CN111009736A

CN111009736A - Equal phase connecting device

Info

Publication number: CN111009736A
Application number: CN201911380807.1A
Authority: CN
Inventors: 张兰; 何亚平; 杨甲斌; 邢翠红
Original assignee: Xi'an Leihang Electronic Information Technology Co ltd
Current assignee: Xi'an Leihang Electronic Information Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-14

Abstract

The invention provides an equal phase connection device, which solves the problem of equal phase connection between unequal intervals and equal intervals in a high-frequency range. The device comprises a radiation plate, a radio frequency cable plate, a back plate, a first connector, a second connector, an adapter and a third connector; the radiation plate is provided with radiation mounting holes, the radiation mounting holes are irregularly arranged, and the first connector is mounted in the radiation mounting holes; the radio frequency cable board is formed by sequentially splicing a plurality of sub-arrays, and a plurality of connector mounting holes are formed in the sub-arrays; the second connector is arranged in the connector mounting hole, and the first connector and the second connector are connected through the adapter; the upper end surface of the back plate is provided with a plurality of array grid plates, the back plate is provided with a plurality of grid holes which are regularly arranged, the grid holes penetrate through the array grid plates, and the third connector is arranged in the grid holes and is connected with the second connector through a flexible cable; and the lower end face of each subarray is provided with a support column for supporting the radio frequency cable plate.

Description

Equal phase connecting device

Technical Field

The invention relates to a connecting device, in particular to an equal phase connecting device.

Background

Since the advent of radar, radar technology has advanced at a high rate, and active phased array radar has become the mainstream in radar development. Active phased array radar technology has been widely adopted so far for various ground defense, ship defense, missile guidance, gun position reconnaissance, airborne fire control, target range measurement, and the like. No matter what kind of use's active phased array radar, all need set up few dozens, many then thousands of T/R assemblies, T/R assembly accomplishes functions such as receiving task, transmission task and antenna beam electricity scanning, and the performance of T/R assembly has directly decided each index of radar complete machine, and it is visible that array element and TR assembly of active phased array antenna are active phased array antenna core component, therefore antenna structure configuration depends on the corresponding position relation of array element and T/R assembly at first.

The internal structure of the existing phased array antenna comprises an equidistant array structure, an area concentration array structure, an integral concentration array structure, a separation array structure, an expansion array structure, a lamination array structure and the like. The TR components of the equidistant array structure are distributed in arrangement, so that the integration of rear-end equipment is not facilitated, and the equidistant array structure is suitable for a low-frequency band or high-frequency band large-spacing antenna structure; the structure of the area concentration array is suitable for the antenna with the array unit spacing larger than the width and thickness of the TR component, and the positions of the array unit spacing and the antenna are not in one-to-one correspondence, so that the design is complex, and the telecommunication loss is increased; the integral centralized array and the separated array structure usually need longer cables to realize interconnection, and the telecommunication loss is very large; the extended array structure is mainly used for the condition that the size of the TR component is larger than the distance between array units, and the TR component is suitable for high-frequency-band and small-caliber antennas above an X wave band in a multi-channel mode; the stacked array structure adopts a new generation of chip structure, and requires a high-density integration technology and a miniaturized multifunctional special chip, a high-performance high-reliability radio frequency circuit and a control circuit as technical supports, and the cost is too high.

Under most circumstances, array element and T/R subassembly are not the one-to-one, and both can not directly interconnect, must increase the transitional coupling layer, in traditional microwave system, because signal channel is many, high frequency transmission requires highly, high frequency signal transmission between each functional module relies on rigid cable and high frequency connector etc. almost completely, make its structure bulky, the design is complicated, and present transitional coupling layer is mostly cable lug connection, perhaps do simple and easy structural processing etc. can 'T be fine realize not equidistant to equidistant phase place's connection requirement in the high frequency band.

Disclosure of Invention

The invention aims to solve the problem of equal-phase connection between unequal intervals and equal intervals in a high-frequency range, and provides an equal-phase connection device which is used for realizing interconnection between a phased array antenna array surface and a component.

