CN105242125B - Radio-frequency measurement device and microstrip line fine tuning inductance with microstrip line fine tuning inductance - Google Patents
Radio-frequency measurement device and microstrip line fine tuning inductance with microstrip line fine tuning inductance Download PDFInfo
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- CN105242125B CN105242125B CN201410321234.6A CN201410321234A CN105242125B CN 105242125 B CN105242125 B CN 105242125B CN 201410321234 A CN201410321234 A CN 201410321234A CN 105242125 B CN105242125 B CN 105242125B
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Abstract
A kind of radio-frequency measurement device and microstrip line fine tuning inductance with microstrip line fine tuning inductance of the present invention, radio-frequency measurement device includes printed wiring board, capacitive part, in at least side of capacitive part series connection microstrip line fine tuning inductance, microstrip line fine tuning inductance includes two the first microstrip lines and the second microstrip line being distributed at an angle of setting on a printed-wiring board, the first pad is equipped in the tail portion of the first microstrip line, the second pad is equipped in the tail portion of the second microstrip line, first pad and the second pad are for connecting capacitance resistance ware, using the first pad as the center of circle, using the length of capacitance resistance ware as third pad is also at least arranged on the circumference of radius, it is connected between second pad and third pad by third microstrip line, first pad and third pad are for connecting capacitance resistance ware.By welding capacitance resistance ware between different pads, the inductance of microstrip line fine tuning inductance is changed, microstrip line fine tuning inductance and capacitive part is made to realize impedance matching.
Description
Technical field
The present invention relates to electric variable measurement device and inductance device fields, in particular to a kind of to have microstrip line fine tuning inductance
Radio-frequency measurement device and microstrip line fine tuning inductance.
Background technique
In the radio-frequency measurement device of the prior art, in order to guarantee the indices requirement of radio-frequency measurement device, in circuit
The problem of impedance matching is often referred in design.Such as common radio-frequency signal source, spectrum analyzer etc., it is with spectrum analyzer
Example, spectrum analyzer be it is a kind of for measured signal carry out spectrum analysis receiver, can measure unknown signaling frequency,
The relevant parameters such as amplitude, distortion usually have very wide frequency band and amplitude measurement range.It is mainly used in base station maintenance, electronics
The fields such as research and development of products, production.Spectrum analyzer can be described as frequency domain oscillograph, tracking oscillograph, analysis oscillograph, harmonic wave point again
Parser, frequency characteristic analyzer or Fourier analyzer etc..Modern spectrum analyzer can in an analog fashion or digital form is shown
Analysis as a result, can analyze 1 hertz of very low frequency below to submillimeter region whole radio frequency bands electric signal.Spectrum analysis
The key technical indexes of instrument has frequency range, sensitivity, amplitude precision, distortion, resolving power, sweep velocity, display mode, false sound
Should be with standing wave etc., spectrum analyzer is generally divided into two class of sweep-frequency Békésy audiometer and real-time analysis mode.
This index of standing wave is to measure spectrum analyzer input impedance characteristic, and port input impedance is typically all to be matched to
50 ohm.This index can be measured by vector network analyzer, if port input impedance is not 50 ohm, when frequency
When spectrum analysis instrument connects equipment under test, and when equipment under test is also not 50 ohms impedance match, error will occur in measurement result.
But when spectrum analyzer reaches 50 ohms impedance match, final testing result is exactly accurate.Therefore spectrum analyzer
Middle impedance is matched good, and standing wave performance indicator is all right.Similarly this index of standing wave can also be used to measure radio-frequency signal source output
Vector network analyzer is connected to the output end of radio-frequency signal source by the impedance operator at end, if the output end of radio-frequency signal source
Mouthful impedance matching it is good, indicate that the standing wave performance indicator of radio-frequency signal source is relatively good.
It is generally provided with ESD protective device in radio-frequency measurement device, switchs, attenuator, amplifier etc..Each of them device
Capacitive or perception is all more or less presented in part, cannot reach impedance matching, this allows for standing wave variation.For example, ESD protective device
Capacitive can generally be presented, entire channel standing wave can be made to be deteriorated.At this moment it needs with inductance come " neutralization " ESD protective device bring appearance
Property, so that entire channel is reached impedance matching.
