CN207866904U - A kind of device of adjustable RF circuit impedance - Google Patents
A kind of device of adjustable RF circuit impedance Download PDFInfo
- Publication number
- CN207866904U CN207866904U CN201721774515.2U CN201721774515U CN207866904U CN 207866904 U CN207866904 U CN 207866904U CN 201721774515 U CN201721774515 U CN 201721774515U CN 207866904 U CN207866904 U CN 207866904U
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- China
- Prior art keywords
- wheel disc
- adjustable
- shell
- detection probe
- impedance
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- Legal status (The legal status 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 status listed.)
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Abstract
The utility model provides a kind of device of adjustable RF circuit impedance, including：Impedance unit, detection probe, shell, wheel disc and the rotatable knob being connect with the wheel disc of at least two different resistance values, wherein the impedance unit is fixed on the wheel disc；The center of the wheel disc is connected with the rotatable knob centrally through a connecting rod, and the wheel disc can be rotated by rotating the knob；The detection probe be one end fix inside the shell, the other end stretch out side by side two probes of shell, the detection probe is located at the both ends electric connection of two stitch of one end in shell with any impedance unit.The device can solve the problem of the inefficiency brought when radio circuit debugging because frequently replacing device, dismounting topology.
Description
Technical field
The present invention relates to radio frequency capacitance and inductance field, more particularly to a kind of device of adjustable RF circuit impedance.
Background technology
Microstrip line is the microwave transmission line being made of the plain conductor band propped up on dielectric substrate, is suitble to making microwave integrated
The planar structure transmission line of circuit, RF component are inductively or capacitively.Compared with metal waveguide, with small, weight
Gently, service band is wide, the high advantages such as low with manufacturing cost of reliability.In the prior art, multiple detection electricity are reserved on the microstrip line
Perhaps inductance pad can realize the adjustment of capacitor's capacity and inductance inductance value by changing above-mentioned inductively or capacitively quantity.Penetrating
In frequency circuit debugging process, when needing replacing RF component, needs to constantly change radio frequency on microstrip line inductively or capacitively, seek
It looks for optimum capacitance value and optimal inductance value to realize impedance matching, and then achievees the purpose that return loss rate is minimum, signal quality is optimal.
When replacing RF component, traditional way is to replace the RF component on pcb board by using heat gun, by
It is smaller in RF component encapsulation, it needs to expend the more time when RF component can be caused to replace, and then cause working efficiency low
Under problem.After having replaced element every time, need to re-start test topology, restart model machine, input instruction, then again into
Row test.In addition, after reconnecting topology, line loss may change, this multiple to introduce unnecessary trouble
Restart the method that model machine is debugged and also results in the low problem of working efficiency.
Meanwhile after this traditional replacing options are applied in radio circuit, final products can be caused still to retain multiple
The pad of RF component can cause the waste of pcb board；Again, if in replacing RF component, inductively or capacitively merge multiple
For one inductively or capacitively when, the length of microstrip line can change, and impedance is caused to change, and cause unnecessary mistake
Difference.
Invention content
The purpose of this utility model is that：When solving radio circuit debugging in the prior art, because frequently replacing radio-frequency devices,
The problem of inefficiency that dismounting is topological and brings, provide a kind of device of adjustable RF circuit impedance.
To achieve the goals above, the present invention provides a kind of device of adjustable RF circuit impedance, at least two is different
Impedance unit, detection probe, shell, wheel disc and the knob being connect with the wheel disc of resistance value, the impedance unit are fixed on
On the wheel disc, the center of the wheel disc is connected with the rotatable knob centrally through a connecting rod, by rotating the rotation
Button can rotate the wheel disc；The detection probe be one end fix inside the shell, the other end stretch out shell side by side two
Root probe, the detection probe is located at two stitch of one end in shell and any impedance unit is electrically connected.
Specifically, inductance and PCB pads that capacitance or inductance value that the impedance unit is determined by capacitance determine form.
Specifically, PCB pads both ends are respectively arranged with the sheet metal being separated from each other, the both ends inductively or capacitively
It is separately fixed at the part metals on piece at the pad both ends, remainder sheet metal is close to PCB pad edges, structure protrusion
To ensure that the detection probe can be free to slide on the impedance unit surface.
Specifically, being equipped with metal slide plate on each stitch of the detection probe, the detection probe is located at shell
Two interior stitch and the sheet metal structure of the impedance unit both ends protrusion are electrically connected by the metal slide plate.
Specifically, the impedance unit, when being arranged on wheel disc, the level height of center is consistent.
Specifically, offering a small window at shell below the knob, the knob rotation can be shown in the small window
Corresponding capacitor's capacity or inductance inductance value when to current location.
Specifically, the angle adjustable between the detection probe.
Specifically, described device further includes shielding case so that the wheel disc is completely disposed in the shielding case.
The device can be solved when Hardware Engineer's radio frequency is debugged, and the radio frequency electrical that need not be replaced on microstrip line is perhaps electric
The problem of sympathetic capacitance that can find optimal capacitance or the inductance of inductance value realize impedance matching, helps to improve radio circuit tune
The efficiency of examination.
