CN208079074U - C frequency ranges minimize one transmitter and four receivers intermediate frequency unit - Google Patents
C frequency ranges minimize one transmitter and four receivers intermediate frequency unit Download PDFInfo
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- CN208079074U CN208079074U CN201820696852.2U CN201820696852U CN208079074U CN 208079074 U CN208079074 U CN 208079074U CN 201820696852 U CN201820696852 U CN 201820696852U CN 208079074 U CN208079074 U CN 208079074U
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Abstract
The utility model discloses a kind of C frequency ranges to minimize one transmitter and four receivers intermediate frequency unit, is applied to C Band Airborne satellite communication systems.It is made of components such as modulator, demodulator, frequency synthesizer, amplifier, attenuator, droop amplifier, filter, filter amplifier, switches, is controlled by serial line interface.The utility model has miniaturization, low-power consumption, integrated design, high-speed frequency-hopping, receive-transmit isolation height, steady performance, can work normally in the presence of a harsh environment, the transceiver intermediate frequency unit being particularly suitable for application as in onboard satellite communication terminal.Include four separate spaces in the utility model C frequency range one transmitter and four receivers intermediate frequency units, divide chamber to be effectively isolated receiving and transmitting signal by space, prevents transmitting signal from, to receiving on signal, influencing receptivity by Space Coupling；In addition, being effectively filtered out to the high-frequency signal on control signal by carrying out effectively filtering to transmitting-receiving IF control signal, the demodulation performance for receiving intermediate frequency unit is significantly improved.
Description
Technical field
The utility model is related to a kind of C frequency ranges in wireless communication field to minimize one transmitter and four receivers intermediate frequency unit, especially suitable
For the transceiver intermediate frequency unit as onboard satellite communication equipment.
Background technology
At present in the onboard satellite communications field, due to different communication system and the demand of application, modem termination is logical
It often needs comprising multichannel transmitting and receiving channel, in a limited space, since receive-transmit isolation is poor, transmitting signal easily couples
To receiving on signal, transmitting-receiving crosstalk is caused, receptivity is influenced.In order to improve the demodulation of onboard satellite communication terminal receiving channel
Performance, modem termination other than the requirement of miniaturization to be met, low-power consumption, high-speed frequency-hopping and multichannel, to transmitting-receiving every
Also there is very high requirement from this index is spent.The transceiver intermediate frequency unit in satellite communication equipment cannot meet simultaneously at present
Miniaturization, low-power consumption, multichannel and the high requirement of receive-transmit isolation.
Utility model content
The purpose of this utility model is that avoid the deficiency in above-mentioned background technology and provide it is a kind of can be used as onboard satellite
The C frequency range one transmitter and four receivers intermediate frequency units of communication equipment transceiver intermediate frequency unit, the utility model can be in relatively rugged environment-
Run at 40 DEG C~+60 DEG C, receive-transmit isolation is up to 70dB, while also have miniaturization, low-power consumption, high-speed frequency-hopping, multichannel,
The features such as simple in structure, performance is stablized.
