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Broad band cross polarized antenna arrangement

Info

Publication number
WO2014076635A1
WO2014076635A1 PCT/IB2013/060079 IB2013060079W WO2014076635A1 WO 2014076635 A1 WO2014076635 A1 WO 2014076635A1 IB 2013060079 W IB2013060079 W IB 2013060079W WO 2014076635 A1 WO2014076635 A1 WO 2014076635A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
antenna
band
antennas
region
arrangement
Prior art date
Application number
PCT/IB2013/060079
Other languages
French (fr)
Inventor
Andries Petrus Cronje Fourie
Mark Pierre HAARHOFF
Derek Colin NITCH
Original Assignee
Poynting Antennas (Pty) Limited
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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q1/00Details of, or arrangements associated with, aerials
    • H01Q1/12Supports; Mounting means
    • H01Q1/1207Supports; Mounting means for fastening a rigid aerial element
    • H01Q1/1221Supports; Mounting means for fastening a rigid aerial element onto a wall
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q1/00Details of, or arrangements associated with, aerials
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q21/00Aerial arrays or systems
    • H01Q21/24Combinations of aerial elements or aerial units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q5/00Arrangements for simultaneous operation of aerials on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/307Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364Creating multiple current paths
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q5/00Arrangements for simultaneous operation of aerials on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QAERIALS
    • H01Q9/00Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant aerials
    • H01Q9/16Resonant aerials with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole

Abstract

An antenna arrangement suitable for use as part of customer premises equipment in a radio frequency network comprises at least first and second elongate antennas (12, 14) each comprising an etched conductive pattern (16)having a length I, width w and thickness d on a substrate (18). Each antenna covers a frequency band comprising frequencies in a first band region and at least one of a second band region and a third band region. The first band region comprising frequencies in the range 700MHz to l000MHz, the second band region comprising frequencies in the range 1700MHz to 2200MHz and the third band region comprising frequencies in the range 2500MHz to 2700MHz. The first and second antennas are mounted in cross configuration relative to one another and the length I of the conductive pattern (16) is smaller than 0.5λ of the lowest frequency in the frequency band, w < 1/5 and d < w/5.

Description

BROAD BAND CROSS POLARIZED ANTENNA ARRANGEMENT

INTRODUCTION AND BACKGROUND

This invention relates to an antenna assembly more particularly a broad band dual polarized assembly.

With the long term evolution ("LTE") of networks such as 2G, 3G and 4G more sophisticated antenna arrangements are required to provide multiple input multiple output ("Mi o") and diversity support for the networks at customer or user premise equipment. The known antenna arrangements do not cover the broad bandwidth required whilst also providing two ports each carrying a different polarization.

OBJECT OF THE INVENTION

Accordingly, it is an object of the present invention to provide an alternative antenna arrangement with which the applicant believes the aforementioned disadvantages may at least be alleviated or which may provide a useful alternative for the known arrangements.

SUMMARY OF THE INVENTION

According to the invention there is provided an antenna arrangement comprising: - at least first and second elongate antennas each comprising an etched conductive pattern having a length I, width w and thickness d on a substrate;

- each antenna covering a frequency band comprising frequencies in a first band region and at least one of a second band region and a third band region, the first band region comprising frequencies in the range 700MHz to 1000MHz, the second band region comprising frequencies in the range 1 700MHz to 2200MHz and the third band region comprising frequencies in the range 2500MHz to 2700MHz;

- the first and second antennas being mounted in cross configuration relative to one another; and

- the length I of the conductive pattern being smaller than 0.5λ of the lowest frequency in the frequency band, w_ < I/5 and d_< w/5.

Preferably the frequency band comprises frequencies in all of the first second and third band regions. More preferably each antenna covers frequencies in the band 700MHz to 2700MHz.

The conductive pattern of at least the first antennas may be provided on first and second faces of the substrate. The substrate may typically be plate-like and the conductive pattern may comprise a first part on a first face of the substrate and a second part on an opposite face. The conductive pattern may be formed on the substrate according to any suitable technique including a printed circuit board manufacturing technique.

The first and second antennas may be identical to one another in shape and configuration.

The first and second antennas are preferably mounted at right angles relative to one another.

The substrates of the first and second antennas may be mounted in spaced and parallel planes.

The antennas may be mounted in a hermitically sealed housing. The housing may comprise means for mounting the housing on a pole or against a vertical surface such as a wall or window.

The antennas may be suspended in the housing by respective one ends of the substrates. The antennas may be center fed towards said respective one ends.

There may be provided a cross connector of an insulating material comprising a first formation for removably receiving the substrate of the first antenna and a second formation for removably receiving the substrate of the second antenna to secure the first and second antennas at right angles relative to one another and suitably spaced from one another.