In order to realize the purpose, the technical scheme adopted by the invention is as follows:

an equal phase connecting device comprises a radiation plate, a radio frequency cable plate, a back plate, a first connector, a second connector, an adapter and a third connector; the radiation plate is provided with a plurality of through radiation mounting holes which are irregularly arranged, and the first connector is mounted in the radiation mounting holes; the radio frequency cable plate is positioned below the radiation plate and is formed by sequentially splicing a plurality of sub-arrays, and a plurality of connector mounting holes are formed in the sub-arrays; the second connector is arranged in the connector mounting hole, and the first connector and the second connector are connected through the adapter; the back plate is positioned below the radio frequency cable plate, a plurality of array grid plate plates are arranged on the upper end surface of the back plate, a plurality of grid holes which are regularly distributed are arranged on the back plate, the grid holes penetrate through the array grid plate plates, and the third connector is arranged in the grid holes and is connected with the second connector through a flexible cable; the lower end face of each subarray is provided with a support column for supporting the radio frequency cable plate, and the support columns are used for winding the flexible cables to achieve equidistant equal-phase connection of the second connector and the third connector.

Furthermore, a plurality of wire passing holes are formed in the subarray and used for winding the flexible cable.

Furthermore, a supporting boss is arranged on the subarray and used for supporting the radiation plate.

Furthermore, a connector mounting hole is formed in the support boss and used for mounting a second connector.

Further, the first connector comprises a first contact pin, a first insulator, a first shell, a first lug and a first sleeve; first casing passes through first hangers and installs on the radiation board, first sleeve setting is in first casing, first contact pin sets up in first sleeve, first insulator sets up between first contact pin and first sleeve, realizes the insulation of first contact pin.

Further, the second connector comprises a second sleeve, a second contact pin, a second insulator, a second shell, a second spring, a nut and a second snap ring; the second sleeve is arranged in the connector mounting hole, the second shell is arranged in the second sleeve, the second contact pin is arranged in the second shell, the second insulator is arranged between the second contact pin and the second shell to realize the insulation of the second contact pin, the second spring is sleeved on the second shell, one end of the second spring is limited by a step of the second sleeve, the other end of the second spring is limited axially by a second snap ring sleeved on the second shell, the nut is sleeved on the second shell, an annular boss is arranged on the inner side of the nut, and the annular boss is positioned on one side of the second shell to limit the second shell axially; and meanwhile, the nut is positioned in the second sleeve and is in threaded connection with the second sleeve, and the second clamping ring is axially limited.

Furthermore, the adapter comprises an adapter shell, an adapter insulator, an adapter snap ring and an adapter socket; the adapter socket is arranged in the adapter shell, and the adapter insulator is arranged between the adapter socket and the adapter shell to realize the insulation of the adapter socket; the switching snap ring is installed on the switching shell and is respectively matched with the first connector and the second connector, so that the axial limiting of the first connector and the second connector is realized.

Further, the third connector comprises a third contact pin, a third insulator, a third shell, a third spring and a flange; the third contact pin sets up in the third casing, the third insulator sets up between third contact pin and third casing, realizes the insulation of third contact pin, third spring suit is on the third casing, and the one end of third spring is spacing through setting up spacing boss on the third casing, and it is spacing that the other end passes through the flange, the flange passes through the connecting piece setting on the backplate.

Furthermore, the first insulator, the second insulator and the third insulator are all made of polytetrafluoroethylene.

Further, the radiation plate and the back plate are both aluminum plates.

Compared with the prior art, the invention has the following advantages:

1. the radiation plate of the equiphase connection device is provided with a plurality of irregularly arranged radiation mounting holes, the back plate is provided with a plurality of regularly arranged grid bar holes, the radio frequency cable plate is formed by splicing a plurality of sub-arrays, the lower end face of each sub-array is provided with a support column, and the second connector and the third connector wind the flexible cable on the support column through the flexible cable, so that the flexible cable is connected with the second connector and the third connector at equal intervals, and the requirement of the equiphase connection from unequal intervals to equal intervals is met under the irregular interconnection technology.

2. The radio frequency cable plate of the equiphase connecting device adopts a plate-type strip block structure design, and is convenient to process, debug and install.

3. The first connector, the second connector and the adapter are arranged between the back plate and the radiation plate of the equal phase connection device, the first connector, the second connector and the adapter are floating blind-mate connector joints, the floating blind-mate connector joints meet the blind-mate precision requirement, the problem of interconnection reliability caused by errors is solved, and reliable connection is realized.

