CN114006180A - Dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirement - Google Patents
Dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirement Download PDFInfo
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- CN114006180A CN114006180A CN202110219906.2A CN202110219906A CN114006180A CN 114006180 A CN114006180 A CN 114006180A CN 202110219906 A CN202110219906 A CN 202110219906A CN 114006180 A CN114006180 A CN 114006180A
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- beidou
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/32—Multimode operation in a single same satellite system, e.g. GPS L1/L2
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements, which comprises a receiving link, a transmitting link and a power supply control unit, wherein the receiving link is designed into a dielectric filter, an amplitude limiter and an amplifier, and a subsequent link is designed conventionally; the receiving link is sequentially designed into a radio frequency switch U15, an amplitude limiter U19, an amplifier U16 and an acoustic surface filter U20, and the subsequent link is designed conventionally; the power supply control unit adopts DC/DC power supply processing; the invention solves the problem of electromagnetic compatibility of the Beidou third-generation navigation system terminal, and the electromagnetic compatibility of the Beidou position report short message type terminal becomes a development difficulty due to the fact that the frequency and bandwidth of the B1 frequency point of the navigation system is adjusted on the basis of the Beidou second generation.
Description
Technical Field
The invention belongs to the field of antennas, and particularly relates to a dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements.
Background
With the third generation of Beidou global networking, a Beidou navigation satellite system is applied globally, Beidou navigation can be rapidly developed no matter in the military field or the civil field and the fusion of big data, a Beidou navigation terminal and other communication systems exist simultaneously, the Beidou terminal is characterized in that the all-weather global function of short messages is provided, and the information of the terminal can be forwarded to other systems. The Beidou terminal packs information to be forwarded and sends the information in a Beidou short message form, the Beidou third-generation antenna amplifies signals to certain power to realize communication with a satellite, the Beidou third-generation antenna is designed to be an AB type amplifier for improving efficiency, stray and harmonic waves can be generated during transmission, and the stray and harmonic signals radiated by the Beidou third-generation antenna are better as small as possible to ensure normal work of other communication systems; position time information is obtained through a B1 frequency point in the Beidou navigation system, the Beidou third-generation satellite navigation system adopts BOC modulation, the working frequency is 1575.42MHz, the bandwidth of 33MHz is reduced, and the space between the working frequency and the emission frequency point 1615MHz is reduced, so that the electromagnetic compatibility problem is more remarkable.
Disclosure of Invention
A dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements comprises a receiving link, a transmitting link and a power supply control unit, wherein the receiving link comprises a radio frequency switch U15, a pin RF1 of the radio frequency switch U15 is connected with an input end of an amplitude limiter U19 through a capacitor C51, an output end of the amplitude limiter U19 is connected with a capacitor C70, a capacitor C71 and an inductor L13 in series, the other end of the inductor L13 is connected with an RFIN end of a low noise amplifier U16, an RFOUT/Vdd of the low noise amplifier U16 is connected with an input end of an acoustic meter filter U20 through a capacitor C72 and a capacitor C73 in series, and an OUT port of the acoustic meter filter U20 is connected to a BL _1 link through a capacitor C74; the transmitting chain comprises a temperature compensator U38, the output end of the temperature compensator U38 is connected with an amplifier U35 through a capacitor C191, the amplifier U35 is connected with a sound meter filter U36 through a capacitor and pi-type attenuation, the output end of the sound meter filter U36 is connected with the grid electrode of an N-channel type MOS tube U39 through a capacitor C194, the drain electrode of the MOS tube U39 is connected with the grid electrode of an LDMOS tube through a capacitor, and the drain electrode of the LDMOS tube is connected with an isolator U32 through a capacitor; the power control unit comprises an operational amplifier U43, the output end of the operational amplifier U43 is respectively connected with the grid electrode of an MOS tube D6 and the base electrode of a triode U42, the emitting electrode of the triode U42 is connected with the base electrode of a triode D1, and the triode D1 is connected with the MOS tube D7 in a common-set mode.
The technical scheme of the invention is further improved as follows: the RFC pin of the radio-frequency switch U15 is connected with a capacitor C68, two control pins of the radio-frequency switch U15 are respectively and electrically connected with two power supplies of Vcc and Vcc-EN, and the pin RF2 of the radio-frequency switch U15 is electrically connected with one end of the capacitor C163.
