CN1222199C

CN1222199C - Adjustable open-circuit guide circuit

Info

Publication number: CN1222199C
Application number: CN 02118901
Authority: CN
Inventors: 郑添乾
Original assignee: Mitac International Corp
Current assignee: Mitac International Corp
Priority date: 2002-04-27
Filing date: 2002-04-27
Publication date: 2005-10-05
Anticipated expiration: 2022-04-27
Also published as: CN1454038A

Abstract

The present invention relates to an adjustable open stud circuit welded with at least one preset conducting metal sheet with the same width as the tail end of the open stud circuit through solder to extend the length of the open stud to the tail end of the metal sheet. Thereby, the purpose of adjusting the total length of the tail end of the open circuit of the open stud is achieved. The adjustable open stud circuit comprises at least one conducting metal sheet with the same width as the tail end of the open circuit of the open stud, and a conducting connecting component, wherein the conducting metal sheet with the same width as the tail end of the open circuit of the open stud can also be divided into a plurality of conducting metal sheets, and the conducting metal sheets are arranged at intervals under the condition that the conducting metal sheet have the same width as the tail end of the open circuit of the open stud. In addition, the number of the conducting metal sheets arranged at intervals can be increased to form a matrix mode.

Description

Adjustable open-circuit guide circuit

Technical field

The present invention is relevant for a kind of open-circuit guide circuit (open stud circuit), especially a kind of adjustable open-circuit guide circuit (tunable open stud circuit), at least one wide presets conductive metal sheet (metal pad) to prolong this open-circuit guide length to this sheet metal end with this open-circuit guide open circuit is terminal via scolder welding (solding) for it, reaches the open a way purpose of terminal total length of this open-circuit guide of adjustment by this.

Background technology

In the field of handling the application of radio frequency (RF) and microwave (microwave), Shi Misi chart among Fig. 1 often is used to determine the problem relevant with impedance, for example, determine different impedance matching demands and the unknown resistance value of decision between each interconnecting modules (interconnected blocks).As shown in Figure 1, it uses pocket plotting mode (conformal mapping), all possible quadrature is drawn (map) by impedance,motional have on the pole figure of complex refglection coefficient of radius unit's scope (a radius of unity) in one.Wherein, central shaft is represented the equivalent resistance size of a circuit, and other curve is represented equivalent capacity and inductance value size.

Again; stability of characteristics (stable characteristics), length based on open-circuit guide (open stud) can be arbitrary value (any length) and the low advantages such as (low cost) of cost; so its regular meeting is used as in the conventional surface infrastructure component (SMD); the replacement assemblies of inductance and electric capacity (element), as shown in Figure 2.Wherein, this open-circuit guide material can be glass (glass), epoxides (epoxide), iron furlong (Teflon) or pottery.In an open-circuit guide circuit, the terminal length L of its open circuit will have influence on the position (imaginary part) that is positioned on Shi Misi figure (Smith Chart) curve, just, influences the size of its equivalent capacity (inductance) resistance value, for example, ± i2, ± i1.But, because open-circuit guide is directly to be formed on the printed circuit (printed circuit), so, in case after making sheet was finished, length of open-circuit guide was also just fixing on it, is not easy to change.So, the work of correlation debug (debug) (adjustment resistance value) can become quite difficult.

Summary of the invention

In view of the above, a purpose of the present invention provides a kind of adjustable open-circuit guide circuit, and it utilizes at least one mode that presets sheet metal (metal pad) of welding to reach adjustment open-circuit guide length and is beneficial to the order ground that debug work is carried out.

The present invention is a kind of adjustable open-circuit guide circuit, it utilizes, and welding is at least one wide preset sheet metal (metal pad) or reaching and adjust open-circuit guide length with this open-circuit guide a plurality of modes that preset sheet metal of weld interval configuration of opening a way under the terminal equal wide, reaches the purpose that is easy to debug by this with this open-circuit guide open circuit is terminal.This adjustable open-circuit guide circuit comprises: a plurality of conductive metal sheets, be placed on the terminal end of this open circuit forming matrix form configuration with leaving a blank, this matrix form configuration have the n row and m capable, wherein n is not equal to m and is all integer greater than 1; One conductibility connects material, and in order to electrically connect terminal end to the d row of this open circuit, to prolong terminal total length to the d row of this open circuit, wherein d is smaller or equal to the integer of n; And the length that this m is capable equates with the width of this open circuit end.Described conductibility coupling assembling comprises scolding tin or copper cash.On using,, make the open-circuit guide length overall reach Len req and get final product as long as connect former open-circuit guide and conductive metal sheet with scolding tin.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

Description of drawings

Fig. 1 is known Shi Misitu (Smith Chart);

Fig. 2 is the schematic diagram of typical open-circuit guide (open stud) circuit;

Fig. 3 a is with the schematic diagram of an adjustable open-circuit guide circuit of single chip mode configuration according to the present invention;

Fig. 3 b is the schematic diagram of the another kind of adjustable open-circuit guide circuit of Fig. 3 a;

Fig. 4 a is with the schematic diagram of an adjustable open-circuit guide circuit of matrix-style configuration according to the present invention; And

Fig. 4 b is the schematic diagram of the another kind of adjustable open-circuit guide circuit of Fig. 4 a.

Embodiment

Following same components is to represent with equal reference numbers.

Fig. 3 a is to be with the schematic diagram of the adjustable open-circuit guide circuit of single chip mode configuration according to the present invention.In Fig. 3 a, the conductive metal sheet 32 of sizes such as the terminal width d of one its length and this open-circuit guide (open stud) 31 open circuits is when circuit layout, in company with this open-circuit guide 31 together, this sheet metal 32 is sticked be preset in the terminal below of this open circuit one suitable distance.Stagger the time when removing, as if finding that required equivalent capacity (or inductance) value of this circuit must increase, then utilize scolder 33 that this sheet metal 32 and this open circuit end are connected shown in Fig. 3 a, terminal total length becomes L1 by L so that this open-circuit guide is opened a way.Wherein, this scolder can be for example material (material) of any electric property conduction such as tin, gold, copper.In addition, shown in Fig. 3 b, this presets the conductive metal sheet and can be plural conductive metal sheet 321,322,323, and its configuration distance can be different, be respectively L11, L12, L13, so, can weld each sheet metal in regular turn according to actual demand and adjust, thereby make equivalent capacity (or inductance) value be located in the appropriate location of Fig. 1 by being expected on 0 the circle to produce comparatively accurately.The configuration of above-mentioned conductive metal sheet, if meet its length must with this wide requirement of terminal width of opening a way, there is no the requirement of sheet metal configuration quantity or distance.Therefore, the configuration mode of following another matrix form also is feasible.

Fig. 4 a is with the schematic diagram of an adjustable open-circuit guide circuit of matrix-style configuration according to the present invention.In Fig. 4 a, under this open-circuit guide open circuit end, in order to the conductive metal sheet that extends terminal (openstud) length of this open-circuit guide open circuit is to dispose in a plurality of modes that form a line, this row length must equate with this open-circuit guide terminal width of opening a way, so that the terminal total length after scolder 33 welding of this open circuit becomes L2.Wherein, as long as leave a blank between these a plurality of sheet metals separately, not necessarily leaveing no choice but is the mode of spaced at equal intervals.Similarly, shown in Fig. 4 b, a plurality of sheet metals that form a line among Fig. 4 a can be extended to form a matrix form, have the length of L21, L22, L23, L24 respectively.The columns of above-mentioned matrix form is not limit but line number must be configured to equate with this open-circuit guide terminal width of opening a way.So, this open-circuit guide can produce required total capacitance (or inductance) value by the terminal sheet metal position that is soldered to Len req in regular turn of its open circuit.If configured length is not equal to this terminal width of opening a way, then not only be easy to generate outside the short circuit situation (short circuit), also make the adjustment of electric capacity (or inductance) value produce difficulty, even further produce the problem of parasitic capacitance (or inductance) not.Therefore, the length that is used for disposing sheet metal must equal the terminal width of this open circuit, should then decide with the thickness of this open-circuit guide by the terminal width of open circuit.

Certainly, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims

1. adjustable open-circuit guide circuit, it comprises that an open circuit is terminal, comprising:

A plurality of conductive metal sheets are placed on the terminal end of this open circuit forming matrix form configuration with leaving a blank, this matrix form configuration have the n row and m capable, wherein n is not equal to m and is all integer greater than 1;

One conductibility connects material, and in order to electrically connect terminal end to the d row of this open circuit, to prolong terminal total length to the d row of this open circuit, wherein d is smaller or equal to the integer of n;

And the length that this m is capable equates with the width of this open circuit end.

2. adjustable open-circuit guide circuit as claimed in claim 1 is characterized in that, the terminal width of this open circuit is to decide with the thickness of this open-circuit guide.

3. adjustable open-circuit guide circuit as claimed in claim 1 is characterized in that, these a plurality of conductive metal sheets are any metals that can conduct electricity.

4. adjustable open-circuit guide circuit as claimed in claim 1 is characterized in that, it is to be copper that this conductibility connects material.

5. adjustable open-circuit guide circuit as claimed in claim 1 is characterized in that, it is to be gold that this conductibility connects material.

6. adjustable open-circuit guide circuit as claimed in claim 1 is characterized in that, it is any connection material with electrical conducting power that this conductibility connects material.