But because the capacitor that ESD protective device is presented is smaller, therefore the inductance for neutralizing the capacitor is also required to the sufficiently small of design,
It cannot be realized with discrete device.
Summary of the invention
It is an object of the present invention to: it solves the prior art and is not available discrete device realization in radio-frequency measurement device
The technical issues of controllable impedance, provides a kind of radio-frequency measurement device with microstrip line fine tuning inductance.
The radio-frequency measurement device of microstrip line fine tuning inductance provided by the invention, including a printed wiring board, a capacitive
Component, in one microstrip line fine tuning inductance of at least side of capacitive part series connection, the microstrip line fine tuning inductance includes setting
The first microstrip line and the second microstrip line that on a printed-wiring board two are distributed at an angle are set, in first microstrip line
Tail portion be equipped with first pad, the tail portion of second microstrip line be equipped with second pad, first pad and
Second pad is used to connect a capacitance resistance ware, is as the center of circle, with the length of the capacitance resistance ware using first pad
One third pad is also at least set on the circumference of radius, is connected between second pad and third pad by third microstrip line
It connects, first pad and the third pad are for connecting a capacitance resistance ware.
By welding capacitance resistance ware between different pads, the length of microstrip line is had adjusted, and then change microstrip line
Inductance, by adjust microstrip line inductance, make the capacitive part capacitance and the inductance neutralize so that whole
A circuit unit impedance matching.
As an example, using first pad as the center of circle, using the length of the capacitance resistance ware as on the circumference of radius
The 4th pad, the 5th pad, the 6th pad, the 7th pad, the third weldering can also be set gradually
By passing through the 5th micro-strip between the connection of the 4th microstrip line, the 4th pad and the 5th pad between disk and the 4th pad
Line connection passes through the connection of the 6th microstrip line, the 6th pad and described the between the 5th pad and the 6th pad
It is connected between seven pads by the 7th microstrip line, the center of circle is to the angle between the line between each adjacent pad
45 degree, connection one is used between first pad and the 4th pad, the 5th pad, the 6th pad and the 7th pad
Capacitance resistance ware.
By more pads such as the 4th pad of setting, the 5th pad, the 6th pad and the 7th pads, more electricity are realized
The adjusting of sensibility reciprocal value.
As an example, when using first pad as the center of circle, using the length of the capacitance resistance ware as the circumference of radius
When the multiple pads of upper setting, the tail portion of first microstrip line can be thin compared with head.
The tail portion of first microstrip line is thin compared with head, adjusts pad convenient for setting is more, realizes microstrip line inductance more
Fine adjusting.
As an example, it can also connect a microstrip line coarse adjustment inductance in the side of the microstrip line fine tuning inductance,
The microstrip line coarse adjustment inductance, including two the first microstrip lines being serially distributed and the second micro-strip on a printed-wiring board is arranged
Line, is equipped with first pad in the tail portion of first microstrip line, is equipped with one second on the head of second microstrip line
Pad also sets up one on the printed circuit board, in at least side of first microstrip line and second microstrip line
The adjustment section being made of microstrip line, the position that first pad is at least corresponded in the adjustment section are arranged a third and weld
The 4th pad is arranged in disk, the position at least corresponding to second pad, uses between any pair of pad disposed in parallel
In one capacitance resistance ware of welding.
Microstrip line fine tuning inductance is combined with microstrip line coarse adjustment inductance, can neutralize the appearance of capacitive part more accurately
Value, makes entire circuit reach impedance matching
As an example, the capacitive part can be ESD protective device.
Another object of the present invention is to: solve the skill of microstrip line controllable impedance adjusting inductance inconvenience in the prior art
Art problem provides a kind of microstrip line fine tuning inductance.
Microstrip line fine tuning inductance provided by the invention, including setting, two on a printed-wiring board are distributed at an angle
The first microstrip line and the second microstrip line, the tail portion of first microstrip line be equipped with first pad, it is micro- described second
Tail portion with line is equipped with second pad, and first pad and second pad are used to connect a capacitance resistance ware, with
First pad is the center of circle, using the length of the capacitance resistance ware as a third pad is also at least arranged on the circumference of radius,
It is connected between second pad and third pad by third microstrip line, first pad and the third pad are for connecting
Connect a capacitance resistance ware.
