CN2254592Y

CN2254592Y - Electromagnetic wave transmission switching device

Info

Publication number: CN2254592Y
Application number: CN 95224873
Authority: CN
Inventors: 魏士桂
Original assignee: Microelectronics Technology Inc
Current assignee: Microelectronics Technology Inc
Priority date: 1995-10-23
Filing date: 1995-10-23
Publication date: 1997-05-21
Anticipated expiration: 2005-10-23

Abstract

The utility model discloses an electromagnetic wave transmission switching device, which is a structure composed of metal probes provided separately, and a printed probe on a printed circuit board. The device is used for receiving vertical and horizontal signals, and through the structural adjustment of inner position, achieves the purpose of improving signal isolation. In another embodiment of the utility model, printed short circuit lead wire is replaced by another metal column, to realize the improvement of the isolation degree.

Description

The electromagnetic transmission conversion equipment

The utility model relates in the waveguide, the improvement of the Signal Spacing degree of two probe structures.Detailed it, the utility model relates to a kind of metal probe that utilizes separate configuration and printing probe to improve the electromagnetic transmission conversion equipment of the isolation between vertical and horizontal signal.

On EM theory, waveguide can be used to transmit electromagnetic wave, and electromagnetic wave can convert current signal to by the metal probe that is arranged on waveguide inside.Shown in Figure 1A, 1B, promptly in the long rectangular wave conduit, the one end is sealed to form the short circuit tool back plane, locate and a metal probe vertically set up apart from short circuit tool back plane 1/4 λ g (λ g is a wavelength), then can convert the vertical electromagnetic wave signal that transmits by the square waveguide other end to current signal, for the usefulness of back level electronic circuit.

But, only can receive the electromagnetic wave signal of perpendicular polarization as the setting of Figure 1A, 1B.Receive simultaneously vertically and level polarization signal as desiring, then one of method adopts circular waveguide and vertical level two probes that reach is set to receive vertical and two polarized signals of level respectively respectively shown in Fig. 2 A, 2B.But because this two probe is arranged on the same plane apart from short circuit tool back plane 1/4 λ g, therefore when Vertrical probe received the perpendicular polarization signal, the while had also been picked up certain a part of horizontal polarization signal.On using, wish that the horizontal signal intensity of picking up is the smaller the better on Vertrical probe, and vice versa, this is the isolation (isolation) between the signal.Generally speaking isolation is the bigger the better.Yet as the device of Fig. 2 A, 2B, two probes (distance reflection short circuit tool back plane 1/4 λ g) in the same plane, that is the strongest place of reflected signal.Therefore Vertrical probe also receives the horizontal signal of strengthening most except receiving vertical signal.Though so, still have necessity of improvement by vertical direction is set reaches to a certain degree Signal Spacing degree (about 15-20dB) of two probes.

The purpose of this utility model is to provide a kind of combination that utilizes the printing probe on metal probe and the plated circuit, and utilizes suitable spatial configuration, and reaches the purpose of improving the Signal Spacing degree, and can improve the Signal Spacing degree and reach more than the 30dB.

The short-circuit conductors that another purpose of the present utility model is to utilize another metal column to replace the printed circuit board (PCB) in the former pair of probe combinations is to improve the isolation of signal.

According to of the present utility model a kind of in order to receive the electromagnetic transmission conversion equipment of microwave signal, this microwave signal is from a waveguide feed-in, waveguide is coupled to a mechanism body, and the axle center of waveguide is perpendicular to the plane of mechanism body, this electromagnetic transmission conversion equipment comprises: a metal probe, the one end stretches out in the waveguide, and the other end then is coupled to a circuit board that places in the mechanism body, imports as one of board circuit in order to first composition that receives microwave signal; One printing probe, one are rectified and to be met at the end that this metal probe stretches out in waveguide, and the other end then is coupled to circuit board, in order to another input as board circuit of second composition that receives microwave signal;

Wherein should printing probe the one section printed wire that is this circuit board on the one side of waveguide, this section printed wire is centered on by an annular tin face but is non-intersect, annular tin face be provided with perforation with the feedthrough of circuit board another side, and the circuit board another side is provided with the short circuit tool back plane of a short-circuit conductors as metal probe with respect to the inner diameter zone of annular tin face, promptly print probe with the diapire of a crown cap as the short circuit tool back plane, the footpath is identical within this crown cap, annular tin face and the waveguide, and in regular turn in conjunction with and constitute the circular waveguide of a back-end closure.

