CN108390682A - A kind of multiband frequency conversion system based on radio frequency frequency mixing technique - Google Patents

A kind of multiband frequency conversion system based on radio frequency frequency mixing technique Download PDF

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Publication number
CN108390682A
CN108390682A CN201810137778.5A CN201810137778A CN108390682A CN 108390682 A CN108390682 A CN 108390682A CN 201810137778 A CN201810137778 A CN 201810137778A CN 108390682 A CN108390682 A CN 108390682A
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CN
China
Prior art keywords
capacitance
connect
frequency
circuit
frequency conversion
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CN201810137778.5A
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Chinese (zh)
Inventor
刘春良
张森飞
孙海龙
陈永波
陈煜�
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苏州汉明科技有限公司
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Priority to CN201810137778.5A priority Critical patent/CN108390682A/en
Publication of CN108390682A publication Critical patent/CN108390682A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16Multiple-frequency-changing
    • H03D7/165Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B2001/0491Circuits with frequency synthesizers, frequency converters or modulators

Abstract

The invention discloses a kind of multiband frequency conversion systems based on radio frequency frequency mixing technique, including:Sequentially connected filter circuit, radio-frequency switch circuit, frontend amplifying circuit, mixting circuit, signal amplification circuit.Mixting circuit includes frequency conversion chip U10 and the microcontroller U9, the first circuit and the second circuit that are attached thereto, and the first circuit includes inductance L7, inductance L8, resistance R16, capacitance C31, capacitance C32, capacitance C34, capacitance C35;Second circuit includes capacitance C39, capacitance C42, capacitance C44, capacitance C45, inductance L10, and wherein the 23rd foot of frequency conversion chip U10 is connect with capacitance C44, capacitance C45, capacitance C42 successively;The 24th foot of frequency conversion chip U10 is connect with capacitance C39, inductance L10, capacitance C42 successively.The present invention provides a kind of high reliability wireless communications method for broadcasting and TV in 1GHz low-frequency ranges below.

Description

A kind of multiband frequency conversion system based on radio frequency frequency mixing technique

Technical field

The invention belongs to wireless communication techniques, particularly relate to a kind of multiband frequency conversion system based on radio frequency frequency mixing technique System.

Background technology

Traditional WiFi agreements are the wireless communication protocols based on ISM band, and technical maturity is high, and indoor and short distance is answered With extensive.But it is constrained to its high band radiofrequency characteristics, in outdoor or city wireless communications applications, the signal of traditional WiFi is worn Thoroughly, diffraction property and coverage area etc., relative to 1GHz low-band signals below, (such as broadcasting and TV 700MHz exempts from license frequency Section) it is weak very much.

IEEE tissues on the basis of compatible tradition WiFi agreements, are drafted based on broadcasting and TV frequency range (470-790MHz) IEEE802.11af will be applied to the white spectrum space of shared TV;Based on 1GHz or less unlicensed bands, draft IEEE802.11ah will be applied to wisdom power grid and long range WLAN;Currently without any mainstream chip and instrument factory Quotient is practical to put into product development.

Therefore, there is an urgent need for a kind of new technologies of design to improve its problem by the present inventor.

Invention content

In order to solve the above technical problems, the present invention provides a kind of multiband frequency conversion systems based on radio frequency frequency mixing technique.

The technical scheme is that:

A kind of multiband frequency conversion system based on radio frequency frequency mixing technique, including:Sequentially connected filter circuit, RF switch Circuit, frontend amplifying circuit, mixting circuit, signal amplification circuit, wherein the mixting circuit includes frequency conversion chip U10 and therewith Microcontroller U9, the first circuit and the second circuit of connection, wherein first circuit include inductance L7, inductance L8, resistance R16, Capacitance C31, capacitance C32, capacitance C34, capacitance C35;Inductance L7 and resistance R16 is connected in parallel on the 17th of the frequency conversion chip U10 Between foot and the tenth octal;The one end capacitance C32 is connect with the tenth octal of the frequency conversion chip U10, and the other end connects with capacitance C34 It is grounded after connecing;The one end inductance L8 is connect with the 17th foot of the frequency conversion chip U10, and the other end passes through capacitance C31, capacitance successively It is grounded after C35;The second circuit includes capacitance C39, capacitance C42, capacitance C44, capacitance C45, inductance L10, wherein the change The 23rd foot of frequency chip U10 is connect with capacitance C44, capacitance C45, capacitance C42 successively;The second of the frequency conversion chip U10 14 feet are connect with capacitance C39, inductance L10, capacitance C42 successively.

