CN103227658A - Radio-frequency circuit - Google Patents
Radio-frequency circuit Download PDFInfo
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- CN103227658A CN103227658A CN2013101410808A CN201310141080A CN103227658A CN 103227658 A CN103227658 A CN 103227658A CN 2013101410808 A CN2013101410808 A CN 2013101410808A CN 201310141080 A CN201310141080 A CN 201310141080A CN 103227658 A CN103227658 A CN 103227658A
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Abstract
The invention provides a radio-frequency circuit which comprises a 2GHz transceiver circuit and a 5GHz transceiver circuit, wherein the 5GHz transceiver circuit comprises a 5G receiving branch and a 5G transmitting branch; the 5G receiving branch comprises a 5G low-noise amplifier; the 5G transmitting branch comprises a 5G power amplifier; the 5G low-noise amplifier and the 5G power amplifier are connected with a 5G antenna respectively by a 5G antenna changeover switch; and a 5G high-pass filter is arranged between the 5G antenna and the 5G low-noise amplifier on the 5G receiving branch. According to the radio-frequency circuit, a method of adding the 5G high-pass filter to a 5G transceiver module adopting 802.11ac (alternating current) is provided for hidden dangers resulting in receptivity reduction in the current double-frequency 802.11ac product, so that the problem of the receptivity reduction of the 5G circuit is solved.
Description
Technical field
The present invention relates to radio circuit, particularly a kind of radio circuit of 802.11AC product of the radio circuit with 2.4GHz frequency range and 5GHz frequency range.
Background technology
Current, the Wi-Fi technical standard based on IEEE 802.11 series of international mainstream, before 802.11ac, Wi-Fi Alliance was released four generation Wi-Fi technical standards altogether, was respectively these four kinds of standards of 802.11a, 802.11b, 802.11g and 802.11n.In January, 2012, Wi-Fi Alliance was issued the 5th generation standard 802.11ac draft 2.0 standards.802.11ac(hereinafter to be referred as 11ac) technology operates mainly in the 5G frequency range, and this technology has been integrated the multiplexing and carrier aggregation technology of orthogonal frequency (OFDM), supports 20MHz, 40MHz, 80MHz and 160MHz channel width scheme, theoretical speed have surpassed 1Gbps.
Since the radio throughput of 11ac technology and coverage effect than before technology obviously improve, present numerous chip producer is the chip of development support 11ac competitively.Each communication electronics brand manufacturers has also released the electronic product of supporting 11ac successively.
According to 802.11n convention in the past, before the formal issue of 802.11ac standard, manufacturer can release some initial productions according to draft standard, and after the formal issue of standard, the 11ac product will be extensive commercial, will progressively substitute the 802.11a/n that is operated in the 5GHz frequency range.Because 802.11n can also be operated in the 2.4GHz frequency range, therefore can be not alternative fully by 802.11ac, the two will coexist in long period of time.Therefore, in following a period of time, support 11n, the double frequency product of 2.4GHz and 11ac is an important product form.And this product form has also just just stepped into the commercial starting stage.
Be illustrated in figure 1 as the radio circuit of present widely used 802.11AC product, reception transtation mission circuit with 5GHz and two frequency ranges of 2.4GHz, wherein the reception transtation mission circuit of 5GHz frequency range comprises low noise amplifier, the 5GHz power amplifier in the transtation mission circuit and the 5GHz low pass circuit that has in 5G reception antenna, reception/transmission change over switch, the receiving circuit, its receiving circuit is exactly 5GHz reception antenna, 5GHz low noise amplifier, and transtation mission circuit is exactly power amplifier and low pass filter, outwards launches by antenna then.
2.4GHz the RF circuit of frequency range equally also is to comprise the reception transtation mission circuit, circuit structure is identical with the reception transtation mission circuit of 5GHz frequency range.Receiving circuit comprises that reception sends shared 2.4GHz antenna and the low noise amplifier of 2.4GHz, and transtation mission circuit comprises the 2.4GHz power amplifier, the low pass filter of 2.4GHz, and send the shared antenna of reception.
Above sort circuit framework has a hidden danger, and the receiving circuit end of 5GHz is subjected to the interference of 2GHz transmitting terminal easily.The 5GHz circuit is when receiving, and 2GHzG can be operated in emission state, and the 5GHz low noise amplifier is also more intense to the amplifying power of 2GHz signal.If the 2GHz circuit working is at emission state, and the 5GHz circuit working is in accepting state, and this time, the low noise amplifier of 5GHz may enter saturation condition, thereby caused 5GHz receptivity variation.This phenomenon is particularly smaller in small product size, and when just 5G Hz antenna and 2GHz antenna suffered closerly, the phenomenon of 5GHz decreased performance was more obvious.The product that present industry is commercial, small product size is very big basically, and this problem is temporarily so not serious.But along with the miniaturization development of product, this problem can highlight at once.
