodiment of the present invention as shown in FIG. 1, the third branch signal A3 and the fourth branch signal B1 are input to the combiner 128, and the combiner 128 outputs the first composite signal A3+B1. First composite signal A3+B1 is input to each of the first antenna elements 112 (+45 degree polarized antenna elements) through the respective power dividers 132 of the feed network 130, and is transmitted by the first antenna elements 112. Similarly, the second tributary signal A2 and the sixth tributary signal B3 are input to the combiner 228, and the combiner 228 outputs the second synthesized signal A2+B3. The second composite signal A2+B3 is input to each of the second antenna elements 114 (-45 degree polarized antenna elements) through the respective power dividers 132 of the feed network 130, and is transmitted by the second antenna elements 114.

According to this embodiment, there is a first synthesized signal A3+B1 transmitted by the first antenna element 112 (+45 degree polarized antenna element) and a second transmitted by the second antenna element 114 (-45 degree polarized antenna element) The second synthesis signal A2+B3. Since the first antenna element 112 is orthogonal to the second antenna element 114 by 45 degrees, the third branch signal A3 and the second branch signal A2 have the same amplitude and the difference is +90 degrees, and the third branch signal A3 is The +45 degree polarized antenna oscillator is emitted, and the second branch signal A2 is emitted by the -45 degree polarized antenna element, thus forming a right-hand circularly polarized signal, and the sixth branch signal B3 and the fourth branch signal B1 The values are equal and the difference is +90 degrees. The sixth branch signal B3 is transmitted by the -45 degree polarized antenna element, and the fourth branch signal B1 is emitted by the +45 degree polarized antenna element, thus forming a left-hand circularly polarized signal. This results in a double circularly polarized signal.

In another possible implementation, as shown in FIG. 2, the input end of the power splitter 124 serves as the input end 102 of the antenna, and the first output end of the power splitter 124 is electrically connected to the +90 degree phase shifter 126. The input terminal is electrically coupled to the first input of combiner 228; antenna input 104 is electrically coupled to the second input of combiner 228. The first signal A is input to the power divider 124, and the first branch signal A1 and the second branch signal A2 are output by the power divider 124. The first branch signal A1 is input to the +90 degree phase shifter 126, and the third branch signal A3 is output by the +90 degree phase shifter. The third branch signal A3 is input to each of the first antenna elements 112 via the power dividers 132 of the feed network 130, and is transmitted by the first antenna elements 112. Further, the second branch signal A2 and the second signal B are input to the combiner 228, and the combiner 228 outputs the third combined signal A2+B. The third composite signal A2+B is input to each of the second antenna elements 114 via the respective power dividers 132 of the feed network 130, and is transmitted by the second antenna elements 114. As described above, there are a right-hand circularly polarized signal and a linearly polarized signal formed by the second tributary signal A2 and the third tributary signal A3 in the space. In both cases, the composite signal generating means 120 may include Power splitter 124, +90 degree phase shifter 126 and combiner 228. Similarly, the left branch signal B1 and the third branch B3 can be used to form a left circular polarization signal and a linear polarization signal eight.

The embodiment of the present invention further provides an antenna system, where the antenna system includes an antenna according to an embodiment of the present invention and a radio frequency module located inside the antenna. According to the embodiment of the present invention, the circularly polarized signal can be realized without changing the existing antenna element and the feeding network, so that the power balance of the terminal receiving the polarization diversity signal is enhanced, and the existing antenna is facilitated. Renovation, saving antenna equipment renewal costs.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

An antenna, characterized in that the antenna comprises:

2. The antenna of claim 1 wherein:

The composite signal generating device includes first combined signal generating means electrically coupled to the first antenna element, and second combined signal generating means electrically coupled to the second antenna element, the first combined signal generating means The first power splitter, the first combiner and the first +90 degree phase shifter are included,

3. The antenna according to claim 1, wherein said composite signal generating means comprises a +90 degree phase shifter; a power splitter; and a combiner,

The power divider receives the first path signal and outputs the first branch signal and the second branch signal, and the +90 degree phase shifter receives the first branch signal and outputs the third branch signal. The third branch signal is input to the first antenna element, The combiner receives the second branch signal and the second path signal and outputs a composite signal, and the composite signal is input to the second antenna element.

The antenna according to any one of claims 1 to 3, wherein the composite signal generating means is electrically coupled to the two-line polarized vibrator via a feed network.

The antenna according to any one of claims 1 to 3, wherein the plurality of two-line polarized vibrators are arranged in one or more columns.

The antenna according to any one of claims 1 to 5, wherein the composite signal generating means is electrically coupled to the respective two-line polarized vibrators via a feed network.

An antenna system comprising the antenna according to any one of claims 1 to 6, and a radio frequency module located inside the antenna.