Preferably, the frontend amplifying circuit includes power limiter D1, power limiter D3, filter U5, filter U7, signal amplifier U6, wherein the first foot of the power limiter D1 is connect with the radio-frequency switch circuit, crus secunda and institute State filter U5 connections;The crus secunda of the power limiter D3 is connect with the radio-frequency switch circuit, the first foot and the letter The 4th foot connection of number amplifier U6, the third foot of the signal amplifier U6 are connect with the filter U7.

Preferably, the signal amplification circuit includes filter U11, driving amplifier U12, RF switch U16, interface J2, capacitance C70, capacitance C72, capacitance C96, capacitance C99, inductance L15, crus secunda and the mixting circuit of median filter U11 connect It connects, the 5th foot is connect after capacitance C70, inductance L15 with the third foot of driving amplifier U12, the output of driving amplifier U12 End is connect after capacitance C72, capacitance C96 with RF switch U16, the crus secunda of RF switch U16 after capacitance C99 with connect Mouth J2 connections.

Preferably, the radio-frequency switch circuit includes RF switch U8, capacitance C14, capacitance C18, RF switch U8 second Foot is connect with the filter circuit, and the 4th foot is connect after capacitance C18 with the frontend amplifying circuit, and the 6th foot passes through capacitance It is connect with the frontend amplifying circuit after C14.

Preferably, the filter circuit includes interface J1, capacitance C5, capacitance C7, capacitance C8, filter U1, wherein described The one end capacitance C5 is connect with the interface J1, and the other end is connect with the capacitance C7 and filter U1 respectively, capacitance C7 and capacitance It is grounded after C8 connections.

Preferably, the mixting circuit further includes tertiary circuit, and the tertiary circuit includes inductance L4, inductance L5, resistance R14, capacitance C21, capacitance C22, capacitance C23, capacitance C24;Inductance L4 and resistance R14 are connected in parallel on the of the frequency conversion chip U10 Between 27 feet and the 20th octal;The one end capacitance C22 is connect with the 27th foot of the frequency conversion chip U10, the other end It is grounded after being connect with capacitance C23;The one end inductance L5 is connect with the 20th octal of the frequency conversion chip U10, and the other end passes through successively It is grounded after crossing capacitance C21, capacitance C24.

Preferably, the mixting circuit further includes the 4th circuit, and the 4th circuit includes capacitance C50, capacitance C52, electricity Hold C53, capacitance C54, capacitance C55, inductance L12, inductance L13, wherein one end capacitance C52 and the tenth of the frequency conversion chip U10 Three feet connect, and the other end is connect with capacitance C50 and inductance L12 respectively, and the other end of inductance L12 is connect with capacitance C53;Capacitance The one end C54 is connect with the 14th foot of the frequency conversion chip U10, and the other end is connect with capacitance C55 and inductance L13 respectively, capacitance The other end of C55 is connect with capacitance C53.

Preferably, the frequency conversion chip U10 is RFFC2071 frequency conversion chips.

Preferably, the microcontroller U9 is BL21P01 microcontrollers.

Preferably, the RF switch U8, RF switch U16 are SKY13370-374LF RF switches.

Using above-mentioned technical proposal, the present invention includes at least following advantageous effect:

Multiband frequency conversion system of the present invention based on radio frequency frequency mixing technique is broadcasting and TV in 1GHz low-frequency ranges below (such as 400,500,600,700,800MHZ) provide a kind of high reliability wireless communications method, and frequency spectrum is improved for radio, TV and film industries Utilization rate reduces new agreement and chip development cost and period, Rapid Productization landing and promotes with very strong practical significance. In addition, modularized design and local oscillator (LO) is programmable frequency range:85MHz to 2700MHz, escapable cost and shortening are opened The period is sent out, the demand of more industries can be more satisfied with.

