CN2879573Y - Double frequency-band antenna and its matching device - Google Patents
Double frequency-band antenna and its matching device Download PDFInfo
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- CN2879573Y CN2879573Y CNU022489517U CN02248951U CN2879573Y CN 2879573 Y CN2879573 Y CN 2879573Y CN U022489517 U CNU022489517 U CN U022489517U CN 02248951 U CN02248951 U CN 02248951U CN 2879573 Y CN2879573 Y CN 2879573Y
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Abstract
A double frequency-band antenna and its matching device can working at a lower frequency-band of 806 to 960 MHz (covering frequency-bands such as TETRA 800 MHz, CDMA 800 MHz, GSM 900 MHz and so on) as well as at a higher frequency-band of 1710 MHz to 2500MHz (covering frequency-bands such as DCS 1800 MHz, PCS 1900 MHz, IMT-2000 2.4 GHz, WLAN and so on). It includes: a tube shape radiating unit, a micro-strip line resistance matching device, a metallic reflection plate. The tube shape radiating unit is comprised by a lower part, a higher part, a support part, wherein the diameter of the lower part is larger, and that of the higher part is smaller, that of the support part is the smallest, and the length size and the diameter size of the lower part and the higher part and the support part respectively accord with the golden section ratio relation. And the micro-strip line resistance matching device is comprised by at least four micro-strip transmission lines of different characteristics, and three micro-strip lines, whose terminals are short connected, of different characteristics.
Description
[technical field]
The utility model relates to a kind of double frequency band aerial, refers to be used for the double frequency-band ceiling type domestic aerial of mobile communication indoor covering system especially.
[background technology]
In the information age of today, interpersonal distance has been shortened in the development of communication.The development of mobile communication is at a tremendous pace especially, and explosive growth appears in traffic carrying capacity and number of users year after year.With regard to the present present situation of China Mobile, two maximum operator---China Mobile and CHINAUNICOM is according to the requirement of business development, constantly in dilatation and the scope that increases covering.Its measure is: increase on the one hand the capacity of existing base station and at the number of outdoor increase base station and repeater, on the other hand, strengthen the dynamics of " mending blind " in the service area.There are many " blind areas " in the service area, such as: hotel, office building, market place builet below the ground, parking lot, tunnel, subway, station, harbour, airport or the like can be found everywhere.Because the continuous expansion of power system capacity is adopted microcellulor and Pico cell technology in the compact district, down town, makes the quantity of indoor " blind area " roll up.Operator adopts the form of indoor covering communication system, less investment, instant effect usually for improving the service quality of indoor " blind area ".
" domestic aerial " is the critical component of mobile communication indoor covering system, has broad application prospects.Ceiling mount antenna is exactly wherein a kind of, and its adopts conventional perpendicular polarization one pole oscillator radiating element to realize usually.
In the prior art, the height of conventional one pole oscillator radiating element is about about the quarter-wave of lowest operating frequency, and this is under the situation of similar CDMA800MHz, GSM900, and it is bigger that its antenna volume and thickness will seem.Because other parts of whole indoor covering communication system are hidden for the user, having domestic aerial only is to be illustrated in user's the visual field, considers that many indoor environments space is limited, dwindles antenna size and could adapt to various instructions for uses better.
In addition, different operators adopts different communication bands, and same operator is for increasing power system capacity and improving service quality and adopt a plurality of communication bands.And existing antenna product often can only be operated in single wave band, perhaps can take into account 1～2 wave band but is cost with the sacrificial section performance index.Like this, when a plurality of wave bands of needs are worked simultaneously, need to adopt a plurality of antennas in the planning, therefore system design will become complicated and use inconvenience, and cost rises simultaneously.
[summary of the invention]
In order to improve the shortcoming of prior art, a purpose of the present utility model provides a kind of double frequency band aerial that is used for the mobile communication indoor covering system, can be used for the communication purposes of frequency ranges such as TETRA800MHz, CDMA800MHz, GSM900MHz, DCS1800MHz, DECT1800MHz, PCS1900MHz, IMT-2000,2.4GHz WLAN simultaneously.
