WO2009111924A1 - A coaxial connector - Google Patents

Abstract

A coaxial connector includes a coaxial connector housing, and a substrate is provided in said housing; said substrate has a signal input end and a signal output end, a blocking capacitance is connected between the signal input end and the signal output end of said substrate, and the signal input end and signal output end of said substrate connect with the input end and the output end of said coaxial connector respectively; the housing of said coaxial connector is provided with a hole, said substrate includes a feed circuit, the input end of said feed circuit electrically connects with the external power supply through the hole on the housingof said coaxial connector, and the output end of said feed circuit connects between said blocking capacitance and said coaxial connector to supply power to the next level active circuit; said feed circuit and said coaxial connector are grounded together.

Description

 Instruction manual coaxial connector

 Technical field

 [1] Electronics, communications, positioning and navigation, broadcast television and radar

 Background technique

 [2] In the fields of communication, navigation, etc., the antenna is often installed outdoors, and it is connected to the system through a coaxial cable. The antenna has two kinds of active antennas and passive antennas. In some applications, because the receiver may be far from the active antenna, the receiver's supply voltage to the active antenna is reduced, which affects the performance of the active antenna or exacerbates the attenuation of the electrical signal during transmission, or The difference between the height and the frequency of the radio signal is different between receiving and transmitting. It is often necessary to increase the gain of the received or transmitted signal of the existing system, such as increasing the gain by adding a first-stage low-noise amplifier, gain amplifier or active filter. It is inconvenient to install active devices such as amplifiers, especially for active antennas or active antennas that convert passive antennas. The feeding problem is a headache for field engineers. The existing method is to connect a feeder. To the active antenna end to feed the active antenna, this will bring a series of problems from the construction design, construction, scale and cost, such as the feeding voltage and signal power provided by the system can not reach the distance of the scene, The longest feeding distance of the system design is 200 meters, while the site is 300 meters away. The engineers on site are very The transformation of the system voltage or increase the signal gain.

 Disclosure of invention

 technical problem

 [3] Existing active antenna feeds require the use of additional feeders, so that the designed feed system does not easily meet the actual feed requirements.

 Technical solution

 [4] The embodiment of the present invention is implemented in this way, a coaxial connector,

The coaxial connector housing includes a substrate; the substrate has a signal input end and a signal output end, and a DC blocking capacitor is connected between the signal input end and the signal output end of the substrate. The signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided with a hole, and the substrate comprises a feeding circuit. An input end of the feeding circuit is electrically connected to an external power source through a hole in the coaxial connector housing, and an output end of the feeding circuit is connected to the DC blocking capacitor and an output end of the coaxial connector Feeding the next active circuit of the coaxial connector; the feed circuit sharing the coaxial connector

[5] Another object of an embodiment of the present invention is to provide a coaxial connector,

 The coaxial connector housing includes a substrate; the substrate has a signal input end and a signal output end, and a DC blocking capacitor is connected between the signal input end and the signal output end of the substrate. The signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided with a hole, and the substrate comprises a feeding circuit. An input end of the feeding circuit is connected to an input end of the coaxial connector, and an output end of the feeding circuit passes through a hole in the coaxial connector housing to a lower stage of the coaxial connector The source circuit feeds; the feed circuit is co-located with the coaxial connector.

 [6] Another object of an embodiment of the present invention is to provide a coaxial connector,

 The coaxial connector housing includes a substrate; the substrate has a signal input end and a signal output end, and an active circuit is connected between the signal input end and the signal output end of the substrate The signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided with a hole, and the substrate comprises a feed circuit. An input end of the feeding circuit is electrically connected to an external power source through a hole in the coaxial connector housing, and an output end of the feeding circuit is electrically connected to the active circuit to feed the active circuit The feed circuit is co-located with the coaxial connector.

 [7] Another object of an embodiment of the present invention is to provide a coaxial connector,

 The coaxial connector housing includes a substrate; the substrate has a signal input end and a signal output end, and an active circuit is connected between the signal input end and the signal output end of the substrate The signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the substrate includes a feed circuit, and the external power source passes through the input end of the coaxial connector Electrically connecting with an input end of the feed circuit, an output end of the feed circuit is electrically connected to the active circuit, and feeding the active circuit; the feed circuit and the coaxial connector Common ground.

Beneficial effect [8] 1

 Easy to use and cost-effective, by sharing the cable signal line, no additional feeder is needed to feed the next active circuit.