Technical solution adopted in the utility model is：C frequency ranges minimize one transmitter and four receivers intermediate frequency unit, including emission medium-frequency
Circuit and reception intermediate-frequency circuit, it includes four tunnel receiving channels to receive intermediate-frequency circuit；Emission medium-frequency circuit and reception intermediate-frequency circuit
It is laid out respectively on the two sides of printed board, is shielded by shielding case per one side printed board；Printed board where receiving intermediate-frequency circuit
One side on setting there are four separate space, receiving channel all the way is equipped in each separate space；
Wherein, emission medium-frequency includes frequency hopping local oscillator 9, third amplifier 10, modulator 11, the first controllable attenuator 12 and declines
Subtract amplifier 13；Receive intermediate frequency include the first amplifier 1, filter 2, the second amplifier 3, splitter 4, the first receiving channel 5,
Second receiving channel 6, third receiving channel 7 and the 4th receiving channel 8；The RF signal input end of first amplifier 1
Mouth is communicated with the outside, and RF signal output mouth is connected with the RF signal input end mouth of filter 2；The radio frequency of filter 2 is believed
Number output port is connected with the RF signal input end mouth of the second amplifier 3；The RF signal output mouth of second amplifier 3 with
The RF signal input end mouth of splitter 4 is connected；Four road shunting sign output ports of splitter 4 respectively with the first receiving channel
5, the second receiving channel 6, third receiving channel 7 are connected with the RF signal input end mouth of the 4th receiving channel 8；First reception is logical
Road 5, the second receiving channel 6, third receiving channel 7 and the 4th receiving channel 8 RF signal output mouth respectively with external phase
Even；The local oscillation signal output port of frequency hopping local oscillator 9 is connected with the local oscillator input port of third amplifier 10；Third amplifier 10
Local oscillation signal output port is connected with the local oscillation signal input port of modulator 11；The baseband signal input port of modulator 11 with
Outside is connected, and modulated signal output port is connected with the modulated signal input port of the first controllable attenuator 12；First controllably declines
The modulated signal output port for subtracting device 12 is connected with the modulated signal input port of droop amplifier 13；The tune of droop amplifier 13
Signal output port processed is communicated with the outside.
Wherein, the frequency hopping local oscillator 9 includes first frequency synthesizer 14, second frequency synthesizer 15 and switch 16；The
The local oscillation signal output port of one frequency synthesizer 14 and second frequency synthesizer 15 is inputted with the local oscillation signal of switch 16 respectively
Port is connected；The local oscillation signal output port of switch 16 is connected with the local oscillator input port of third amplifier 10；
The first frequency synthesizer 14 and second frequency synthesizer 15 is laid out respectively in the both sides of one side printed board, and
It is shielded respectively by shielding case；And the enable pin of first frequency synthesizer 14 and second frequency synthesizer 15 share it is same
Root control line is controlled by the same control chip, filter has been respectively connected on enable pin.
Wherein, first receiving channel 5 controllably declines including the second controllable attenuator 17, the 4th amplifier 18, third
Subtract device 19, the first demodulator 20, third frequency synthesizer 21 and the first filter amplifier 22；Second controllable attenuator 17
RF signal input end mouth is connected with the RF signal output mouth of splitter 4, RF signal output mouth and the 4th amplifier
18 RF signal input end mouth is connected；The 4th RF signal output mouth of amplifier 18 and penetrating for third controllable attenuator 19
Frequency signal input port is connected；The radiofrequency signal of the RF signal output mouth of third controllable attenuator 19 and the first demodulator 20
Input port is connected；The local oscillation signal input port of first demodulator 20 and the local oscillation signal output end of third frequency synthesizer 21
Mouth is connected, and baseband signal output port is connected with the baseband signal input port of the first filter amplifier 22；First filter and amplification
The baseband signal output port of device 22 is communicated with the outside.
Wherein, the second receiving channel 6, third receiving channel 7, the 4th receiving channel 8 and 5 structure phase of the first receiving channel
Together.
The utility model has the following advantages that compared to background technology：
1, the utility model has the high characteristic of receive-transmit isolation, and transmitting-receiving level can still work normally when differing 80dB.
2, the utility model integration degree is high, and low in energy consumption, debugging work load is small, can be in relatively rugged environment temperature-
It is worked normally at 40 DEG C~+60 DEG C.
3, the utility model is compact-sized, small, at low cost, has application value.
Description of the drawings
Fig. 1 is the functional block diagram that the utility model C frequency ranges minimize one transmitter and four receivers intermediate frequency unit；
Fig. 2 is the functional block diagram of the utility model frequency hopping local oscillator；
Fig. 3 is the functional block diagram of the first receiving channel of the utility model.