4. The equiphase connection device has the characteristics of compact and reasonable layout, high integration level, reliable structure, light weight, high precision, good rigidity, good maintainability, quick heat dissipation and the like.

5. The equiphase connection device not only meets the integral bearing capacity and plane rigidity of the antenna, but also reduces the weight on the premise of meeting the requirements of the quality and the environment of the radar antenna.

Drawings

Fig. 1 is a schematic structural view of an equiphase connection apparatus of the present invention (without a first connector, a second connector, an adaptor, and a third connector mounted);

FIG. 2 is a first schematic structural diagram (omitting the radiation plate) of the equiphase connection device of the present invention;

FIG. 3 is a second schematic structural view of the equiphase connecting device of the present invention (omitting the radiation plate);

FIG. 4 is a schematic view of the installation of the first connector, the second connector, the adapter and the third connector of the present invention;

FIG. 5 is a schematic view of a first connector according to the present invention;

FIG. 6 is a schematic view of a second connector according to the present invention;

FIG. 7 is a schematic view of a third connector according to the present invention;

fig. 8 is a schematic structural diagram of the adaptor of the present invention.

Reference numerals: 1-radiating plate, 2-radio frequency cable plate, 3-back plate, 4-first connector, 5-second connector, 6-adaptor, 7-third connector, 8-support column, 11-radiating mounting hole, 21-subarray, 22-connector mounting hole, 23-wire passing hole, 24-support boss, 31-array grid plate, 32-grid hole, 41-first pin, 42-first insulator, 43-first shell, 44-first lug, 45-first sleeve, 51-second sleeve, 52-second pin, 53-second insulator, 54-second shell, 55-second spring, 56-nut, 57-second snap ring, 561-annular boss, 61-adaptor shell, 62-switching insulator, 63-switching snap ring, 64-switching socket, 71-third pin, 72-third insulator, 73-third shell, 74-third spring, 75-flange and 731-limiting boss.

Detailed Description

The technical method of the invention is described in detail with reference to the accompanying drawings and specific embodiments.

The invention provides an equiphase connecting device for a high-integration radar antenna, wherein a radio frequency cable plate adopts a plate type strip block structure, and one side of a radiation unit is integrally processed by adopting an aluminum plate in a block mode, then spliced and molded and connected with the radiation unit; meanwhile, one side of the back plate is integrally processed by aluminum plates in a 'splitting' manner and then is spliced and formed and connected with the back plate; after splicing and forming, a space is erected between the two through the supporting column, the flexible cable and the floating blind-plug connector joint are adopted to meet the requirement of equal phase from unequal interval to equal interval under irregular interconnection, and the phase connecting device has the characteristics of compact and reasonable layout, high integration level, reliable structure, light weight, high precision, good rigidity, good maintainability, fast heat dissipation and the like.

As shown in fig. 1 to 8, the present invention provides an equal phase connection device, which includes a radiation plate 1, a radio frequency cable plate 2, a back plate 3, a first connector 4, a second connector 5, an adapter 6, and a third connector 7.

The radiation plate 1 is provided with a plurality of through radiation mounting holes 11, the radiation mounting holes 11 are irregularly arranged, and the first connector 4 is mounted in the radiation mounting holes 11; the radio frequency cable plate 2 is positioned below the radiation plate 1 and is formed by sequentially splicing a plurality of sub-arrays 21, and a plurality of connector mounting holes 22 are formed in the sub-arrays 21; the second connector 5 is mounted in the connector mounting hole 22, and the first connector 4 and the second connector 5 are connected by the adaptor 6; the back plate 3 is positioned below the radio frequency cable plate 2, a plurality of array grid plate plates 31 are arranged on the upper end surface of the back plate 3, a plurality of grid holes 32 which are regularly arranged are arranged on the back plate 3, the grid holes 32 penetrate through the array grid plate plates 31, the third connector 7 is installed in the grid holes 32, and the third connector 7 is connected with the second connector 5 through a flexible cable; the lower end face of each subarray 21 is provided with a supporting column 8 for supporting the radio frequency cable plate 2, and the supporting columns 8 are used for winding flexible cables to achieve equidistant equal-phase connection of the second connectors 5 and the third connectors 7. The support column 8 can serve as a positioning function and a top column, the strength of the radio frequency cable plate 2 is improved, and the connection reliability is improved. The sub-array 21 is provided with a plurality of wire passing holes 23 for winding the flexible cable, so that the flexible cable can be wound more conveniently. The sub-array 21 is provided with a supporting boss 24, so that a certain space is reserved between the radiation plate 1 and the radio frequency cable plate 2, winding of a flexible cable is facilitated, and meanwhile, the supporting boss 24 is provided with a connector mounting hole 22, and more second connectors 5 can be mounted.

