Microstrip isolator
Technical Field
The invention relates to the technical field of wireless communication equipment, in particular to a microstrip isolator.
Background
In the existing wireless communication system, the transmitter is an important component, and is composed of a Power Amplifier (PA), a coupler, a circulator/isolator, a connector, a duplexer, an antenna, and the like, wherein the coupler is used for the related monitoring function of the link, the circulator or isolator is used for protecting the power amplifier tube, and the connector transmits the output signal to the duplexer. Similar designs are used in the wireless field, but as wireless communication advances, miniaturization is increasingly required.
In the prior art, the microstrip isolator comprises a cylinder with a cover, a bottom plate and a resistor, wherein the cylinder with the cover is covered on the bottom plate, an intracavity element is arranged in the inner cavity of the cylinder with the cover, the intracavity element comprises a circuit part, three pins of the circuit part protrude outwards and respectively penetrate through the back sides of the avoidance hole grooves corresponding to the outer ring surface of the cylinder with the cover to protrude out of the outer ring surface of the cylinder with the cover, one of the pins is externally connected with a resistor, in addition, the base plate correspondingly and fixedly arranged on the existing cylinder with the cover is required to be of a metal structure, the base plate is fixedly arranged on the end surface of the circuit board, this structural design is in order to guarantee that the bottom plate can fully contact with external circuit, guarantees the ground connection performance of whole structure, nevertheless because the defect of bottom plate manufacture process, the plane degree of bottom plate receives the influence, can have the possibility that has the clearance between bottom plate and external circuit, and then influences the use of whole isolator.
Disclosure of Invention
In view of the above problems, the present invention provides a microstrip isolator that can ensure sufficient grounding of the isolator and an external circuit, thereby ensuring normal use of the isolator.
A microstrip isolator has the technical scheme that: it is including taking lid cylinder, bottom plate, resistance, be provided with on the anchor ring of taking the lid cylinder and dodge the groove, take the bottom of lid cylinder admittedly in the bottom plate, take the lid cylinder with be provided with intracavity component in the cavity that the bottom plate combination formed, intracavity component is including the circuit part, the pin of the three evagination of circuit part runs through correspondingly dodge the groove, the terminal external resistance of one of them pin, its characterized in that: the bottom plate is specifically a metal and plastic mixed material structure, a metal connecting part is arranged on the bottom plate corresponding to the fixing part of the cylinder with the cover, a central metal connecting area is arranged at the central position of the bottom plate, each metal connecting part is connected to the central metal connecting area through a metal wire/metal strip embedded in the plastic, and at least one of the metal connecting parts and the central metal connecting area can be connected with an external circuit through soldering tin.
It is further characterized in that: the bottom plate is a PCB, and a printing part in the PCB is made of metal;
a plurality of connecting holes are exposed at the bottom of the central metal connecting area, the connecting holes are mutually connected through metal wires or metal strips, and the connecting holes can be used for connecting an external circuit through soldering tin;
the lower end of the cylinder with the cover is provided with a downward convex connecting bulge, a positioning hole groove is formed in the position, corresponding to the connecting bulge, of the bottom plate, the connecting bulge is fixedly arranged in the positioning hole groove through riveting or welding, and a metal connecting part is arranged on the inner wall of the positioning hole groove;
preferably, the resistor is positioned on the upper end surface of the cover plate of the cylinder with the cover, pins correspondingly connected with the resistor penetrate through the corresponding avoiding grooves and then are bent upwards to be connected with the resistor, the position, corresponding to the resistor, of the upper end surface of the cover plate is coated with solder paste, the resistor is fixedly connected with the solder paste at the corresponding position through reflow soldering, pins of non-connected resistors penetrate through the corresponding avoiding grooves and then are bent downwards, the lower ends of the pins of the non-connected resistors are positioned in the pin avoiding grooves at the corresponding position of the bottom plate, copper foils are arranged on the groove surfaces of the pin avoiding grooves, and the lower ends of the pins of the two non-connected resistors are lapped on the copper foils;
