CN205911438U - A feed circuit for antenna test - Google Patents
A feed circuit for antenna test Download PDFInfo
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- CN205911438U CN205911438U CN201620679442.8U CN201620679442U CN205911438U CN 205911438 U CN205911438 U CN 205911438U CN 201620679442 U CN201620679442 U CN 201620679442U CN 205911438 U CN205911438 U CN 205911438U
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- impedor
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Abstract
The utility model discloses a feed circuit for antenna test, including antenna feed point, the 2nd antenna feed point, feeder line connected point, first matching unit and second matching unit, first matching unit connection is between antenna feed point and feeder line connected point, and the second matees the unit connection between the 2nd antenna feed point and feeder line connected point, wherein, the impedance of first matching unit set up as with the impedance match of the antenna of an antenna feed point connection, impedance that the second matees the unit set up as with the impedance match of the antenna of the 2nd antenna feed point connection. Thus, the utility model discloses a feed circuit for antenna test has realized the in -process at antenna test, the feed to at least two antennas time the through a feeder to can carry out impedance match to every antenna adjusts.
Description
Technical field
This utility model is related to field of antenna, more specifically, this utility model is related to a kind of feed for antenna measurement
Circuit.
Background technology
Commonly only have a main antenna on the acoustic mode set product now commonly used, but only retain the feelings that an antenna exists
Condition, is often difficult to take into account low frequency and the high frequency of antenna.Antenna works teacher in designing antenna, in order to be able to make the low of antenna
Frequency and high frequency are taken into account simultaneously, can take and will determine the cabling of antenna low frequency and high frequency branch separately: i.e. the walking of high and low frequency range branch
Line is considered two isolated antennas.
On whole machine, the antenna of this design form is exactly the same with single main antenna performance, but in producing line batch production
But larger difference is had during test.In general, this two isolated antenna feed points are very nearly (7-9mm) apart, commonly
Feeding classification be to be connected to the distributing point of this two isolated antennas with two feeder lines, because of this two distributing points distance relatively
Closely, in the waveform taking double-fed line feed to debug antenna on test fixture, two cable lines have larger each other
Interference, also takes up two ports of testing producing lines vector network analyzer (i.e. vna) simultaneously.
It is therefore proposed that one kind is in antenna measurement, the feed at least two antennas being fed simultaneously using single feed line is electric
Road is very valuable.
Utility model content
A purpose of the present utility model be provide a kind of for can be using a feeder line at least two during antenna measurement
The feed circuit that individual antenna feeds simultaneously.
According to one side of the present utility model, provide a kind of feed circuit for antenna measurement, including first antenna
Distributing point, the second antenna feed point, feeder line junction point, the first matching unit and the second matching unit, described first matching unit
It is connected between described first antenna distributing point and described feeder line junction point, described second matching unit is connected to described second day
Between line distributing point and described feeder line junction point；Wherein, the impedance of described first matching unit is arranged to and described first day
The impedance matching of the antenna that line distributing point connects；The impedance of described second matching unit is arranged to and described second antenna feed
The impedance matching of the antenna that point connects.
Optionally, described first matching unit includes the first impedor being connected in series and the second impedor, institute
State junction point between the first impedor and described second impedor as the first junction point, described first impedor is even
It is connected between described first antenna distributing point and described first junction point, described second impedor is connected to described first connection
Between point and described feeder line junction point；Described second matching unit includes the 3rd impedor being connected in series and the 4th impedance element
Part, the junction point between described 3rd impedor and described 4th impedor as the second junction point, described 3rd impedance
Element is connected between described second antenna feed point and described second junction point, and described 4th impedor is connected to described
Between two junction points and described feeder line junction point.
Optionally, described second impedor and described 4th impedor are identity element.
Optionally, described first matching unit includes the 5th impedor, and described 5th impedor is connected to described
Between first junction point and earth point；Described second matching unit includes described 5th impedor, described 5th impedor
It is connected between described first junction point and earth point, described first matching unit and described second matching unit share described
Five impedors.