 [9] 2, small size, convenient connection, can easily add the required active circuit function to a system.

 [10] 3

 It is convenient to increase the gain of passive or active antennas outdoors. A coaxial connector type feeder equipped with an active circuit such as a low noise amplifier can be directly connected to the interface of the coaxial cable of the antenna, and the feed voltage can be obtained through the signal line of the front coaxial cable without additional Add feeders.

[11] 4. Applicable to various communication systems, such as television broadcasting systems, satellite transceiver systems,

 Transceiver systems such as GPS.

 DRAWINGS

 1 is a schematic circuit diagram of a built-in substrate of a coaxial connector according to a first embodiment of the present invention.

[13] Figure 2 is a schematic diagram of an implementation of the feed circuit of Figure 1.

FIG. 3 is a schematic structural view of a housing of a coaxial connector according to a first embodiment of the present invention.

4 is a schematic external view of a curved mask of a coaxial connector according to a first embodiment of the present invention.

FIG. 5 is a schematic view showing the outline of a grounded metal gasket according to a first embodiment of the present invention.

6 is a schematic view showing the appearance of a coaxial connector assembled with components according to a first embodiment of the present invention.

FIG. 7 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a third embodiment of the present invention.

FIG. 8 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a fourth embodiment of the present invention.

9 is a circuit diagram showing the structure of a built-in substrate of a coaxial connector with a voltage dividing circuit according to a fifth embodiment of the present invention.

 FIG. 10 is a schematic diagram showing the combined structure of a coaxial connector according to a fifth embodiment of the present invention.

FIG. 11 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a sixth embodiment of the present invention.

FIG. 12 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a seventh embodiment of the present invention.

FIG. 13 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to an eighth embodiment of the present invention.

FIG. 14 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a ninth embodiment of the present invention.

FIG. 15 is a cross-sectional structural diagram of a coaxial connector according to a ninth embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION [27]

 Embodiments of the invention

 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

 [29] In the embodiment of the present invention, a substrate including a feeding circuit is built in the coaxial connector, and an external power supply voltage is directly applied to the feeding circuit, or an external power supply voltage is applied to the input signal line of the coaxial connector. The feed circuit, the feed circuit can thus feed the active circuit inside the substrate and the next active circuit of the coaxial connector.

 1 shows a circuit structure of a built-in substrate of a coaxial connector according to a first embodiment of the present invention. The substrate 11 is a two-layer substrate whose surface layer is a circuit layer, and the bottom layer is a common ground layer of a metal material, which functions as a common grounding end, and the bottom layer is in contact with the housing of the coaxial connector (common ground). On the surface layer of the substrate 11, the signal input end 121 of the substrate 11 is connected to one end of the (radio frequency) DC blocking capacitor 15 via the signal microstrip line 14, and the signal of the other end of the DC blocking capacitor 15 via the signal microstrip line 14 and the substrate 11 The output terminal 131 is connected; the substrate 11 further includes a feeding circuit 16, which has a high resistance to the radio frequency signal to prevent leakage of the radio frequency signal, and the DC voltage signal can pass. The external power supply voltage is applied to the feed input terminal 17 of the feed circuit 16, and the feed output terminal 18 of the feed circuit 16 is connected to the signal output terminal 131, and the signal output terminal of the coaxial connector is passed to the next stage. (External) active circuit feed. The substrate 11 is built in the housing of the coaxial connector, and a single layer or a plurality of substrates may be used. Specifically, the grounding end of the control substrate 11 is kept in common with the housing of the coaxial connector.