preferably, the resistor is arranged on the bottom plate, pins correspondingly connected with the resistor penetrate through the corresponding avoidance grooves and are bent downwards and then connected with the resistor, pins of non-connected resistors penetrate through the corresponding avoidance grooves and are bent downwards, the lower ends of the pins are located in the pin avoidance grooves at the corresponding positions of the bottom plate, copper foils are arranged on the surfaces of the pin avoidance grooves, and the lower ends of the pins of the two non-connected resistors are lapped on the copper foils;
the outer end of the resistor is provided with a port for detecting attenuation;
the bottom plate is also provided with a connector, the connector is directly connected with the outside, and the connector does not need to be connected with an external connector through a complex circuit, so that the space of equipment is saved;
preferably, the resistor is arranged on the bottom plate, pins correspondingly connected with the resistor penetrate through the corresponding avoiding grooves and then are connected with the resistor, pins not connected with the resistor penetrate through the corresponding avoiding grooves and then are arranged in an outward expanding mode, and the bottom plate is rectangular;
the bottom plate is provided with a connector mounting plate, the connector mounting plate is arranged perpendicular to the upper end face of the bottom plate, and a connector is fixedly mounted on one side of the connector mounting plate;
when the isolator array is arranged in a matrix, the bottom plate is rectangular, a plurality of metal connecting parts, a central metal connecting area, a positioning hole groove and a pin avoiding groove which correspond to a single isolator are combined to form a processing unit, a plurality of processing units which are arranged according to the designed rectangle are arranged on the bottom plate, single cylinders with covers and cavity elements are positioned in the corresponding positioning hole grooves on the corresponding processing units one by one, and the lower ends of the pins are positioned in the pin avoiding grooves at the corresponding positions.
The PCB is specifically arranged on the rectangular bottom plate, the matrix type isolators are arranged on the rectangular PCB, various requirements are met, multi-band use is achieved, the isolators in the whole equipment can be arranged in a centralized mode, and a large amount of space of the equipment is saved.
After the technical scheme is adopted, the external circuit is not required to be placed below the isolator through the circuit board, the isolator can be arranged at any position in the whole structure, only the metal connecting part of the bottom plate and at least one of the central metal connecting areas can be connected with the external circuit through soldering tin, the grounding is ensured, the sufficient grounding performance of the isolator and the external circuit can be ensured, the normal use of the isolator is further ensured, the position of the isolator can be reasonably arranged according to actual requirements by equipment applying the isolator, and great convenience is provided for the assembly of complete equipment.
Drawings
FIG. 1 is a schematic structural diagram of a monolithic isolator according to a first embodiment of the present invention;
FIG. 2 is a bottom view of the structure of FIG. 1;
FIG. 3 is a schematic diagram of a matrix isolator according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a monolithic isolator according to a second embodiment of the present invention;
FIG. 5 is a schematic block diagram showing the structure of a matrix isolator according to a second embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a monolithic isolator according to a third embodiment of the present invention;
FIG. 7 is a schematic view of the structure of a matrix isolator according to a third embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a monolithic isolator according to a fourth embodiment of the present invention;
FIG. 9 is a schematic block diagram showing the structure of a matrix isolator according to the fourth embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a monolithic isolator according to a fifth embodiment of the present invention;
FIG. 11 is a schematic block diagram showing the structure of a matrix isolator according to a fifth embodiment of the present invention;
FIG. 12 is a schematic structural view of a monolithic separator according to a sixth embodiment of the present invention;
the names corresponding to the sequence numbers in the figure are as follows:
the structure comprises a cylinder with a cover 1, a bottom plate 2, a resistor 3, an avoiding groove 4, an intracavity element 5, a pin 6, a metal connecting part 7, a central metal connecting area 8, a connecting hole 9, a connecting protrusion 10, a positioning hole groove 11, a cover plate 12, a pin avoiding groove 13, a port 14, a connector 15, a connector mounting plate 16, an arc part 17 and a gap 18.