By welding capacitance resistance ware between different pads, the length of microstrip line is had adjusted, and then change microstrip line
Inductance.
As an example, using first pad as the center of circle, using the length of the capacitance resistance ware as on the circumference of radius
The 4th pad, the 5th pad, the 6th pad, the 7th pad, the third weldering can also be set gradually
By passing through the 5th micro-strip between the connection of the 4th microstrip line, the 4th pad and the 5th pad between disk and the 4th pad
Line connection passes through the connection of the 6th microstrip line, the 6th pad and described the between the 5th pad and the 6th pad
It is connected between seven pads by the 7th microstrip line, the center of circle is to the angle between the line between each adjacent pad
45 degree, connection one is used between first pad and the 4th pad, the 5th pad, the 6th pad and the 7th pad
Capacitance resistance ware.
By more pads such as the 4th pad of setting, the 5th pad, the 6th pad and the 7th pads, more electricity are realized
The adjusting of sensibility reciprocal value.
As an example, when using first pad as the center of circle, using the length of first capacitance resistance ware as radius
When multiple pads provided circumferentially about, the tail portion of first microstrip line can be thin compared with head.
The tail portion of first microstrip line is thin compared with head, adjusts pad convenient for setting is more, realizes microstrip line inductance more
Fine adjusting.
As an example, the capacitance resistance ware can be 0 ohm chip resistor.
Using 0 ohm chip resistor, it is cheap, installation it is simple and convenient, convenient for batch production.
As an example, the capacitance resistance ware can be patch capacitor.
Capacitance resistance ware uses patch capacitor, can play blocking, suitable for should impedance matching blocking again circuit
In.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the microstrip line coarse adjustment inductance 100 of the preferred embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the microstrip line coarse adjustment inductance 200 of the preferred embodiment of the present invention 2；
Fig. 3 is the capacitive device impedance matching schematic diagram of the radio-frequency measurement device 300 of the preferred embodiment of the present invention 3；
Fig. 4 is the capacitive device impedance matching isoboles of the radio-frequency measurement device 300 of the preferred embodiment of the present invention 3；
Fig. 5 is that the capacitive device impedance matching of the radio-frequency measurement device 300 of the preferred embodiment of the present invention 3 simplifies isoboles；
Fig. 6 is the structural schematic diagram of the microstrip line fine tuning inductance 600 of the preferred embodiment of the present invention 4.
Specific embodiment
Referring to Fig.1, the microstrip line controllable impedance 100 of this preferred embodiment 1, including what is be serially distributed on a printed-wiring board
Microstrip line 101, microstrip line 102, microstrip line 101 and 102 two sides of microstrip line microstrip line 103 disposed in parallel, microstrip line 104,
Pad 105, pad 107 and pad 111 are set on microstrip line 101, pad 106,108 and of pad are set on microstrip line 102
Pad 109 and pad 110 is arranged in pad 112 on microstrip line 103, and pad 113 and pad 114 are arranged on microstrip line 104,
A capacitance resistance ware can be accommodated between every a pair pad disposed in parallel.The microstrip line controllable impedance 100 of this preferred embodiment 1
There are three types of adjustable electric sensibility reciprocals altogether: when mounting capacitance resistance ware 11 between pad 105 and pad 106, signal passes through microstrip line
101, capacitance resistance ware 11 and microstrip line 102, at this moment inductance is minimum；Second attachment capacitance resistance ware 14 and capacitance resistance ware 15,
Signal will pass through microstrip line 101, capacitance resistance ware 14, microstrip line 104, capacitance resistance ware 15 and microstrip line 102, such inductance in this way
Than only passing through the big of capacitance resistance ware 11；The third attachment capacitance resistance ware 12 and capacitance resistance ware 13, compared with second, microstrip line
103 total lengths connected with microstrip line 101, microstrip line 102, capacitance resistance ware 12 and capacitance resistance ware 13 be greater than microstrip line 104,
The total length that microstrip line 101, microstrip line 102, capacitance resistance ware 14 and capacitance resistance ware 15 connect, therefore its inductance will be bigger.