2 shows an implementation of the feed circuit 16 of FIG. 1. Referring to FIG. 2, the feed circuit 161 is a signal high impedance microstrip line printed on the substrate 11, provided by an external power supply. The voltage is applied to the feed input 17 of the feed circuit 161, and the feed output 18 of the feed circuit is coupled to the signal output 131. When the signal frequency is not high, such as less than 1 GHz, it is also possible to replace the signal high-impedance microstrip line with a high-impedance streamline, or to select other signal high-impedance networks depending on the application. In addition, a core-through capacitor can be connected between the feed input end 17 and the housing of the coaxial connector to better prevent leakage of the RF signal. The DC blocking capacitor 15 can select the capacitance according to the frequency band of the signal. The DC blocking capacitor 15 in FIG. 2 is a chip capacitor. 3 is a schematic structural view of a housing of a coaxial connector according to a first embodiment of the present invention, the coaxial connector being a modified SMA type coaxial connector. 1 and 2, the housing 19 and the two signal interface terminals of the coaxial connector are integrally formed, and the two signal terminals 12 and 13 are respectively connected to the external signal interface terminals of the coaxial connector. . The coaxial connector in Fig. 3 is a bidirectional connector, and the input terminal and the output terminal are interchangeable, but considering that the circuit on the substrate 11 is not a bidirectional circuit structure, the signal input terminal and the output terminal are not interchangeable, for convenience of explanation and In the embodiment of the present invention, the male terminal of the coaxial connector is selected as the signal input terminal 12 (of course, there may be other setting manners), and the signal input end 121 and the signal output end 131 of the substrate 11 are respectively soldered. On the internal signal terminals 12, 13 of the coaxial connector, the common ground terminal of the substrate 11 is in contact with the metal substrate 111 in the housing of the coaxial connector as the ground terminal of the feed circuit 16, that is, the feed The grounding end of the circuit 16 can be connected to the system through the metal substrate 111 and kept in common with the system. The feeding input terminal 17 of the feeding circuit 16 is connected to the external power source through the through-core capacitor 114. Of course, a coaxial can also be used. The connector of the connector replaces the core capacitor 114 and can also serve as a feed.

 4 is a schematic external view of a curved mask of a coaxial connector according to a first embodiment of the present invention. The straight edge of the arc mask 110 is hinged or hinged to the window of the coaxial connector housing shown in FIG. With other connections, the arc mask 110 can be opened. The arc mask 110 has a hole through which the through-core capacitor 114 can be mounted between the hole and the feed input end 17 of the feed circuit 16, and the external power supply voltage is passed through. A core capacitor 114 is applied to the feed circuit.

 [34] If you want to use a power supply directly (supply voltage) to feed the next active circuit, that is, the power supply is not shared with the system that needs to be fed, in order to ensure that the external power supply and the system remain in the same place, The grounding end of the power supply is also connected to the common grounding end of the bottom layer of the feeding circuit 16, for example, a metal grounding piece is disposed between the core-through capacitor 1 14 and the arc mask 110, and the grounding end of the external power source is coaxial. The metal grounding lugs on the arc mask 110 of the connector are connected to ensure that the external power source and the feed circuit 16 of the system have a common ground.

5 is a schematic external view of a grounded metal gasket according to a first embodiment of the present invention. 1 to 5, in the signal input terminal 121 and the signal output terminal 131 of the solder substrate 11, in order to ensure better grounding of the feed circuit 16 and the system, the substrate 11 is prevented from rising due to the cooling of the solder. The contact with the metal substrate 111 is not well maintained, on one side of the substrate 11, that is, with the signal input terminal 121 or the output of the substrate 11. A side of the end 131 is mounted with a grounded metal pad 119 between the substrate 11 and the metal substrate 111. Two metal pads can also be symmetrically mounted, but the position of the feeder is left, for example, in the feed. A slot is formed at the junction of the input terminal 17 to prevent the metal spacer 119 from coming into contact with the feed input terminal 17. Metal spacer 119 can be a beryllium copper. When the internal space of the coaxial connector is relatively large, the substrate 11 can also be fixed to the metal substrate 111 by screws.

 Fig. 6 is a perspective view showing the appearance of a coaxial connector in which the above components are assembled according to the first embodiment of the present invention. The coaxial connector feeding device can connect the DC voltage to the next active circuit outside the coaxial connector through the signal cable, for example, to the active antenna at the top of the building, without further Lead the DC power cable to the lower end of a few hundred meters.

 [37] Further, the coaxial connector may also be an N-type coaxial connector, a BNC type coaxial connector or other type of coaxial connector, the internal configuration of these connectors and the SMA of the first embodiment of the present invention. The construction of the coaxial connector is basically the same, except that the external connector and the external dimensions are different.

 Further, the coaxial connector provided by the first embodiment of the present invention may also be a metal shell type coaxial connector having coaxial connectors at both ends, for example, a coaxial joint is installed at both ends of an aluminum shell.

 [39] It should be understood that the above description only describes the configuration of the coaxial connector provided by the first embodiment of the present invention by way of an example. The internal structure of the coaxial connector may also be other forms, and the details are not specifically mentioned. .