Specific implementation mode
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Referring to Fig.1, the utility model is made of emission medium-frequency circuit with intermediate-frequency circuit is received, and emission medium-frequency circuit includes jumping
Frequency local oscillator 9, third amplifier 10, modulator 11, the first controllable attenuator 12 and droop amplifier 13；Receiving intermediate-frequency circuit includes
First amplifier 1, filter 2, the second amplifier 3, splitter 4, the first receiving channel 5, the second receiving channel 6, third receive
Channel 7 and the 4th receiving channel 8, Fig. 1 are the electrical schematic block diagrams of the utility model embodiment, and embodiment presses Fig. 1 connection lines.
Wherein, the first amplifier 1 is amplified C frequency range radio-frequency input signals, and the first amplifier of embodiment 1 dedicated is put using commercially available
Big device SBB-3089Z；Filter 2, which is filtered radiofrequency signal, to be filtered out band stray signal and is transmitted to the second amplifier 3, embodiment
Filter 2 uses commercially available dedicated filter LFCN-3800+；The second amplifier of embodiment 3 acts on and model is the same as the first amplifier
1；The signal that splitter 4 exports the second amplifier 3 carries out branch, and radiofrequency signal is equally divided into four tunnels, embodiment splitter 4
Using commercially available dedicated four splitters SRSC-4-63+；Third amplifier 10 carries out power adjustment to local oscillation signal, ensures local oscillator
Signal power meets requirement, and embodiment third amplifier 10 uses commercially available dedicated amplifier SBB-3089Z；Modulator 11
IQ baseband signals and local oscillation signal are subjected to orthogonal modulation, generate C frequency range modulated signals, embodiment modulator 11 is using commercially available special
Modulator ADL5375-05ACPZ；First controllable attenuator 12 carries out power adjustment to modulated signal, ensures modulated signal
Power meets system requirements, and the first controllable attenuator of embodiment 12 uses commercially available dedicated integrated chip HMC624LP4E；Decaying
Amplifier 13 is adjusted modulation signal power and exports after amplify, the commercially available dedicated collection of the use of embodiment droop amplifier 13
At chip HMC625LP5E.
Wherein, as shown in Fig. 2, the frequency hopping local oscillator 9 include first frequency synthesizer 14, second frequency synthesizer 15,
Switch 16, the major function of the part are to generate C frequency range frequency hopping local oscillators, and frequency hopping speed is 10,000 jumps/second, embodiment first frequency
Synthesizer 14, second frequency synthesizer 15 use commercially available dedicated integrated chip HMC833LP5E；16 pairs of two-way local oscillator letters of switch
It number is selected, embodiment switch 16 uses commercially available dedicated switch HMC232A；First frequency synthesizer 14, second frequency are comprehensive
Clutch 15 generates two-way local oscillation signal respectively, switched at high speed by 16 pairs of two-way local oscillation signals of switch, it can be achieved that 10,000 jump/
The frequency hopping speed of second.First frequency synthesizer 14, second frequency synthesizer 15 are laid out respectively in the both sides of printed board one side, are passed through
Shielding case respectively shields the two, improves the isolation between two-way local oscillation signal, improves frequency hopping local oscillator performance.Due to plate
Card body product is limited, and the utility model uses Serial Control, and first frequency synthesizer 14, second frequency synthesizer 15 are by same
Control chip is controlled, and the shared same root control line of enable pin of two chips, the first frequency synthesizer 14,
Second frequency synthesizer 15 generates two-way local oscillation signal respectively, since local oscillation signal frequency is high, power is big, meeting between local oscillation signal
It is intercoupled, is carried out by the enable pin to first frequency synthesizer 14, second frequency synthesizer 15 effective by control line
Filtering, filters out the high-frequency local oscillation signal component carried on enable pin, prevents two-way local oscillation signal from passing through enable pin phase mutual coupling
It closes, to deteriorate local oscillator performance, and then influences emission medium-frequency index.