In the preferred embodiment, microstrip line 101, microstrip line 102, microstrip line 103, microstrip line 104 are wide isometric, micro-strip
Line 101, microstrip line 102, microstrip line 103, microstrip line 104 width designed according to 120 ohmage lines, as other act
Example, due on identical plate, the impedance value of microstrip line to the width of microstrip line be it is relevant, microstrip line 101, microstrip line 102,
It can choose the impedance line of identical ohmic value, microstrip line 103, microstrip line 104 can choose the impedance line of identical ohmic value to set
Meter, therefore microstrip line 101, microstrip line 102, microstrip line 103, microstrip line 104 can not also wide Length discrepancies.
In the preferred embodiment, capacitance resistance ware 11, capacitance resistance ware 12, capacitance resistance ware 13, capacitance resistance ware 14, capacitance resistance ware
15 be 0 ohm chip resistor.Due to using 0 ohm chip resistor, so that installation is simple and convenient, convenient for batch production.
As other citing, in this illustration, capacitance resistance ware 11, capacitance resistance ware 12, capacitance resistance ware 13, resistance-capacitance device
Part 14, capacitance resistance ware 15 are patch capacitor.
Need to consider the low-limit frequency that microstrip line 101 and microstrip line 102 work in circuit when using patch capacitor
fmin.The matching impedance R of this preferred embodiment is 50 Ω, then selects total series connection capacitance C when capacitor that should meet:
C>1/(4πRfmin)
Capacitance resistance ware uses patch capacitor, can play blocking, suitable for should impedance matching blocking again circuit
In.
It alternatively illustrates, in this illustration, can be needed to increase microstrip line 103 and microstrip line according to circuit
104 length, to obtain bigger adjustment of inductance amount.
As other citing, in this illustration, pad is not separately provided on microstrip line 101 and microstrip line 102
105 and pad 106,
Pad 107 and pad 108 are used when welding capacitance resistance ware 11, or use pad 111 when welding capacitance resistance ware 11
With pad 112.
As other citing, in this illustration, microstrip line 103 is only set or microstrip line 104 is only set, it can
Realize the adjusting of two inductances.
Referring to Fig. 2, the microstrip line controllable impedance 200 of this preferred embodiment 2, including what is be serially distributed on a printed-wiring board
Perpendicular to microstrip line 201 and microstrip line 202, equal-sized microstrip line 203 is set side by side, micro- in microstrip line 201, microstrip line 202
Band line 204, microstrip line 205, microstrip line 206, microstrip line 207, microstrip line 208 are equipped with pad 209 in the tail portion of microstrip line 201,
Microstrip line 201, microstrip line 202, microstrip line 203, microstrip line 204, microstrip line 205, microstrip line 206, microstrip line 207, microstrip line
208 is wide isometric, and width can be designed according to 120 ohmage lines, as other citing, due on identical plate,
The impedance value of microstrip line to the width of microstrip line be it is relevant, microstrip line 201, can choose identical ohmic value at microstrip line 202
Impedance line, microstrip line 203, microstrip line 204, microstrip line 205, microstrip line 206, microstrip line 207, microstrip line 208 can choose phase
Designed with the impedance line of ohmic value, thus microstrip line 201, microstrip line 202, microstrip line 203, microstrip line 204, microstrip line 205,
Microstrip line 206, microstrip line 207, microstrip line 20 can not also wide Length discrepancies.It is equipped with pad 210 on the head of microstrip line 202,
It is respectively equipped with pad 211 and pad 213 on the head of microstrip line 203 and tail portion, is set respectively on the head of microstrip line 204 and tail portion
There are pad 212 and pad 214, pad 215 and pad 217 is respectively equipped on the head of microstrip line 205 and tail portion, in microstrip line
Pad 216 and pad 218 is respectively set in 206 head and tail portion, and weldering is respectively set on the head of microstrip line 207, microstrip line 208
Disk 219 and pad 220 also set up a butt welding on the corresponding position arranged side by side of the line body of the line body and microstrip line 204 of microstrip line 203
Disk 221 and pad 222 also set up a butt welding on the relative position arranged side by side of the line body of the line body and microstrip line 206 of microstrip line 205
Disk 223 and pad 224 also set up a butt welding on the relative position arranged side by side of the line body of the line body and microstrip line 208 of microstrip line 207
Disk 225 and pad 226.