Description of the drawings
Fig. 1 is a kind of structural front view of utility model device；
Fig. 2 is radio frequency capacitance cellular construction vertical view；
Fig. 3 is radio frequency capacitance cellular construction front view.
Specific implementation mode
In order to make relevant technical staff in the field more fully understand technical scheme of the present invention, below in conjunction with of the invention real
The attached drawing for applying mode is clearly and completely described the technical solution in the utility model embodiment, it is clear that described
Embodiment be only some embodiments of the invention, rather than whole embodiment.
Embodiment 1 provides a kind of front view of structure of utility model device.
As described in Figure 1, present apparatus component part is：The impedance units 10 of at least two different resistance values, detection probe 11 with
And the metal slide plate 12, shell 13, wheel disc 14, knob 15 and the center of wheel disc that are set on detection probe stitch and the center of knob
Connected connecting rod 16, small window 17 and shielding case 18.
Ordinary circumstance exists, in radio circuit, it is only necessary to debugging radio-frequency circuit inductively or capacitively, therefore, the device
Impedance unit includes two kinds of capacitor cell and inductance unit, since inductance is similar with the installation drawing of capacitance, in theory below
Only illustrate the structure of utility model device in bright by taking capacitor cell as an example.
Wherein, the impedance unit 10 is made of the capacitance 100 and PCB pads 101 of high-precision capacitance.Pad 101
It is provided at both ends with the sheet metal 102 being separated from each other.Under normal circumstances, it since the packaging method of radio frequency capacitance is consistent, uses
0201 mode encapsulates, and only rare occasion is using 0402 encapsulation, therefore, when considering the size of pad, it is only necessary to consider this
Two kinds of situations, when design, should be ensured that the capacitance can be secured entirely on the pad.The structure of the sheet metal is " L "
Shape structure, the low one end put down so as to fixed capacity in the side far from pad edge are convex close to the side of pad edge protrusion
Play the height that height is slightly above capacitance.The length for being smaller than capacitance between the sheet metal of two separation so that the two of capacitance
End can be welded and fixed with sheet metal far from the low flat part of pad edge, simultaneously, it should be noted that each sheet metal exists
Close to the side of PCB edge protrusion, the slightly above height of capacitance, which is electrically connected with detection probe so that the inspection
Probing needle can be free to slide on the impedance unit surface.The overall structure vertical view and front view of the radio frequency capacitor cell are distinguished
As shown in Figures 2 and 3.
Specifically, when selecting the material of sheet metal, high conductivity, low parasitic inductance, low resistance parameter should be selected
Material, when being made on pad, using turmeric technique, deposited colors are stable on PCB pads, brightness is good, coating is smooth
Nickel gold plate.
According to the needs that radio frequency is debugged, the impedance unit needed for multiple debugging is made, as shown in Figure 1, required for debugging
Impedance unit be C1, C2, C3, C4, C5, C6, C7.Then, the impedance unit of these different resistance values is sequentially fixed at the wheel
On disk, simultaneously, it should be ensured that the center of all impedance units is located in same horizontal line.The center of the wheel disc and rotatable knob
Centrally through a connecting rod be connected, can rotate the wheel disc by rotating the knob；Detection probe is that one end is fixed inside the shell
Side by side two probes of shell are stretched out in side, the other end, which is located at two stitch of one end in shell and any institute
The sheet metal for stating impedance unit both ends protrusion is electrically connected.User when in use, rotates the knob, can be under the drive of connecting rod
The turntable is rotated, to change the impedance unit being connected with detection probe, and then achievees the purpose that change capacitive reactance or induction reactance.For
The specific capacitive reactance being electrically connected with detection probe when can intuitively show that the knob rotates to any position or induction reactance number
Value, spy open up a small window on the shell below the knob, which can be used for showing that the knob rotates to current location
When corresponding capacitor's capacity or inductance inductance value.
Contact for convenience of detection probe with impedance unit, spy are all provided on the stitch that detection probe is connect with impedance unit
Metal slide plate, which is located at two stitch in shell and the sheet metal structure of the impedance unit both ends protrusion passes through
The metal slide plate is electrically connected.It should be pointed out that the metal slide plate and probe are high conductivity, low parasitic inductance, low electricity
The material of resistance parameter can rotate when knob with runner disc, be connected with detection probe on wheel disc to change
Impedance unit.
In addition, it is necessary to which, it is noted that the angle of the detection probe can be adjusted, mainly in view of two kinds of situations：When
Work as debugging radio-frequency circuit, need connect a radio frequency electrical perhaps radio frequency inductive when, very easily detection probe can be linked into
In dead circuit；Two, which allow for the detection probe, needs to adapt to the different encapsulation feelings of different radio frequency electricals perhaps radio frequency inductive
Condition, the adjustable angle between two detection probes, can easily be suitable for different encapsulation situations.Meanwhile metal slide plate
Length need it is short as possible, with reduce detection capacitance loop and other parasitic parameters exchange test strip come influence.
