WO2006133609A1 - High separation flat directional smart antenna array - Google Patents

High separation flat directional smart antenna array Download PDF

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Publication number
WO2006133609A1
WO2006133609A1 PCT/CN2005/002284 CN2005002284W WO2006133609A1 WO 2006133609 A1 WO2006133609 A1 WO 2006133609A1 CN 2005002284 W CN2005002284 W CN 2005002284W WO 2006133609 A1 WO2006133609 A1 WO 2006133609A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiation
array
plate
smart antenna
antenna array
Prior art date
Application number
PCT/CN2005/002284
Other languages
French (fr)
Chinese (zh)
Inventor
Binlong Bu
Fengzhang Xue
Shuai Xu
Enpeng Liu
Xiaoshi Huang
Original Assignee
Comba Telecom Technology (Guangzhou) Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN200510035167.2 priority Critical
Priority to CN 200510035167 priority patent/CN100341198C/en
Application filed by Comba Telecom Technology (Guangzhou) Ltd. filed Critical Comba Telecom Technology (Guangzhou) Ltd.
Publication of WO2006133609A1 publication Critical patent/WO2006133609A1/en

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2216Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14Reflecting surfaces; Equivalent structures
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/06Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061Two dimensional planar arrays
    • H01Q21/062Two dimensional planar arrays using dipole aerials

Abstract

A high separation flat directional smart antenna array is disclosed. The antenna array includes a metallic reflecting plate, a radome, and radiation arrays. Each radiation array consists of several dipoles arranged in a single row. The radiation array is arranged on the metallic reflecting plate, and the metallic reflecting plate is covered with the radome. On the metallic reflecting plate, at least two radiation arrays, which are aligned parallel, are arranged. The radiation arrays are feed in parallel, and at least one metallic separating bar is arranged between the adjacent radiation arrays. The bars are in parallel with the radiation arrays. Thus, compared to the existing art, the invention can not only improve the separation of the directional smart antenna array greatly, but also make the presetting of the down-tilt and the forming of the beam more easily by feeding in parallel.

Description

A plate-shaped high isolation directional smart antenna

TECHNICAL FIELD

The present invention relates to a smart antenna array, in particular a plate-shaped high isolation directional smart antenna. 【technical background】

Concept of smart antenna in the late 1980s proposed for the needs of mobile communication technology, can improve the mobile communication system channel multiplexing rate, the base station coverage area, and to overcome co-channel, multi-path fading and the like growing interference .

At present, smart antenna for a base station. From the receiver perspective, the base station using a smart antenna multipath radio waves from the mobile station direction is the direction of arrival (DOA) estimation, and spatial filtering, inhibit other mobile stations and multipath interference. From the transmission point of view, the use of smart antenna base station transmit signals on downlink beamforming so that a base station transmits a signal can be transmitted back to the mobile station the mobile station along a direction of arrival of the radio wave, thereby reducing the transmit power, reducing interference to other mobile stations.

Conventional plate-like single directional smart antenna array is fed in series, and no other matching measures, and thus, the isolation between adjacent cells is only about 15dB.

Due to the low isolation, the base station using a smart antenna multipath wave direction from the mobile station will perform DOA estimation deviation, resulting in:

1, the beam of the tracking error, the base station can not efficiently transmit signals to the mobile station.

2, zero cancellation allowed, interference suppression ability.

3, when the beam scanning, due to the strong mutual coupling between adjacent columns, impedance mismatch situation will be very serious, there may be scanned blind spots, which will lead to the use of smart antenna effect is reduced.

Therefore, it is necessary to find ways to improve plate-directional smart antenna isolation.

SUMMARY OF THE INVENTION books object of the invention is confirmed to be the premise of holding the plate-like smart antenna other characteristics unchanged, to provide a substantial increase in isolation, to overcome these shortcomings of the plate-like high isolation directional smart antenna.

Object of the present invention is achieved by the following technical solutions: The plate-shaped high isolation directional smart antenna comprises a metal reflector, the radiation from the array and radome composed of a plurality of radiating elements comprises a single row, the radiating metal reflective array is provided board, the antenna provided in the hood above the metal reflection plate, wherein the metallic reflecting plate disposed over the at least two parallel arrays of radiation, radiation in parallel between the feed array and the radiation between the two arrays adjacent They are side by side with the addition of at least one elongated metal spacer bars.

Compared with the prior art, advantages of the present invention is that: on the one hand make the plate-shaped directional isolation of a substantial increase in smart antenna; the other hand, thanks to the parallel feed, and therefore can be easily achieved and the pre-tilt angle beamforming.

The present invention will be further described below in conjunction with the accompanying drawings and examples:

BRIEF DESCRIPTION

1 a perspective view of the present invention, wherein part of the radome is removed;

FIG radiation array 2 of the present invention, a schematic view of the transducer and a feed network of radiation;

Figure 3 is a single horizontal array typical radiation pattern invention;

Typical isolation curve between adjacent radiators of the array of FIG. 4 of the present invention;

FIG 5 at a preset angle 6 and the side lobe suppression when the vertical direction in FIG typically 18dB to the present invention;

6 is a perspective view of a second embodiment of the present invention, wherein part of the antenna cover is removed;

Radiating array of the second embodiment, radiating elements and the feed network of FIG. 7 is a schematic view of the invention, wherein Figure 7a is a partial enlarged view of the bottom left portion of Figure 7b;

A single radiating array typically horizontal direction in FIG. 8 of the present invention;

Typical isolation curve between the adjacent array of radiation of a second embodiment of the present invention FIG. 【detailed description】

Please refer to FIG. 1, the present invention is a plate-shaped high isolation directional smart antenna array, comprising a metal reflector, the antenna cover 4, array 2 of eight and nine radiating metal spacer 3 of the array 2 is disposed radiation reflecting metal plate 1, 4 radome cover disposed above the light reflecting metal plate 1, nine elongated metal spacer bars 3 are placed in two adjacent array of radiation on an axis of symmetry between the two, arranged side by side on one of the metal reflection plate radiation array 2 not less than two, so, each of the radiation arrays can be employed in parallel between two power feeding.

Please refer to FIG. 2, the eight radiation radiated by 2 array transducer cable 11 and a power divider 12 separate networks. Changing the length of feeder 11 as long as each of radiating elements, can be achieved at a preset angle; if simultaneously adjusts each power splitters 13 dividing ratio and line length, can be achieved under a preset angle and the side lobe suppression.

Increase the spacing between the radiating array, it can easily reduce the mutual coupling, thereby improving the isolation, but will cause the total width of the antenna array is increased, increasing the volume and weight of the antenna array and array spacing is too large , there will be grating lobes in the antenna beam scanning synthesis, therefore, the present invention, each of the radiating elements of the array of radiation from the reference surface of the metal reflection plate distance constraint between 1/3 to 1/5 wavelength, particularly taking 1/4 the wavelength of the radiation in a central position on the array pitch of the constraint is 1/2 wavelength.

Array by radiation between two adjacent isolation strips 2 3 additional metal, electric wall is formed symmetrically, the left and right sides of radiating oscillator 11 of the excitation power lines are blocked by the metal spacer strip 3, can not reach the other radiating elements 11, Save small mutual coupling, thereby improving the isolation. The use of a uniform feeding can be done in parallel with the feeding, each of the radiating elements 11 of the same mutual coupling, isolation can be improved.

The metal strip 3 fission isolating two or more segments, or may be a plurality of side by side, while the cross section can be any shape, including circular, triangular, square or rectangular and the like.

By comparing FIG. 3, a single radiating FIGS. 4 and 5 array disclosed typical horizontal direction in FIG. 2, a typical array of adjacent radiation isolation between the two curves, and the pre-tilt angle at 6 to 18dB side lobe suppression when typically the vertical direction in the drawing, can analyze the effect brought about by the present invention. Please refer to FIG. 6 and FIG. 7, another embodiment of the present invention which embodiment, the difference from the previous embodiment only in that the radiation array 2, the eight printed dipole 11, and a microstrip line power divider network 12, the composition. 8 and 9 discloses a single horizontal array typical radiation pattern of the embodiment according to the present embodiment, a typical isolation curve between the adjacent array of radiation, herein by reference.

In summary, the present invention is a series of technical improvements, has significant effects:

1, by adding a metal spacer bars and parallel feeding using two measures, the relative orientation of the present invention has a plate-like smart antenna increases the isolation 7 ~ 8dB, wherein the array pitch of the constraint is 1/2 wavelength, isolation can reach 23 dB.

2, the feed employed in parallel, so that the present invention can be easily implemented at a preset angle and beamforming.

3, the present invention has simple and compact structure, easy to manufacture and easy to install and use characteristics.

Although the preferred embodiments with reference to the specific embodiments have been shown and described the present invention, but should not be construed as limiting the invention itself, those skilled in the art should understand that the spirit and scope of the invention without departing from the as defined in the appended claims under the premise, can make various changes in form and detail. The appended claims cover all such changes and modifications within the spirit and scope of the invention.

Claims

Claims
A plate-shaped high isolation directional smart antenna array, comprising a metal reflector, comprising a radome and a single radiating array of radiating elements composed of the radiation plate array disposed on a metal reflector, the antenna provided in the metal hood above the reflection plate, wherein: the metal reflection plate is provided at least two or more parallel arrays of radiation, radiation in parallel between the feed array and adjacent each additional radiation between two parallel arrays with at least one the elongated metal spacer bars.
2, the high isolation of a plate according to claim 1 directional smart antenna array, wherein: each of said radiation transducer array radiation distance from a reference plane metal reflector is 1/3 to 1/5 wavelength. between the array pitch of the radiation at the center frequency of 1/2 wavelength.
3, the high isolation of a plate according to claim 2 directional smart antenna, wherein: the metal spacer strip is provided on two adjacent array of radiation axis of symmetry.
4, high isolation according to claim 3, wherein said plate-shaped directional smart antenna array, wherein: the metal spacer strip into two or more fission.
5. The high isolation according to any one of claims 1 to 4, a plate-shaped directional smart antenna array, wherein: the metal spacer strip circular cross-section.
6, according to the high degree of isolation according to any one of claims 1 to 4, a plate-shaped directional smart antenna array, wherein: the metal spacer strip rectangular cross section.
7. A high isolation according to any one of claims 1 to 4, a plate-shaped directional smart antenna array, wherein: the metal spacer strip square cross section.
8, according to the high degree of isolation according to any one of claims 1 to 4, a plate-shaped directional smart antenna array, wherein: the metal spacer strip triangular cross section.
PCT/CN2005/002284 2005-06-13 2005-12-22 High separation flat directional smart antenna array WO2006133609A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200510035167.2 2005-06-13
CN 200510035167 CN100341198C (en) 2005-06-13 2005-06-13 High-isolatting-degree plate-shape directinal intelligent antenna array

Publications (1)

Publication Number Publication Date
WO2006133609A1 true WO2006133609A1 (en) 2006-12-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/002284 WO2006133609A1 (en) 2005-06-13 2005-12-22 High separation flat directional smart antenna array

Country Status (2)

Country Link
CN (1) CN100341198C (en)
WO (1) WO2006133609A1 (en)

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US9112611B2 (en) 2009-02-03 2015-08-18 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
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US9184843B2 (en) 2011-04-29 2015-11-10 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
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US9240835B2 (en) 2011-04-29 2016-01-19 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
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