CN101043239B - A system for biasing T-heads and controlling antennas - Google Patents

Abstract

The invention provides a bias T-shaped head, including a first port, a second port, a third port, a DC blocking capacitor, a first inductor, a second inductor, and a modem, wherein the second inductor is used to connect the first port , the second port is used to transmit direct current; the present invention also provides a system for controlling the antenna, including an electric-tunable antenna drive motor unit, an electric-tunable antenna, a tower top amplifier, a bias T-shaped head and a base station; the bias T-shaped head provided according to the present invention With a T-shaped head, when upgrading from a non-electrically adjustable antenna to an electronically adjustable antenna, there is no need to replace it with a STMA, reducing costs; avoiding the addition of an electronically adjustable antenna controller, and also avoiding the technical problem of poor applicability when using an electronically adjustable antenna controller , and does not require the base station to provide a connection interface, nor does it require a long cable connection, which reduces the installation workload.

Description

A system for biasing T-heads and controlling antennas

technical field

The invention relates to the communication field, in particular to a system for biasing a T-shaped head and controlling an antenna.

Background technique

SBT (Smart Bias Tee, intelligent bias T-shaped head) is a device that can cooperate with the electric adjustable antenna and RCU (Remote Control Unit, electric adjustable antenna drive motor unit) to realize the electronic adjustable antenna function. Please refer to Figure 1, the following describes the structure of the standard SBT in detail, see Figure 1, the standard SBT includes:

Port1101, which is connected to Port2102 through a DC blocking capacitor 106 for radio frequency signal transmission;

Inductance 104, one end is connected with DC blocking capacitor and Port2102; the other end is connected with RS475/OOK modem 105;

Port2102 is connected with DC blocking capacitor 106 and inductor 104, and this port transmits control signals and DC;

The RS475/OOK modem 105 processes the control signals of Port1101 and Port2102 and transmits them to Port3103;

Port3103, which sends control signals and DC to the drive motor unit of the electric adjustable antenna.

When powered on, the direct current enters the SBT from Port (port) 2102, and then flows out from the Port3 power pin of the AISG (AntennaInterface Standards Group) interface to provide direct current for the RCU. Port1101 has no direct current input, because it is connected to the antenna port, and the direct current needs to be completely cut off.

See Figure 2 for the system connection of using SBT to realize ESC. The whole system includes: antenna 201 , SBT 202 , RCU 203 and base station 204 . Among them, Port1101 of SBT202 is connected to antenna 201, Port2102 is connected to base station 204 through a feeder, DC flows into Port3103 through Port2102; Port3103 is connected to RCU203, RCU203 will control the working condition of antenna 201 through control signals, and base station 204 is also connected to antenna 201 through a feeder.

In the antenna feedback system of the base station, if you want to use the electric adjustable antenna and the tower amplifier at the same time, the ordinary TMA (Tower Mounted Amplifier, tower mount amplifier, referred to as "tower amplifier") cannot be used, and only the STMA (Smart Tower Mounted Amplifier, AISG TMA, Smart Tower Mounted Amplifier). The reason is that the ordinary TMA does not have an interface to connect with the electric adjustable antenna, but the STMA has this interface, so it can work with the electronically adjustable antenna.

The comparison of the base station antenna system using the ordinary antenna and the electric adjustable antenna in the original base station is shown in Fig. 3 and Fig. 4. Fig. 3 shows the base station antenna system in which the TMA and the common antenna are applied together. The system includes antenna 301, TMA302 and base station 303; The TMA302 is respectively connected to the antenna 301 and the base station 303 through two feeders to transmit signals. Figure 4 shows the base station antenna system applied together through STMA after being upgraded to an electric adjustable antenna. The system includes: electric adjustable antenna 401, RCU402, STMA403 and base station 404; STMA403 is connected to RCU402 to transmit control signals and DC; The feeder is connected with the electric adjustable antenna 401 and the base station 404 for communication

However, in many cases, the antenna feeder system of the base station built in the early days used non-electrically adjustable antennas and ordinary TMAs. When it needs to be upgraded to an electrically adjustable antenna, the original ordinary TMA cannot support the electrically adjustable antenna, so it is necessary to use STMA to convert the It is replaced, causing a lot of waste. Since both TMA and STMA are relatively expensive devices, the cost of replacement is high and uneconomical.