In the preferred embodiment, it is additionally provided with pad 227 in the tail portion of microstrip line 201, is also set on the head of microstrip line 202
There is pad 228.
When needing minimum inductance amount, capacitance resistance ware 20 is only mounted；When needing compared with big inductance quantity, capacitance resistance ware is only mounted
21,22,23, a U-shaped structure is formed, distance of such Microstrip Length than having had more two capacitance resistance wares originally, inductance will
Increase；It similarly needs to need more capacitance resistance wares when more big inductance quantity to lengthen this U-shaped structure.Certainly, it is only shown in Fig. 2
Four kinds of regulative modes, can also increase U-shaped section, Lai Zeng great adjusting range as needed.
As other citing, in this illustration, pad is not separately provided on microstrip line 201 and microstrip line 202
227 and pad 228, pad 209 and pad 210 are used when welding capacitance resistance ware 20.
In the preferred embodiment, capacitance resistance ware 20, capacitance resistance ware 21, capacitance resistance ware 22, capacitance resistance ware 23, capacitance resistance ware
24, capacitance resistance ware 25, capacitance resistance ware 26, capacitance resistance ware 27, capacitance resistance ware 28, capacitance resistance ware 29 are 0 ohm chip resistor.By
In using 0 ohm chip resistor, so that installation is simple and convenient, convenient for batch production.
As other citing, in this illustration, capacitance resistance ware capacitance resistance ware 20, capacitance resistance ware 21, capacitance resistance ware
22, capacitance resistance ware 23, capacitance resistance ware 24, capacitance resistance ware 25, capacitance resistance ware 26, capacitance resistance ware 27, capacitance resistance ware 28, capacitance resistance ware
29 be patch capacitor.
Need to consider the low-limit frequency f that microstrip line controllable impedance 100 works in circuit when using patch capacitormin.This
The matching impedance R of preferred embodiment is 50 Ω, then selects total series connection capacitance C when capacitor that should meet:
C>1/(4πRfmin)
Capacitance resistance ware uses patch capacitor, can play blocking, suitable for should impedance matching blocking again circuit
In.
It include a radio frequency letter in conjunction with the radio-frequency measurement device 300 referring to Fig. 4, the preferred embodiment of the present invention 3 referring to Fig. 3
Number input terminal 301, a coupled capacitor 302, in the prior art, RF signal output 301 are general directly and coupled capacitor
302 electrical connections, since coupled capacitor 302 is in connection, pad produces two equivalent capacitys C41 and C43 over the ground, this is preferably
A microstrip line fine tuning inductance 303 and one is provided in embodiment 3 between RF signal output 301 and coupled capacitor 302
A microstrip line coarse adjustment inductance 304 is also provided with a microstrip line coarse adjustment inductance 305 and one in the other side of coupled capacitor 302
Microstrip line fine tuning inductance 306.Wherein, microstrip line coarse adjustment inductance 304 and microstrip line coarse adjustment inductance 305 are used such as the present invention preferably
The microstrip line coarse adjustment inductance of embodiment 1.Microstrip line fine tuning inductance 303 includes two vertical distributions of setting on a printed-wiring board
Microstrip line 3031 and microstrip line 3032, the head of microstrip line 3031 connects RF signal input end 301, in microstrip line 3031
Tail portion is equipped with first pad 3033, and the head of microstrip line 3032 is connected with microstrip line coarse adjustment inductance 304, in microstrip line
3032 tail portion is equipped with second pad 3034, the first pad 3033 and the second pad 3034 for connecting a resistance-capacitance device
Part is the center of circle, using the length of capacitance resistance ware as a third pad is also at least arranged on the circumference of radius using the first pad 3033
3035, the 4th pad 3036, the 5th pads, 3037, the 6th pads 3038, the second pad 3034 and third weldering
It is connected between disk 3035 by third microstrip line, is connected between third pad 3035 and the 4th pad 3036 by the 4th microstrip line
It connects, pass through the connection of the 5th microstrip line, the 5th pad 3037 and the 6th pad between the 4th pad 3036 and the 5th pad 3037
It is connected between 3038 by the 6th microstrip line, the first pad 3033 and third pad 3035, the 4th pad 3036, the 5th pad
3037, one capacitance resistance ware of connection, the center of circle to the line between each adjacent pad are used between the 6th pad 3038
Between angle be 45 degree.Reach fine tuning microstrip line inductance by welding different capacitance resistance wares between different pads
Purpose.Microstrip line fine tuning inductance 306 also with two vertical distributions microstrip line 3061 and 3062,3061 one end of microstrip line with it is micro-
Band line coarse adjustment inductance 305 connects, and pad is arranged in one end, and pad, one end and radio-frequency measurement device 300 is arranged in 3062 one end of microstrip line
In other circuit units, between microstrip line 3061 and microstrip line 3062 pad distribution and connection with microstrip line fine tuning inductance
303 is identical, and I will not elaborate.