Optionally, described first matching unit also includes the 6th impedor, and described 6th impedor is connected to institute
State between first antenna distributing point and earth point；And/or described second matching unit also includes the 7th impedor, the described 7th
Impedor is connected between described second antenna feed point and earth point.
Optionally, described first matching unit includes the 8th impedor, and described 8th impedor is connected to described
Between feeder line junction point and earth point；Described second matching unit includes described 8th impedor, described 8th impedor
It is connected between described feeder line junction point and earth point, described first matching unit and described second matching unit share described
Eight impedors, wherein, described 8th impedor is electric capacity or inductance.
Optionally, described impedor is any one in resistance, electric capacity and inductance.
One of the present utility model has technical effect that, the feed circuit that this utility model is used for antenna measurement includes first
Antenna feed point, the second antenna feed point, feeder line junction point, the first matching unit and the second matching unit, the first matching unit
It is connected between first antenna distributing point and feeder line junction point, the second matching unit is connected to the second antenna feed point and feeder line connects
Between contact, so, it is achieved that fed to two antennas by a feeder line simultaneously during antenna measurement, and can
Impedance matching regulation is carried out to each antenna.
By the detailed description to exemplary embodiment of the present utility model referring to the drawings, other of the present utility model
Feature and its advantage will be made apparent from.
Brief description
Constitute the Description of Drawings of a part the embodiment of the present utility model of description, and use together with the description
In explanation principle of the present utility model.
Fig. 1 is a kind of schematic diagram of the embodiment of feed circuit being used for antenna measurement according to this utility model；
Fig. 2 is the schematic diagram of the another embodiment of feed circuit being used for antenna measurement according to this utility model；
Fig. 3 is the schematic diagram of the third embodiment of feed circuit being used for antenna measurement according to this utility model.
Description of reference numerals:
A, b- antenna feed point；T- feeder line junction point；
101st, 102- matching unit；P1, p2- junction point；
Z1, z2, z3, z4, z5, z6, z7, z8- impedor.
Specific embodiment
To describe various exemplary embodiment of the present utility model now with reference to accompanying drawing in detail.It should also be noted that it is unless another
Illustrate outward, the positioned opposite, numerical expression of the part otherwise illustrating in these embodiments and step and numerical value do not limit
Make scope of the present utility model.
Description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
Any restriction that is new and its applying or use.
May be not discussed in detail for technology and equipment known to person of ordinary skill in the relevant, but in suitable situation
Under, described technology and equipment should be considered a part for description.
In all examples with discussion shown here, any occurrence should be construed as merely exemplary, and not
It is as restriction.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter expression similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then do not need it is further discussed in subsequent accompanying drawing.
In order to solve existing antenna measurement, when antenna and feeder line quantity correspond, between antenna feed point, distance is very
Closely, when leading to debug antenna waveform on test fixture, the problem that can disturb between feeder line is it is proposed that one kind can be adopted
The feed circuit at least two antennas being fed simultaneously with a feeder line, as shown in figure 1, this utility model is used for antenna measurement
Feed circuit includes first antenna distributing point a, the second antenna feed point b, feeder line junction point t, the first matching unit 101 and second
Matching unit 102, the first matching unit 101 is connected between first antenna distributing point a and feeder line junction point t, and the second coupling is single
Unit 102 is connected between the second antenna feed point b and feeder line junction point t, and wherein, the impedance of the first matching unit 101 is set
It is the impedance matching of the antenna being connected with first antenna distributing point a；The impedance of the second matching unit 102 is arranged to and second day
The impedance matching of the antenna that line distributing point b connects.
Above-mentioned antenna feed point a, b are used for connecting antenna, and feeder line junction point is used for connecting feeder line, and wherein, feeder line refers to even
Connect the electrical signal energy transmission line between antenna and transceiver.Conventional feeder line has overhead line, coaxial cable, waveguide etc..