Wherein, as shown in figure 3, first receiving channel 5 include the second controllable attenuator 17, the 4th amplifier 18,
Third controllable attenuator 19, demodulator 20, third frequency synthesizer 21, filter amplifier 22, the major function of the part are to adjust
The level of whole C frequency ranges input signal is directly demodulated the C frequency band signals after adjustment with C frequency ranges local oscillator, generates four road IQ bases
Band signal is for rear class AD processing.Second controllable attenuator 17, third controllable attenuator 19 to C frequency ranges incoming signal level into
Row adjustment, the second controllable attenuator of embodiment 17, third controllable attenuator 19 use commercially available dedicated controllable attenuator
HMC624LP4E；4th amplifier 18 is amplified C frequency range input signals, adjusts signal power, the 4th amplifier of embodiment
18 use commercially available dedicated amplifier SBB-3089Z；The radiofrequency signal that demodulator 20 will come from the transmission of third controllable attenuator 19
It is mixed to obtain four road IQ baseband signals with the local oscillation signal that third frequency synthesizer 21 generates, embodiment demodulator 20 uses
Commercially available dedicated demodulator ADL5380ACPZ, third frequency synthesizer 21 use commercially available dedicated integrated chip HMC835LP5E；
Filter amplifier 22 is filtered to four road IQ baseband signals and enhanced processing, is adjusted, is filtered out with outer miscellaneous to signal level
It dissipates, embodiment filter amplifier 22 uses commercially available dedicated integrated chip ADRF6510；Second to the 4th receiving channel 6-8 effects
And function, with the first receiving channel 5, the component that embodiment uses is with reference to the first receiving channel 5.Wherein, the second controllable attenuator
The input signal of 17 pair of first receiving channel 5 carries out power adjustment；4th amplifier 18 is amplified radiofrequency signal, adjustment letter
Number power；Can third control attenuator 19 power adjustment carried out again to input radio frequency signal, ensure that RF signal power meets system
System requires；The sheet that demodulator 20 generates the radiofrequency signal come from the transmission of third controllable attenuator 19 with third frequency synthesizer 21
The signal that shakes is mixed to obtain four road IQ baseband signals, for rear class AD processing.
Wherein, the integrated design thought, emission medium-frequency and four tunnels reception intermediate frequency are pressed using integrated design all the way
It is laid out respectively on the two sides of printed board according to planning, transmitting is shielded respectively with intermediate frequency is received by shielding case, improves transmitting
With the isolation between reception intermediate frequency, transmitting-receiving crosstalk is reduced.In addition, being designed with this configuration, product can be effectively reduced
Volume meets the needs of miniaturization.
The brief operation principle of the utility model is as follows：It is controlled, is received by serial ports pair first logical using serial line interface
Road 5, the second receiving channel 6, third receiving channel 7, the 4th receiving channel 8, frequency hopping local oscillator 9, the first controllable attenuator 12, decaying
Amplifier 13 etc. is controlled, and required one transmitter and four receivers intermediate frequency unit is obtained by the collective effect of each section.
It can realize that miniaturization, low-power consumption, the C frequency ranges miniaturization one of high-speed frequency-hopping, high-isolation are sent out using the technical solution
Four receive intermediate frequency unit.
Claims (4)
1.C frequency ranges minimize one transmitter and four receivers intermediate frequency unit, including emission medium-frequency circuit and reception intermediate-frequency circuit, receive intermediate-frequency circuit
Include four tunnel receiving channels；It is characterized in that, emission medium-frequency circuit is laid out respectively with intermediate-frequency circuit is received the two of printed board
Face is shielded per one side printed board by shielding case；Receive intermediate-frequency circuit where printed board one side on setting there are four every
Chamber is equipped with receiving channel all the way in each separate space；
The emission medium-frequency circuit includes frequency hopping local oscillator (9), third amplifier (10), modulator (11), the first controllable attenuation
Device (12) and droop amplifier (13)；Receive intermediate-frequency circuit include the first amplifier (1), filter (2), the second amplifier (3),
Splitter (4), the first receiving channel (5), the second receiving channel (6), third receiving channel (7) and the 4th receiving channel (8)；Institute
The RF signal input end mouth for the first amplifier (1) stated is communicated with the outside, and RF signal output mouth is penetrated with filter (2)
Frequency signal input port is connected；The RF signal input end of the RF signal output mouth and the second amplifier (3) of filter (2)
Mouth is connected；The RF signal output mouth of second amplifier (3) is connected with the RF signal input end mouth of splitter (4)；Branch
Four road shunting sign output ports of device (4) respectively with the first receiving channel (5), the second receiving channel (6), third receiving channel
(7) it is connected with the RF signal input end mouth of the 4th receiving channel (8)；First receiving channel (5), the second receiving channel (6),
The RF signal output mouth of three receiving channels (7) and the 4th receiving channel (8) is communicated with the outside respectively；Frequency hopping local oscillator (9)
Local oscillation signal output port is connected with the local oscillator input port of third amplifier (10)；The local oscillation signal of third amplifier (10) is defeated
Exit port is connected with the local oscillation signal input port of modulator (11)；The baseband signal input port of modulator (11) and external phase
Even, modulated signal output port is connected with the modulated signal input port of the first controllable attenuator (12)；First controllable attenuator
(12) modulated signal output port is connected with the modulated signal input port of droop amplifier (13)；Droop amplifier (13)
Modulated signal output port is communicated with the outside.
2. C frequency ranges according to claim 1 minimize one transmitter and four receivers intermediate frequency unit, it is characterised in that：The frequency hopping sheet
Shake (9) include first frequency synthesizer (14), second frequency synthesizer (15) and switch (16)；First frequency synthesizer (14) and
The local oscillation signal output port of second frequency synthesizer (15) is connected with the local oscillation signal input port of switch (16) respectively；Switch
(16) local oscillation signal output port is connected with the local oscillator input port of third amplifier (10)；
The first frequency synthesizer (14) and second frequency synthesizer (15) is laid out respectively in the both sides of one side printed board, and
It is shielded respectively by shielding case；And the enable pin of first frequency synthesizer (14) and second frequency synthesizer (15) shares
Same root control line is controlled by the same control chip, filter has been respectively connected on enable pin.
3. C frequency ranges according to claim 1 minimize one transmitter and four receivers intermediate frequency unit, it is characterised in that：Described first connects
It includes the second controllable attenuator (17), the 4th amplifier (18), third controllable attenuator (19), the first demodulator to receive channel (5)
(20), third frequency synthesizer (21) and the first filter amplifier (22)；The radiofrequency signal of second controllable attenuator (17)
Input port is connected with the RF signal output mouth of splitter (4), RF signal output mouth and the 4th amplifier (18)
RF signal input end mouth is connected；The 4th RF signal output mouth of amplifier (18) and penetrating for third controllable attenuator (19)
Frequency signal input port is connected；The radio frequency of the RF signal output mouth and the first demodulator (20) of third controllable attenuator (19)
Signal input port is connected；The local oscillation signal input port of first demodulator (20) is believed with the local oscillator of third frequency synthesizer (21)
Number output port is connected, and baseband signal output port is connected with the baseband signal input port of the first filter amplifier (22)；The
The baseband signal output port of one filter amplifier (22) is communicated with the outside.
4. C frequency ranges according to claim 3 minimize one transmitter and four receivers intermediate frequency unit, it is characterised in that：Second receiving channel
(6), third receiving channel (7), the 4th receiving channel (8) are identical as the first receiving channel (5) structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820696852.2U CN208079074U (en) | 2018-05-11 | 2018-05-11 | C frequency ranges minimize one transmitter and four receivers intermediate frequency unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820696852.2U CN208079074U (en) | 2018-05-11 | 2018-05-11 | C frequency ranges minimize one transmitter and four receivers intermediate frequency unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208079074U true CN208079074U (en) | 2018-11-09 |
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ID=64045771
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820696852.2U Active CN208079074U (en) | 2018-05-11 | 2018-05-11 | C frequency ranges minimize one transmitter and four receivers intermediate frequency unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208079074U (en) |
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2018
- 2018-05-11 CN CN201820696852.2U patent/CN208079074U/en active Active
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