Summary of the invention
The objective of the invention is to overcome in 802.11AC, the receiving circuit end of 5GHz is subjected to the interference of 2GHz transmitting terminal easily, and a kind of radio circuit is provided.
Technical scheme of the present invention is: a kind of radio circuit, comprise 2GHz transmission circuit and 5GHz transmission circuit, described 5GHz transmission circuit comprises 5G receiving branch and 5G transmitting branch, described 5G receiving branch comprises the 5G low noise amplifier, the 5G transmitting branch comprises the 5G power amplifier, and the 5G low noise amplifier utilizes the 5G antenna change-over switch to link to each other with the 5G antenna respectively with the 5G power amplifier; Between 5G antenna on the 5G receiving branch and 5G low noise amplifier, be provided with the 5G high pass filter.
Further, in the above-mentioned radio circuit: described 5G high pass filter is arranged between 5G low noise amplifier and the 5G diverter switch.
Further, in the above-mentioned radio circuit: described 5G high pass filter is arranged between 5G antenna and the 5G diverter switch.
Further, in the above-mentioned radio circuit: in the described 5GHz transmission circuit, 5G low noise amplifier, 5G power amplifier, the 5G antenna change-over switch is formed the 5G front-end module.
Further, in the above-mentioned radio circuit: also comprise the 5G low pass filter in the described 5G transmitting branch, described 5G low pass filter is arranged between 5G power amplifier and the 5G antenna change-over switch.
The present invention is directed to the hidden danger that causes receptivity to descend in the current double frequency 802.11ac product, increase 5G high pass filter method in the 5G transceiver module of proposition employing 802.11ac, solved the problem that this 5G circuit receptivity descends.
Below by specific embodiments and the drawings the present invention is carried out at length description.
Description of drawings
Fig. 1 is the radio circuit theory diagram of present 802.11AC product.
Fig. 2 is the embodiment of the invention one a radio circuit theory diagram.
Fig. 3 is a 5GFEM theory diagram of the present invention.
Fig. 4 is the embodiment of the invention two radio circuit theory diagrams.
Embodiment
Embodiment 1, and as shown in Figure 2, present embodiment is a kind of radio circuit based on 802.11AC, and the radio circuit of present embodiment is compared with Fig. 1 prior art, and present embodiment is provided with a 5G high pass filter between 5G low noise amplifier and 5G diverter switch.
In the radio circuit in the present embodiment, comprise two groups of separate transmission circuits of 2GHz transmission circuit and 5GHz transmission circuit, wherein: the 5GHz transmission circuit comprises 5G receiving branch and 5G transmitting branch, the 5G receiving branch comprises the 5G low noise amplifier, the 5G transmitting branch comprises the 5G power amplifier, and the 5G low noise amplifier utilizes the 5G antenna change-over switch to link to each other with the 5G antenna respectively; Between 5G duplexer on the 5G receiving branch and 5G low noise amplifier, be provided with the 5G high pass filter.
Same 2G transmission circuit also is 2G receiving circuit and 2G transtation mission circuit, two shared 2G antennas of circuit, switch by the 2G antenna change-over switch, when sending, after passing through the low pass filter output of 2G again after the power amplifier amplification through 2G after signal is exported from the transmit port of host circuit board, the 2G antenna change-over switch switches to transmit status, signal after amplifying is gone out from the 2G antenna transmission, after the 2G antenna receives signal, pass through the LNA low noise amplifier to the receiving terminal at the low noise amplifier place of 2G and be amplified into receiving circuit and carry out other operation to cross the 2G duplexer.When 2G sends and since behind the 5G antenna through the high pass filter of 5G the part of the part of lower frequency such as 2.4G is filtered, can be to the low noise amplifier influence of 5G.
Claims (5)
1. radio circuit, comprise 2.4GHz transmission circuit and 5GHz transmission circuit, described 5GHz transmission circuit comprises 5G receiving branch and 5G transmitting branch, described 5G receiving branch comprises the 5G low noise amplifier, the 5G transmitting branch comprises the 5G power amplifier, and the 5G low noise amplifier utilizes the 5G antenna change-over switch to link to each other with the 5G antenna respectively with the 5G power amplifier; It is characterized in that: between 5G antenna on the 5G receiving branch and 5G low noise amplifier, be provided with the 5G high pass filter.