Antenna is connected to signal projector by feed circuit and feeder line.
So, during antenna measurement, by a feeder line, at least two antennas are fed it becomes possible to effectively keep away simultaneously
The problem exempting to interfere between close feeder line, meanwhile, also solves occupancy when debugging waveform on test fixture many
The problem of individual vna port.
Meanwhile, also need consideration is the impedance matching between matching unit and antenna.Singal source resistance and connect transmission line
Characteristic impedance equal in magnitude and phase place is identical, or the equal in magnitude and phase place of the characteristic impedance of transmission line and connect load impedance
Identical, it is referred to as the input of transmission line or output in impedance matching condition, referred to as impedance matching.
In the event of an impedance mismatch, transmission line will exist incidence wave and echo simultaneously.For the angle of transmission,
Always fight off the appearance of impedance mismatching phenomenon, because the appearance of echo is it is meant that be delivered to the power of transmission-wire terminal
All loads can not be absorbed, reduced efficiency of transmission.
Therefore, the impedance phase of the antenna that the impedance of the first matching unit 101 is connected with first antenna distributing point a be set
With the impedance of the second matching unit 102 is identical with the impedance of the antenna that the second antenna feed point b connects, and so, could effectively keep away
Exempt from the appearance of echo so that antenna transmission power maximizes.
Specifically, the first matching unit 101 can include the first impedor z1 being connected in series and the second impedor
Z2, as shown in Fig. 2 the junction point between the first impedor z1 and the second impedor z2 is as the first junction point p1, first
Impedor z1 is connected between first antenna distributing point a and the first junction point p1, and the second impedor z2 is connected to first even
Between contact p1 and feeder line junction point t；Second matching unit 102 includes the 3rd impedor z3 being connected in series and the 4th impedance
Element z4, the junction point between the 3rd impedor z3 and the 4th impedor z4 as the second junction point p2, the 3rd impedance element
Part z3 is connected between the second antenna feed point b and the second junction point p2, and the 4th impedor z4 is connected to the second junction point p2
And feeder line junction point t between.
Wherein, the first impedor z1, the second impedor z2, the 3rd impedor z3 and the 4th impedor z4
To be any one element in resistance, electric capacity and inductance.
For example, the impedance of the antenna connecting as first antenna distributing point a is ra+jxaWhen, the first matching unit can be set
101 is r for resistanceaResistance and induction reactance be xaInductance series connection, that is, the first impedor z1 and the second impedor z2 is respectively
Resistance is raResistance and induction reactance be xaInductance；When the impedance of the antenna of the second antenna feed point b connection is rb-jxbWhen, can
To arrange the second matching unit 102 for resistance as rbResistance and capacitive reactance be xbCapacitances in series, i.e. the 3rd impedor z3 and
It is r that four impedor z4 are respectively resistancebResistance and capacitive reactance be xbElectric capacity.
So it is achieved that the impedance of antenna that is connected with first antenna distributing point a of the impedance of the first matching unit 101
Join, the impedance matching of the antenna that the impedance of the second matching unit 102 is connected with the second antenna feed point b.
If when the impedance of the antenna of first antenna distributing point a connection is r+jxa, the sky that the second antenna feed point b connects
The impedance of line is r-jxb, then can arrange the first impedor z1 for induction reactance is xaInductance, the second impedor z2 be resistance
Resistance for r, the 3rd impedor z3 is x for capacitive reactancebElectric capacity, the 4th impedor z4 for resistance be r resistance, due to resistance
The impedance of anti-element z2 with z4 is identical, then the first impedor z2 and the 4th impedor z4 can be r for same resistance
Resistance, the first matching unit 101 and the second matching unit 102 share this impedor, so, the first junction point p1 and second
Junction point p2 is also same point, as shown in Figure 3.