Specifically, since radio circuit is high-frequency signal, shielding case is added, external noise can be effectively prevent to be coupled into circuit
In, influence the stability and accuracy of test.
Specifically, there is the small window that can show the corresponding capacitive reactance of current connected impedance or induction reactance numerical value, just on shell
In the observation of tester, meanwhile, the structure inside can effectively protect device is gone back, so that whole device is more minimized, portability.
Specifically used method is, when needing to debug a certain element in parallel difference impedance when the performance of radio circuit, first
Probe, is connected to the both ends of radio frequency circuit components by the width for adjusting outer two stitch of shell, then passes through turn knob, adjustment
The impedance unit being connect with the detection probe other end is often adjusted to change with the element in parallel inductively or capacitively and once reads one
The end value of secondary test.In addition, often an impedance unit in parallel can not obtain best test value, when debug circuit needs
When one impedance unit of series connection, it would be desirable to which the circuit of corresponding position disconnects in debugging radio-frequency circuit, then by the crust of the device
Outer two stitch are connected respectively to the both ends of disconnecting circuit, similar to the above process, often adjust the end value for once reading once to test.
When test value is optimal value, capacitive reactance or the induction reactance numerical value of the access that small window is shown, the as Configuration Values of our needs are read,
Then the device is removed, and according in the capacitive reactance read and induction reactance numerical value welding practical devices to the circuit of corresponding position.
The once-through operation, which is equivalent to, replaces a RF component, dismounts primary topology, restarts a model machine, repeat this
Process, so that it may while with radio frequency capacitance on being changed without microstrip line, find and best inductively or capacitively realize impedance
The purpose matched, simple and convenient, operability is strong, and operating efficiency is high.
Only several embodiments of the present invention are expressed above, the description thereof is more specific and detailed, but can not therefore and
It is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for those of ordinary skill in the art, not taking off
Under the premise of present inventive concept, various modifications and improvements can be made, these are all within the scope of protection of the present invention.Cause
This, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of device of adjustable RF circuit impedance, which is characterized in that the impedance unit of at least two different resistance values, detection are visited
Needle, shell, wheel disc and the knob being connect with the wheel disc, the impedance unit are fixed on the wheel disc, the wheel disc
Center is connected with the knob centrally through a connecting rod, and the wheel disc can be rotated by rotating the knob；The detection
Probe be one end fix inside the shell, the other end stretch out side by side two probes of shell, the detection probe is located at shell
Two stitch of interior one end are electrically connected with any impedance unit.
2. the device of adjustable RF circuit impedance according to claim 1, which is characterized in that the impedance unit is by capacitance
The inductance and PCB pads composition that determining capacitance or inductance value determine.
3. the device of adjustable RF circuit impedance according to claim 2, which is characterized in that PCB pads both ends point
It is not provided with the sheet metal being separated from each other, the both ends inductively or capacitively are separately fixed at the part metals at pad both ends
On piece, remainder sheet metal is close to PCB pad edges, and structure protrusion is to ensure that the detection probe can be in the impedance
Cell surface is free to slide.
4. the device of adjustable RF circuit impedance according to claim 3, which is characterized in that the detection probe it is each
Metal slide plate is equipped on a stitch, the detection probe is located at two stitch and impedance unit both ends protrusion in shell
Sheet metal structure be electrically connected by the metal slide plate.
5. the device of adjustable RF circuit impedance according to claim 1, which is characterized in that the impedance unit is in wheel disc
When upper arrangement, the level height of center is consistent.
6. the device of adjustable RF circuit impedance according to claim 1, which is characterized in that the shell below the knob
Place offers a small window, and corresponding capacitor's capacity or inductance sense when the knob rotates to current location can be shown in the small window
Value.
7. the device of adjustable RF circuit impedance according to claim 1, which is characterized in that between the detection probe
Angle adjustable.
8. the device of adjustable RF circuit impedance according to claim 1, which is characterized in that described device further includes shielding
Cover so that the wheel disc is completely disposed in the shielding case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721774515.2U CN207866904U (en) | 2017-12-18 | 2017-12-18 | A kind of device of adjustable RF circuit impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721774515.2U CN207866904U (en) | 2017-12-18 | 2017-12-18 | A kind of device of adjustable RF circuit impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207866904U true CN207866904U (en) | 2018-09-14 |
Family
ID=63465174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721774515.2U Expired - Fee Related CN207866904U (en) | 2017-12-18 | 2017-12-18 | A kind of device of adjustable RF circuit impedance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207866904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559558A (en) * | 2019-08-19 | 2019-12-13 | 南京从景生物技术有限公司 | Novel radio frequency emission source |
-
2017
- 2017-12-18 CN CN201721774515.2U patent/CN207866904U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559558A (en) * | 2019-08-19 | 2019-12-13 | 南京从景生物技术有限公司 | Novel radio frequency emission source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180914 Termination date: 20181218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |