CN217522812U

CN217522812U - Feed circuit is put to basic station tower

Info

Publication number: CN217522812U
Application number: CN202220476632.5U
Authority: CN
Inventors: 潘世军; 袁贤刚
Original assignee: Huachuang Electronic Science & Information Technology Co ltd
Current assignee: Huachuang Electronic Science & Information Technology Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-09-30
Anticipated expiration: 2032-03-07

Abstract

The utility model provides a feeder circuit is put to basic station tower, include: the radio frequency coupler is used for being connected with the radio frequency signal antenna port and the radio frequency signal receiving and transmitting port respectively; the lightning protection circuit is connected with the radio frequency coupler and used for discharging lightning stroke voltage led in along the radio frequency cable; the bias circuit is connected with the lightning protection circuit; the direct-current power supply filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the control signal filtering and protecting circuit is connected with the biasing circuit and is used for further releasing lightning stroke voltage; the direct current power supply filtering and protecting circuit is used for being connected with the direct current power supply port so as to filter the direct current power supply fed into the tower amplifier; the control signal filtering and protecting circuit is used for being connected with the control signal port so as to carry out low-pass filtering on the control signal. The utility model discloses simple structure, reasonable in design possesses lightning protection, feed and control signal transmission function simultaneously to do not influence the basic station and go upward with down radio frequency signal.

Description

Feed circuit is put to basic station tower

Technical Field

The utility model belongs to the technical field of the basic station circuit technique and specifically relates to a feeder circuit is put to basic station tower is related to.

Background

In order to reduce space loss, mobile phone base stations are all built in places with high outdoor geographic positions, and although the base stations are provided with lightning rods, part of lightning current is still transmitted to a radio frequency module on a signal transmission link in a machine room through a radio frequency coaxial cable (radio frequency cable for short).

In order to reduce the influence of the radio frequency cable on the noise coefficient of the received signal of the base station and expand the coverage area of the base station, a tower amplifier (abbreviated as tower amplifier) is arranged at the top end of the base station to improve the uplink signal link gain. However, at present, a circuit for supplying power to a tower amplifier and realizing related control does not have the functions of lightning protection, feeding and control signal transmission, and even uplink and downlink radio frequency signals of a base station are lost, so that the increasing use requirements cannot be met; therefore, it is necessary to provide a base station tower discharge feed circuit.

SUMMERY OF THE UTILITY MODEL

The utility model provides a feeder circuit is put to basic station tower, this circuit possess lightning protection, feed and control signal transmission function simultaneously to do not influence the basic station and go upward and down radio frequency signal, in order to satisfy above-mentioned demand.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a base station tower discharge feed circuit comprising: the radio frequency coupler is used for being connected with the radio frequency signal antenna port and the radio frequency signal receiving and transmitting port respectively; the lightning protection circuit is connected with the radio frequency coupler and used for discharging lightning stroke voltage led in along the radio frequency cable; the bias circuit is connected with the lightning protection circuit; the direct-current power supply filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the control signal filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the direct-current power supply filtering and protecting circuit is used for being connected with a direct-current power supply port so as to filter a direct-current power supply fed into the tower amplifier; the control signal filtering and protecting circuit is used for being connected with the control signal port so as to carry out low-pass filtering on the control signal.

The utility model discloses an embodiment, the lightning protection circuit includes inductance L1, inductance L2, electric capacity C1 and gas discharge tube F1, inductance L1's one end with radio frequency coupler connects, inductance L1's the other end all with inductance L2's one end electric capacity C1's one end with gas discharge tube F1's one end is connected, electric capacity C1's the other end with back ground connection is connected to gas discharge tube F1's the other end, inductance L2's the other end with biasing circuit connects.

The utility model discloses an embodiment, the lightning protection circuit still includes electric capacity C3, electric capacity C3's one end with inductance L2's the other end is connected, electric capacity C3's other end ground connection.

The utility model discloses an embodiment, the bias circuit includes electric capacity C2 and inductance L3, electric capacity C2 the one end with inductance L3's one end all with lightning protection circuit connects, electric capacity C2's the other end with control signal filtering and protection circuit connect, inductance L3's the other end with DC power supply filtering and protection circuit connect.

The utility model discloses an embodiment, control signal filtering and protection circuit includes TVS diode D1, magnetic bead L4 and first filter circuit, magnetic bead L4's one end with bias circuit connects, magnetic bead L4's the other end all with TVS diode D1's 1 pin with first filter circuit connects, TVS diode D1's 2 pin ground connection, first filter circuit be used for with the control signal port is connected.

The utility model discloses an embodiment, first filter circuit includes inductance L5 and electric capacity C5, inductance L5's one end with magnetic bead L4's the other end is connected, inductance L5's the other end all with electric capacity C5's one end with the control signal port is connected, electric capacity C5's other end ground connection.

The utility model discloses an embodiment, first filter circuit still includes inductance L6 and electric capacity C8, inductance L6 is established ties inductance L5 with electric capacity C5's tie point with between the control signal port, electric capacity C8's one end is connected inductance L6 with between the control signal port, electric capacity C8's other end ground connection.

The utility model discloses an embodiment, DC power supply filtering and protection circuit includes resistance R1, resistance R2, resistance R3, TVS diode D2 and second filter circuit, resistance R1 resistance R2 with resistance R3 one end after connecting in parallel with biasing circuit connects, the other end all with TVS diode D2's negative pole with the second filter circuit connects, TVS diode D2's positive ground, second filter circuit be used for with the DC power port is connected.

The utility model discloses an in one embodiment, the second filter circuit includes electric capacity C4, electric capacity C6, electric capacity C7, electric capacity C9 and inductance L7, electric capacity C4 one end electric capacity C6's one end with after inductance L7's one end is connected with resistance R1 resistance R2 with the other end after resistance R3 connects in parallel, electric capacity C4's the other end with electric capacity C6's the other end is all grounded, inductance L7's the other end all with electric capacity C7's one end electric capacity C9's one end with the direct current power port is connected, electric capacity C7's the other end with electric capacity C9's the other end is all grounded.

The utility model discloses an in the embodiment, the second filter circuit still includes magnetic bead L8, electric capacity C10 and electric capacity C11, magnetic bead L8 is in series inductance L7 electric capacity C7 with electric capacity C9's tie-point with between the direct current power supply port, electric capacity C10's one end with electric capacity C11's one end is all connected magnetic bead L8 with between the direct current power supply port, electric capacity C10's the other end with electric capacity C11's the other end is all ground connection.

To sum up, the utility model discloses following beneficial effect has: the utility model realizes the coupling between the radio frequency cable and the circuit and the isolation between the direct current power port and the radio frequency signal receiving and sending port through the radio frequency coupler, thereby ensuring that the radio frequency signal can be sent to the radio frequency signal antenna port with low loss and the direct current voltage can not enter the radio frequency signal receiving and sending port; the lightning stroke voltage led in along the radio frequency cable is discharged through the lightning protection circuit; the lightning stroke voltage is further discharged through a direct current power supply filtering and protecting circuit, and the direct current power supply fed into the tower amplifier is filtered; the lightning stroke voltage is further discharged through the control signal filtering and protecting circuit, and the control signal is subjected to low-pass filtering to prevent high-frequency components on the line from interfering the radio-frequency signal; the utility model discloses simple structure, reasonable in design possesses lightning protection, feed and control signal transmission function simultaneously to do not influence the basic station and go upward and downlink radio frequency signal.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of a base station tower feeder circuit according to some embodiments of the present invention.

