KR20230032037A - Transmitting and receiving apparatus for wireless repeater - Google Patents

Abstract

The present invention relates to a transceiver device for a repeater with an expandable band through block conversion, which is a transceiver device for a repeater with an expandable band through block conversion that converts an FR1 band frequency of an RF signal and an FR2 band frequency of a millimeter wave signal to be used in an existing FR1 band repeater. To this end, disclosed is the transceiver device for a repeater with an expandable band through block conversion, comprising: a downstream frequency reception unit which receives a signal in a millimeter wave band from a reception antenna; a downstream frequency conversion block unit which converts a frequency of the millimeter wave band received from the antenna down to an intermediate frequency for reception by a repeater through block conversion; an upstream frequency conversion block unit which converts the intermediate frequency transmitted from the repeater up to the frequency of the millimeter wave band through block conversion; an upstream frequency transmission unit which transmits a signal in the millimeter wave band converted through the upstream frequency conversion block unit to a transmission antenna; an intermediate frequency sharing block unit which shares a reception path of the intermediate frequency down-converted in the downstream frequency conversion block unit and a transmission path of the intermediate frequency transmitted from the repeater by path switching using one sharing block; and a local oscillator unit which generates a local frequency for multiplication through dual frequency locking and provides the same to the downstream frequency conversion block unit and the upstream frequency conversion block unit.

Description

Transmitting and receiving apparatus for repeater capable of band extension through block conversion {Transmitting and receiving apparatus for wireless repeater}

The present invention relates to a transceiver for a repeater capable of band extension through block conversion, and more particularly, converts a frequency for the FR1 band of an RF signal and a frequency for the FR2 band of a millimeter wave signal so that it can be used in a repeater for the existing FR1 band It relates to a transceiver for a repeater capable of band extension through block conversion.

With the start of the sub-6GHz service, the FR1 band of 5G communication, the acceleration of the 4th industrial revolution has begun. Service is required on 28 GHz and 37 to 40 GHz.

The FR2 band is currently being prepared for service by each country, and Korea, Japan, North America, Europe, etc. allocate the 24 ~ 28GHz band, and the United States, Canada, China, Australia, etc., the 24 ~ 28GHz band and the 37 ~ 40GHz band are allocated as basic frequencies. The technology is currently being developed.

The FR2 band is a millimeter wave band, and it is highly dependent on foreign countries due to a lack of original domestic technology. As the 5G market expands, it is necessary to develop technologies for 37 to 40 GHz as well as 24 to 28 GHz to open up the largest North American market. .

Recently, telecommunications operators in Korea are installing sub-6GHz base stations in the FR1 band, and developing repeater solutions for the FR1 band to cover indoor and shaded areas. According to the technology roadmap, from 2021, it is necessary to install base stations in the FR2 band, 24-28 GHz, and repeaters to eliminate shadow areas, so the development of related equipment is urgent.

On the other hand, as shown in FIG. 1, in a typical 5G system, only one antenna is used, and transmission and reception paths are separated by an RF switch located right in front of the antenna. Since it has to be processed, it usually has a problem that is very difficult to manufacture.

Accordingly, the need to develop mmWave transceivers that can be applied to DAS repeaters in the 5G FR2 band of 37 to 40 GHz is emerging.

Republic of Korea Registration No. 10-1754668 (Title of Invention: Repeater device and method for transmitting and receiving signals according to link operation mode in wireless communication system)

Therefore, the present invention was created to solve the above-mentioned problems, and the difficulty of manufacturing a switch is reduced by using a transmission antenna and a reception antenna separately from each other, instead of using a switch located right in front of the antenna as in the prior art. It is an object of the present invention to provide an invention capable of separating transmission and reception antennas by using patch antennas or waveguide antennas having a very short wavelength and a very small size, and at the same time increasing isolation between transmission and reception.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