Referring to Fig. 4, the equivalent circuit of coupled capacitor 302 include equivalent capacity C41, equivalent capacity C42, equivalent capacity C43,
Equivalent inductance L43 and equivalent resistance R41, wherein equivalent capacity C42 is the equivalent capacitance of coupled capacitor 302；Equivalent capacity
C41 and equivalent capacity C43 is coupled capacitor 302 in connection, two equivalent capacity equivalent inductance L41 that pad generates over the ground
It is the equivalent of fine tuning micro-strip inductance 303, equivalent inductance L42 is the equivalent of coarse adjustment micro-strip inductance 304, and equivalent inductance L44 is coarse adjustment
Micro-strip inductance 305 it is equivalent, equivalent inductance L45 is the equivalent of fine tuning micro-strip inductance 306.
Since the equivalent inductance L43 and equivalent resistance R41 of coupled capacitor 302 are smaller, play a crucial role in this circuit
Be equivalent capacity C42, equivalent capacity C41 and equivalent capacity C43.Again due to the capacitance of equivalent capacity C42 be far longer than it is equivalent
The capacitance of capacitor C41 and equivalent capacity C43, for high-frequency signal, the capacitive reactance very little of C42 can be ignored, it is possible to will wait
Capacitor C42 short circuit processing is imitated, in addition the value very little of equivalent inductance L43 and equivalent resistance R41, final result is influenced and unknown
It is aobvious, therefore ignored.
Circuit entire in this way can be reduced to equivalent inductance L46 as shown in Figure 5, equivalent capacity C44, equivalent capacity
The form of the T-shape low-pass filter of C45, equivalent inductance L47 composition.Here C44=C41, C45=C43；By two inductance
L41, L42 are equivalent to an inductance L46 and are easy for analyzing, and the value of inductance L46 is equal to the sum of two inductance L41, L42；Inductance
The value of L47 is equal to the sum of two inductance L44, L45.Pass through the value of selected inductance L46 and inductance 47 appropriate, so that it may improve
Entire Circuit Matching characteristic, namely improve standing wave.
As other citing, in this illustration, microstrip line coarse adjustment can be only set in the two sides of coupled capacitor 302
Inductance 304 and 305；Microstrip line fine tuning inductance 303 and 306 can also be only set in the two sides of coupled capacitor 302；It can also be in coupling
Microstrip line coarse adjustment inductance 304 and microstrip line fine tuning inductance 306 is respectively set in the two sides for closing capacitor 302；It can also be in coupled capacitor
Microstrip line fine tuning inductance 303 and microstrip line coarse adjustment inductance 305 is respectively set in 302 two sides；It can also be by microstrip line fine tuning inductance
303 with 304 transposition of microstrip line coarse adjustment inductance；Microstrip line fine tuning inductance 306 and microstrip line coarse adjustment inductance 305 are mutually replaced
It sets.
As other citing, in this illustration, microstrip line coarse adjustment inductance 304 and microstrip line coarse adjustment inductance 305
It can be using the microstrip line coarse adjustment inductance such as the preferred embodiment of the present invention 2.
As other citing, in this illustration, the capacitive part in radio-frequency measurement device 300 is also possible to
The microstrip line fine tuning inductance such as this preferred embodiment 3 also can be set in the ESD protective device two sides in ESD protective device
303, microstrip line coarse adjustment inductance 304, microstrip line coarse adjustment inductance 305 and microstrip line fine tuning inductance 306.