Also included within the scope of the invention is an antenna as herein defined and/or described.

Still further included within the scope of the invention is customer premise equipment for a radio frequency network which equipment comprises an antenna arrangement as herein defined and/or described.

BRIEF DESCRIPTION OF THE ACCOMPANYING DIAGRAMS

The invention will now further be described, by way of example only, with reference to the accompanying diagrams wherein:

figure 1 is a diagrammatic perspective view of an antenna arrangement;

figure 2 is a diagrammatic representation of a frequency band covered by antennas of the arrangement;

figure 3 is a plan view onto one face of a substrate of one antenna of the assembly showing a first part of a conductive pattern of the antenna thereon; figure 4 is a plan view onto an opposite face of the substrate of the one antenna of the assembly showing a second part of the conductive pattern of the antenna thereon;

figure 5 is a side view of the substrate and conductive pattern.

figure 6 diagrammatic perspective view of the antenna arrangement mounted in a housing therefor and parts of which are shown in broken lines for improved clarity.

DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION

An antenna arrangement is generally designated by the reference numeral 10 in the diagrams.

The antenna arrangement 10 comprises at least a first elongate antenna 12 and a second elongate antenna 14. Each of the first and second antennas comprise an etched conductive pattern 16 comprising a first part 16.1 and a second part 16.2 having a form factor which is made up by a length I, width w and thickness d provided on a substrate 18. which is typically and preferably flat and plate-like. Each antenna covers a frequency band 20 (shown in figure 2) comprising frequencies in a first band region 20.1 and at least one of a second band region 20.2 and a third band region 20.3. As shown in figure 2, the first band region comprises frequencies in the range 700MHz to 1000MHz, the second band region comprises frequencies in the range 1700MHz to 2200MHz and the third band region comprises frequencies in the range 2500MHz to 2700MHz. Preferably, both antennas cover a frequency band comprising frequencies in all three band regions, so that each antenna is a broadband antenna having a frequency ratio of larger than 3:1 . As shown in figure 1 , the first antenna 12 and the second antenna are mounted in cross configuration relative to one another.

The antennas 12 and 14 are identical in shape and configuration and therefore only antenna 12 will be described in further detail with reference to figures 3 to 5. The first part 16.1 of the conductive pattern has a length

11 and is provide on one face of the substrate 18. The second part 16.2 of the conductive pattern has a length \g and is provide on the opposite face of the substrate. The combined length I of the conductive pattern 16 is +

12 and is smaller than 0.5A of the lowest frequency, i.e. 700Mhz in the frequency band 20, w < |/5 and d_< w/5.

As shown in figure 6, the antennas 12 and 14 are mounted towards their respective one ends 32, 34 with the respective substrates in parallel spaced relation in a housing 30. The antennas are centre fed at 36 towards their respective one ends 32 and 34. At 36 there is also provided a via between the first part 16.1 and the second part 16.2 of the conductive pattern 16. The antennas are mounted at right angles relative to one another. To this end, a X-configured connector 38 of an isolating material is provided. The connector 38 comprises a first channel-type formation 40 for removably receiving in clip-in and clip-out fashion the substrate 18 of the first antenna and a second channel-type formation 42 for removably receiving in clip-in and clip-out fashion the substrate 18 of the second antenna.

When so held by the connector 38, the conductive patterns are located in respective planes and the planes are parallel to one another. The spacing between the parallel planes is such that interaction and/or interference between the first and second antennas is reduced and so that independent operation is facilitated.

The housing 30 is configured to be hermitically sealed and to provide access to first and second cables 50 and 52 each carrying a respective polarization. The housing 30 comprises any suitable means for mounting the housing on a pole or against a wail and any suitable means including a sucker type means 54 for mounting the housing against a window.

As shown in figure 6, the antennas may be suspended in the housing from a removable lid 62 for the housing. The antennas are preferably suspended from integral formations 60 on the lid 62. With the orthogonally mounted antennas, the arrangement is capable of handling signals having a 90 degree polarization differential and these signals are conducted by the cables 50 and 52 respectively.

The antenna arrangement may fins particular application as part of end user or customer premises equipment in a radio frequency network, including a cellular network.

It will be appreciated that the arrangement could be be used as a receiving arrangement or as a transmitting arrangement or both.