Fig. 2 is a schematic circuit diagram of a base station tower discharge feed circuit according to some embodiments of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "vertical," "horizontal," "top," "bottom," and the like are used in the orientation and positional relationship shown in the drawings for convenience in describing the embodiments of the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not in direct contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the present embodiment provides a base station tower discharge feed circuit, including: the radio frequency coupler W1 is used for being respectively connected with the radio frequency signal antenna port and the radio frequency signal receiving and transmitting port; the lightning protection circuit is connected with the radio frequency coupler W1 and is used for discharging lightning stroke voltage led in along the radio frequency cable; the bias circuit is connected with the lightning protection circuit; the direct-current power supply filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the control signal filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the direct current power supply filtering and protecting circuit is used for being connected with the direct current power supply port so as to filter the direct current power supply fed into the tower amplifier; the control signal filtering and protecting circuit is used for being connected with the control signal port so as to carry out low-pass filtering on the control signal.

It should be understood that the rf coupler W1 implements coupling between the rf cable and the circuit, and isolation between the dc power port and the rf signal transceiving port, so as to ensure that the rf signal can be transmitted to the rf signal antenna port with low loss, and the dc voltage does not enter the rf signal transceiving port; the lightning protection circuit can discharge lightning stroke voltage led in along the radio frequency cable; the direct-current power supply filtering and protecting circuit can further discharge lightning stroke voltage and filter the direct-current power supply fed into the tower amplifier; the control signal filtering and protecting circuit can further discharge lightning voltage and carry out low-pass filtering on the control signal so as to prevent high-frequency components on the line from interfering the radio-frequency signal; the circuit has the advantages of simple structure, reasonable design and relatively low cost, simultaneously has the functions of lightning protection, feed and control signal transmission, and does not influence uplink and downlink radio frequency signals of the base station.

In some embodiments, the lightning protection circuit includes an inductor L1, an inductor L2, a capacitor C1 and a gas discharge tube F1, one end of the inductor L1 is connected to the rf coupler W1, the other end of the inductor L1 is connected to one end of the inductor L2, one end of the capacitor C1 and one end of the gas discharge tube F1, the other end of the capacitor C1 is connected to the other end of the gas discharge tube F1 and then grounded, and the other end of the inductor L2 is connected to the bias circuit.

In some embodiments, the lightning protection circuit further includes a capacitor C3, one end of the capacitor C3 is connected to the other end of the inductor L2, and the other end of the capacitor C3 is grounded.

In some embodiments, the bias circuit includes a capacitor C2 and an inductor L3, one end of the capacitor C2 and one end of the inductor L3 are both connected to the lightning protection circuit, the other end of the capacitor C2 is connected to the control signal filtering and protection circuit, and the other end of the inductor L3 is connected to the dc power filtering and protection circuit. In this scheme, one end of the capacitor C2 and one end of the inductor L3 are both connected to the other end of the inductor L2 and one end of the capacitor C3.

In some embodiments, the control signal filtering and protecting circuit includes a TVS diode D1, a magnetic bead L4, and a first filter circuit, one end of the magnetic bead L4 is connected to the bias circuit, the other end of the magnetic bead L4 is connected to the 1 pin of the TVS diode D1 and the first filter circuit, the 2 pin of the TVS diode D1 is grounded, and the first filter circuit is used for being connected to the control signal port. In this embodiment, one end of the magnetic bead L4 is connected to the other end of the capacitor C2.

In some embodiments, the first filter circuit includes an inductor L5 and a capacitor C5, one end of the inductor L5 is connected to the other end of the magnetic bead L4, the other end of the inductor L5 is connected to one end of the capacitor C5 and the control signal port, and the other end of the capacitor C5 is grounded.

In some embodiments, the first filter circuit further includes an inductor L6 and a capacitor C8, the inductor L6 is connected in series between a connection point of the inductor L5 and the capacitor C5 and the control signal port, one end of the capacitor C8 is connected between the inductor L6 and the control signal port, and the other end of the capacitor C8 is connected to ground. In the scheme, one end of an inductor L6 is connected with the other end of an inductor L5 and one end of a capacitor C5, and the other end of an inductor L6 is connected with one end of a capacitor C8 and a control signal port.