Detailed Description
A microstrip isolator as shown in fig. 1, fig. 2, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 10, fig. 12: the device comprises a cylinder 1 with a cover, a bottom plate 2 and a resistor 3, wherein an avoiding groove 4 is arranged on the ring surface of the cylinder 1 with the cover, the bottom of the cylinder 1 with the cover is fixedly arranged on the bottom plate 2, an intracavity element 5 is arranged in a cavity formed by combining the cylinder 1 with the cover and the bottom plate 2, the intracavity element 5 comprises a circuit part, three convex pins 6 of the circuit part penetrate through the corresponding avoiding groove 4, the tail end of one pin 6 is externally connected with the resistor 3, the bottom plate 2 is particularly of a metal and plastic mixed material structure, a metal connecting part 7 is arranged on the bottom plate 2 at a position corresponding to the fixedly arranged part of the cylinder 1 with the cover, a central metal connecting area 8 is arranged at the central position of the bottom plate 2, each metal connecting part 7 is connected to the central metal connecting area 8 through a metal wire/metal strip (belonging to the conventional connecting structure of the existing circuit and not shown in the figure) embedded in the plastic, at least one of the metal connecting portions 7 and the central metal connecting region 8 may be connected to an external circuit by soldering.
The bottom plate 2 is specifically a PCB, and a printing part in the PCB is made of metal;
a plurality of connecting holes 9 are exposed at the bottom of the central metal connecting area 8, the connecting holes 9 belong to a conventional connecting structure of the existing circuit through metal wires or metal strips, and are not shown in the figure) to form connection with each other, and the connecting holes 9 can be used for connecting an external circuit through soldering tin;
the lower end of the cylinder 1 with the cover is provided with a connecting bulge 10 which is convex downwards, a positioning hole groove 11 is arranged on the bottom plate 2 corresponding to the connecting bulge 10, the connecting bulge 10 is fixedly arranged in the positioning hole groove 11 by riveting or welding, and the inner wall of the positioning hole groove 11 is provided with a metal connecting part 7;
the cylindrical part of the cylinder 1 with the cover is divided into three discontinuous arc parts 17 by the three avoiding grooves 4, two downward convex connecting bulges 10 are respectively arranged at the bottom of each arc part 17, and a gap 18 is reserved between the bottom surface of each arc part 17 and the upper end surface of the bottom plate 2 after the downward convex connecting bulges 10 are fixedly arranged in the corresponding positioning hole grooves 11.
The monomer isolator of the first embodiment is shown in fig. 1 and fig. 2: resistance 3 is located the up end of the apron 12 of area lid cylinder 1, pin 6 corresponding connecting resistance 3 runs through the corresponding groove of dodging 4 back and is connected to resistance 3 after bending upward, the up end of apron 12 is coated with the tin cream corresponding to the position coating of resistance 3, resistance 3 passes through reflow soldering fixed connection in the tin cream that corresponds the position (this structure is current ripe structure, not drawn in the picture), pin 6 of non-connecting resistance 3 runs through the corresponding groove of dodging 4 back and bends down, its lower extreme is located the pin of bottom plate 2 corresponding position and dodges groove 13, the groove of pin dodge groove 13 is provided with the copper foil on the surface, the lower extreme overlap joint in copper foil 13 of pin 6 of two non-connecting resistance 3.