2. radio circuit according to claim 1 is characterized in that: described 5G high pass filter is arranged between 5G low noise amplifier and the 5G diverter switch.
3. radio circuit according to claim 1 is characterized in that: described 5G high pass filter is arranged between 5G antenna and the 5G diverter switch.
4. radio circuit according to claim 3 is characterized in that: in the described 5GHz transmission circuit, and 5G low noise amplifier, 5G power amplifier, the 5G antenna change-over switch is formed the 5G front-end module.
5. radio circuit according to claim 1 is characterized in that: also comprise the 5G low pass filter in the described 5G transmitting branch, described 5G low pass filter is arranged between 5G power amplifier and the 5G antenna change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101410808A CN103227658A (en) | 2013-04-23 | 2013-04-23 | Radio-frequency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101410808A CN103227658A (en) | 2013-04-23 | 2013-04-23 | Radio-frequency circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN103227658A true CN103227658A (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2013101410808A Pending CN103227658A (en) | 2013-04-23 | 2013-04-23 | Radio-frequency circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553505A (en) * | 2015-06-29 | 2016-05-04 | 宇龙计算机通信科技(深圳)有限公司 | Carrier aggregation radio-frequency circuit and communication terminal |
| CN105656610A (en) * | 2015-12-30 | 2016-06-08 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency circuit and terminal for realizing carrier aggregation |
| CN106301461A (en) * | 2016-07-29 | 2017-01-04 | 广东欧珀移动通信有限公司 | The radio circuit of a kind of carrier aggregation and mobile terminal |
| CN108429554A (en) * | 2018-03-28 | 2018-08-21 | 深圳市共进电子股份有限公司 | 5G signal transmitting and receivings circuit, method, apparatus, router and the medium of router |
| CN108471565A (en) * | 2018-03-21 | 2018-08-31 | 春秋航空技术发展江苏有限公司 | Ground wireless headphone system |
| CN109617558A (en) * | 2014-04-12 | 2019-04-12 | 天工方案公司 | Architecture and method relevant to double letter improved isolation in device path |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232585A (en) * | 2007-01-22 | 2008-07-30 | 汤姆森许可贸易公司 | Terminal and method for the simultaneous transmission of video and high-speed data |
| CN101917219A (en) * | 2010-08-17 | 2010-12-15 | 华为终端有限公司 | Antenna multiplexing method, device and wireless terminal |
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2013
- 2013-04-23 CN CN2013101410808A patent/CN103227658A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232585A (en) * | 2007-01-22 | 2008-07-30 | 汤姆森许可贸易公司 | Terminal and method for the simultaneous transmission of video and high-speed data |
| CN101917219A (en) * | 2010-08-17 | 2010-12-15 | 华为终端有限公司 | Antenna multiplexing method, device and wireless terminal |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617558A (en) * | 2014-04-12 | 2019-04-12 | 天工方案公司 | Architecture and method relevant to double letter improved isolation in device path |
| CN105553505A (en) * | 2015-06-29 | 2016-05-04 | 宇龙计算机通信科技(深圳)有限公司 | Carrier aggregation radio-frequency circuit and communication terminal |
| CN105553505B (en) * | 2015-06-29 | 2018-10-26 | 宇龙计算机通信科技(深圳)有限公司 | Carrier wave polymerize radio circuit and communication terminal |
| CN105656610A (en) * | 2015-12-30 | 2016-06-08 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency circuit and terminal for realizing carrier aggregation |
| CN105656610B (en) * | 2015-12-30 | 2019-02-01 | 宇龙计算机通信科技(深圳)有限公司 | Realize the radio circuit and terminal of carrier wave polymerization |
| CN106301461A (en) * | 2016-07-29 | 2017-01-04 | 广东欧珀移动通信有限公司 | The radio circuit of a kind of carrier aggregation and mobile terminal |
| CN106301461B (en) * | 2016-07-29 | 2018-09-21 | 广东欧珀移动通信有限公司 | A kind of radio circuit and mobile terminal of carrier wave polymerization |
| CN108471565A (en) * | 2018-03-21 | 2018-08-31 | 春秋航空技术发展江苏有限公司 | Ground wireless headphone system |
| CN108429554A (en) * | 2018-03-28 | 2018-08-21 | 深圳市共进电子股份有限公司 | 5G signal transmitting and receivings circuit, method, apparatus, router and the medium of router |
| CN108429554B (en) * | 2018-03-28 | 2024-06-04 | 深圳市共进电子股份有限公司 | 5G signal receiving and transmitting circuit, method and device of router, router and medium |
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Application publication date: 20130731 |