For some base station systems, since there is no suitable STMA, only ordinary TMA can be used, and ordinary TMA and electric adjustable antenna are required to be used together. The existing technology adopts the mode of independent control of electric adjustable antenna. As shown in FIG. 5 , the system includes: an electronically adjustable antenna 501 , an RCU 502 , a TMA 503 , an electronically adjustable antenna controller 504 and a base station 505 . Based on the use of TMA in Figure 3, this solution uses an electronically adjustable antenna controller 504, which is connected to the RCU502 and the base station 505 of the electronically adjustable antenna through control cables. Power is provided to the RCU 502 by the electronically adjustable antenna controller 504 through a control cable, so that the electronically adjustable antenna 501 can be controlled.

Usually, the base station provides an interface for connecting with the controller of the electronically adjustable antenna, and is connected to the controller through an interface cable, so that the base station can control the electronically adjustable antenna. But there are following defects in this scheme:

1. Due to the need to use an electronically adjustable antenna controller, the controller has certain requirements for the installation environment and working conditions, so the applicability of this solution is relatively poor;

2. The ESC antenna controller needs to be connected to the base station, so the base station is required to provide a connection interface, and some base stations may not be able to provide this interface, so this solution is limited by the conditions of the base station, and its versatility is limited;

3. Since the length of the control cable is usually relatively long, the workload of installation and construction is relatively large.

Contents of the invention

The embodiments of the present invention provide the following technical solutions to solve the technical problems of high cost when upgrading the electronically adjustable antenna, or low applicability, limited versatility, and relatively large installation and construction workload after upgrading to the electronically adjustable antenna of:

An embodiment of the present invention provides a bias T-shaped head, including a first port, a second port, a third port, a DC blocking capacitor, a first inductor, a second inductor, and a modem;

The first port is used to transmit radio frequency signals through the DC blocking capacitor and the second port; transmit DC through the second inductor and the second port;

The DC blocking capacitor is used to connect the first port and the second port to transmit the radio frequency signal;

The second port is used to receive direct current from the base station and transmit control signals and radio frequency signals;

One end of the first inductor is connected to the DC blocking capacitor and the second port, and the other end is connected to a modem for transmitting the control signal and DC;

The modem is configured to receive the control signal and direct current, process the control signal, and output the processed control signal and direct current to the third port;

The second inductor is used to connect the first port and the second port to transmit the direct current;

The third port is connected with the modem and used for outputting control signals and direct current.

An embodiment of the present invention also provides a bias T-shaped head, including a first port, a second port, a third port, an inductor, a DC blocking capacitor, and a modem;

The second port is used to receive direct current from the base station and transmit control signals and radio frequency signals;

The DC blocking capacitor is used to connect the first port and the second port to transmit the radio frequency signal;

One end of the inductor is connected to the DC blocking capacitor and the second port, and the other end is connected to the modem for transmitting the control signal and DC;

The modem is configured to receive the control signal and direct current, process the control signal, and output the processed control signal and direct current to the third port;

The third port is connected to a modem for outputting control signals and direct current;

The first port is used to transmit radio frequency signals to the second port through the DC blocking capacitor; it is connected to the third port to receive the direct current transmitted by the third port.

The embodiment of the present invention also provides a bias T-shaped head, including a first port, a second port, a third port, an inductor, and a modem;

The first port is used to receive direct current from the second port and transmit radio frequency signals with the second port;

The second port is used to receive direct current from the base station and transmit control signals and radio frequency signals;

One end of the inductor is connected to the first port and the second port, and the other end is connected to the modem for transmitting the control signal and direct current;

A modem, configured to receive the control signal and direct current, process the control signal, and output the processed control signal and direct current to the third port;

The third port is connected with the modem for outputting control signals and direct current.