 [40] The input terminal 121 of FIG. 1 is used as an output terminal, the output terminal 131 is used as an input terminal and is connected to the feed input terminal 17 of the feed circuit 16, and the feed output terminal 18 of the feed circuit 16 is directed to an external active circuit. The feeding structure, that is, the circuit structure of the built-in substrate of the coaxial connector provided by the second embodiment of the present invention, the outer casing structure of the coaxial connector is unchanged, and the first embodiment is paired with an embodiment, and the first embodiment is The coaxial connector is connected to the system output end of the room, and the connector of the second embodiment is installed at the interface end of the outdoor antenna, so that the outdoor antenna feeding can be realized by such pairing.

FIG. 7 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a third embodiment of the present invention. On a substrate 21, an active circuit 20 is included. The substrate 21 can be a two-layer substrate, the surface layer of which is a circuit layer, and the bottom layer of which is a metal layer that functions as a common ground. In the surface layer of the substrate 21, the signal input end 221 of the substrate 21 is connected to the input end of the active circuit 20 via a signal microstrip line, and the output end of the active circuit 20 can also be separated from a radio frequency via the signal microstrip line. One end of the DC capacitor 25 is connected, and the DC is blocked. The other end of the capacitor 25 is connected to the signal output terminal 231 of the substrate 21. Also included on the substrate is a feed circuit 26 that feeds the active circuit 20, which is powered by an external supply voltage through the feed input terminal 27.

 FIG. 8 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a fourth embodiment of the present invention. 7 and FIG. 8, the difference from the second embodiment is that it can feed the active circuit 20 built in the coaxial connector, and can also pass the signal output end of the coaxial connector to the next one. The active circuit of the stage (external) is fed, that is, the feed output terminal 281 of the feed circuit 26 feeds the active circuit 20, and the feed output terminal 282 is connected to the signal output terminal 231, and can be fed down to the next stage. (External) active circuit feed.

 [43] The active circuit 20 can be a low noise amplifier, a gain amplifier, an active filter, or other active circuit that is co-located with the coaxial connector.

 [44] If the active circuit 20 has its own input and output DC blocking capacitors, no additional DC capacitor 25 is needed. If the active circuit 20 has its own feeding circuit (signal high impedance circuit), then there is The feed circuit 26 fed by the source circuit 20 may be a conductive wire or a conductive microstrip line.

 Referring to the first embodiment, the substrate 21 is mounted on a housing of a modified SMA type coaxial connector, that is, a complete coaxial connector type feeder.

9 is a circuit diagram showing the structure of a built-in substrate of a coaxial connector with a voltage dividing circuit according to a fifth embodiment of the present invention. Based on the circuit structure of the third embodiment, a voltage dividing circuit is added. Referring to FIG. 8 and FIG. 9, the feed input terminal 27 of the feed circuit is used as the voltage input terminal of the voltage dividing circuit 218, and the voltage dividing circuit 218 has two feed output terminals, and a feed output terminal 281 is connected to the coaxial connector. The built-in active circuit 20 is fed; the other feed output terminal 282 is connected to the signal output terminal 231 of the substrate 21 via the high-impedance line 26, and can also be fed to the active circuit of the next stage (external), that is, two The voltages of the feed outputs 281, 282 can be set to be the same or different depending on the actual application. The voltage dividing circuit 218 can be selected from a general-purpose voltage dividing integrated circuit (I

 , DC-DC) Converter, Low Dropout Regulator (Low Drop Output Regulator, LDO)

) and other devices, you can easily get the required voltage. In practical applications, the active circuit of the next stage (external) is far from the feed circuit and may require different feed voltages. This voltage divider circuit can solve this problem well.

FIG. 10 is a schematic diagram showing the combined structure of a coaxial connector according to a fifth embodiment of the present invention. Mounting the substrate 21 In a housing 29 of a modified SMA coaxial connector, the signal input terminal 221 of the substrate 21 is coupled to the signal terminal 22 of the coaxial connector, and the signal output terminal 231 and the signal terminal 23 of the coaxial connector The construction principles of the housing 29, the arc mask 210, the core capacitor 214, the metal spacer 219, and the active circuit 20 are identical to those of the first embodiment, and will not be described.

 [48] The active circuit 20 can be a low noise amplifier, a gain amplifier, an active filter, or other active circuit.