The technical scheme of the invention is further improved as follows: the other end of the capacitor C163 is electrically connected to one end of the R20 power resistor, and the other end of the power resistor R20 is electrically connected to ground.
The technical scheme of the invention is further improved as follows: the output end of the limiter U19 is grounded through an inductor L24, and the capacitor C71 and the inductor L13 are connected in common to a capacitor C83 which is grounded.
The technical scheme of the invention is further improved as follows: the temperature compensator U38 model is STC0603N9, the amplifier U35 model is YGA602020, the sound table filter U36 model is SF9074, the MOS tube U39 model is MW6S004NT1, the LDMOS tube model is MW1602, and the isolator U32 model is SHI 3018L-4.
The technical scheme of the invention is further improved as follows: the + IN end of the operational amplifier U43 realizes voltage sampling of VCC _ IN through voltage division, the operational amplifier U43-IN end is connected with a relatively stable power supply VCC-5V, the V + end of the operational amplifier U43 is connected with VCC-5V, and the V-end of the operational amplifier U43 is grounded.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the link adopts a radio frequency switch to realize the function of switching the working state of the transmitting and receiving link at the moment, thereby realizing the function that the space signal of the transmitting and receiving link has no newly added stray and harmonic except the working frequency, the amplitude limiter of the receiving link is arranged between the medium filter and the low-noise amplifier tube, the anti-burning protection and the electromagnetic compatibility of the low-noise amplifier are realized, the power supply control is realized by the combination of the triode, the diode and the MOS tube, and the cost performance of the product is improved.
Drawings
FIG. 1 is a cross-sectional view of an antenna of the present invention;
FIG. 2 is a partial schematic diagram of a transmit chain front section;
FIG. 3 is a partial schematic diagram of a transmit chain front section;
FIG. 4 is a schematic diagram of a receive chain;
fig. 5 is a schematic diagram of a power control unit.
Detailed Description
As shown in fig. 1, the big dipper third generation antenna is an integrated machine matching antenna, and mainly comprises a radio frequency module, a passive antenna and a structure, wherein the antenna housing is made of glass fiber reinforced plastic, so that the mechanical strength of the antenna is improved, the structure related to the big dipper third generation antenna is processed and manufactured by adopting duralumin 5a06, the passive antenna adopts a composite medium as a base material, multi-frequency points are realized in a laminated form, and the antenna adopts a radio frequency coaxial connector in an MCX form to be electrically connected with the active module; the active module adopts the design of two-layer chamber, and one side is the receiving link, and other one side is transmission link and power processing unit, and cavity filter divides the chamber design alone, for reducing the suppression of higher harmonic, and the interval is 0.1mm between wave filter and the printed board, compact design, and wherein active module includes transmission link, receiving link and power control unit.
The transmitting chain circuit of the transmitting chain as shown in fig. 2 is designed that L _ in is electrically connected to the input end of a temperature compensator U38 with model number STC0603N9 through a coupling capacitor C188 and pi-type attenuation, the output end is electrically connected to the input end of an amplifier U35 with model number YGA602020 through a coupling capacitor, and the output end is electrically connected to the power supply 5V-L of the power amplifier through a wire-wound inductor L28 and a filter capacitor group, wherein the filter capacitor group is respectively connected to the capacitors C166, C164 and C160 in parallel and grounded, while the output end is electrically connected to one end of a C186 coupling capacitor through a coupling capacitor C185 and pi-type attenuation composed of resistors R70, R66 and R68, the other end is electrically connected to the input end of a 9074 acoustic meter filter U36, the other pin of the acoustic meter filter U36 is grounded, the output end of the acoustic meter filter U36 is electrically connected to the gate of a MOS tube U39 with model MW through a coupling capacitor C187 and a gate MW 3873742, wherein U39 is NT 6S004, the gate NT 6S004 is connected to the gate of the MW, and parallel filter capacitors C195 and C196, a series resistor R86 is electrically connected to a power amplifier 5V-L, a resistor R86 is used for realizing voltage division through a parallel resistor R85 and a resistor R84 to provide a static