According to the electromagnetic transmission conversion equipment of another kind of the present utility model in order to the reception microwave signal, this microwave signal is from a waveguide feed-in, waveguide is coupled to a mechanism body, and the axle center of waveguide is perpendicular to the plane of mechanism body, this electromagnetic transmission conversion equipment comprises: a metal probe, the one end stretches out in the waveguide, and the other end then is coupled to a circuit board that places in the mechanism body, imports as one of board circuit in order to first composition that receives microwave signal; One printing probe, one are rectified and to be met at the end that this metal probe stretches out in waveguide, and the other end then is coupled to circuit board, in order to another input as board circuit of second composition that receives microwave signal;

Wherein should printing probe the one section printed wire that is this circuit board on the one side of waveguide, this section printed wire is centered on by an annular tin face but is non-intersect, annular tin face be provided with perforation with the feedthrough of circuit board another side, be provided with the short circuit tool back plane of a metal column and be close to this circuit board another side with respect to the inner diameter zone of annular tin face as metal probe, and the printing probe with the diapire of a crown cap as the short circuit tool back plane, the footpath is identical within this crown cap, annular tin face and the waveguide, and in regular turn in conjunction with and constitute the circular waveguide of a back-end closure.

Adopt electromagnetic transmission conversion equipment of the present utility model, because a metal probe and a printing probe are combined, and between two probes, suitable distance is set, thus reached the purpose of improving the Signal Spacing degree.

Above-mentioned and other purpose, effect and the advantage of the utility model can be consulted the detailed description of hereinafter preferred embodiment, and accompanying drawings, and obtains clearer understanding.

Figure 1A, 1B are respectively the front view and the end view of conventional probe structure;

Fig. 2 A, 2B are respectively the front view and the end view of traditional double probe structure;

Fig. 3 is the schematic diagram of the preferred embodiment of the utility model;

Fig. 4 is the side combination schematic diagram of the utility model structure;

Fig. 5 is the structure chart of probe P1;

Fig. 6 A, 6B are respectively the front and the rear view of the printing probe circuitry of printed circuit board (PCB) in the utility model structure;

Fig. 7 is the electromagnetic transmission functional analysis figure of the utility model structure; And

Fig. 8 is another preferred embodiment schematic diagram of the present utility model.

Referring to Fig. 3, Fig. 4, a circular metal waveguide Q1 is vertical with mechanism body Q2 and is connected.Mechanism body Q2 is used for placing printed circuit board (PCB) B1, and the plane of printed circuit board (PCB) B1 is also axially perpendicular to waveguide Q1.The junction of mechanism body Q2 and waveguide Q1 is a round hole that hollows out, and its diameter is identical with footpath within the waveguide Q1.Extend in addition the part of mechanism body Q2 in the inside of circular waveguide Q1, be provided with a cylinder hole L1, its outlet in circular waveguide Q1 is H1, then is H2 in the outlet of mechanism body Q2.The metal of some angles that probe P1 is a bending is rod carefully, and its angle bending is on deciding with the binding site of printed board circuit, and is divided into 2 parts by the bending point, and promptly P11 and P12 also see also Fig. 5.Wherein the part of P11 is passed by the inner outlet of circular waveguide Q1 H1, and P12 then is positioned at cylinder hole L1 the inside, and only sub-fraction is passed with circuit on the printed circuit board (PCB) by the outlet H2 of mechanism body Q2 and combines.The length of metal probe P11 is about 1/4 λ g.

See also Fig. 6 A, the circular tin face of (face of waveguide Q1 dorsad) etching one ring-band shape C1 on printed circuit board (PCB) B1 front, its internal diameter is identical with footpath within the circular waveguide Q1, and bores the back side tin face conducting formation ground connection that a little roundlets hole makes tin face and printed circuit on the tin face.In C1 and stay a breach, allow printing strip probe P2 be passed.

In the present embodiment, its direction of the P11 of metal probe P1 part is vertical direction, and its direction of strip printed circuit strip probe P2 then is the direction of level.On printed circuit board (PCB), must be drilled with in addition a circle hole H3, its position when combination must with the outlet H2 overlaid of the cylinder hole L1 of mechanism body Q2 combine with the circuit of back grade so that allow probe P1 be passed.That is P1 is as the input of vertical signal in the printed circuit, and then the circuit of level then comprises amplifier, frequency demultiplier and other circuit.The length of printed circuit strip probe P2 in the circular tin face of ring-type C1 ring also is about 1/4 λ g, and its other end then extends out as the signal input part of grade circuit thereafter.

See also Fig. 6 B, the back side of printed circuit board (PCB) B1, etching one border circular areas (footpath is identical within its diameter and the circular waveguide) then, and the tin face of circular interior major part removed, the tin face s1 that only keeps a bar-shape is as short-circuit conductors, and its two ends are connected with circle tin face all around respectively, and its center of circle is corresponding with the center of circle of the annular tin face C1 in printed circuit board (PCB) front, be positioned on the linear axis, the P11 partial parallel of its direction and metal probe P1 is also vertical with P2.

See also Fig. 3 and Fig. 4, Q3 is a cylindrical metal lid, the sealing of one end, and the degree of depth is about 1/4 λ g, and its internal diameter is then identical with footpath within the circular waveguide Q2.Again, circular waveguide Q1 as shown in Figure 3, annular tin face C1 on the printed circuit board (PCB) and cylindrical metal lid Q3 three's the center of circle must be positioned on the same linear axis and form the circular waveguide of a back-end closure short circuit.

Figure 7 shows that in the utility model structure the schematic diagram of waveguide probe.And cooperate transmission, the reflection of electromagnetic wave in waveguide to be explained its function.In design of the present utility model, when horizontal signal H when crown cap Q3 reflexes to probe P2, the energy maximum, and this moment vertical signal V because of stopping of banded tin face s1 arranged, so in probe P2 place, its energy minimum; When horizontal signal H when crown cap Q3 reflexes to probe P1, its energy minimum, and this moment vertical signal V by the reflection of banded tin face S1, during to probe P1, its energy maximum.Therefore (the B point of Fig. 7) can receive the strongest horizontal signal and the most weak vertical signal on the position of probe P2; And (the A point of Fig. 7) can receive the strongest vertical signal and the most weak horizontal signal on the position of probe P1.In embodiment of the present utility model, crown cap Q3 and printing probe P2 are at a distance of about 1/4 λ g, and printing probe P2 and metal probe P1 are at a distance of also being about 1/4 λ g.Through this configuration, the isolation that can make level and vertical signal is for best.

Figure 8 shows that the schematic diagram of another embodiment of the utility model.Configuration and Fig. 4 of Fig. 8 are roughly the same, and only the banded tin face s1 among Fig. 4 is replaced with metal column M1 in Fig. 8.The distance of crown cap Q3 and metal column M1, and the distance of metal column M1 and metal probe P1 all still keeps 1/4 λ g, with level and the vertical signal isolation that obtains the best.

Though the utility model illustrates in the mode of embodiment, those skilled in the art still can make all conversion not breaking away under spirit of the present utility model and the flesh and blood, but they all belong to scope of the present utility model.

Claims

1. one kind in order to receive the electromagnetic transmission conversion equipment of microwave signal, this microwave signal is from a waveguide feed-in, and waveguide is coupled to a mechanism body, and the axle center of waveguide is perpendicular to the plane of mechanism body, it is characterized in that this electromagnetic transmission conversion equipment comprises:

One metal probe, the one end stretches out in the waveguide, and the other end then is coupled to a circuit board that places in the mechanism body, imports as one of board circuit in order to first composition that receives microwave signal;

One printing probe, one are rectified and to be met at the end that this metal probe stretches out in waveguide, and the other end then is coupled to circuit board, in order to another input as board circuit of second composition that receives microwave signal;

Wherein should printing probe the one section printed wire that is this circuit board on the one side of waveguide, this section printed wire is centered on by an annular tin face but is non-intersect, annular tin face be provided with perforation with the feedthrough of circuit board another side, and the circuit board another side is provided with the short circuit tool back plane of a conductor as metal probe with respect to the inner diameter zone of annular tin face, and the printing probe with the diapire of a crown cap as the short circuit tool back plane, the footpath is identical within this crown cap, annular tin face and the waveguide, and in regular turn in conjunction with and constitute the circular waveguide of a back-end closure.

2. electromagnetic transmission conversion equipment according to claim 1 is characterized in that, being arranged at the circuit board another side is short-circuit conductors with respect to the conductor of the inner diameter zone of annular tin face.

3. electromagnetic transmission conversion equipment according to claim 1 is characterized in that, being arranged at the circuit board another side is a metal column with respect to the conductor of the inner diameter zone of annular tin face.

4. electromagnetic transmission conversion equipment according to claim 1 it is characterized in that first composition of this microwave signal is a vertical signal, and second composition is a horizontal signal.

5. electromagnetic transmission conversion equipment according to claim 1 is characterized in that the self-waveguide pipe extends to mechanism body to this metal probe via a cylinder hole.

6. electromagnetic transmission conversion equipment according to claim 2 is characterized in that this short-circuit conductors long ribbon shape tin face that to be the circuit board another side retained with respect to the tin face at annular tin face inner diameter zone place after etching.

7. electromagnetic transmission conversion equipment according to claim 1 is characterized in that this metal probe parallels with this conductor and at a distance of about 1/4 λ g.

8. electromagnetic transmission conversion equipment according to claim 1, the diapire that it is characterized in that this printing probe and this crown cap is at a distance of about 1/4 λ g.