Another purpose of the present utility model provides a kind of double frequency-band all-around top absorbing antenna that is used for the mobile communication indoor covering system, index function admirable and compact size such as its standing-wave ratio and directional diagram, good looking appearance is cheap and easy to install.
In order to achieve the above object, the utility model is achieved in that provides a kind of double frequency band aerial and coalignment thereof that is used for mobile communication, can work in the 806-960MHz (covering frequency ranges such as TETRA800MHz, CDMA800MHz, GSM900MHz) of lower band and two frequency ranges of 1710-2500MHz (covering DCS1800MHz, PCS1900MHz, frequency ranges such as IMT-2000,2.4GHz WLAN) of high frequency band simultaneously, it is characterized in that forming by following each several part:
A radiating element;
One two port microstrip line impedence coalignment;
The circular metal reflecting plate of a ground connection;
Described microstrip line impedance-matching device is printed on the upper surface of a microwave substrate, and described microwave substrate is placed in parallel in described metallic reflection plate top, and the lower surface of described microwave substrate is connected with the upper surface coplane of described metallic reflection plate;
Described radiating element is supported in described metallic reflection plate top, and described radiating element distributing point is connected with an end of described microstrip line impedance-matching device;
The other end of described microstrip line impedance-matching device brings to coaxial conversion and is connected on the coaxial cable by little, and links to each other with the PERCOM peripheral communication parts by the coaxial cable of band coaxial fitting.
Described radiating element is made up of than lower part, higher part and support section 3 coaxial lines that are hollow tubular structures; Upper end than lower part links to each other at same horizontal plane position sudden change diameter with the lower end of higher part; Upper end than lower part links to each other at same horizontal plane position sudden change diameter with the upper end of support section again simultaneously; The lower end of support section places the top of described metallic reflection plate and is connected with the upper surface coplane of metallic reflection plate.
The total height of described radiating element is greater than 1/8th wavelength of lowest operating frequency, and the while is less than 1/2nd wavelength of maximum operating frequency; The height of support section is about 0.618 times of described radiating element total height by golden section proportion; The height of higher part is about 0.618 times of height of described radiating element support section by golden section proportion; (1+0.618) doubly half that is about the height of support section than the height of lower part; The height that leaves described metallic reflection plate than the lower end of lower part is about (1-0.618) doubly half of the height of support section.
Described radiating element than the external diameter of lower part greater than 1/4th of described radiating element total height, simultaneously less than 1/2nd of described radiating element total height; The external diameter of the higher part of described radiating element by golden section proportion be about described radiating element than 0.618 times of the external diameter of lower part; The external diameter of the support section of described radiating element is about 0.618 times of external diameter of the higher part of described radiating element by golden section proportion.
The radius of described ground connection circular metal reflecting plate be about described radiating element total height (1+0.618) doubly about; The thickness of described ground connection circular metal reflecting plate can be ignored with respect to operation wavelength.
Described microstrip line impedance-matching device is counted up to little from the distributing point of described radiating element and is with coaxial transfer point, at least comprise the cascade of the microstrip transmission line of 4 sections length-specifics and width, and terminal short circuit microstrip line at the tie point place of first section microstrip transmission line and second a section microstrip transmission line length-specific in parallel at least and width, at the terminal short circuit microstrip line of the tie point place of second section microstrip transmission line and the 3rd a section microstrip transmission line length-specific in parallel at least and width, at the terminal short circuit microstrip line of the tie point place of the 3rd section microstrip transmission line and the 4th a section microstrip transmission line length-specific in parallel at least and width; The printing surface layout of described each section microstrip transmission line and each section termination short circuit microstrip line can be done appropriate change or bending with reference to economical with materials with without prejudice to the principle of microwave principle.