In some embodiments, the dc power filtering and protecting circuit includes a resistor R1, a resistor R2, a resistor R3, a TVS diode D2, and a second filter circuit, wherein one end of the resistor R1, the resistor R2, and the resistor R3 after being connected in parallel are connected to the bias circuit, the other end of the resistor R1, the resistor R2, and the resistor R3 are both connected to the negative electrode of the TVS diode D2 and the second filter circuit, the positive electrode of the TVS diode D2 is grounded, and the second filter circuit is used for being connected to the dc power port. In the scheme, one end of the resistor R1, the resistor R2 and the resistor R3 which are connected in parallel is connected with the other end of the inductor L3.

In some embodiments, the second filter circuit includes a capacitor C4, a capacitor C6, a capacitor C7, a capacitor C9, and an inductor L7, one end of the capacitor C4, one end of the capacitor C6, and one end of the inductor L7 are connected to one end of the resistor R1, the resistor R2, and the other end of the resistor R3, which are connected in parallel, the other end of the capacitor C4 and the other end of the capacitor C6 are both grounded, the other end of the inductor L7 is connected to one end of the capacitor C7, one end of the capacitor C9, and the dc power port, and the other end of the capacitor C7 and the other end of the capacitor C9 are both grounded.

In some embodiments, the second filter circuit further includes a magnetic bead L8, a capacitor C10, and a capacitor C11, the magnetic bead L8 is connected in series between a connection point of the inductor L7, the capacitor C7, and the capacitor C9 and the dc power port, one end of the capacitor C10 and one end of the capacitor C11 are both connected between the magnetic bead L8 and the dc power port, and the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded. In this embodiment, one end of the magnetic bead L8 is connected to the other end of the inductor L7, one end of the capacitor C7, and one end of the capacitor C9, and the other end of the magnetic bead L8 is connected to one end of the capacitor C10, one end of the capacitor C11, and the dc power port.

In some embodiments, the rf coupler W1 may be fabricated using printed board strip lines and integrated into a PCB, or other existing couplers may be used; the model of the inductor L1 is D-1 mm, D-3.2 mm and N-4; the model of the inductor L2 is 291B-09J-LRH; the model of the inductor L3 and the model of the inductor L7 are SLF10165T-220M2R43 PF; the types of the inductor L5 and the inductor L6 are L0603-270; the models of the magnetic beads L4 and L8 are BLM18PG330SN 1; the model of the gas discharge tube F1 is 2027-09-SM; the model of the TVS diode D1 is PSOT 05C; the model of the TVS diode D2 is SMCJ 33A; the model of the resistor R1, the resistor R2 and the resistor R3 is RC2512JK-072R 0L; the type of the capacitor C1 is C1206-220; the type of the capacitor C3 is C1206-220; the type of the capacitor C2 is C1206-103; the types of the capacitor C4, the capacitor C7 and the capacitor C10 are C0603-104; the types of the capacitor C5, the capacitor C6, the capacitor C8, the capacitor C9 and the capacitor C11 are C0603-330;

in the scheme, the frequency of a radio frequency signal is 2.3 GHz-2.4 GHz, the maximum transmitting power is 200W, the frequency of a direct current power supply is 20V-32V)/1.6A, a control signal is a pulse modulation waveform with the frequency of 2.2MHz, and the lightning protection circuit can ensure that the residual voltage of a direct current power supply port is lower than 60V and the residual voltage of a control signal port is lower than 20V.

The above embodiments describe a plurality of specific embodiments of the present invention, but it should be understood by those skilled in the art that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention.

Claims

1. A base station tower discharge feed circuit, comprising:

the radio frequency coupler is used for being connected with the radio frequency signal antenna port and the radio frequency signal receiving and transmitting port respectively;

the lightning protection circuit is connected with the radio frequency coupler and used for discharging lightning stroke voltage led in along the radio frequency cable;

the bias circuit is connected with the lightning protection circuit;

the direct-current power supply filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage;

the control signal filtering and protecting circuit is connected with the biasing circuit and is used for further discharging lightning stroke voltage; the direct-current power supply filtering and protecting circuit is used for being connected with a direct-current power supply port so as to filter a direct-current power supply fed into the tower amplifier; the control signal filtering and protecting circuit is used for being connected with the control signal port so as to carry out low-pass filtering on the control signal.