Referring to Fig. 6, the microstrip line fine tuning inductance 600 of the preferred embodiment of the present invention 4 includes being arranged on a printed-wiring board
Two microstrip lines 601 and microstrip line 602 in an angle of 90 degrees distribution are equipped with the first pad 603 in the tail portion of microstrip line 601, micro-
Tail portion with line 602 is equipped with the second pad 604, can connect a resistance-capacitance device between the first pad 603 and the second pad 604
Part is the center of circle, using the length of the capacitance resistance ware also to set gradually third pad on the circumference of radius using the first pad 603
605, the 4th pad 606, the 5th pad 607, the 6th pad 608, the 7th pad 609, the second pad 604 and third pad 605
Between connected by microstrip line 61, pass through the connection of microstrip line 62, the 4th pad 606 between third pad 605 and the 4th pad 606
And the 5th between pad 607 by being connected between the connection of microstrip line 63, the 5th pad 607 and the 6th pad 608 by microstrip line 64
It connects, connected between the 6th pad 608 and the 7th pad 609 by microstrip line 65, the company of the first pad 603 and the second pad 604
Angle between line, with the first pad 603 and the line of third pad 605 is 45 degree；First pad 603 and third pad 605
Line, the angle between the first pad 603 and the line of the 4th pad 606 is 45 degree；First pad 603 and the 4th pad
Angle between 606 line, with the first pad 603 and the line of the 5th pad 607 is 45 degree；And so on.First pad
Can it connect between 603 and third pad 605, the 4th pad 606, the 5th pad 607, the 6th pad 608 and the 7th pad 609
Connect a capacitance resistance ware.Radio-frequency measurement device shown in Fig. 3 can be set in the microstrip line fine tuning inductance 600 of this preferred embodiment
In 300, for improving entire Circuit Matching characteristic, namely improvement standing wave.
In the preferred embodiment, in order to which more pads are arranged, the tail portion of microstrip line 601 is thin compared with head.As in addition
Citing, in this illustration, in order to which more pads are arranged, can select the thinner microstrip line of entirety be used as micro-strip
Line 601.As other citing, microstrip line 601, microstrip line 602 can be with wide isometric, the width of microstrip line 601, microstrip line 602
Degree can be designed according to 120 ohmage lines, since on identical plate, the impedance value of microstrip line is phase with the width of microstrip line
It closes, microstrip line 601, can choose the impedance line of different ohmic values to design at microstrip line 602, therefore microstrip line 601, micro-strip
Line 602 can not also wide Length discrepancy.
As other citing, in this illustration, the angle between microstrip line 601 and microstrip line 602 can be 90
Any angle other than degree.
As other citing, in this illustration, angle between the first pad 603 and each pad line can be with
It is any angle other than 45 degree.
It is above-described to be merely a preferred embodiment of the present invention, it should be understood that the explanation of preferred embodiment above is only
It is to be used to help understand method and its core concept of the invention, is not intended to limit the scope of protection of the present invention, it is all in this hair
Any modification for being made within bright thought and principle, equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of radio-frequency measurement device including microstrip line fine tuning inductance, including a printed wiring board, a capacitive part,
It is characterized in that, in one microstrip line fine tuning inductance of at least side of capacitive part series connection, the microstrip line fine tuning inductance packet
Two the first microstrip lines and the second microstrip line being distributed at an angle of setting on a printed-wiring board are included, it is micro- described first
Tail portion with line is equipped with first pad, is equipped with second pad, first weldering in the tail portion of second microstrip line
Disk and second pad are for connecting a capacitance resistance ware, using first pad as the center of circle, with the length of the capacitance resistance ware
Degree is that a third pad is also at least arranged on the circumference of radius, passes through third micro-strip between second pad and third pad
Line connection, first pad and the third pad are for connecting a capacitance resistance ware.