The object of the present invention described above is to provide a downlink frequency receiver for receiving a millimeter wave band signal from a receiving antenna, and a downlink frequency receiver for downlink frequency conversion of the millimeter wave band frequency received from the antenna to an intermediate frequency for reception by a repeater through block conversion. A conversion block unit, an up frequency conversion block unit for up-frequency converting the intermediate frequency transmitted from the repeater to a millimeter wave band frequency through block conversion, and an up frequency conversion block unit for transmitting the millimeter wave band signal converted through the up frequency conversion block unit to the transmitting antenna. Up frequency transmission unit, intermediate frequency sharing block unit for sharing the intermediate frequency reception path downconverted by the down frequency conversion block unit and the intermediate frequency transmission path transmitted from the repeater by path switching through one sharing block, dual frequency It can be achieved by providing a transceiver for a repeater capable of band extension through block conversion, characterized in that it includes a local oscillation unit that generates a local frequency for multiplication through locking and provides it to a down frequency conversion block unit and an up frequency conversion block unit. there is.

In addition, the downlink frequency conversion block unit includes a downlink low noise amplification unit that amplifies the frequency of the millimeter wave band received from the antenna, and a downlink frequency generator that multiplies the local frequency for multiplication provided by the local oscillator by a preset multiplier and outputs a multiplied frequency for reception. A downlink mixer unit mixing the multiplication frequency for reception provided by the distribution unit and the downlink frequency multiplication unit with the received frequency of the millimeter wave band and outputting the intermediate frequency for reception by the repeater to the intermediate frequency sharing block unit,

The up frequency conversion block unit includes an up frequency multiplier that multiplies the local frequency for multiplication provided by the local oscillation unit by a predetermined multiplier and outputs a multiplier frequency for transmission, the multiplier for transmission provided by the up frequency multiplier and the intermediate frequency transmitted from the repeater. a down mixer unit that mixes and outputs a millimeter wave band frequency, and an upstream low noise amplification unit that amplifies the millimeter wave band frequency output from the down mixer unit and outputs it to an up frequency transmitter;

The intermediate frequency sharing block unit transmits signals transmitted from the first RF switch unit for primarily switching the transmission path and the reception path, the second RF switch unit for secondarily switching the transmission path and the reception path, and the second RF switch unit. A low noise amplification unit that amplifies, an attenuation unit that attenuates the signal transmitted from the low noise amplifier unit, a third RF switch unit that switches the reception path and transmission path of the signal transmitted from the attenuation unit, and the transmission path and the reception path are tertiary A fourth RF switch unit for switching, a bandpass filter unit for filtering a signal transmitted from the fourth RF switch unit, and a fifth RF switch unit for four-order switching of a transmission path and a reception path,

The first to fifth RF switch units are synchronized to switch between a transmission path and a reception path according to a sync signal provided from the outside.

In addition, the local oscillation unit includes a low noise amplification unit that receives and amplifies the reference frequency;

A first frequency fixing unit that receives the reference frequency output from the low noise amplification unit and firstly fixes the frequency to output the first fixed frequency; receives the first fixed frequency and secondarily fixes the frequency and outputs the second fixed frequency A second frequency fixing unit to do,

A distribution unit for distributing and outputting the second fixed frequency, and a first channel division for redistributing any second fixed frequency output from the distribution unit and outputting local frequencies for multiplication to the downlink frequency multiplier and the uplink frequency multiplier, respectively. and a second channel distributor for redistributing another second fixed frequency output from the distributor and distributor.

According to the present invention as described above, instead of using a switch located right in front of the antenna as in the prior art, the transmission antenna and the reception antenna are separated from each other to solve the difficulty of manufacturing the switch and at the same time increase the isolation between transmission and reception, By using a patch antenna or a waveguide antenna having a very short wavelength and having a very small size, there is an effect of separating transmission and reception antennas.

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is limited to those described in the drawings. It should not be construed as limiting.
1 is a block diagram of a conventional 5G repeater system;
2 is a schematic configuration diagram of a transceiver for a repeater according to an embodiment of the present invention;
3 is a schematic configuration diagram of a local oscillation unit according to an embodiment of the present invention;
4 is a diagram showing a transmission path of a transceiver for a repeater according to an embodiment of the present invention;
5 is a diagram showing a reception path of a transceiver for a repeater according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in the present embodiment cannot be said to be essential as a solution to the present invention. In addition, descriptions of matters obvious to prior art and those skilled in the art may be omitted, and descriptions of these omitted components (methods) and functions may be sufficiently referred to within the scope not departing from the technical spirit of the present invention.

A transceiver for a repeater capable of band expansion through block conversion according to an embodiment of the present invention (hereinafter referred to as a transceiver for a repeater) is a millimeter wave band (as an example, a 28 to 39 GHz band, as shown in FIGS. 2 to 5). It is a transceiver that mutually converts a signal of FR2 band) into an RF signal (approximately 3.5GHz to 6GHz, referred to as FR1 band). At this time, the RF signal means a signal that can be used in the existing repeater. Therefore, the transceiver for a repeater according to an embodiment of the present invention can be installed in a module format in an existing FR1 band repeater to implement an RF2 band repeater through block conversion. In addition, both modes of SISO and MIMO can be supported while mutual band conversion is possible from the FR1 band to the FR2 band.

Hereinafter, a transceiver for a repeater according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the transmitting and receiving apparatus for a repeater according to an embodiment of the present invention roughly includes an intermediate frequency sharing block unit 100, a down frequency conversion block unit 200, an up frequency conversion block unit 300, and a local It includes an oscillation unit 400 .

The downlink frequency receiver 240 according to an embodiment of the present invention generally includes a downlink waveguide antenna unit 243, a downlink low noise amplification unit 242, and a downlink bandpass filter unit 241. The downlink frequency receiving unit 240 receives a signal of the FR2 band from a patch antenna or a waveguide antenna and transmits the signal to the downlink frequency conversion block unit 200 after amplification and filtering.

The downlink frequency conversion block unit 200 according to an embodiment of the present invention includes a downlink mixer unit 210, a downlink low noise amplification unit 220, and a downlink frequency multiplier 230.

The downlink low noise amplifier 220 small-signal amplifies the FR2 band signal input from the downlink bandpass filter 241 .

The downlink frequency multiplier 230 generates a multiplier frequency for reception using the multiplier reference frequency supplied from the first channel distributor 450 of the local oscillation unit 400, which will be described later, and transmits the multiplied frequency to the downlink mixer 210. print out

The downlink mixer unit 210 converts the multiplication frequency for reception transmitted from the downlink frequency multiplier 230 and the frequency of the RF2 band transmitted from the downlink low noise amplification unit 220 into a frequency of the FR1 band, and converts the converted The frequency of the FR1 band is output to the intermediate frequency sharing block unit 100 .

Meanwhile, the uplink frequency transmitter 340 according to an embodiment of the present invention generally includes an uplink waveguide antenna unit 343, an uplink low noise amplification unit 342, and an uplink bandpass filter unit 341. The signal of the FR1 band transmitted from the existing repeater is converted into a signal of the FR2 band through block conversion through the up frequency conversion block unit 300, and the up frequency transmitter 340 outputs from the up frequency conversion block unit 300 The converted FR2 band signal is sent to a patch antenna or waveguide antenna after filtering and small signal amplification, and then radiated to the outside through the antenna.

An uplink frequency conversion block unit 300 according to an embodiment of the present invention includes an uplink mixer unit 310, an upstream low noise amplification unit 320, and an uplink frequency multiplier 330.

The uplink low noise amplifier 320 amplifies the block-converted FR2 band signal output from the uplink mixer 310 as a small signal.

The uplink frequency multiplier 330 generates a multiplier frequency for transmission using the multiplier reference frequency supplied from the first channel distributor 450 of the local oscillation unit 400, which will be described later, and transmits the multiplied frequency to the uplink mixer 310. print out

The uplink mixer unit 310 converts the transmission multiplication frequency transmitted from the uplink frequency multiplication unit 330 and the frequency of the RF1 band transmitted from the intermediate frequency sharing block unit 100 into a frequency of the FR2 band, and converts the converted The frequency of the FR2 band is output to the upstream bandpass filter unit 341.

As shown in FIG. 3 , the local oscillator 400 according to an embodiment of the present invention can greatly reduce phase noise by locking the frequency over the first and second order.

First, the low noise amplifying unit 410 receives a reference frequency of approximately 10 MHz and amplifies the small signal of the reference frequency of 10 MHz.

The first frequency locking unit 420 consists of a first PLL unit 421 and a crystal voltage regulating oscillation unit 422 and primarily frequency-locks a reference frequency of approximately 10 MHz to a reference frequency of approximately 100 MHz. The first PLL unit 421 primarily fixes the frequency using the reference frequency of 10 MHz output from the low noise amplification unit 410 and the signal output from the crystal voltage adjustment oscillation unit 422 . At this time, the crystal voltage regulating oscillator 422 has good phase noise, but has a disadvantage in that it is difficult to generate ultra-high frequencies. The reference frequency of 100 MHz output from the crystal voltage regulating oscillator 422 is input to the second frequency fixing unit 420 again.

The second frequency locking unit 430 consists of a second PLL unit 431 and a voltage regulation oscillation unit 432 and secondarily frequency-locks an input reference frequency of approximately 100 MHz to a reference frequency of approximately 9.075 GHz. The second PLL unit 431 secondarily fixes the frequency using the reference frequency of approximately 100 MHz output from the crystal voltage regulation oscillation unit 422 and the signal output from the voltage regulation oscillation unit 432 . At this time, the voltage regulation oscillation unit 432 has poor phase noise, but it is easy to generate ultra-high frequency. The fixed frequency of 9.075 GHz output from the voltage regulation oscillation unit 432 is transmitted to and distributed to the distribution unit 440 at the rear end.

An example of the frequency value described above is described for convenience, but the actual frequency value may vary depending on circumstances.

The distribution unit 440 distributes the fixed frequency of 9.075 GHz and transmits it to the first channel distribution unit 450 and the second channel distribution unit 460 respectively.

Since the first channel distribution unit 450 and the second channel distribution unit 460 have the same components, a description of either one will be substituted. The first and second channel distributors 450 and 460 provide local frequencies for multiplication that are provided for transmission and reception of SISO and MIMO, respectively. Therefore, the local frequency for multiplication generated by the first channel distributor 450 is provided to the uplink frequency multiplier 330 and the downlink frequency multiplier 230 shown in FIG. 2, respectively. Although not shown in FIG. 2, MIMO Since there is one additional channel at the same time, the local frequency for multiplication generated by the second channel distributor 460 is provided to each of the up frequency multiplier and the down frequency multiplier (not shown).

The first channel distribution unit 450 roughly includes a first distribution unit 451 , a reception-side low-pass filter unit 452 , and a transmission-side low-pass filter unit 453 .

The first distribution unit 451 distributes the fixed frequency of 9.075 GHz primarily distributed by the distribution unit 440 for transmission and reception. The receiving-side low-pass filter unit 452 and the transmission-side low-pass filter unit 453 filter the fixed frequencies of 9.075 GHz each distributed in the first distribution unit 451 to generate local frequencies for multiplication. Each generated local frequency for multiplication is input to the downlink frequency multiplier 230 and the uplink frequency multiplier 330 of FIG. 2 .

Referring to FIG. 4 attached as described above, in the transmission path, the signal of the FR1 band transmitted from the existing repeater is transmitted along the transmission path by the transmission path switching of the intermediate frequency sharing block unit 100, the uplink frequency conversion block unit ( 300), it is block-converted into a signal of the FR2 band and radiated through the transmit antenna.

And, referring to FIG. 5, during the reception path, the signal of the FR2 band received through the reception antenna is converted into a signal of the FR1 band through block conversion by the downlink frequency conversion block unit 200, and the intermediate frequency sharing block unit ( 100), and the signal converted to the FR1 band by the reception path switching of the intermediate frequency sharing block unit 100 is transmitted to the existing repeater along the reception path. Hereinafter, the intermediate frequency sharing block unit 100 will be described in detail with reference to FIGS. 2, 4, and 5.

Intermediate frequency sharing block unit 100 according to an embodiment of the present invention can share each circuit through RF path switching during transmission and reception, so that effects such as parts reduction, size reduction, and material cost reduction can be expected. there is.

As shown in FIG. 2, the first RF switch unit 110 switches to transmit the signal of the FR1 band transmitted from the repeater to the second RF switch unit 120 during transmission, and during reception, the third RF switch unit The signal transmitted in 150 is switched to be transmitted to the repeater.

The second RF switch unit 120 switches to transmit the signal of the FR1 band transmitted from the first RF switch unit 110 to the low noise amplification unit 130 during transmission, and during reception, the fourth RF switch unit ( 160) switches to transmit the signal of the FR1 band to the low noise amplifier 130.

The low noise amplifying unit 130 amplifies small signals of the FR1 band when receiving or transmitting a signal of the FR1 band.

The attenuator 140 attenuates the amplitude of the small signal amplified by the low noise amplification unit 130 according to the control of a control unit (not shown).

The third RF switch unit 150 switches to transmit the signal of the FR1 band transmitted from the attenuator 140 to the fourth RF switch unit 160 during transmission, and during reception, the transmitted from the attenuator 140 The signal of the FR1 band is switched to be transmitted to the first RF switch unit 110.

The fourth RF switch unit 160 switches to transmit the signal of the FR1 band transmitted from the third RF switch unit 150 to the band pass filter unit 170 during transmission, and during reception, the band pass filter unit 170 Switches to transmit the signal of the FR1 band transmitted from ) to the second RF switch unit 120.

The bandpass filter unit 170 filters the signal of the FR1 band transmitted from the fifth RF switch unit 180 and transmits the filtered signal to the fourth RF switch unit 160 .

The fifth RF switch unit 180 switches the signal of the FR1 band transmitted from the bandpass filter unit 170 to the uplink frequency conversion block unit 300 during transmission, and when receiving, the downlink frequency conversion block unit ( 200) switches to transmit the signal of the FR1 band to the band pass filter unit 170.

The first sharing module unit of the second RF switch unit 120, the low noise amplification unit 130, the attenuation unit 140 and the third RF switch unit 150, the fourth RF switch unit 160, and a band pass filter The second sharing module unit of the unit 170 and the fifth RF switch unit 180 overlaps a transmission path and a reception path during transmission and reception.

The control unit (not shown) may share circuits during transmission and reception by switching the first, second, third, fourth, and fifth RF switch units 110, 120, 150, 160, and 180 according to the sync signal transmitted from the repeater.

In describing the present invention, descriptions of matters obvious to those skilled in the art and those skilled in the art may be omitted, and descriptions of these omitted components (methods) and functions will be sufficiently referred to within the scope that does not depart from the technical spirit of the present invention. You will be able to. In addition, the above-described components of the present invention have been described for convenience of description of the present invention, but components not described herein may be added within a range that does not deviate from the technical spirit of the present invention.

The description of the configuration and function of each part described above has been separately described for convenience of explanation, but any one configuration and function may be implemented by integrating into other components or implemented in more subdivided form, if necessary.

Although the above has been described with reference to one embodiment of the present invention, the present invention is not limited thereto, and various modifications and applications are possible. That is, those skilled in the art will easily understand that many modifications are possible without departing from the gist of the present invention. In addition, when it is determined that the detailed description of known functions and their configurations related to the present invention or the coupling relationship of each component of the present invention may unnecessarily obscure the gist of the present invention, it should be noted that the detailed description is omitted. something to do.

100: intermediate frequency sharing block unit
110: first RF switch unit
120: second RF switch unit
130: low noise amplification unit
140: attenuation unit
150: third RF switch unit
160: fourth RF switch unit
170: band pass filter unit
180: fifth RF switch unit
200: downlink frequency conversion block unit
210: down mixer unit
220: downstream low noise amplification unit
230: downlink frequency distribution unit
240: down frequency receiver
241 Downlink bandpass filter unit (waveguide)
242: downstream low noise amplification unit
243: downward waveguide antenna unit
300: up frequency conversion block unit
310: upstream mixer unit
320: upstream low noise amplification unit
330: upstream frequency distribution unit
340: upstream frequency transmitter
341: up band pass filter unit
342: upstream low noise amplification unit
343: upstream waveguide antenna unit
400: local oscillation part
410: low noise amplification unit
420: first frequency fixing unit
421: first PLL unit
422: crystal voltage regulation oscillation unit
430: second frequency fixing unit
431: second PLL unit
432: voltage regulation oscillation unit
440: distribution unit
450: first channel distribution unit
451: first distribution unit
452: receiving side low-pass filter unit
453: transmission-side low-pass filter unit
460: second channel distribution unit
461: second distribution unit
462: receiving side low-pass filter unit
463: transmission-side low-pass filter unit

Claims (3)

a downlink frequency receiver for receiving a millimeter wave band signal from a receiving antenna;
a down-frequency conversion block unit for down-converting the frequency of the millimeter wave band received from the antenna to an intermediate frequency for reception by a repeater through block conversion;
an up-frequency conversion block unit for up-frequency-converting the intermediate frequency transmitted from the repeater to a frequency of a millimeter wave band through block conversion;
an uplink frequency transmission unit for transmitting the millimeter wave band signal converted through the uplink frequency conversion block unit to a transmission antenna;
an intermediate frequency sharing block unit configured to share an intermediate frequency reception path down-converted by the down-frequency conversion block unit and an intermediate frequency transmission path transmitted from the repeater by path switching through one sharing block;
A transmitter/receiver for a repeater capable of band extension through block conversion, characterized in that it comprises a local oscillation unit generating a local frequency for multiplication through dual frequency locking and providing the local frequency to the down frequency conversion block unit and the up frequency conversion block unit.
According to claim 1,
The downlink frequency conversion block unit,
a downlink low noise amplification unit for amplifying the frequency of the millimeter wave band received from the antenna;
a downlink frequency multiplier that multiplies the local frequency for multiplication provided by the local oscillation unit by a predetermined multiplier and outputs a multiplier frequency for reception;
a downlink mixer unit mixing the multiplication frequency for reception provided by the downlink frequency multiplier unit with the received millimeter wave band frequency and outputting the intermediate frequency for reception by the repeater to the intermediate frequency sharing block unit;
The up frequency conversion block unit,
an uplink frequency multiplier that multiplies the multiplied local frequency provided by the local oscillation unit by a preset multiplier and outputs a multiplied frequency for transmission;
a downlink mixer unit mixing the multiplication frequency for transmission provided by the uplink frequency multiplication unit and the intermediate frequency transmitted from the repeater to output a frequency in the millimeter wave band;
an uplink low noise amplification unit for amplifying the millimeter wave band frequency output from the downlink mixer unit and outputting the amplified frequency to the uplink frequency transmission unit;
The intermediate frequency sharing block unit,
A first RF switch unit for primarily switching a transmission path and a reception path;
A second RF switch unit for secondarily switching a transmission path and a reception path;
A low noise amplification unit for amplifying the signal transmitted from the second RF switch unit;
an attenuation unit attenuating the signal transmitted from the low noise amplification unit;
A third RF switch unit for switching a reception path and a transmission path of the signal transmitted from the attenuation unit ,
A fourth RF switch unit that tertiarily switches a transmission path and a reception path;
A bandpass filter unit for filtering the signal transmitted from the fourth RF switch unit;
A fifth RF switch unit for fourthly switching a transmit path and a receive path,
The first to fifth RF switching units are synchronized to switch between a transmission path and a reception path according to a sync signal provided from the outside.
According to claim 2,
The local oscillation unit,
A low noise amplification unit that receives a reference frequency and amplifies it;
a first frequency fixing unit that receives the reference frequency output from the low noise amplifying unit and firstly fixes the frequency to output a first fixed frequency;
A second frequency fixing unit that receives the first fixed frequency and secondarily fixes the frequency to output a second fixed frequency;
a distribution unit for distributing and outputting the second fixed frequency;
A first channel distributor for redistributing any second fixed frequency output from the distributor and outputting local frequencies for multiplication to the downlink frequency multiplier and the upstream frequency multiplier, respectively;
A transceiver for a repeater capable of band extension through block conversion, characterized in that it comprises a second channel distributor for redistributing another second fixed frequency output from the distributor.

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