The matrix isolator of the first embodiment, see fig. 3: the shape of bottom plate 1 is the rectangle, a plurality of metal connection parts 7 that single isolator corresponds, central metal connection region 8, locating hole groove 11, the pin dodges the combination of groove 13 and forms a processing unit, be provided with a plurality of processing units of arranging according to the design rectangle on the bottom plate 2, single cylinder 1 of taking the lid that has intracavity component 5 is positioned the corresponding locating hole groove 11 on the processing unit that corresponds one by one, the lower extreme of pin 6 is located the pin of corresponding position and dodges the groove 13, specifically be the PCB board on the bottom plate 1 of rectangle, the isolator of matrix is arranged on the rectangle PCB board, satisfy the demand of various types, realize the multifrequency section and use, make the isolator in the whole equipment can concentrate and arrange, the abundant space of equipment has been practiced thrift.
The monolithic isolator of embodiment two, see fig. 4: resistance 3 sets up on bottom plate 1, and pin 6 corresponding connecting resistance 3 runs through the corresponding groove 4 of dodging and bends downwards and be connected to resistance 3, and pin 6 of non-connecting resistance 3 runs through the corresponding groove 4 of dodging and bends downwards, and its lower extreme is located the pin of bottom plate 2 corresponding position and dodges groove 13, and the groove of pin dodging groove 13 is provided with the copper foil on the surface, and the lower extreme overlap joint in the copper foil of pin 6 of two non-connecting resistances 3.
The matrix isolator of example two, see fig. 5: the shape of bottom plate is the rectangle, a plurality of metal connection parts 7 that single isolator corresponds, central metal connection region 8, locating hole groove 11, the groove 13 is dodged to the pin, resistance location structure combination forms a processing unit, be provided with a plurality of processing units of arranging according to the design rectangle on the bottom plate 2, single cylinder 1 of taking the lid that has intracavity component 5 is positioned the corresponding locating hole groove 11 on the processing unit that corresponds one by one, the pin that the lower extreme of pin 6 is located the corresponding position dodges the groove 13, resistance 3 is positioned resistance location structure, specifically be the PCB board on the bottom plate 1 of rectangle, the isolator of matrix type is arranged on the rectangle PCB board, satisfy the demand of various types, realize the multiband use, make the isolator in the whole equipment can concentrate and arrange, a large amount of spaces of equipment have been practiced thrift.
The monomer isolator of the third embodiment, see fig. 6: resistance 3 sets up on bottom plate 2, pin 6 corresponding connecting resistance 3 runs through the corresponding groove 4 of dodging bend down and is connected to resistance 3, pin 6 of non-connecting resistance 3 runs through the corresponding groove 4 of dodging and bends down, its lower extreme is located the pin of bottom plate 2 corresponding position and dodges groove 13, the groove of pin dodging groove 13 is provided with the copper foil on the surface, the lower extreme overlap joint in the copper foil of pin 6 of two non-connecting resistances, resistance 3's outer end is provided with the port 14 that is used for detecting the decay.
The matrix isolator of example three, see fig. 7: the shape of bottom plate is the rectangle, a plurality of metal connection parts 7 that single isolator corresponds, central metal connection region 8, locating hole groove 11, the groove 13 is dodged to the pin, resistance location structure combination forms a processing unit, be provided with a plurality of processing units of arranging according to the design rectangle on the bottom plate 2, single cylinder 1 of taking the lid that has intracavity component 5 is positioned the corresponding locating hole groove 11 on the processing unit that corresponds one by one, the pin that the lower extreme of pin 6 is located the corresponding position dodges the groove 13, resistance 3 is positioned resistance location structure, specifically be the PCB board on the bottom plate 2 of rectangle, the isolator of matrix type is arranged on the rectangle PCB board, satisfy the demand of various types, realize the multiband use, make the isolator in the whole equipment can concentrate and arrange, a large amount of spaces of equipment have been practiced thrift.