Description of the drawings

Fig. 1 is the structural schematic diagram of the multiband frequency conversion system of the present invention based on radio frequency frequency mixing technique;

Fig. 2 is the circuit diagram of filter circuit of the present invention;

Fig. 3 is the circuit diagram of radio-frequency switch circuit of the present invention and frontend amplifying circuit;

Fig. 4 a are the circuit diagram of mixting circuit of the present invention;

Fig. 4 b are the circuit diagram of the first circuit of the present invention;

Fig. 4 c are the circuit diagram of second circuit of the present invention;

Fig. 4 d are the circuit diagram of tertiary circuit of the present invention;

Fig. 4 e are the circuit diagram of the 4th circuit of the present invention;

Fig. 4 f are the peripheral circuit diagram of mixer of the present invention;

Fig. 5 a are the partial circuit diagram of signal amplification circuit of the present invention;

Fig. 5 b are the partial circuit diagram of signal amplification circuit of the present invention;

Fig. 5 c are the partial circuit diagram of signal amplification circuit of the present invention;

Fig. 5 d are the partial circuit diagram of signal amplification circuit of the present invention.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

As shown in Figures 1 to 5, it to meet a kind of multiband frequency conversion system based on radio frequency frequency mixing technique of the present invention, wraps It includes:Sequentially connected filter circuit, radio-frequency switch circuit, frontend amplifying circuit, mixting circuit, signal amplification circuit, wherein institute It includes frequency conversion chip U10 and the microcontroller U9, the first circuit and the second circuit that are attached thereto to state mixting circuit, wherein described first Circuit includes inductance L7, inductance L8, resistance R16, capacitance C31, capacitance C32, capacitance C34, capacitance C35;Inductance L7 and resistance R16 It is connected in parallel between the 17th foot and the tenth octal of the frequency conversion chip U10;The one end capacitance C32 is with the frequency conversion chip U10's Tenth octal connects, and the other end is grounded after being connect with capacitance C34;17th foot of the one end inductance L8 and the frequency conversion chip U10 Connection, the other end are grounded after capacitance C31, capacitance C35 successively;The second circuit includes capacitance C39, capacitance C42, capacitance C44, capacitance C45, inductance L10, wherein the 23rd foot of the frequency conversion chip U10 successively with capacitance C44, capacitance C45, capacitance C42 connections;The 24th foot of the frequency conversion chip U10 is connect with capacitance C39, inductance L10, capacitance C42 successively.

Preferably, the frontend amplifying circuit includes power limiter D1, power limiter D3, filter U5, filter U7, signal amplifier U6, wherein the first foot of the power limiter D1 is connect with the radio-frequency switch circuit, crus secunda and institute State filter U5 connections;The crus secunda of the power limiter D3 is connect with the radio-frequency switch circuit, the first foot and the letter The 4th foot connection of number amplifier U6, the third foot of the signal amplifier U6 are connect with the filter U7.

Preferably, the signal amplification circuit includes filter U11, driving amplifier U12, RF switch U16, interface J2, capacitance C70, capacitance C72, capacitance C96, capacitance C99, inductance L15, crus secunda and the mixting circuit of median filter U11 connect It connects, the 5th foot is connect after capacitance C70, inductance L15 with the third foot of driving amplifier U12, the output of driving amplifier U12 End is connect after capacitance C72, capacitance C96 with RF switch U16, the crus secunda of RF switch U16 after capacitance C99 with connect Mouth J2 connections.

The signal amplification circuit further include filter U15, power limiter D4, driving amplifier U14, filter U13, Capacitance C82, capacitance C83, capacitance C84, capacitance C97;The 4th foot of RF switch U16 by after capacitance C98, capacitance C97 with filter The U13 connections of wave device, the 5th foot of filter U13 are connect with driving amplifier U14, and the tenth foot of driving amplifier U14 is by electricity Hold C83, connect with the first foot of power limiter D4 after capacitance C84, the of the crus secunda of power limiter D4 and filter U15 Two feet connect.