A T/R component, a cooling system, a one-sixth power divider, a one-sixteenth power divider, and the like (the T/R component, the cooling system, the one-sixth power divider, and the one-sixteenth power divider are devices in an active phased array radar, and are not shown in the figure) are arranged on the lower side of the back plate 3, and a third connector 7 on the back plate 3 is connected with the regularly arranged T/R components; the back plate 3 and the radio frequency cable plate 2 are formed by processing aluminum plates at one time, the periphery of the lower side of the back plate 3 is provided with a cooling system, the problem of system heat dissipation can be effectively solved, the back plate 3 is provided with grid holes which are regularly arranged, the radiation plate is provided with radiation mounting holes which are irregularly arranged, and irregular interconnection is formed between the radiation plate and the radiation plate, so that electric transmission is realized by adding the radio frequency cable plate 2 between the radiation plate 1 and the back plate 3, and the requirements of unequal spacing to equal spacing and equal phase are realized by adopting flexible cables and floating blind plug connector joints under irregular interconnection.

As shown in fig. 5, the first connector 4 includes a first pin 41, a first insulator 42, a first housing 43, a first lug 44, and a first sleeve 45; the first housing 43 is mounted on the radiation plate 1 through the first suspension lug 44, the first sleeve 45 is disposed in the first housing 43, the first pin 41 is disposed in the first sleeve 45, and the first insulator 42 is disposed between the first pin 41 and the first sleeve 45, so as to insulate the first pin 41.

As shown in fig. 6, the second connector 5 includes a second sleeve 51, a second pin 52, a second insulator 53, a second housing 54, a second spring 55, a nut 56, and a second snap ring 57; the second sleeve 51 is arranged in the connector mounting hole 22, the second shell 54 is arranged in the second sleeve 51, the second pin 52 is arranged in the second shell 54, the second insulator 53 is arranged between the second pin 52 and the second shell 54 to realize insulation of the second pin 52, the second spring 55 is sleeved on the second shell 54, one end of the second spring is limited by a step of the second sleeve 51, the other end of the second spring is limited axially by a second snap ring 57 sleeved on the second shell 54, the nut 56 is sleeved on the second shell 54, an annular boss 561 is arranged on the inner side of the second spring, and the annular boss 561 is positioned on one side of the second shell 54 to limit the interior of the second shell 54 axially; meanwhile, the nut 56 is located in the second sleeve 51, and is in threaded connection with the second sleeve 51, and is used for axially limiting the second snap ring 57.

As shown in fig. 8, the adapter 6 includes an adapter housing 61, an adapter insulator 62, an adapter snap ring 63, and an adapter socket 64; the adapter socket 64 is arranged in the adapter housing 61, and the adapter insulator 62 is arranged between the adapter socket 64 and the adapter housing 61, so that the adapter socket 64 is insulated; switching snap ring 63 installs on switching casing 61, cooperates with first connector 4, second connector 5 respectively, realizes that first connector 4, second connector 5's axial is spacing.

As shown in fig. 7, the third connector 7 includes a third pin 71, a third insulator 72, a third housing 73, a third spring 74, and a flange 75; the third pin 71 is arranged in the third housing 73, the third insulator 72 is arranged between the third pin 71 and the third housing 73, so that the insulation of the third pin 71 is realized, the third spring 74 is sleeved on the third housing 73, one end of the third spring 74 is limited by a limiting boss 731 arranged on the third housing 73, the other end of the third spring is limited by a flange 75, and the flange 75 is arranged on the back plate 3 through a connecting piece. The first insulator 42, the second insulator 53 and the third insulator 72 are all made of polytetrafluoroethylene, and the radiation plate 1 and the back plate 3 are all made of aluminum plates.