Claims

An antenna arrangement comprising:
- at least first and second elongate antennas each comprising an etched conductive pattern having a length I, width w and thickness d on a substrate;
- each antenna covering a frequency band comprising frequencies in a first band region and at least one of a second band region and a third band region, the first band region comprising frequencies in the range 700MHz to 1000MHz, the second band region comprising frequencies in the range 1700MHz to 2200MHz and the third band region comprising frequencies in the range 2500MHz to 2700MHz;
- the first and second antennas being mounted in cross configuration relative to one another; and
- the length ] of the conductive pattern being smaller than 0.5A of the lowest frequency in the frequency band, w < I/5 and d_< w/5.
An antenna arrangement as claimed in claim 1 wherein the frequency band comprises frequencies in all of the first, second and third band regions.
3. An antenna arrangement as claimed in claim 2 wherein each antenna covers frequencies in the band 700MHz to 2700MHz.
4. An antenna arrangement as claimed in any one of the preceding claims wherein the conductive pattern of at least the first antenna Is provided on first and second faces of the substrate.
5. An antenna arrangement as claimed in claim 4 wherein the substrate is plate-like and the conductive pattern comprises a first part on a first face of the substrate and the second part on an opposite face.
6. An antenna arrangement as claimed in any one of claims 1 to 5 wherein the first and second antennas are identical in shape and configuration.
7. An antenna arrangement as claimed in any one of the preceding claims wherein the first and second antennas are mounted at right angles relative to one another.
8. An antenna arrangement as claimed in any one of claims 6 and 7 wherein the substrates of the first and second antennas are mounted in spaced and parallel planes.
9. An antenna arrangement as claimed in any one of the preceding claims comprising a hermitically sealed housing wherein the first and second antennas are mounted.
10. An antenna arrangement as claimed in claim 9 wherein the housing comprises releasable mounting means for mounting the housing on a support. 1 . An antenna arrangement as claimed in claim 9 or claim 10 wherein the antennas are suspended in the housing by respective one ends of the substrates.
12. An antenna arrangement as claimed in 1 1 wherein the antennas are center fed towards said respective one ends.
13. An antenna arrangement as claimed in any one of claims 7 to 12 comprising a cross connector of an insulating material comprising a first formation for removably receiving the substrate of the first antenna and a second formation for removably receiving the substrate of the second antenna to secure the first and second antennas at right angles relative to one another and spaced from one another.
14. An elongate antenna comprising: an etched conductive pattern having a length I, width w and thickness d provided on a substrate;
the antenna covering a frequency band comprising frequencies in a first band region and at least one of a second band region and a third band region, the first band region comprising frequencies in the range 700MHz to 1000MHz, the second band region comprising frequencies in the range 700MHz to 2200MHz and the third band region comprising frequencies in the range 2500MHz to 2700MHz; and
the length I of the conductive pattern being smaller than 0.5Λ of the lowest frequency in the frequency band, w_ < I/ 5 and d_< w/5.
15. Customer premise equipment for a radio frequency network comprising an antenna arrangement as claimed in any one of claims 1 to 13.
PCT/IB2013/060079 2012-11-15 2013-11-12 Broad band cross polarized antenna arrangement WO2014076635A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ZA2012/08607 2012-11-15
ZA201208607 2012-11-15

Publications (1)

Publication Number Publication Date
WO2014076635A1 true true WO2014076635A1 (en) 2014-05-22

Family

ID=49679570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2013/060079 WO2014076635A1 (en) 2012-11-15 2013-11-12 Broad band cross polarized antenna arrangement

Country Status (1)

Country Link
WO (1) WO2014076635A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06177635A (en) * 1992-12-07 1994-06-24 Mitsubishi Electric Corp Cross dipole antenna system
US6018324A (en) * 1996-12-20 2000-01-25 Northern Telecom Limited Omni-directional dipole antenna with a self balancing feed arrangement
US6100848A (en) * 1995-06-02 2000-08-08 Ericsson Inc. Multiple band printed monopole antenna
EP2009735A1 (en) * 2007-06-22 2008-12-31 Philippe Herman Antenna with diversity of polarisation for transmitting and/or receiving audio and/or video signals
US20100171675A1 (en) * 2007-06-06 2010-07-08 Carmen Borja Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06177635A (en) * 1992-12-07 1994-06-24 Mitsubishi Electric Corp Cross dipole antenna system
US6100848A (en) * 1995-06-02 2000-08-08 Ericsson Inc. Multiple band printed monopole antenna
US6018324A (en) * 1996-12-20 2000-01-25 Northern Telecom Limited Omni-directional dipole antenna with a self balancing feed arrangement
US20100171675A1 (en) * 2007-06-06 2010-07-08 Carmen Borja Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array
EP2009735A1 (en) * 2007-06-22 2008-12-31 Philippe Herman Antenna with diversity of polarisation for transmitting and/or receiving audio and/or video signals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

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