The monolithic isolator of example four, see fig. 8: resistance 3 sets up on bottom plate 2, pin 6 that corresponds connecting resistance 3 runs through the corresponding groove 4 of dodging bend down after being connected to resistance 3, pin 6 of non-connecting resistance 3 runs through the corresponding groove 4 of dodging and bends down, the pin that its lower extreme is located bottom plate 2 and corresponds the position dodges groove 13, the groove that the groove 13 was dodged to the pin is provided with the copper foil on the surface, the lower extreme overlap joint in the copper foil of pin 6 of two non-connecting resistances, still be provided with connector 15 on bottom plate 2, connector 15 is direct to be connected with the outside, need not to connect external connector through complicated circuit, the space of equipment has been practiced thrift.
The matrix isolator of example four, see fig. 9: the multi-functional multi-frequency isolator comprises a plurality of metal connecting parts 7 corresponding to a single isolator, a central metal connecting area 8, a positioning hole groove 11, a pin avoiding groove 13, a resistance positioning structure and a connector connecting structure which are combined to form a processing unit, a plurality of processing units arranged according to a designed rectangle are arranged on a bottom plate 2, the single cylinder 1 with a cover and provided with an intracavity element 5 is positioned in the corresponding positioning hole groove 11 on the corresponding processing unit one by one, the lower end of the pin 6 is positioned in the pin avoiding groove 13 at the corresponding position, a resistor 3 is positioned in the resistance positioning structure, the connector 15 is connected to the connector connecting structure, a PCB is specifically arranged on the rectangular bottom plate 2, matrix type isolator arrangement is carried out on the rectangular PCB, various requirements are met, multi-frequency band use is realized, isolators in the whole equipment can be arranged in a centralized mode, and a large amount of space of the equipment is saved.
The monolithic isolator of embodiment five, see fig. 10: the resistor 3 is arranged on the bottom plate 1, the pin 6 corresponding to the connecting resistor 3 penetrates through the corresponding avoiding groove 4 and then is connected to the resistor 3, the pin 6 of the non-connecting resistor penetrates through the corresponding avoiding groove 3 and then is arranged in an outward expanding mode, and the bottom plate 1 is rectangular.
Matrix isolator of example five, see fig. 11: the shape of bottom plate is the rectangle, a plurality of metal connection parts 7 that single isolator corresponds, central metal connection area 8, locating hole groove 11, resistance location structure combination forms a processing unit, be provided with a plurality of processing units of arranging according to the design rectangle on the bottom plate 2, single area that has intracavity component 5 covers cylinder 1 and is positioned the corresponding locating hole groove 11 on the processing unit that corresponds one by one, resistance 3 is positioned in resistance location structure, specifically be the PCB board on the bottom plate 2 of rectangle, the isolator of matrix is arranged on rectangle PCB board, satisfy the demand of all kinds, realize the multifrequency section and use, make the isolator in the whole equipment can concentrate and arrange, a large amount of spaces of equipment have been practiced thrift.
The monolithic isolator of specific example six, see fig. 12: the resistor 3 is arranged on the bottom plate 1, the pins 6 corresponding to the connecting resistors 3 penetrate through the corresponding avoiding grooves 4 and then are connected to the resistor 3, the pins 6 of the non-connecting resistors penetrate through the corresponding avoiding grooves 3 and then are arranged in an outward expanding mode, the bottom plate 1 is rectangular, the connector mounting plate 16 is arranged on the bottom plate 1, the connector mounting plate 16 is perpendicular to the upper end face of the bottom plate 1, and the connector 15 is fixedly arranged on one side of the connector mounting plate 16.
The working principle is as follows: the external circuit does not need to be placed below the isolator through a circuit board, the isolator can be arranged at any position in the whole equipment, at least one of the metal connecting parts 7 of the bottom plate 2 and the central metal connecting area 8 can be connected with the external circuit through soldering tin to ensure grounding, the full grounding performance of the isolator and the external circuit can be ensured, the normal use of the isolator is further ensured, the position of the isolator can be reasonably arranged according to actual requirements by the equipment using the isolator, and great convenience is provided for the assembly of complete equipment.
The detailed description of the embodiments of the present invention is provided above, but the present invention is only the preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the invention as claimed should be covered by this patent.