Each microstrip transmission line in the described microstrip line impedance-matching device, the length of short circuit microstrip line in parallel and width can be adjusted and optimize, to realize best wideband impedance match effect.
Described radiating element down extends the sheet metal that a width is not more than 1cm in the lower edge than lower part; The lower limb of described sheet metal extends to the upper surface of described microwave substrate, and with a port solder interconnections of described microstrip line impedance-matching device; Another port of described microstrip line impedance-matching device is with coaxial adapter solder interconnections with little.
The utility model provides a kind of double frequency-band ceiling type antenna that is used for the mobile communication indoor covering system, the communication purposes that can be used for a plurality of different operation frequency bands such as TETRA, CDMA, GSM, DCS, PCS, DECT, UMTS, IMT-2000, WLAN simultaneously, and have index function admirables such as standing-wave ratio and directional diagram, compact size, good looking appearance, characteristics cheap and easy to install.
Below in conjunction with drawings and the specific embodiments the utility model is further described in more detail:
[description of drawings]
Fig. 1 is a side-looking structural representation of the present utility model.
Fig. 2 is a plan structure schematic diagram of the present utility model.
Fig. 3 is the standing-wave ratio performance plot of the utility model actual measurement.
Should note the identical reference number composed component identical that use in the accompanying drawings with symbolic representation.
[embodiment]
See also Fig. 1, shown in Figure 2, a preferred embodiment of the present utility model adopts following steps to be achieved: antenna radiation unit is made up of 01,02,03,04 structure; Two port microstrip line impedence coalignments 06 are made up of L1, L2, L3, L4, S1, S2, S3; This two port microstrips line impedence coalignment 06 is printed on the upper surface of microwave substrate 05; Microwave substrate 05 places on the circular metal reflecting plate 07 of ground connection.
The upper end than lower part 01 of radiating element links to each other at H3 place, same horizontal plane position sudden change diameter with the lower end of higher part 02; Upper end than lower part 01 links to each other at H3 place, same horizontal plane position sudden change diameter with the upper end of support section 03 again simultaneously; The lower end of support section 03 places the top of metallic reflection plate 07 and is connected with the upper surface coplane of metallic reflection plate 07.
The overall height H 0 of radiating element is designed to about the sixth wavelength of lowest operating frequency, also is slightly less than 1/2nd wavelength of maximum operating frequency simultaneously; The height H 3 of support section 03 is designed to 0.618 times of radiating element overall height H 0 by golden section proportion; The height H 2 of higher part 02 is designed to 0.618 times of height H 3 of support section 03 by golden section proportion; Be designed to (1+0.618) doubly half of support section 03 height H 3 than the height H 1 of lower part 01; The height H 4 of leaving metallic reflection plate 07 than the lower end of lower part 01 is designed to (1-0.618) doubly half of support section 03 height H 3.
(1-0.618) that the outer diameter D 1 than lower part 01 of radiating element is designed to approximate greatly radiating element overall height H 0 doubly; The outer diameter D 2 of the higher part 02 of radiating element is designed to radiating element 0.618 times than the outer diameter D 1 of lower part 01 by golden section proportion; The outer diameter D 3 of the support section 03 of radiating element is designed to 0.618 times of outer diameter D 2 of the higher part 02 of radiating element by golden section proportion.
The radial design of ground connection circular metal reflecting plate 07 for (1+0.618) of the overall height H 0 that approximates radiating element greatly doubly; The Thickness Design of ground connection circular metal reflecting plate 07 is 1.5mm.
Microstrip line impedance-matching device 06 is counted up to little from the distributing point 06A of radiating element and is with coaxial transfer point 06E, the microstrip transmission line L1 that includes 4 sections different lengths and width, L2, L3, the cascade of L4, and microstrip line S1 at the tie point 06B place of first section microstrip transmission line L1 and second a section microstrip transmission line L2 terminal short circuit in parallel, at the microstrip line S2 of the tie point 06C place of second section microstrip transmission line L2 and the 3rd a section microstrip transmission line L3 terminal short circuit in parallel, at the microstrip line S3 of the tie point 06D place of the 3rd section microstrip transmission line L3 and the 4th a section microstrip transmission line L4 terminal short circuit in parallel; The printing surface layout of each section microstrip transmission line and each section termination short circuit microstrip line adopts 90 degree bendings to handle in plurality of positions, so that practice every conceivable frugality the microwave substrate material according to the style of Fig. 2.
Each microstrip transmission line in the microstrip line impedance-matching device 06, the length of short circuit microstrip line in parallel and width are adjusted by microwave CAD software and are optimized, finally to realize that best wideband impedance match effect is a purpose.
Radiating element down extends the sheet metal 04 of the about 0.5cm of a width at the lower edge 04A than lower part 01; The upper level that the lower limb 06A of this sheet metal 04 extends to microwave substrate 05 is the position of H5, and with the port 06A solder interconnections of microstrip line impedance-matching device 06; Another port 06E of microstrip line impedance-matching device 06 is with coaxial adapter 08 solder interconnections with little.
So, according to above-mentioned design principle,, finally can realize best wideband impedance match effect by length and the width of each microstrip line L1, L2 in the adjustment microstrip line impedance-matching device, L3, L4, S1, S2, S3.Fig. 3 illustrates the curve of the standing-wave ratio of present embodiment actual measurement with frequency change, as can be seen, the working band of this antenna has covered first frequency band of 806～960MHz and second frequency band of 1710～2500MHz, wherein, first frequency band has comprised a plurality of wave bands such as mobile communication TETRA, CDMA, GSM, and corresponding maximum standing-wave ratio is less than 1.8; Second frequency band has comprised a plurality of wave bands such as mobile communication DCS, PCS, DECT, UMTS, IMT-2000,2.4GHz WLAN, and corresponding maximum standing-wave ratio is less than 1.4.
The indoor ceiling mount antenna sample that constitutes by this embodiment, in a plurality of wave bands, form the pattern characteristics of omnidirectional radiation, its actual measurement gain is about 2dBi at first frequency band of 806～960MHz, is about 4dBi at second frequency band of 1710～2500MHz, and is fine at the coverage property in full spatial domain.This embodiment can satisfy the requirement of mobile communication system well.
Find out to have simple and compact for structure and high performance advantage easily, and be easy to make, cheaply and conveniently install and use according to this antenna of the utility model manufacturing.
As mentioned above, although represented and described the utility model with reference to specific preferred embodiment, but it shall not be construed as the restriction to the utility model self, those skilled in the art should be understood that, under the prerequisite of the spirit and scope of the present utility model that do not break away from the claims definition, can make various variations in the form and details to it.Appending claims has covered all such changes and modifications in the utility model spirit and scope.
Claims (8)
1, a kind of double frequency band aerial and coalignment thereof can work in the 806-960MHz of lower band and two frequency ranges of 1710-2500MHz of high frequency band simultaneously, it is characterized in that being made up of following each several part:
A radiating element;
One two port microstrip line impedence coalignment;
The circular metal reflecting plate of a ground connection;
Described microstrip line impedance-matching device is printed on the upper surface of a microwave substrate, and described microwave substrate is placed in parallel in described metallic reflection plate top, and the lower surface of described microwave substrate is connected with the upper surface coplane of described metallic reflection plate;
Described radiating element is supported in described metallic reflection plate top, and described radiating element distributing point is connected with an end of described microstrip line impedance-matching device;
The other end of the anti-coalignment of described microstrip line group brings to coaxial conversion and is connected on the coaxial cable by little, and links to each other with the PERCOM peripheral communication part by the coaxial cable of band coaxial fitting.
2, antenna according to claim 1 is characterized in that: described radiating element is the lower part of the coaxial line of hollow tubular structures, higher part and support section by 3 and forms; Upper end than lower part links to each other at same horizontal plane position sudden change diameter with the lower end of higher part; Upper end than lower part links to each other at same horizontal plane position sudden change diameter with the upper end of support section again simultaneously; The lower end of support section places the top of described metallic reflection plate and is connected with the upper surface coplane of metallic reflection plate.