The antenna connecting in order to the antenna and the second antenna feed point b that improve first antenna distributing point a connection simultaneously
Waveform shape, in a specific embodiment of the present utility model, the first matching unit 101 includes the 5th impedor z5,
As shown in figure 3, the 5th impedor z5 is connected between junction point p1, p2 and earth point；Second matching unit 102 includes the 5th
Impedor z5, the 5th impedor z5 is connected between junction point p1, p2 and earth point, the first matching unit 101 and second
Matching unit 102 shares the 5th impedor z5.
Further, antenna and the second antenna feed point b in order to improve first antenna distributing point a connection respectively connect
The waveform shape of the antenna connecing, in a specific embodiment of the present utility model, improves first antenna distributing point a if necessary
The waveform shape of the antenna connecting, the first matching unit 101 can include the 6th impedor z6, as shown in figure 3, the 6th impedance
Element z6 is connected between first antenna distributing point a and earth point.If necessary to improve the antenna that the second antenna feed point b connects
Waveform shape, the second matching unit 102 can include the 7th impedor z7, and the 7th impedor z7 is connected to the second antenna
Between distributing point b and earth point.
Wherein, above-mentioned 5th impedor z5, the 6th impedor z6 and the 7th impedor z7 may each be electric capacity and
Any one element in inductance.
On this basis, antenna waveform is unstable, when being easily subject to external interference, needs to improve the sensitivity of this antenna waveform.
The antenna waveform connecting if necessary to the antenna and the second antenna feed point b that improve first antenna distributing point a connection simultaneously quick
Perception, can arrange the 5th impedor z5 is a big resistance；Improve first antenna distributing point a connection if necessary to improve respectively
Antenna and the second antenna feed point b connect antenna waveform sensitivity, in another specific embodiment of the present utility model
In, improve the sensitivity of the antenna waveform of first antenna distributing point a connection if necessary, the 6th impedor z6 is big resistance.
If necessary to improve the sensitivity of the antenna waveform that the second antenna feed point b connects, the 7th impedor z7 is big resistance.
Specifically, the first matching unit 101 can also include the 8th impedor z8, as shown in figure 3, the 8th impedor
Z8 is connected between feeder line junction point t and earth point；Second matching unit 102 can also include the 8th impedor z8, and the 8th
Impedor z8 is connected between feeder line junction point t and earth point, and the first matching unit 101 and the second matching unit 102 share
8th impedor z8, wherein, the 8th impedor z8 is electric capacity or inductance.If the 8th impedor z8 is electricity
Hold, then, then can have the effect such as decoupling, filtering simultaneously；If the 8th impedor z8 is inductance, then, can have
Filtering etc. is had to act on.8th impedor z8 is electric capacity or inductance can have the effect removing noise in signal.
The description of the various embodiments described above primary focus and the difference of other embodiment, but those skilled in the art should be clear
Chu, the various embodiments described above can be used alone as needed or be combined with each other.
Although being described in detail to some specific embodiments of the present utility model by example, this area
It is to be understood by the skilled artisans that above example is merely to illustrate, rather than in order to limit scope of the present utility model.This
Field it is to be understood by the skilled artisans that can be in the case of without departing from scope and spirit of the present utility model, to above example
Modify.Scope of the present utility model is defined by the following claims.
Claims (7)
1. a kind of feed circuit for antenna measurement is it is characterised in that include first antenna distributing point (a), the second antenna feed
Electric point (b), feeder line junction point (t), the first matching unit (101) and the second matching unit (102), described first matching unit
(101) it is connected between described first antenna distributing point (a) and described feeder line junction point (t), described second matching unit (102)
It is connected between described second antenna feed point (b) and described feeder line junction point (t)；Wherein, described first matching unit (101)
Impedance be arranged to the impedance matching of antenna that is connected with described first antenna distributing point (a)；Described second matching unit
(102) impedance is arranged to the impedance matching of antenna being connected with described second antenna feed point (b).