Preferably, the radio-frequency switch circuit includes RF switch U8, capacitance C14, capacitance C18, RF switch U8 second Foot is connect with the filter circuit, and the 4th foot is connect after capacitance C18 with the frontend amplifying circuit, and the 6th foot passes through capacitance It is connect with the frontend amplifying circuit after C14.

Preferably, the filter circuit includes interface J1, capacitance C5, capacitance C7, capacitance C8, filter U1, wherein described The one end capacitance C5 is connect with the interface J1, and the other end is connect with the capacitance C7 and filter U1 respectively, capacitance C7 and capacitance It is grounded after C8 connections.

Preferably, the mixting circuit further includes tertiary circuit, and the tertiary circuit includes inductance L4, inductance L5, resistance R14, capacitance C21, capacitance C22, capacitance C23, capacitance C24;Inductance L4 and resistance R14 are connected in parallel on the of the frequency conversion chip U10 Between 27 feet and the 20th octal;The one end capacitance C22 is connect with the 27th foot of the frequency conversion chip U10, the other end It is grounded after being connect with capacitance C23;The one end inductance L5 is connect with the 20th octal of the frequency conversion chip U10, and the other end passes through successively It is grounded after crossing capacitance C21, capacitance C24.

Preferably, the mixting circuit further includes the 4th circuit, and the 4th circuit includes capacitance C50, capacitance C52, electricity Hold C53, capacitance C54, capacitance C55, inductance L12, inductance L13, wherein one end capacitance C52 and the tenth of the frequency conversion chip U10 Three feet connect, and the other end is connect with capacitance C50 and inductance L12 respectively, and the other end of inductance L12 is connect with capacitance C53;Capacitance The one end C54 is connect with the 14th foot of the frequency conversion chip U10, and the other end is connect with capacitance C55 and inductance L13 respectively, capacitance The other end of C55 is connect with capacitance C53.

Preferably, the frequency conversion chip U10 is RFFC2071 frequency conversion chips.

Preferably, the microcontroller U9 is BL21P01 microcontrollers.

Preferably, the RF switch U8, RF switch U16 are SKY13370-374LF RF switches.

The operation principle of the present invention is:The transmitting signal of WIFI passes through U1 filters from J1 inputs, arrives U8 RF switches, When being operated in TX emission modes, signal is output to D1 power limiters from the ports RF2 of U8, then passes through U5 filters and inputs To U10 frequency conversion chips, be converted into 1GHz low-frequency ranges below (such as 700MHz) signal, 1GHz low-band signals below out into Enter U12 signal amplifiers, signal is amplified into U16 RF switches, and J2 interfaces are output to finally by the RFC pins of U16, complete At entire conversion process.

Specifically, radiofrequency signal conditioning design is to use bandpass filter, the switching of TX/RX signals, power limit Width device and Balun designs, improve respectively high frequency 2.4G signals and 1GHz low-frequency ranges below (such as 400,500,600,700, 800MHZ) signal;Filter is the band for inhibiting 2.4G and 1GHz low-frequency ranges below (such as 400,500,600,700,800MHZ) External signal;The switching of TX/RX signals is to make RF switch using the SKY13370-374LF of Skyworks, is amplified using signal demodulator Technology generates the control signal of RF switch, and controls switching signal delay and be less than 1.5us, is passed to WiFi signal to realize The defeated lossless frequency conversion of wireless semiduplex mode;Power limiter be limitation 2.4G and 1GHz low-frequency ranges below (such as 400,500, 600,700,800MHZ) amplitude makes its size meet the input range of rear class frequency mixer;Balun designs are to penetrate single-ended Frequency signal is converted to both-end radiofrequency signal, into rear class mixting circuit;Refer to detailed circuit diagram.

