KR200309197Y1 - A beam tilt antenna with tower mount amplifier - Google Patents

Abstract

The present invention relates to a beam tilt antenna used in a wireless communication system, and more particularly, a tower top amplifier having an integrated structure is integrally mounted on one side of the antenna to simplify the entire system by jointly using a power supply and a control unit. It relates to a beam tilt antenna.

In the beam tilt antenna according to the related art, a motor controller for controlling the step motor used to tilt the beam is remotely located, and a tower top amplifier for compensating for cable loss occurring between the base station and the antenna is separately provided. There was a problem that the cost for configuring the system increases because it must be installed.

The present invention has been made to solve the above-mentioned conventional problems, and aims to simplify the configuration of the system by configuring a tower top amplifier integrally attached to one side of the beam tilt antenna so that the power supply and the control circuit unit are jointly used. do.

In addition, the tower top amplifier uses an integrated housing to connect a transmission / reception filter formed at an upper portion thereof, a low noise amplifier, a motor driver, a power supply, and a control circuit portion formed at a lower portion thereof by a loop to reduce loss and minimize generation of IM. Characterized in that.

Description

A beam tilt antenna with tower mount amplifier having an integrated structure

The present invention relates to a beam tilt antenna used in a wireless communication system, and more particularly, a tower top amplifier having an integrated structure is integrally mounted on one side of the antenna to simplify the entire system by jointly using a power supply and a control unit. It relates to a beam tilt antenna.

Here, the housing of the tower top amplifier is divided into upper and lower parts, a transmission and reception filter is formed at the upper portion, and a low noise amplifier, a power supply, a control circuit unit and a motor driver are provided at the lower portion to form an integrated structure by connecting by a loop. Have

In general, base stations and antenna systems installed outdoors have to be installed at a considerable distance from each other, and long coaxial lines connecting them serve to increase system noise. In fact, a 7/8 inch coaxial line has a loss of about 0.06 dB per meter at a frequency of 2 GHz, so when 50m is installed, it has a line loss of 3 dB and a connection loss of about 1 dB, which causes system noise. The performance of the receiver is greatly degraded.

In this case, if the tower tower amplifier is installed between the base station and the antenna, compensation by cable loss is possible and the loss in the reception path can be overcome. In general, the tower top amplifier includes a transmission filter unit and a reception signal passing only a transmission signal. And a duplexer coupled to a receiving filter unit for passing a bay, a low noise amplifier for low noise amplifying the received signal, a power source and a power line for supplying power to the low noise amplifier, and an RF cable for coupling the components. In this case, when the antenna is used for both transmitting and receiving, a high isolation value must be maintained between the transmission path and the reception path to minimize signal interference or unnecessary signals.

However, the prior art uses RF cables to fabricate the components individually and to combine them in the housing, which not only increases the losses caused by the cables and connection connectors, but also increases the number of connections resulting in the generation of IM. There was a problem in that the performance was reduced.

In addition, when the antenna used in the system is a beam tilt antenna, since the motor controller for controlling the step motor used to tilt the beam must be used separately from the tower top amplifier, the cost for constructing the system is increased. There was a problem to increase.

The present invention has been made to solve the above-mentioned problems, characterized in that the tower tower amplifier is integrally attached to one side of the beam tilt antenna to simplify the configuration of the system by using the power supply and the control circuit unit jointly. An object of the present invention is to provide a beam tilt antenna equipped with a tower top amplifier having an integrated structure.

In addition, the tower top amplifier uses an integrated housing to connect a transmission / reception filter formed at an upper portion thereof, a low noise amplifier, a motor driver, a power supply, and a control circuit portion formed at a lower portion thereof by a loop to reduce loss and minimize generation of IM. Characterized in that.

1 is a block diagram illustrating an embodiment of a beam tilt antenna equipped with a tower top amplifier having an integrated structure according to the present invention;

FIG. 2 is a top / bottom plan view showing the signal transmission path of FIG. 1. FIG.

3 is a cross-sectional view showing an embodiment of a beam tilt antenna equipped with a tower top amplifier having an integrated structure according to the present invention.

4 is an external view of FIG. 3.