2. The base station tower discharge feed circuit according to claim 1, wherein the lightning protection circuit comprises an inductor L1, an inductor L2, a capacitor C1 and a gas discharge tube F1, one end of the inductor L1 is connected to the rf coupler, the other end of the inductor L1 is connected to one end of the inductor L2, one end of the capacitor C1 and one end of the gas discharge tube F1, the other end of the capacitor C1 is connected to the other end of the gas discharge tube F1 and then grounded, and the other end of the inductor L2 is connected to the bias circuit.

3. The feeding circuit of claim 2, wherein the lightning protection circuit further comprises a capacitor C3, one end of the capacitor C3 is connected to the other end of the inductor L2, and the other end of the capacitor C3 is grounded.

4. The base station tower discharge feeder circuit according to claim 1, wherein the bias circuit comprises a capacitor C2 and an inductor L3, one end of the capacitor C2 and one end of the inductor L3 are both connected to the lightning protection circuit, the other end of the capacitor C2 is connected to the control signal filtering and protection circuit, and the other end of the inductor L3 is connected to the dc power filtering and protection circuit.

5. The base station tower amplifier feed circuit of claim 1, wherein the control signal filtering and protection circuit comprises a TVS diode D1, a magnetic bead L4, and a first filter circuit, wherein one end of the magnetic bead L4 is connected to the bias circuit, the other end of the magnetic bead L4 is connected to the 1 pin of the TVS diode D1 and the first filter circuit, the 2 pin of the TVS diode D1 is grounded, and the first filter circuit is configured to be connected to the control signal port.

6. The feeding circuit of claim 5, wherein the first filter circuit comprises an inductor L5 and a capacitor C5, one end of the inductor L5 is connected to the other end of the magnetic bead L4, the other ends of the inductors L5 are connected to one end of the capacitor C5 and the control signal port, and the other end of the capacitor C5 is grounded.

7. The feeding circuit of claim 6, wherein said first filter circuit further comprises an inductor L6 and a capacitor C8, said inductor L6 is connected in series between the connection point of said inductor L5 and said capacitor C5 and said control signal port, one end of said capacitor C8 is connected between said inductor L6 and said control signal port, and the other end of said capacitor C8 is grounded.

8. The base station tower discharging feed circuit of claim 1, wherein the dc power filtering and protecting circuit comprises a resistor R1, a resistor R2, a resistor R3, a TVS diode D2 and a second filter circuit, one end of the resistor R1, the resistor R2 and the resistor R3 connected in parallel is connected to the bias circuit, the other end of the resistor R1, the resistor R2 and the resistor R3 are connected to the negative electrode of the TVS diode D2 and the second filter circuit, the positive electrode of the TVS diode D2 is grounded, and the second filter circuit is used for being connected to the dc power port.

9. The base station tower discharge feed circuit of claim 8, wherein the second filter circuit comprises a capacitor C4, a capacitor C6, a capacitor C7, a capacitor C9 and an inductor L7, one end of the capacitor C4, one end of the capacitor C6 and one end of the inductor L7 are connected to one end of the resistor R1, the resistor R2 and the resistor R3 which are connected in parallel, the other end of the capacitor C4 and the other end of the capacitor C6 are both grounded, the other end of the inductor L7 is both connected to one end of the capacitor C7, one end of the capacitor C9 and the dc power port, and the other end of the capacitor C7 and the other end of the capacitor C9 are both grounded.

10. The feeding circuit of claim 9, wherein the second filter circuit further comprises a bead L8, a capacitor C10 and a capacitor C11, the bead L8 is connected in series between a connection point of the inductor L7, the capacitor C7 and the capacitor C9 and the dc power port, one end of the capacitor C10 and one end of the capacitor C11 are both connected between the bead L8 and the dc power port, and the other end of the capacitor C10 and the other end of the capacitor C11 are both connected to ground.