2. feed circuit according to claim 1 is it is characterised in that described first matching unit (101) includes series connection even
The first impedor (z1) connecing and the second impedor (z2), described first impedor (z1) and described second impedor
(z2) as the first junction point (p1), described first impedor (z1) is connected to described first antenna feed to the junction point between
Between point (a) and described first junction point (p1), described second impedor (z2) be connected to described first junction point (p1) and
Between described feeder line junction point (t)；Described second matching unit (102) includes the 3rd impedor (z3) being connected in series and the
Four impedors (z4), the junction point between described 3rd impedor (z3) and described 4th impedor (z4) is as second
Junction point (p2), described 3rd impedor (z3) is connected to described second antenna feed point (b) and described second junction point
(p2), between, described 4th impedor (z4) is connected between described second junction point (p2) and described feeder line junction point (t).
3. feed circuit according to claim 2 is it is characterised in that described second impedor (z2) and the described 4th hinders
Anti- element (z4) is identity element.
4. feed circuit according to claim 3 is it is characterised in that described first matching unit (101) includes the 5th resistance
Anti- element (z5), described 5th impedor (z5) is connected to described first junction point (p1) and earth point between；Described second
Matching unit (102) includes described 5th impedor (z5), and described 5th impedor (z5) is connected to described first connection
And earth point between, described first matching unit (101) and described second matching unit (102) share described 5th resistance to point (p1)
Anti- element (z5).
5. feed circuit according to claim 1 is it is characterised in that described first matching unit (101) also includes the 6th
Impedor (z6), described 6th impedor (z6) is connected between described first antenna distributing point (a) and earth point；With/
Or, described second matching unit (102) also includes the 7th impedor (z7), described 7th impedor (z7) is connected to described
Between second antenna feed point (b) and earth point.
6. feed circuit according to claim 1 is it is characterised in that described first matching unit (101) includes the 8th resistance
Anti- element (z8), described 8th impedor (z8) is connected between described feeder line junction point (t) and earth point；Described second
Join unit (102) and include described 8th impedor (z8), described 8th impedor (z8) is connected to described feeder line junction point
T, between () and earth point, described first matching unit (101) and described second matching unit (102) share described 8th impedance
Element (z8), wherein, described 8th impedor (z8) is electric capacity or inductance.
7. the feed circuit according to any one of claim 2-5 is it is characterised in that described impedor is resistance, electricity
Hold and inductance in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620679442.8U CN205911438U (en) | 2016-06-30 | 2016-06-30 | A feed circuit for antenna test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620679442.8U CN205911438U (en) | 2016-06-30 | 2016-06-30 | A feed circuit for antenna test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205911438U true CN205911438U (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620679442.8U Active CN205911438U (en) | 2016-06-30 | 2016-06-30 | A feed circuit for antenna test |
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| CN (1) | CN205911438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453023A (en) * | 2017-06-22 | 2017-12-08 | 瑞声科技(新加坡)有限公司 | Antenna system and mobile terminal |
-
2016
- 2016-06-30 CN CN201620679442.8U patent/CN205911438U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453023A (en) * | 2017-06-22 | 2017-12-08 | 瑞声科技(新加坡)有限公司 | Antenna system and mobile terminal |
| CN107453023B (en) * | 2017-06-22 | 2020-02-18 | 瑞声科技(新加坡)有限公司 | Antenna system and mobile terminal |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: 262123 west side of Xiangjiang Road and south side of Taishan street, Xin'an street, Anqiu City, Weifang City, Shandong Province (No. 37, Xiangjiang Road) Patentee after: Yili Precision Manufacturing Co.,Ltd. Address before: 262123 room 216, Fuhe B building, Tiandi Commercial Plaza, Anqiu Economic Development Zone, Weifang City, Shandong Province Patentee before: WEIFANG GOERTEK PRECISION MANUFACTURING Co.,Ltd. |