working point for a MOS tube U39, the drain electrode of the MOS tube U39 is electrically connected to one end of a hollow inductor L27 through a 1/4 wavelength line and parallel capacitors C157 and C161, the other end of the hollow inductor L27 is connected in parallel with filter capacitors C203 and C204 and is electrically connected to a 28V power supply network, meanwhile, the drain electrode of the MOS tube U39 is electrically connected to the gate of a high-power radio frequency LDMOS tube D3 with the model MW1602 through a coupling capacitor C167 and C168 parallel resistor R63 and a capacitor C169, the gate is connected with capacitors C179, C180 and C181 in parallel, the gate voltage of the LDMOS tube D3 is connected with a power amplifier 5V-L through a resistor R81, an LDMOS resistor R82, a resistor R83 and a diode D6 to provide a proper gate voltage, and a proper gate voltage is connected with a gate 64 through a parallel capacitor C155, a resistor C35156, a series resistor R26 and a diode D64, the drain of the LDMOS transistor D3 is matched with the LDMOS transistor D3 through a parallel capacitor C183C184, and the drain is electrically connected to an isolator U32 with the model of SHI3018L-4 through a coupling capacitor C170 and a coupling capacitor C171, and outputs a signal through an L _ out port through the coupling capacitor.
As shown in the front-end circuit design of fig. 3, the B1 passive antenna is electrically interconnected to the capacitor C68 through an MCX RF connector, the other end of the capacitor C68 is electrically connected to the RFC pin of the RF switch U15, the two control pins of the RF switch U15 are electrically connected to two power sources of Vcc and Vcc-EN, respectively, the pin RF2 is electrically connected to one end of the capacitor C163, the other end of the capacitor C163 is electrically connected to one end of the power resistor R20, the other end of the power resistor R20 is electrically connected to ground, the pin RF1 of the RF switch U15 is electrically connected to the input end of the limiter U19 through the coupling capacitor C51, the output end of the limiter U19 is electrically connected to ground through the inductor L24, the output end of the limiter U19 is electrically connected to one end of the coupling capacitor C70, the other end of the coupling capacitor C70 is electrically connected to one end of the inductor L13 through the capacitor C71, and the connection end of the capacitor C9 and the inductor L13 is electrically connected to the ground end of the RFIN port of the amplifier U8653, the RFOUT/Vdd of the low noise amplifier U16 is further electrically connected to the IN port of the acoustic watch filter U20 through coupling capacitors C72 and C73, and the OUT port of the acoustic watch filter U20 is connected to the link of BL _1 through capacitor C74.
As shown IN FIG. 4, the power control unit is designed IN such a way that the power processing unit realizes a regulated power VCC-5V by DC/DC, the power processing unit realizes a regulated power VCC-5V by a series resistor R56, a resistor R55, a parallel resistor R53 and a resistor R51 electrically connected to the-IN port of an operational amplifier U43, the power processing unit realizes a regulated power VCC-5V network by a series resistor R61, a parallel resistor R63 and a resistor R66 electrically connected to the + IN port of an operational amplifier U43, the V-terminal of the operational amplifier U43 is grounded, the V + terminal is electrically connected to the regulated power VCC-5V network by a filter capacitor C149 and a capacitor C150, the output port of the operational amplifier U43 is designed with a pull-up resistor R59 electrically connected to the gate of a PMOS transistor D6, the source of D6 is electrically connected to the regulated power VCC-5V network, the drain of D2 is electrically connected to the filter capacitors C147 and C148 IN parallel to the VCC-5V power network, and the output port of the operational amplifier U8 is electrically connected to the base 68692 by a series resistor R54 and a triode, the emitting electrode of the triode U42 is grounded, the collecting electrode is electrically connected to a stabilized voltage power supply VCC-5V through a series resistor R58, the output of the collecting electrode is electrically connected to the base electrode of a triode D1, the base electrode of the triode D1 and the emitting electrode are connected with a diode D6 in series, the collecting electrode of the triode D1 is directly electrically connected to the stabilized voltage power supply VCC-5V, the emitter electrode of the triode D1 is electrically connected to the grid electrode of a PMOS tube D7, the source electrode of the PMOS tube D7 is electrically connected to the stabilized voltage power supply VCC-5V, and the drain electrode output end of the PMOS tube D7 is electrically connected to a VCC-EN voltage network.