3, antenna according to claim 1 is characterized in that: the total height of described radiating element is greater than 1/8th wavelength of lowest operating frequency, and the while is less than 1/2nd wavelength of maximum operating frequency; The height of support section is about 0.618 times of described radiating element total height by golden section proportion; The height of higher part is about 0.618 times of height of described radiating element support section by golden section proportion; (1+0.618) doubly half that is about the support section height than the height of lower part; The height that leaves described metallic reflection plate than the lower end of lower part is about (1-0.618) doubly half of support section height.
4, antenna according to claim 1, it is characterized in that: described radiating element than the external diameter of lower part greater than 1/4th of described radiating element total height, simultaneously less than 1/2nd of described radiating element total height, the external diameter of the higher part of described radiating element by golden section proportion be about described radiating element than 0.618 times of the external diameter of lower part; The external diameter of the support section of described radiating element is about 0.618 times of external diameter of the higher part of described radiating element by golden section proportion.
5, antenna according to claim 1 is characterized in that: the radius of described ground connection circular metal reflecting plate be about described radiating element total height (1+0.618) doubly about; The thickness of described ground connection circular metal reflecting plate can be ignored with respect to operation wavelength.
6, antenna according to claim 1, it is characterized in that: described microstrip line impedance-matching device is counted up to little from the distributing point of described radiating element and is with coaxial transfer point, at least comprise the cascade of the microstrip transmission line of 4 sections length-specifics and width, and terminal short circuit microstrip line at the tie point place of first section microstrip transmission line and second a section microstrip transmission line length-specific in parallel at least and width, terminal short circuit microstrip line at the tie point place of second section microstrip transmission line and the 3rd a section microstrip transmission line length-specific in parallel at least and width, at the terminal short circuit microstrip line of the tie point place of the 3rd section microstrip transmission line and the 4th a section microstrip transmission line length-specific in parallel at least and width, the printing surface layout of described each section microstrip transmission line and each section termination short circuit microstrip line can be done appropriate change or bending with reference to economical with materials with without prejudice to the principle of microwave principle.
7, antenna according to claim 1 is characterized in that: each microstrip transmission line in the described microstrip line impedance-matching device, the length of each short circuit microstrip line in parallel and width can be adjusted and optimize, to realize best wideband impedance match effect.
8, antenna according to claim 1 is characterized in that: described radiating element down extends the sheet metal that a width is not more than 1cm in the lower edge than lower part; The lower limb of described sheet metal extends to the upper surface of described microwave substrate, and with a port solder interconnections of described microstrip line impedance-matching device; Another port of described microstrip line impedance-matching device is with coaxial adapter solder interconnections with little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022489517U CN2879573Y (en) | 2002-10-28 | 2002-10-28 | Double frequency-band antenna and its matching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022489517U CN2879573Y (en) | 2002-10-28 | 2002-10-28 | Double frequency-band antenna and its matching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2879573Y true CN2879573Y (en) | 2007-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU022489517U Expired - Lifetime CN2879573Y (en) | 2002-10-28 | 2002-10-28 | Double frequency-band antenna and its matching device |
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| Country | Link |
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| CN (1) | CN2879573Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167160A (en) * | 2018-08-22 | 2019-01-08 | 广州中海达卫星导航技术股份有限公司 | Antenna assembly and GNSS measure antenna |
-
2002
- 2002-10-28 CN CNU022489517U patent/CN2879573Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167160A (en) * | 2018-08-22 | 2019-01-08 | 广州中海达卫星导航技术股份有限公司 | Antenna assembly and GNSS measure antenna |
| CN109167160B (en) * | 2018-08-22 | 2020-10-02 | 广州中海达卫星导航技术股份有限公司 | Antenna device and GNSS measuring antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121028 Granted publication date: 20070314 |