2. radio-frequency measurement device according to claim 1, which is characterized in that using first pad as the center of circle, with described
The length of capacitance resistance ware be radius circumference on also set gradually the 4th pad, the 5th pad, the 6th pad,
One the 7th pad, between the third pad and the 4th pad by the 4th microstrip line connection, the 4th pad and
By being connected between the connection of the 5th microstrip line, the 5th pad and the 6th pad by the 6th microstrip line between 5th pad
Connect, between the 6th pad and the 7th pad by the 7th microstrip line connect, the center of circle to each adjacent pad it
Between line between angle be 45 degree, first pad and the 4th pad, the 5th pad, the 6th pad and the 7th weldering
One capacitance resistance ware of connection is used between disk.
3. radio-frequency measurement device according to claim 2, which is characterized in that when using first pad as the center of circle, with institute
When the length for stating capacitance resistance ware is multiple pads provided circumferentially about of radius, the tail portion of first microstrip line is thin compared with head.
4. radio-frequency measurement device according to claim 1,2 or 3, which is characterized in that in the microstrip line fine tuning inductance
Side is also connected a microstrip line coarse adjustment inductance, the microstrip line coarse adjustment inductance, including two on a printed-wiring board are arranged
The first microstrip line and the second microstrip line being serially distributed are equipped with first pad in the tail portion of first microstrip line, in institute
The head for stating the second microstrip line is equipped with second pad, in the printed wiring board, in first microstrip line and described
At least side of second microstrip line also sets up the adjustment section being made of microstrip line, it is at least corresponding in the adjustment section described in
One the 4th pad of position setting that the position of first pad is arranged a third pad, at least corresponds to second pad, appoints
One capacitance resistance ware of welding is used between a pair of pad disposed in parallel of meaning.
5. radio-frequency measurement device according to claim 1,2 or 3, which is characterized in that the capacitive part is ESD protector
Part.
6. radio-frequency measurement device according to claim 4, which is characterized in that the capacitive part is ESD protective device.
7. a kind of microstrip line fine tuning inductance, including two the first micro-strips being distributed at an angle on a printed-wiring board are arranged
Line and the second microstrip line, which is characterized in that it is equipped with first pad in the tail portion of first microstrip line, it is micro- described second
Tail portion with line is equipped with second pad, and first pad and second pad are used to connect a capacitance resistance ware, with
First pad is the center of circle, using the length of the capacitance resistance ware as a third pad is also at least arranged on the circumference of radius,
It is connected between second pad and third pad by third microstrip line, first pad and the third pad are for connecting
Connect a capacitance resistance ware.
8. microstrip line fine tuning inductance according to claim 7, which is characterized in that using first pad as the center of circle, with institute
The length of capacitance resistance ware is stated also to set gradually the 4th pad, the 5th pad, the 6th weldering on the circumference of radius
Disk, the 7th pad pass through the connection of the 4th microstrip line, the 4th pad between the third pad and the 4th pad
And the 5th between pad by passing through the 6th microstrip line between the connection of the 5th microstrip line, the 5th pad and the 6th pad
It is connected between connection, the 6th pad and the 7th pad by the 7th microstrip line, the center of circle to each adjacent pad
Between line between angle be 45 degree, first pad and the 4th pad, the 5th pad, the 6th pad and the 7th
One capacitance resistance ware of connection is used between pad.
9. microstrip line fine tuning inductance according to claim 8, which is characterized in that when using first pad as the center of circle, with
When the length of the capacitance resistance ware is multiple pads provided circumferentially about of radius, the tail portion of first microstrip line is thin compared with head.
10. according to microstrip line fine tuning inductance described in claim 7,8 or 9, which is characterized in that the capacitance resistance ware is 0 ohm
Chip-R.
11. according to microstrip line fine tuning inductance described in claim 7,8 or 9, which is characterized in that the capacitance resistance ware is patch electricity
Hold.
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| CN105242109B (en) * | 2014-07-08 | 2019-12-13 | 苏州普源精电科技有限公司 | Radio frequency measuring device with microstrip line coarse tuning inductor and microstrip line coarse tuning inductor |
| CN107872919A (en) * | 2016-09-23 | 2018-04-03 | 宇龙计算机通信科技(深圳)有限公司 | Impedance matching circuit plate, antenna and terminal |
| CN112821907B (en) * | 2020-12-31 | 2022-06-21 | 锐石创芯(深圳)科技股份有限公司 | Input impedance matching network and radio frequency front end module |
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