Claims (6)
1. The utility model provides a satisfy bimodulus big dipper third generation navigation antenna of machine-carried electromagnetic compatibility requirement, includes receiving link, transmission link and power control unit, its characterized in that: the receiving link comprises a radio frequency switch U15, a pin RF1 of the radio frequency switch U15 is connected with an input end of a limiter U19 through a capacitor C51, an output end of the limiter U19 is connected with a capacitor C70, a capacitor C71 and an inductor L13 in series, the other end of the inductor L13 is connected with an RFIN end of a low noise amplifier U16, an RFOUT/Vdd of the low noise amplifier U16 is connected with an input end of an acoustic meter filter U20 in series through the capacitor C72 and the capacitor C73, and an OUT port of the acoustic meter filter U20 is connected to a link of BL _1 through a capacitor C74; the transmitting chain comprises a temperature compensator U38, the output end of the temperature compensator U38 is connected with an amplifier U35 through a capacitor C191, the amplifier U35 is connected with a sound meter filter U36 through a capacitor and pi-type attenuation, the output end of the sound meter filter U36 is connected with the grid electrode of an N-channel type MOS tube U39 through a capacitor C194, the drain electrode of the MOS tube U39 is connected with the grid electrode of an LDMOS tube through a capacitor, and the drain electrode of the LDMOS tube is connected with an isolator U32 through a capacitor; the power control unit comprises an operational amplifier U43, the output end of the operational amplifier U43 is respectively connected with the grid electrode of an MOS tube D6 and the base electrode of a triode U42, the emitting electrode of the triode U42 is connected with the base electrode of a triode D1, and the triode D1 is connected with the MOS tube D7 in a common-set mode.
2. The dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements as claimed in claim 1, wherein an RFC pin of the radio frequency switch U15 is connected with a capacitor C68, two control pins of the radio frequency switch U15 are electrically connected to two power supplies of Vcc and Vcc-EN respectively, and a pin RF2 of the radio frequency switch U15 is electrically connected to one end of the capacitor C163.
3. The dual-mode Beidou third generation navigation antenna meeting airborne electromagnetic compatibility requirements as set forth in claim 2, wherein the other end of said capacitor C163 is electrically connected to one end of a power resistor R20, and the other end of said power resistor R20 is electrically connected to ground.
4. The dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements as claimed in claim 1, wherein the output end of the amplitude limiter U19 is grounded through an inductor L24, and the capacitor C71 and the two ends of the inductor L13 are connected with the capacitor C83 in common and grounded.
5. The dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements according to claim 1, wherein the temperature compensator is U38 in model STC0603N9, the amplifier is U35 in model YGA602020, the sound table filter is U36 in model SF9074, the MOS transistor is U39 in model MW6S004NT1, the LDMOS transistor is MW1602, and the isolator is U32 in model SHI 3018L-4.
6. The dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirements according to claim 1 is characterized IN that voltage sampling of VCC _ IN is achieved through voltage division at a + IN end of an operational amplifier U43, a relatively stable power supply VCC-5V is connected at a U43-IN end of the operational amplifier U43, VCC-5V is connected at a V + end of the operational amplifier U43, and a V-end of the operational amplifier U43 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219906.2A CN114006180A (en) | 2021-02-26 | 2021-02-26 | Dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219906.2A CN114006180A (en) | 2021-02-26 | 2021-02-26 | Dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirement |
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| Publication Number | Publication Date |
|---|---|
| CN114006180A true CN114006180A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110219906.2A Pending CN114006180A (en) | 2021-02-26 | 2021-02-26 | Dual-mode Beidou third-generation navigation antenna meeting airborne electromagnetic compatibility requirement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114171914A (en) * | 2022-02-11 | 2022-03-11 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
-
2021
- 2021-02-26 CN CN202110219906.2A patent/CN114006180A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114171914A (en) * | 2022-02-11 | 2022-03-11 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
| CN114171914B (en) * | 2022-02-11 | 2022-05-24 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
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