The mixting circuit design is to select the binary channels lock-in mixer RFFC2071 (being internally integrated VCO) of Qorvo The VCO and PLL that RFFC2071 is controlled with programmable MCU generate the LO signals of 1700MHz, wireless to the 2.4GHz by conditioning Signal is mixed, one of channel the WiFi TX signals of 2.4GHz downconvert to 1GHz low-frequency ranges below (such as 400, 500,600,700,800MHZ) TX signals, another channel 1GHz low-frequency ranges below (such as 400,500,600,700, RX signals up-conversion 800MHZ) to 2.4GHz frequency ranges RX signals;Wherein LO signals are to realize LO by being programmed to MCU It is adjustable, and then the same radiofrequency signal of output, such as 900MHz can be adjusted.

The RFPA3805 that signal TX, RX amplifying circuit implementation method contains Qorvo does the amplification of PA signals, uses The SKY67105-306LF of Skyworks does the circuit design of LNA signals amplification, uses the SKY13370-374LF of Skyworks RF switch is made, realizes that TX exports 1 watt, the wireless specification of 700MHz frequency ranges of RX gains 38dB, the PA and LNA of use have input The advantages that frequency range is wide, increase.

WiFi is a kind of wireless communication technique of high-throughput, if frequency reducing applies to the 1GHz low frequencies below of broadcasting and TV Section, can be good at improving traditional WiFi in the penetrating of ISM band, cover and problem that diffracting power is weak, can effectively change The kind signal hardly possible through walls pain spot close with coverage distance.

The present invention provides for broadcasting and TV in 1GHz low-frequency ranges below (such as 400,500,600,700,800MHZ) a kind of high Reliability wireless communication method, the availability of frequency spectrum is improved for radio, TV and film industries, reduce new agreement and chip development cost and the period, Rapid Productization, which is landed and promoted, has very strong practical significance.

In addition, modularized design and local oscillator (LO) is programmable frequency range:85MHz to 2700MHz, escapable cost With the shortening development cycle, it can more be satisfied with the demand of more industries.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest range caused.

Claims (10)