On the basis of applying the above-mentioned offset T-shaped head, the embodiment of the present invention also provides a system for controlling the antenna, the system includes: electronically adjustable antenna drive motor unit, electrically adjustable antenna, tower top amplifier, offset T-shaped head and base station;

The drive motor unit of the electric adjustable antenna is used to receive the control signal and direct current transmitted by the bias T-shaped head; it is connected to the electric adjustable antenna, and controls the downtilt angle of the electronic adjustable antenna according to the content of the received control signal;

The electric adjustable antenna is used to receive the control signal transmitted by the electric adjustable antenna driving motor unit, and adjust according to the control signal;

The tower-mounted amplifier is used for transmitting radio frequency signals and direct current with the bias T-shaped head;

The biased T-shaped head is used to connect with the drive motor unit of the electric adjustable antenna to transmit control signals and direct current; to transmit control signals, radio frequency signals and direct current to the base station;

The base station is used for connecting with the bias T-shaped head, transmitting control signals and direct current, and connecting with the tower top amplifier for transmitting radio frequency signals, direct current and control signals.

According to the offset T-shaped head provided by the embodiment of the present invention, when upgrading from a non-electrically adjustable antenna to an electrically adjustable antenna, it does not need to be replaced with an STMA, which reduces the cost; avoids the addition of an electrically adjustable antenna controller, and avoids the use of There is a technical problem of poor applicability when the antenna controller is electrically adjustable, and it does not require the base station to provide a connection interface, nor does it need a long cable connection, which reduces the installation workload.

Description of drawings

Fig. 1 is the structural representation of SBT in the prior art;

Fig. 2 is a system diagram of the prior art using SBT to realize the function of electric adjustable antenna;

FIG. 3 is a diagram of a base station antenna system using a common antenna in the prior art;

Fig. 4 is a system diagram of a base station antenna upgraded to an electric adjustable antenna in the prior art;

FIG. 5 is a system diagram of an electronically adjustable antenna controller used in a conventional TMA system in the prior art;

FIG. 6 is a schematic structural diagram of a DSBT according to Embodiment 1 of the present invention;

FIG. 7 is a schematic structural diagram of a DSBT according to Embodiment 2 of the present invention;

FIG. 8 is a schematic structural diagram of a 3DSBT according to an embodiment of the present invention;

FIG. 9 is an application diagram of a DSBT in a base station antenna system according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1, in the embodiment of the present invention, the offset T-shaped head structure can also be shown in Figure 6. The implementation of DSBT (DCPASS-SBT) is that the antenna port of the standard SBT is connected to a direct current. The principle comparison between the standard SBT and the DSBT is as follows As shown in Figure 1 and Figure 6, it can be seen that the DC input of port 2 is introduced into port 1 through the inductor in the DSBT, then port 1 can receive DC and provide DC for the tower top amplifier.

Referring to Figure 6, the structure diagram of Embodiment 1 of the present invention includes:

Port1601 is used to transmit radio frequency signals through the DC blocking capacitor 604 and Port2602; transmit the DC through the second inductor 607 and Port2602; this port is also connected to the tower-mounted amplifier to transmit DC to the tower-mounted amplifier;

The DC blocking capacitor 604 is used to connect Port1601 and Port2602 to transmit the radio frequency signal;

Port2602, used to receive DC from the base station, and transmit control signals and radio frequency signals;

The first inductor 605 is used to connect one end to the DC blocking capacitor 604 and Port2602, and the other end to connect to the modem 606 for transmitting the control signal and DC;

Modem 606, used to receive the control signal and DC, process the control signal, and output the processed control signal and DC to Port3603; the modem can be RS475/OOK model;

The second inductor 607: used to connect Port1601 and Port2602 to transmit the DC.