 11 is a circuit structural diagram of a built-in substrate of a coaxial connector according to a sixth embodiment of the present invention. This differs from the second embodiment in that the voltage at the feed input 27 is not added through the outer casing of the coaxial connector, but from the signal line 221 of the previous stage. The signal and the feed voltage are transmitted to the signal input end 221 of the substrate 21 through the signal terminal 2 of the coaxial connector from the previous stage, and the signal is sent to the input end of the active circuit 20 via a DC blocking capacitor 251. The bias voltage from the signal line of the previous stage is fed through the feed input terminal 27 through the feed output terminal 281 of the feed circuit 26 to the active circuit 20. The output of the active circuit 20 is also coupled to the signal output 231 via a signal microstrip line and a DC blocking capacitor 25.

 FIG. 12 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to a seventh embodiment of the present invention. Referring to FIG. 112 and FIG. 12, the difference from the fifth embodiment is that the feed output end 282 of the feed circuit 26 is also connected to the signal output end 231, and can be fed to the active circuit of the next stage (external). Electricity.

 [51] The active circuit 20 can be a low noise amplifier, a gain amplifier, an active filter or other active circuit

FIG. 13 is a schematic diagram showing the circuit structure of a built-in substrate of a coaxial connector according to an eighth embodiment of the present invention. It differs from the sixth embodiment in that a voltage dividing circuit 218 is added, and the voltage dividing circuit 218 feeds the active circuit 20. The voltages of the two feed outputs 281, 282 of the feed circuit can be different, but the voltage at the feed input 27 is the same as the voltage at the feed output 282.

 14 is a schematic circuit diagram of a built-in substrate of a coaxial connector according to a ninth embodiment of the present invention. 13 and FIG. 14, the feed input terminal 27 is connected to the input terminal of the voltage dividing circuit 218 via a high impedance line 261, and the voltage dividing circuit 218 separates two voltages, wherein the feed output terminal 281 is directed to the active circuit 20. Feeding, another feed output 282 is coupled to signal output 231 via a high impedance line 262 to feed the active circuit to the next stage (outside).

15 is a cross-sectional structural view of a coaxial connector according to a ninth embodiment of the present invention. Referring to Figures 14 and 15, the substrate of the seventh embodiment is mounted in a housing 29 of a modified SMA coaxial connector. The signal input end 221 of the substrate is connected to the signal input end 22 of the coaxial connector, and the signal output end 231 of the substrate is connected to the signal output end 23 of the coaxial connector, which can be connected from the previous stage (coaxial connector The front end) obtains the power supply voltage, and the signal line through the casing of the coaxial connector is applied with a DC voltage to the feed input terminal 27 via the signal input terminal 221 on the substrate, and the feed circuit is shared with the coaxial connector. The configuration of the coaxial connector is substantially the same as that of the first and second embodiments. The difference is that the feed input end 27 does not need to be perforated from the outer casing to feed, but is fed through the signal line of the previous stage, so there is no hole in the arc mask 210.

[55] The coaxial connectors provided in the second to eighth embodiments may also be N-type coaxial connectors, BNC-type coaxial connectors or other types of coaxial connectors, and the internal structure of the connectors is The SMA type coaxial connectors of the embodiment have basically the same configuration except that the outer joints and the outer dimensions are different, and the housings of the coaxial connectors and the coaxial joints are integrally formed.

 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection of the invention.

 Industrial applicability

 [57]

 Sequence table free content

 [58]