※ Explanation of code for main part of drawing

101. Antenna 102. Bias-T

103. Transmission filter 104-1. First Receive Filter

104-2. Second Receive Filter 105-1. First switch

105-2. 2nd switch 106. Low noise amplifier

107. Bypass 108. Control circuit

109. Wireless communication unit 110. Motor drive unit

111. Step Motor 112. Phase Shifter

201.Transmission / Reception Port 202. Antenna Feed Line

301. Tower Top Amplifier

303. Loop 304. Circuit Board

305. Radiation element 306. Radom

307. Reflector

In order to achieve the above object, the present invention, a beam tilt antenna for transmitting and receiving a signal by adjusting the beam at a predetermined angle by using a phase shifter provided in front of each radiation element; A first reception filter connected to the beam tilt antenna and a feed line to pass only a reception signal; A first switch for switching the received signal passing through the first receiving filter by a predetermined control signal; A low noise amplifier connected to one terminal of the first switch to suppress noise and amplify the received signal with a predetermined gain; A second switch interworking with the first switch and switching the received signal passing through the low noise amplifier by a predetermined control signal; A bypass line connected to the other terminals of the first switch and the second switch to pass a received signal; An isolator connected to the second switch for protecting the equipment by passing only a forward signal; A second reception filter for re-filtering the reception signal passing through the isolator; A transmission / reception port to which a transmission signal from a base station is input; A bias-tee connected to the transmission / reception port to separate an RF signal from a DC signal; A transmission filter for passing only a transmission signal output from the bias tee; A control circuit unit receiving a DC signal from the bias-tee and supplying power to a low noise amplifier, first and second switches, and a motor driver, and processing a control data signal from a wireless communication unit; A motor driver for receiving a control signal of the control circuit unit to drive a step motor; A housing for receiving the components and protecting them from the external environment; And a step motor positioned at a part of the lower side of the beam tilt antenna to generate a rotational force according to the signal of the motor driver and transmit the rotational force to a phase shifter linked thereto.

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. 1 is a block diagram illustrating an embodiment of a beam tilt antenna equipped with a tower top amplifier having an integrated structure according to the present invention. As shown in the drawing, a beam of the antenna is provided in a housing of the beam tilt antenna. It consists of a phase shifter and a motor for tilting, and the housing of the tower top amplifier includes a transmission filter, a first reception filter, a second reception filter, a low noise amplifier, a bypass line, a first switch, a second switch, an isolator, and a bias tee. It consists of wireless communication unit, control circuit unit and motor driver.

Here, the motor and the motor driver are connected to the serial port, the tower top amplifier is integrally attached to one side of the antenna, a separate hole is formed in the abutment portion, the antenna feed line passes through the hole to the antenna and the reception filter It is configured to connect.

In the transmission path of FIG. 1, the transmission signal from the base station is separated from the RF signal and the direct current signal by the bias tee 102 so that only the transmission signal is passed by the transmission filter 103 through the antenna 101. Exported to free space.

On the other hand, in the case of the reception path, only the received signal is passed through the first reception filter 104-1 by the signal received by the antenna to pass noise by the low noise amplifier 106 through the first switch 105-1. Suppressed and amplified to a predetermined gain. The signal amplified by the low noise amplifier is filtered again by the second receiving filter 104-2 through the second switch 105-2 and an isolator for protecting the equipment by passing only the forward signal. Transmitted to the base station.

In this case, a bypass line 107 is provided between the first switch and the second switch in parallel with a low noise amplifier. The bypass line is designed to allow the system to operate normally without a malfunction when the low noise amplifier malfunctions. The first switch and the second switch are configured to be switched by a control signal of. In addition, the DC signal supplied from the bias-tee drives the low noise amplifier, the control circuit unit 108 for supplying power to the first and second switches and the motor driver 110.

In addition, the control circuit unit 108 receives the signal and controls the step motor 111 when the motor control data signal is transmitted from the wireless communication unit 109.

The wireless communication unit 109 may use a variety of wireless communication modules such as a CDMA module or a Bluetooth module, which receives a wireless signal of a user (not shown) located at a remote location through the wireless communication module, and thus the step motor After performing a signal processing process of extracting a control signal for controlling (111), and transmits to the control circuit unit 108, the control circuit unit 108 receives the signal is interpreted and generates a corresponding driver control pulse The motor driver 110 receiving the control pulse transmits a signal to the step motor 111 directly connected to the serial port to drive the step motor.

The step motor 111 is located in the lower portion of the antenna 101 to generate a rotational force to transfer the rotational force to the phase shifter 112 is linked to the phase value of each phase shifter 112 by the rotational force The beam tilt antenna 101 is configured to be tilted at a predetermined tilting angle by adjusting.

FIG. 2 is a top / bottom plan view illustrating the signal transmission path of FIG. 1. Referring to FIG. 1, a transmission path is first described. After the transmission signal from the base station is separated into an RF signal and a direct current signal by the bias-tee 102, only the transmission signal is passed by the transmission filter 103 and the antenna is passed. It is sent out to the free space through the antenna 101 connected to the feed line 202.