Port3603, connected with modem 606, is used to output control signal and direct current; it is also used to transmit control signal and direct current to RCU.

Embodiment 2, in the embodiment of the present invention, the offset T-shaped head structure can also be as shown in Figure 8, the implementation of DSBT (DC PASS-SBT) is that the antenna port of the standard SBT is connected to a direct current, and the principle of the standard SBT and DSBT As shown in Figure 1 and Figure 7, it can be seen that the DC output part of port 3 (that is, the DC output from the power wire of the AISG interface) is connected to port 1 through a wire in the DSBT, then port 1 can receive DC. Provide the required DC for the tower mounted amplifier.

Referring to Figure 7, the structure diagram of Embodiment 2 of the present invention includes:

Port1701 is used to transmit radio frequency signals through the DC blocking capacitor 704 and Port2702; it is connected to Port3703 to receive the direct current transmitted by Port3703;

The DC blocking capacitor 704 is used to connect Port1701 and Port2702 to transmit the radio frequency signal;

Port2702, used to receive DC from the base station, and transmit control signals and radio frequency signals;

An inductor 705 is used to connect one end to the DC blocking capacitor 704 and Port2702, and the other end to be connected to the modem 706 for transmitting the control signal and DC;

modem 706, configured to receive the control signal and DC, process the control signal, and output the processed control signal and DC to Port3703;

Port3703, connected with the modem 706, is used to output control signals and direct current; it is also used to transmit control signals and direct current to the RCU.

Embodiment 3, in the embodiment of the present invention, the offset T-shaped head structure is shown in Figure 8, and the implementation of DSBT (DC PASS-SBT) is that the antenna port of the standard SBT is connected to direct current, and the principles of the standard SBT and DSBT are compared as shown in the figure 1. As shown in Figure 8, it can be seen that the DC blocking capacitor in the standard SBT circuit is removed in Embodiment 3, and DC is allowed to be sent to the antenna port. In this way, part of the DC coming from the feeder flows to the AISG interface, and the power supply regulation For the antenna, a part penetrates the antenna port to the TMA to provide it with DC.

Referring to Figure 8, the structure diagram of Embodiment 3 of the present invention includes:

Port1801, used to receive DC from the second port, and transmit RF signals with Port2802; this port is connected to the tower mounted amplifier, and transmits DC to the tower mounted amplifier;

Port2802, used to receive DC from the base station, and transmit control signals and radio frequency signals;

Inductor 804, one end is connected to Port1801 and Port2802, and the other end is connected to modem 805, for transmitting the control signal and DC;

The modem 805 is used to receive the control signal and direct current, process the control signal, and output the processed control signal and direct current to Port3803; the modem can be RS475/OOK model;

Port3803 is connected with the modem 805 and is used for outputting control signals and direct current, that is, sending direct current and control signals processed by the modem to the RCU.

The application of DSBT (DC PASS-SBT) is as follows, see Figure 9:

The electronically adjustable antenna 901 is used to receive the downtilt angle control signal transmitted by the RCU902, and adjust according to the control signal, mainly the adjustment of the downtilt angle;

RCU902 is used to receive the control signal and DC transmitted by the DSBT904; this unit is also connected to the electronically adjustable antenna 901, and controls the downtilt angle of the electronically adjustable antenna 901 according to the content of the received control signal;

TMA903, used for RF signal and DC transmission with DSBT904;

DSBT904, used to connect with RCU902, transmit control signal and DC; transmit control signal, radio frequency signal and DC with base station 905;

The base station 905 is used to connect with the DSBT904 to transmit control signals and direct current; it is connected to the TMA to transmit radio frequency signals, direct current and control signals.

According to the offset T-shaped head provided by the embodiment of the present invention, when upgrading from a non-electrically adjustable antenna to an electrically adjustable antenna, it does not need to be replaced with an STMA, which reduces the cost; avoids the addition of an electrically adjustable antenna controller, and avoids the use of There is a technical problem of poor applicability when the antenna controller is electrically adjustable, and it does not require the base station to provide a connection interface, nor does it need a long cable connection, which reduces the installation workload.