Claims

Claim  1  a coaxial connector, comprising a coaxial connector housing, wherein the coaxial connector housing has a substrate; the substrate has a signal input end and a signal output end, and the signal input of the substrate A DC blocking capacitor is connected between the terminal and the signal output end, and the signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided with a a hole, the substrate includes a feeding circuit, and an input end of the feeding circuit is electrically connected to an external power source through a hole in the coaxial connector housing, and an output end of the feeding circuit is connected to the DC blocking Between the output of the coaxial connector and the output of the coaxial connector, the next active circuit of the coaxial connector is fed; the feed circuit is co-located with the coaxial connector.  2. The coaxial connector according to claim 1, wherein the coaxial connector is an SMA type coaxial connector, an N-type coaxial connector, a BNC type coaxial connector, or both ends Metal housing type coaxial connector with coaxial connector. 3  The coaxial connector according to claim 1, wherein a metal spacer is disposed between the substrate and the substrate in the coaxial connector housing.  4  The coaxial connector according to claim 1, wherein the feed circuit is a signal high impedance microstrip line, a high impedance erect stream line or a signal high resistance network.  5 a coaxial connector, comprising a coaxial connector housing, wherein the coaxial connector housing has a substrate; the substrate has a signal input end and a signal output end, and the signal input of the substrate A DC blocking capacitor is connected between the terminal and the signal output end, and the signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided with a a hole, the substrate includes a feeding circuit, an input end of the feeding circuit is connected to an input end of the coaxial connector, and an output end of the feeding circuit passes through a hole in the coaxial connector housing Feeding the next active circuit of the coaxial connector; the feed circuit is co-located with the coaxial connector. 6. The coaxial connector according to claim 5, wherein the coaxial connector is an SMA type coaxial connector, an N-type coaxial connector, a BNC type coaxial connector, or both ends are mounted Metal housing type coaxial connector with coaxial connector. The coaxial connector according to claim 5, wherein the feed circuit is a signal high impedance microstrip line, a high impedance erect stream line or a signal high resistance network.  8  a coaxial connector, comprising a coaxial connector housing, wherein the coaxial connector housing has a substrate; the substrate has a signal input end and a signal output end, and the signal input of the substrate An active circuit is connected between the terminal and the signal output end, and the signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the outer casing of the coaxial connector is provided a substrate, the substrate includes a feeding circuit, and an input end of the feeding circuit is electrically connected to an external power source through a hole in the coaxial connector housing, and an output end of the feeding circuit and the active source The circuit is electrically connected to feed the active circuit; the feed circuit is co-located with the coaxial connector.  9. The coaxial connector according to claim 8, wherein the coaxial connector is an SMA type coaxial connector, an N-type coaxial connector or a BNC type coaxial connector; The connector is a coaxial connector formed by integrally processing the housing and the coaxial connector.  10  The coaxial connector according to claim 8, wherein a DC blocking capacitor is connected between the active circuit and the signal output end, and a feed output end of the feeding circuit is connected to the Between the DC blocking capacitor and the output of the coaxial connector, the next active circuit of the coaxial connector is fed. 11  The coaxial connector according to claim 8, wherein said substrate comprises a voltage dividing circuit An input end of the voltage dividing circuit is connected to an external power source through a hole in the coaxial connector housing, and two output ends of the voltage dividing circuit are respectively connected to the active circuit and the coaxial connection The output of the device provides different feed voltages to the active circuit and the next stage active circuit of the coaxial connector.  12  The coaxial connector of claim 8 wherein said active circuit is a low noise amplifier, a gain amplifier or an active filter.  13  The coaxial connector according to claim 8, wherein the feed circuit is a signal high impedance microstrip line, a high impedance erect stream line or a signal high resistance network.  14  a coaxial connector, comprising a coaxial connector housing, wherein the coaxial connector housing has a substrate; the substrate has a signal input end and a signal output end, and the signal input of the substrate An active circuit is connected between the terminal and the signal output end, and the signal input end and the signal output end of the substrate are respectively connected to the input end and the output end of the coaxial connector; the substrate comprises a feed circuit. An external power source is electrically connected to an input end of the feed circuit through an input end of the coaxial connector, and an output end of the feed circuit is electrically connected to the active circuit to feed the active circuit; The feed circuit is co-located with the coaxial connector. 15  The coaxial connector according to claim 14, wherein the coaxial connector is an SMA type coaxial connector, an N-type coaxial connector or a BNC type coaxial connector; The device is a coaxial connector formed by integrally processing the casing and the coaxial joint.  16  The coaxial connector according to claim 14, wherein a DC blocking capacitor is connected between the active circuit and the signal output end, and a feed output end of the feeding circuit is connected to the Between the DC blocking capacitor and the output of the coaxial connector, the next active circuit of the coaxial connector is fed. 17 The coaxial connector according to claim 14, wherein the substrate comprises a voltage dividing circuit; An input end of the voltage dividing circuit is connected to an external power source through a hole in the coaxial connector housing, and two output ends of the voltage dividing circuit are respectively connected to the active circuit and the coaxial connection The output of the device provides different feed voltages to the active circuit and the next stage active circuit of the coaxial connector.  18  The coaxial connector according to claim 14, wherein said active circuit is a low noise amplifier, a gain amplifier or an active filter.  19  The coaxial connector according to claim 14, wherein the feed circuit is a signal high impedance microstrip line, a high impedance erect stream line or a signal high resistance network.