As shown in fig. 1 and 2, the radiation plate 1 is divided into four quadrants, one quadrant has 22 sub-arrays 21, and correspondingly to this, the radio frequency cable plate 2 is divided into four quadrants, one quadrant has 22 sub-arrays 21, and the T/R assemblies are regularly arranged, so the third connectors 7 connected to the T/R assemblies are regularly arranged, and the first connectors 4 on the radiation plate 1 are irregularly arranged, and the irregular interconnection between the two connectors is realized through the radio frequency cable plate 2.

When the equal phase connecting device is installed, the radiation plate 1 is formed by machining a hard aluminum plate at one time, is fixed on the surrounding frame of the active phased array radar by adopting a positioning screw and a positioning pin, and the back plate 3 is formed by machining a hard aluminum plate at one time and is fixed on the surrounding frame of the active phased array radar by adopting a positioning screw and a positioning pin.

The radio frequency cable plate 2 is integrally formed by splicing and processing aluminum plates in blocks and is connected with a radiation unit (a radiation plate 1 and a first connector 4); meanwhile, the array grid plate 31 is integrally formed by splicing and connecting with the back plate 3 after being processed by aluminum plate strips, and a space is erected between the array grid plate and the back plate by arranging the support columns 8 after the array grid plate is formed by splicing, so that wiring is facilitated.

In the invention, the radio frequency cable plate 2 is formed by processing an aluminum plate, and in the design process, the structure is designed to be in a block design, and the material is a soft aluminum material, so that the structure has the following advantages: 1. partitioning according to subarrays, simplifying the wiring design of the array surface and improving the assembly efficiency; 2. the blocks are partitioned according to the subarrays 21, so that the installation, debugging and maintenance are convenient; 3. the blocks are divided according to the subarray 21, so that the processing difficulty is small and the cost is low; 4. the 'soft aluminum' material is selected, the processing deformation is small, and the interchangeability of multiple paths is improved.

In the invention, the array grid plate 31 is formed by processing an aluminum plate, and in the design process, the structure is designed into a strip design, and the material is a hard aluminum material, so that the structure has the following advantages: 1. the wiring design of the array surface is simplified, and the assembly efficiency is improved; 2. the installation, debugging and maintenance are convenient; 3. the processing difficulty is small, and the cost is low; 4. the problem of poor rigidity is effectively solved by selecting a hard aluminum material.

The equiphase connection device can be provided with nearly 3000 cables, and the use frequency is 14-18 GHz. The radio frequency cable plate 2 of the equiphase connecting device has wider use frequency band in the aspect of electrical property, the used frequency reaches 18GHz, and most of the existing radar working frequency bands are in X wave bands: the requirement of radar electronic warfare and multifunctional integration on the active subarray 21 broadband can not be met below 8-12 GHz, and the connecting device can meet the requirement.

In the traditional phased array antenna structure design, as the number of signal channels is large, the requirement on high-frequency transmission is high, and the high-frequency signal transmission among all the functional modules almost completely depends on rigid cables, high-frequency connectors and the like, so that the phased array antenna has a complex structure and large volume and occupies more space size.

The equal-phase connecting device is high in use frequency, the radio frequency interfaces at two ends of the equal-phase connecting device are provided with floating blind-mate connectors, aluminum materials are adopted for reducing weight, the aluminum materials are easy to deform in the machining process to cause the height of the connectors to be inconsistent, the connectors cannot be connected due to the fact that the connectors are not installed in place, meanwhile, the positioning requirement of the connectors between boards is high, multiple groups of connectors are difficult to align and insert when used, and inner conductors are easy to damage; the invention considers that the floating is increased at the two end joints, thereby avoiding the problem of the improper assembly of the radiator caused by the flatness problem, effectively ensuring the difficult insertion of the product in multiple paths due to misoperation and processing error, and providing protection for the reliability of the insertion.

Claims

1. An isophase connection device, characterized in that: it comprises a radiation plate (1), a radio frequency cable plate (2), a backplane (3), a first connector (4), a second connector (5), a switch connector (6) and a third connector (7);

The radiation plate (1) is provided with a plurality of through radiation installation holes (11), and the plurality of radiation installation holes (11) are irregularly arranged, and the first connector (4) is installed in the radiation installation holes (11);

The radio frequency cable plate (2) is located below the radiation plate (1), and is formed by splicing a plurality of sub-arrays (21) in sequence, and the sub-arrays (21) are provided with a plurality of connector mounting holes (22); the The second connector (5) is installed in the connector mounting hole (22), and the first connector (4) and the second connector (5) are connected by an adapter (6);