In contrast, the reception path is a signal received by the antenna 101 is passed by the first reception filter 104-1, only the reception signal is passed through the first switch 105-1 by the low noise amplifier 106 Noise is suppressed and amplified with a certain gain. The signal amplified by the low noise amplifier is filtered again by the second receiving filter 104-2 through the second switch 105-2 and an isolator for protecting the equipment by passing only the forward signal. Transmitted to the base station.

2, the transmission filter 103 and the transmission / reception port 201 are connected to each other by a loop by forming a through hole at a predetermined position of the housing, as shown by a thick dashed line, and the first reception filter 104. -1) and the first switch 105-1 are also connected to each other by a loop through a through hole formed at a predetermined position of the housing, and the second receiving filter 104-2 and the second switch 105-2 are also connected. Connecting in a loop in the same way reduces connection loss and minimizes IM generation.

Subsequently, the antenna 203 connected to the wireless communication unit 109 is used to receive a radio signal for controlling the motor. When the user located at a remote place transmits a radio signal for controlling the motor, the antenna 203 receives the signal and transmits the radio signal. The wireless communication unit 109 transmits a signal to the control circuit unit 108 through a separate signal processing process, and the control circuit unit 108 interprets this and transmits a corresponding driver control pulse to the motor. Transfer to the driver 110.

The motor driver 110 is directly connected to the step motor 111 on the beam tilt antenna side and a serial port to transfer a control signal to the step motor to drive the step motor.

3 is a cross-sectional view showing an embodiment of a beam tilt antenna equipped with a tower top amplifier having an integrated structure according to the present invention. As shown in the drawing, the beam tilt antenna 101 and the tower top amplifier 301 are shown in FIG. ) Is connected by a separate feed line 202, which is directly connected to the antenna through a predetermined hole formed in the tower top amplifier.

FIG. 4 is an external view of FIG. 3, in which a tower top amplifier 301 is mounted on one side of the beam tilt antenna 101, and a stepper motor attached to a lower side of the beam tilt antenna ( 111 is connected to the motor driver of the tower top amplifier by a serial port or a data line, and an antenna of a wireless communication unit is separately connected to an upper side of the tower top amplifier in order to receive a radio signal from a remote place, and on the right side of the drawing The transmission and reception port 201 for transmitting and receiving a signal with the base station is configured to be connected.

Although the present invention has been described and illustrated with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments and the accompanying drawings, and various modifications and changes are possible without departing from the spirit of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

As described above, the beam tilt antenna equipped with the tower top amplifier having an integrated structure according to the present invention has a simplified system configuration by using a control circuit unit and a power source, thereby reducing the cost of configuring the system. It works.

In addition, an integrated housing is used, and the transmission / reception filter formed on the upper portion, the low noise amplifier, the control circuit portion, and the motor driving portion provided on the lower portion are connected by a loop, thereby reducing losses and minimizing the generation of IM.

Claims (2)

A beam tilt antenna for transmitting and receiving a signal by adjusting a beam at a predetermined angle by using a phase shifter provided in front of each radiation element; A first reception filter connected to the beam tilt antenna and a feed line to pass only a reception signal; A first switch for switching the received signal passing through the first receiving filter by a predetermined control signal; A low noise amplifier connected to one terminal of the first switch to suppress noise and amplify the received signal with a predetermined gain; A second switch interworking with the first switch and switching the received signal passing through the low noise amplifier by a predetermined control signal; A bypass line connected to the other terminals of the first switch and the second switch to pass a received signal; An isolator connected to the second switch for protecting the equipment by passing only a forward signal; A second reception filter for re-filtering the reception signal passing through the isolator; A transmission / reception port to which a transmission signal from a base station is input; A bias-tee connected to the transmission / reception port to separate an RF signal from a DC signal; A transmission filter for passing only a transmission signal output from the bias tee; A control circuit unit receiving a DC signal from the bias-tee and supplying power to a low noise amplifier, first and second switches, and a motor driver, and processing a control data signal from a wireless communication unit; A motor driver for receiving a control signal of the control circuit unit to drive a step motor; A housing for receiving the components and protecting them from the external environment; And a step motor positioned at a portion of the lower side of the beam tilt antenna and configured to generate a rotational force according to the signal of the motor driver and transmit the resultant to a phase shifter linked thereto. Beam tilt antenna. The method of claim 1, The housing is divided into upper and lower parts, The upper part of the transmission filter, the first receiving filter and the second receiving filter are integrally formed, and the lower part of the low noise amplifier, the bypass line, the first switch, the second switch, the isolator, the bias-tee, the wireless communication unit, and the control unit. Circuit part, motor driver is integrally formed on the circuit board, A beam tilt with a tower top amplifier having an integrated structure, wherein the transmission filter and the transmission / reception port, the first reception filter and the first switch, and the second reception filter and the second switch are connected by loops, respectively. antenna.