1. a kind of multiband frequency conversion system based on radio frequency frequency mixing technique, which is characterized in that including:Sequentially connected filtered electrical Road, radio-frequency switch circuit, frontend amplifying circuit, mixting circuit, signal amplification circuit, wherein the mixting circuit includes frequency conversion core Piece U10 and microcontroller U9, the first circuit and the second circuit being attached thereto, wherein first circuit includes inductance L7, inductance L8, resistance R16, capacitance C31, capacitance C32, capacitance C34, capacitance C35;Inductance L7 and resistance R16 is connected in parallel on the frequency conversion chip Between the 17th foot of U10 and the tenth octal;The one end capacitance C32 is connect with the tenth octal of the frequency conversion chip U10, the other end It is grounded after being connect with capacitance C34;The one end inductance L8 is connect with the 17th foot of the frequency conversion chip U10, and the other end passes through successively It is grounded after capacitance C31, capacitance C35;The second circuit includes capacitance C39, capacitance C42, capacitance C44, capacitance C45, inductance L10, wherein the 23rd foot of the frequency conversion chip U10 is connect with capacitance C44, capacitance C45, capacitance C42 successively;The frequency conversion The 24th foot of chip U10 is connect with capacitance C39, inductance L10, capacitance C42 successively.
2. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 1, it is characterised in that:It puts the front end Big circuit includes power limiter D1, power limiter D3, filter U5, filter U7, signal amplifier U6, wherein the work( The first foot of rate limiter D1 is connect with the radio-frequency switch circuit, and crus secunda is connect with the filter U5;The power limit The crus secunda of width device D3 is connect with the radio-frequency switch circuit, and the first foot is connect with the 4th foot of the signal amplifier U6, institute The third foot for stating signal amplifier U6 is connect with the filter U7.
3. the multiband frequency conversion system based on radio frequency frequency mixing technique as claimed in claim 1 or 2, it is characterised in that:The letter Number amplifying circuit includes filter U11, driving amplifier U12, RF switch U16, interface J2, capacitance C70, capacitance C72, capacitance C96, capacitance C99, inductance L15, the crus secunda of median filter U11 are connect with mixting circuit, and the 5th foot is by capacitance C70, electricity It is connect with the third foot of driving amplifier U12 after sense L15, the output end of driving amplifier U12 is after capacitance C72, capacitance C96 It is connect with RF switch U16, the crus secunda of RF switch U16 is connect after capacitance C99 with interface J2.
4. the multiband frequency conversion system as described in any one of claims 1-3 based on radio frequency frequency mixing technique, it is characterised in that:It is described Radio-frequency switch circuit includes RF switch U8, capacitance C14, capacitance C18, and RF switch U8 crus secundas connect with the filter circuit It connects, the 4th foot is connect after capacitance C18 with the frontend amplifying circuit, and the 6th foot is put after capacitance C14 with the front end Big circuit connection.
5. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 1-4 is any, it is characterised in that:It is described Filter circuit includes interface J1, capacitance C5, capacitance C7, capacitance C8, filter U1, wherein the one end the capacitance C5 and the interface J1 connections, the other end are connect with the capacitance C7 and filter U1 respectively, and capacitance C7 is grounded after being connect with capacitance C8.
6. the multiband frequency conversion system according to any one of claims 1 to 5 based on radio frequency frequency mixing technique, it is characterised in that:It is described Mixting circuit further includes tertiary circuit, the tertiary circuit include inductance L4, inductance L5, resistance R14, capacitance C21, capacitance C22, Capacitance C23, capacitance C24;Inductance L4 and resistance R14 is connected in parallel on the 27th foot and the 20th octal of the frequency conversion chip U10 Between;The one end capacitance C22 is connect with the 27th foot of the frequency conversion chip U10, and the other end is grounded after being connect with capacitance C23; The one end inductance L5 is connect with the 20th octal of the frequency conversion chip U10, and the other end is followed by by capacitance C21, capacitance C24 successively Ground.
7. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 1-6 is any, it is characterised in that:It is described Mixting circuit further includes the 4th circuit, and the 4th circuit includes capacitance C50, capacitance C52, capacitance C53, capacitance C54, capacitance C55, inductance L12, inductance L13, the wherein one end capacitance C52 are connect with the 13rd foot of the frequency conversion chip U10, other end difference It is connect with capacitance C50 and inductance L12, the other end of inductance L12 is connect with capacitance C53;The one end capacitance C54 and the frequency conversion chip The 14th foot of U10 connects, and the other end is connect with capacitance C55 and inductance L13 respectively, and the other end and the capacitance C53 of capacitance C55 connect It connects.
8. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 1-7 is any, it is characterised in that:It is described Frequency conversion chip U10 is RFFC2071 frequency conversion chips.
9. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 1-8 is any, it is characterised in that:It is described Microcontroller U9 is BL21P01 microcontrollers.
10. the multiband frequency conversion system based on radio frequency frequency mixing technique as described in claim 3 or 4, it is characterised in that:It is described to penetrate Frequency switch U8, RF switch U16 are SKY13370-374LF RF switches.
CN201810137778.5A 2018-02-10 2018-02-10 A kind of multiband frequency conversion system based on radio frequency frequency mixing technique CN108390682A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1934795A (en) * 2004-03-22 2007-03-21 希尔拉单块集成电路公司 Multi-channel filtering system for transceiver architectures
CN101064522A (en) * 2006-04-24 2007-10-31 中兴通讯股份有限公司 Multifunctional transceiver for time division duplexing system
CN101534133A (en) * 2008-03-10 2009-09-16 中国移动通信集团公司 Wireless transceiver
CN203691643U (en) * 2014-01-22 2014-07-02 江苏杰瑞科技集团有限责任公司 WiMAX wireless client device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1934795A (en) * 2004-03-22 2007-03-21 希尔拉单块集成电路公司 Multi-channel filtering system for transceiver architectures
CN101064522A (en) * 2006-04-24 2007-10-31 中兴通讯股份有限公司 Multifunctional transceiver for time division duplexing system
CN101534133A (en) * 2008-03-10 2009-09-16 中国移动通信集团公司 Wireless transceiver
CN203691643U (en) * 2014-01-22 2014-07-02 江苏杰瑞科技集团有限责任公司 WiMAX wireless client device

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