The backplane (3) is located below the radio frequency cable plate (2), a plurality of grid bars (31) are arranged on the upper end surface thereof, and a plurality of regularly arranged grid bars are arranged on the backplane (3). The grid hole (32), and the grid hole (32) penetrates through the grid grid plate (31), the third connector (7) is installed in the grid hole (32), and is connected to the second connector through a flexible cable The connector (5) is connected;

The lower end surface of each sub-array (21) is provided with a support column (8) for supporting the radio frequency cable board (2), the support column (8) is used for winding the flexible cable, and realizes the second connector (5) and Equal spacing and equal phase connection of the third connector (7).

2 . The equal-phase connection device according to claim 1 , wherein: the sub-array ( 21 ) is provided with a plurality of wire holes ( 23 ) for winding flexible cables. 3 .

3 . The equal-phase connection device according to claim 2 , wherein the sub-array ( 21 ) is provided with a support boss ( 24 ) for supporting the radiation plate ( 1 ). 4 .

4. The equal-phase connection device according to claim 3, characterized in that: the support boss (24) is provided with a connector mounting hole (22) for mounting the second connector (5).

5. The equal-phase connection device according to any one of claims 1 to 4, wherein the first connector (4) comprises a first pin (41), a first insulator (42), a first shell a body (43), a first hanging lug (44) and a first sleeve (45);

The first casing (43) is mounted on the radiation plate (1) through the first hanging lugs (44), the first sleeve (45) is arranged in the first casing (43), and the first The pin (41) is arranged in the first sleeve (45), and the first insulator (42) is arranged between the first pin (41) and the first sleeve (45), so as to realize the first pin (45). 41) insulation.

6. The equal-phase connection device according to claim 5, wherein the second connector (5) comprises a second sleeve (51), a second pin (52), and a second insulator (53) , a second housing (54), a second spring (55), a nut (56) and a second snap ring (57);

The second sleeve (51) is arranged in the connector mounting hole (22), the second housing (54) is arranged in the second sleeve (51), and the second pin (52) is arranged In the second housing (54), the second insulator (53) is arranged between the second pin (52) and the second housing (54) to achieve insulation of the second pin (52), so The second spring (55) is sleeved on the second casing (54), one end is limited by the step of the second sleeve (51), and the other end is through the second snap ring sleeved on the second casing (54). (57) Axial limit;

The nut (56) is sleeved on the second housing (54), and an annular boss (561) is provided on the inner side, the annular boss (561) is located on one side of the second housing (54), and is opposite to the second Axial limiting is performed in the housing (54); at the same time, the nut (56) is located in the second sleeve (51) and is threadedly connected with the second sleeve (51), and the second snap ring (57) is threaded Axial limit.

7 . The equal-phase connection device according to claim 6 , wherein the adapter ( 6 ) comprises an adapter housing ( 61 ), an adapter insulator ( 62 ), an adapter snap ring ( 63 ) and Adapter socket (64);

The adapter socket (64) is arranged in the adapter shell (61), and the adapter insulator (62) is arranged between the adapter socket (64) and the adapter shell (61) to realize the adapter socket (64) insulation; the adapter snap ring (63) is installed on the adapter housing (61), and is respectively matched with the first connector (4, ) and the second connector (5) to realize the first connector (4), the axial limit of the second connector (5).

8. The equal-phase connection device according to claim 7, wherein the third connector (7) comprises a third pin (71), a third insulator (72), and a third housing (73) , the third spring (74) and the flange (75);

The third pin (71) is arranged in the third housing (73), and the third insulator (72) is arranged between the third pin (71) and the third housing (73), so as to realize the first Insulation of the three pins (71), the third spring (74) is sleeved on the third housing (73), and one end of the third spring (74) passes through the limiter provided on the third housing (73). The positioning boss (731) is limited in position, and the other end is limited by a flange (75), and the flange (75) is provided on the back plate (3) through a connecting piece.

9 . The equal-phase connection device according to claim 8 , wherein the first insulator ( 42 ), the second insulator ( 53 ) and the third insulator ( 72 ) are all polytetrafluoroethylene. 10 .

10 . The equal-phase connection device according to claim 9 , wherein the radiation plate ( 1 ) and the back plate ( 3 ) are both aluminum plates. 11 .