The descriptions of the above embodiments are only used to help understand the method and the idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (4)

1. a biasing T-shaped head is characterized in that, comprises first port, second port, the 3rd port, capacitance, first inductance, second inductance, modulator-demodulator;

Described first port is used for being connected with tower amplifier and carries out radiofrequency signal and direct current transmission, by the described capacitance and the second port transmission radiofrequency signal; By described second inductance and the second port transmission direct current;

Described capacitance is used to connect first port, second port, transmits described radiofrequency signal;

Described second port is used to receive the direct current from the base station, and transmission of control signals and radiofrequency signal;

Described first inductance, an end is connected with the described capacitance and second port, and the other end is connected with modulator-demodulator, is used to transmit described control signal and direct current;

Described modulator-demodulator is used to receive described control signal and direct current, handles described control signal, control signal and direct current after the output of the 3rd port is handled;

Described second inductance is used to connect first port, and second port transmits described direct current;

Described the 3rd port is connected with modulator-demodulator, is used for to electrical tilt antenna drive motor unit output control signal and direct current.

2. a biasing T-shaped head is characterized in that, comprises first port, second port, the 3rd port, inductance, capacitance, modulator-demodulator;

Described second port is used to receive the direct current from the base station, and transmission of control signals and radiofrequency signal;

Described capacitance is used to connect first port, second port, transmits described radiofrequency signal;

Described inductance, an end is connected with the described capacitance and second port, and the other end is connected with modulator-demodulator, is used to transmit described control signal and direct current;

Described modulator-demodulator is used to receive described control signal and direct current, handles described control signal, control signal and direct current after the output of the 3rd port is handled;

Described the 3rd port is connected with modulator-demodulator, is used for to electrical tilt antenna drive motor unit output control signal and direct current;

Described first port is used for being connected with tower amplifier and carries out radiofrequency signal and direct current transmission, by the described capacitance and the second port transmission radiofrequency signal; Be connected with the 3rd port, receive the direct current of the 3rd port transmission.

3. a biasing T-shaped head is characterized in that, comprises first port, second port, the 3rd port, inductance, modulator-demodulator;

Described first port is used for being connected with tower amplifier and carries out radiofrequency signal and direct current transmission, receives the direct current from second port, and with the second port transmission radiofrequency signal;

Described second port is used to receive the direct current from the base station, and transmission of control signals and radiofrequency signal;

Described inductance, an end is connected with first port, second port, and the other end is connected with modulator-demodulator, is used to transmit described control signal and direct current;

Modulator-demodulator is used to receive described control signal and direct current, handles described control signal, control signal and direct current after the output of the 3rd port is handled;

The 3rd port is connected with modulator-demodulator, is used for to electrical tilt antenna drive motor unit output control signal and direct current.

4. the system of a control antenna is characterized in that, this system comprises: electrical tilt antenna drive motor unit, electrical tilt antenna, tower amplifier, claim 1,2 or 3 described biasing T-shaped head and base stations;

Described electrical tilt antenna drive motor unit is used to receive biasing T-shaped head control signals transmitted and direct current; Be connected with electrical tilt antenna, the angle of declination of electrical tilt antenna controlled according to the content of the control signal that receives;

Described electrical tilt antenna is used to receive electrical tilt antenna drive motor unit control signals transmitted, adjusts according to described control signal;

Described tower amplifier is used for carrying out radiofrequency signal and direct current transmission with biasing T-shaped head;

Described biasing T-shaped head is used for being connected transmission of control signals and direct current with the electrical tilt antenna drive motor unit; With base station transmits control signal, radiofrequency signal and direct current;

Described base station is used for being connected with biasing T-shaped head, and transmission of control signals and direct current are connected transmitting radio frequency signal, direct current, control signal with tower amplifier.

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