KR20070045389A - Tester for repeater - Google Patents

Abstract

The present invention relates to a test apparatus for a repeater, and in particular, the RF signal received in the downlink direction is transmitted to another antenna through a coupler, a first duplex, a first LNA, a down converter, a first HAP, a second duplex, a coupler, and another A repeater having a second LNA, an up-converter, and a second HPA for transmitting an RF signal received through an antenna to a first duplex through a coupler and a second duplex in the uplink direction, installed between the second duplex and the coupler And a first test terminal for extracting an RF signal transmitted in the link direction, and a second test terminal provided between the first duplex and the coupler and extracting an RF signal transmitted in the uplink direction. Therefore, according to the present invention, a test terminal is installed between the duplex and the coupler in the up / down link direction so that the RF signal can be directly transmitted to the antenna even during the test by extracting the RF signal through the test terminal. The RF relay service can be supported without installing a separate service antenna.

RF repeater, test terminal, RF repeater service

Description

Test device of repeater {TESTER FOR REPEATER}

1 is a circuit block diagram showing a test apparatus for a conventional RF repeater;

Figure 2 is a circuit block diagram showing a test apparatus of the RF repeater according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100, 114: antenna 102, 110: duplex

104, 116: LNA 106, 118: Up / Down Converters

108, 120: HPA 112: separator

122: control unit 130: first test terminal

132: second test terminal

The present invention relates to a repeater, and more particularly, to a test apparatus for a repeater capable of supporting a relay service during a test without installing a separate service antenna.

At present, the service users are gradually increasing with the development of wireless communication systems such as mobile phones. Since the wireless base station is expensive, in the low traffic area, a repeater is installed mainly to amplify and transmit the signal between the base station and the wireless terminal.

The repeater used in such a wireless communication system uses the same frequency channel for uplink (uplink) toward the wireless base station in the wireless terminal and downlink channel signals for the wireless terminal in the wireless base station, and time-divisions them. The downlink channel signal and the uplink channel signal are transmitted in a time division duplex (TDD) manner. That is, in this time division (TDD) wireless repeater, the downlink and uplink channel signals have the same frequency, whereas the transmission time is separated. This time division wireless repeater uses an RF repeater.

1 is a circuit block diagram showing a test apparatus for a conventional RF repeater.

Referring to FIG. 1, the RF repeater according to the prior art includes an antenna 10, a first duplex 12, a first low noise amplifier 14 (LNA) 14, and a down converter in a downlink direction. 16), a first high power amplifier (HPA) 18, which is a high voltage amplifier, a second duplex 20, a coupler 21, and another antenna 22.

The RF repeater includes a second LNA 24, an up converter 26, and a second HPA 28 in the uplink direction.

The RF repeater configured as described above receives the RF signal TX received from the wireless base station (not shown) through the antenna 10 through a band pass filter (not shown), a coupler (not shown), and the like. The first duplex 12 is sequentially transmitted to the first LNA 14, the down converter 16, and the first HPA 18 in the downlink direction, and the antenna 22 is passed through the second duplex 20 and the coupler 21. ) To a wireless terminal (eg, mobile communication terminal, wireless notebook, etc.).

On the contrary, the RF repeater transmits the RF signals RX0 and RX1 received from the wireless terminal through the antenna 22 in the uplink direction through the coupler 21 and the second duplex 20 during the uplink. , Up converter 26, second HPA 28, and first antenna 12 via antenna 10 via a first duplex 12 and a coupler (not shown).

On the other hand, such an RF repeater uses the first test terminal 32 between the first HPA 18 and the second duplex 20 in the downlink direction, and the second HPA 28 and the first duplex 12 in the uplink direction. ) Further includes a second test terminal 34. The first and second test terminals 32 and 34 extract RF signals output from the first HPA 18 and the second HPA 28 of the RF repeater, respectively, and determine whether the level of the extracted RF signal has a predetermined value. The downlink / uplink RF signal of the RF repeater was tested by measuring whether or not.

However, since the RF repeater according to the prior art simply extracts and tests the RF signal through the first and second test terminals 32 and 34, the RF signal cannot be transmitted to the base station or the wireless terminal through the antenna during the test. . In order to transmit the RF signal during the test, separate antennas for transmitting the RF signal must be installed at the first and second test terminals 32 and 34 in the uplink / downlink direction.

An object of the present invention is to solve the problems of the prior art as described above, by providing a test terminal in each of the up / downlink direction duplex by extracting the RF signal through the test terminal while transmitting the RF signal directly to the antenna It is possible to provide a test apparatus for a repeater that can support an RF relay service during a test without installing a separate service antenna connected to the test terminal.

In order to achieve the above object, the present invention transmits an RF signal received in the downlink direction to another antenna through a coupler, a first duplex, a first LNA, a down converter, a first HAP, a second duplex, and a coupler, and transmits another antenna. A repeater having a second LNA, an up converter, and a second HPA for transmitting an RF signal received through a coupler and a second duplex in an uplink direction to a first duplex, is installed between the second duplex and the coupler in a downlink direction The apparatus further includes a first test terminal for extracting an RF signal transmitted to the second test terminal, and a second test terminal for extracting an RF signal transmitted in an uplink direction between the first duplex and the coupler.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

2 is a circuit block diagram showing a test apparatus of the RF repeater according to the present invention.

Referring to FIG. 2, the RF repeater according to the present invention includes an antenna 100, a first duplex 102, a first LNA 104, a down converter 106, a first HPA 108 and a downlink direction. And a second duplex 110, a coupler 112, and another antenna 114. Although not shown in the drawings, a band pass filter (BPF) and a coupler are included between the antenna 100 and the first duplex 102, and between the coupler 112 and the other antenna 114. Band pass filters and the like.

The RF repeater according to the present invention includes a second LNA 116, an up converter 118, and a second HPA 120 in the uplink direction.

In addition, the RF repeater according to the present invention further includes a first test terminal 130 between the second duplex 110 and the coupler 112 in the downlink direction. In addition, the RF repeater according to the present invention further includes a second test terminal 132 between the first duplex 102 in the uplink direction and the coupler (not shown) (or the antenna 100).

The RF repeater according to the present invention configured as described above receives the RF signal TX received from the wireless base station (not shown) through the antenna 100 during the downlink through a band pass filter, a coupler (not shown), and the like. Via the duplex 102, it is sequentially transmitted through the first LNA 104, the down converter 106, the first HPA 108, the second duplex 110 in the downlink direction. The RF signal transmitted in the downlink direction through the second duplex 110 is extracted through the first test terminal 130 to test the RF signal level through test equipment, and during the test, the coupler 112 and the antenna ( 114) an RF signal can be transmitted to the wireless terminal.

In addition, the RF repeater according to the present invention, the RF signal (RX0, RX1) received from the wireless terminal through the antenna 114 during the uplink, the second LNA in the uplink direction through the coupler 112 and the second duplex (110) 116, up converter 118, second HPA 120, and first duplex 102 are sequentially delivered. The RF signal transmitted in the uplink direction through the first duplex 102 is extracted through the second test terminal 132 to test the RF signal level with test equipment, and during the test, a coupler (not shown) and Transfer to a wireless base station via the antenna (100).

Therefore, the RF repeater according to the present invention extracts the RF signal through the first test terminal 130 and the second test terminal 132 provided at the front end of the second duplex 110 and the rear end of the first duplex 102, respectively. To test it. And, while testing the extracted RF signal level through the test terminals 130, 132 installed between the second duplex 110 and the coupler 11, between the first duplex 102 and the coupler (not shown) An RF signal may be transmitted to the base station or the wireless terminal through 100 and 114.

As described above, according to the present invention, an RF signal can be directly transmitted to the antenna during the test by extracting an RF signal through the test terminal by providing a test terminal between the duplex and the coupler in the up / down link direction.

Therefore, the present invention can support an RF relay service capable of transmitting an RF signal to a base station or a wireless terminal when testing an RF repeater without installing a separate service antenna connected to a test terminal.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (2)

The RF signal received in the downlink direction is transmitted to another antenna through a coupler, a first duplex, a first LNA, a down converter, a first HAP, a second duplex, and a coupler, and uplinks the RF signal received through the other antenna. In the repeater having a second LNA, up-converter, 2HPA for transmitting to the first duplex through the coupler and the second duplex in the direction, A first test terminal installed between the second duplex and the coupler and extracting an RF signal transmitted in the downlink direction; A second test terminal installed between the first duplex and the coupler to extract an RF signal transmitted in the uplink direction Repeater test device further comprising. The method of claim 1, And repeating the RF signal at each of the first and second test terminals while transmitting the RF signal through an antenna connected to each duplex and coupler.

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