CN86204034U - C-band satellite microwave receiver - Google Patents
C-band satellite microwave receiver Download PDFInfo
- Publication number
- CN86204034U CN86204034U CN 86204034 CN86204034U CN86204034U CN 86204034 U CN86204034 U CN 86204034U CN 86204034 CN86204034 CN 86204034 CN 86204034 U CN86204034 U CN 86204034U CN 86204034 U CN86204034 U CN 86204034U
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- CN
- China
- Prior art keywords
- intermediate frequency
- circuit
- frequency
- amplifier
- satellite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a satellite microwave receiver which can convert the frequency of satellite c-band into intermediate frequency. Waveguides microstrip impedance gradually changeable transformer is used in the receiver and the waveguides microtrip transformer connected with antenna feed, and the direct connection from the waveguide mouth of the antenna feed to the input microtrip mouth of low noise amplifier is realized. All microwave unit circuits of the receiver are arranged on the printed circuit board on which copper is bespread on polytetrafluoroethene. The oscillator is screened separately and each unit circuit is coupled directly with microstrip lines. The circuit board is arranged in a cavity, integrated construction is realized, and the connection of cable head is omitted. The utility model has the advantages of low cost, small size, and higher reliability and stability.
Description
A kind of can be the novel satellite microwave receiver of intermediate frequency with the frequency translation of satellite C-band.
The utility model belongs to the outdoor unit of satellite television receiving system.
Existing C band satellite microwave receiver mainly is made up of the coalignment that is connected with antenna feed, low noise amplifier, frequency mixer, local oscillator, intermediate frequency amplifier and power circuit.It is that the microwave signal of 3.7GHz～4.2GHz is transformed to 0.97～1.47GHz intermediate-freuqncy signal with carrier wave, presents to indoor satellite television receiving system.
The HYTEK DSB-60(M of DX ANTENNA company of Japan) the MA type product of type product and Canadian ELECTRONICS company is exactly the satellite microwave receiver of this standard, structurally low noise amplifier is made a stand-alone assembly, and frequency mixer, local oscillator and intermediate frequency amplifier are made another stand-alone assembly, adopt the coaxial electrical cable end to connect between these two assemblies.This connected mode just makes that the volume of receiver is big, the cost height, and be easy to generate loose contact, cause reliability, stability decreases.
And the coalignment that is connected with antenna feed, home products adopts the ferrite waveguide microstrip isolator usually, and this just causes the decay of useful signal inevitably, reduces the signal to noise ratio of receiver, and the cost height, and reliability is low.External product also has employing Waveguide-microbelt transducer, but the structure more complicated.
The purpose of this utility model is to make a kind of technical performance to reach or be better than existing device and volume is little, cost is low and stable and reliable for performance satellite microwave receiver.
The utility model is finished in the following manner:
The utility model mainly is made up of the coalignment that is connected with antenna feed, microwave unit circuit and power circuit.Wherein, its coalignment is the impedance transition mechanism formula Waveguide-microbelt transducer that adopts field coupled, has realized the direct connection of antenna feed waveguide mouth to the little band mouth of low noise amplifier input.It is compared with the ferrite waveguide microstrip isolator, has that cost is low, energy loss is little, a noise temperature low (the total noise of centrifuge temperature is reduced about 10 ° of K), high reliability features; Compare with existing Waveguide-microbelt transducer, also have simple in structure, easy to process, Broadband Matching, standing-wave ratio little, insert characteristics such as loss is little, reliability height.
Microwave unit circuit of the present utility model is by forming with the lower part: (1) low noise field effect transistor amplifier: will amplify from the extremely faint signal of antenna.(2) mirror image suppresses balanced mixer: be made up of mirror image band stop filter, diode balanced mixer, low pass filter.Band stop filter is used for suppressing 6:14～6.64GHz mirror image interfering frequency, balanced mixer is then the 3:7～4:2GHz signal and the mixing mutually of 5.17GHz local frequency that have amplified through low noise amplifier, produce 0.97～1:47GHz intermediate-freuqncy signal, send intermediate frequency amplifier to through low pass filter again, the cut-off frequency of low pass filter is 1:6GHz.(3) dielectric resonant chamber resonator oscillator: produce the 5:17GHz local oscillation signal.(4) intermediate frequency amplifier: the 0:97 after the mixing～1.47GHz intermediate-freuqncy signal is amplified again, present to indoor satellite receiving equipment through the feeder line of 50 Ω.
Foregoing circuit is powered to+6V through the voltage stabilizing circuit voltage stabilizing by 15～25V external power supply.
Overall gain＞50dB of the present utility model, noise temperature≤65 ° K, ≤ 75 ° of K, ≤ 85 ° of K, image rejection ratio 〉=40dB, input signal be 3:7～4:2GHz, output signal be 0.97～1.47GHz, when bandwidth is 500MHz, amplitude-frequency response≤± 1:5dB, amplitude-frequency response during 36MHz bandwidth in office then≤± 0:5dB, ambient temperature is-40～+ 50 ℃, the local frequency stability is ± 1MHz(-40～+ 50 ℃).
All microwave unit circuit are installed on the multiple copper circuit printed panel of a polytetrafluoroethylene in the utility model, local oscillator is added with the individual screen cover, directly be coupled with microstrip line between each element circuit, this circuit board is contained in the cavity, realize integral structure, saved the cable end connection, dwindled volume, reduce cost, improved reliability and stability.
Be enforcement illustration of the present utility model below.
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 be accompanying drawing 1 along A-A to the cutaway view of Waveguide-microbelt transducer.
Accompanying drawing 3 is an electrical schematic diagram of the present utility model.
Among Fig. 1, Waveguide-microbelt transducer (1) is fastened on the metal receiving box (2) with screw.Be fixed with a packaged multiple copper printed circuit board (PCB) (3) of polytetrafluoroethylene that the circuit elements device is arranged with screw (8) in the receiving box (2), lid (6) is fastened on screw (7) and accepts on the box (2), receiving box (2) inwall is equipped with a lute (5), plays the water-tight effect.And receiving box (2) and the existing effect of sealing the circuit elements device up for safekeeping of lid (6), shielded again function.
Band stop filter, the local oscillator of low noise amplifier, little band forms, the components and parts such as 3db directional couple diode balanced mixer of little band forms are installed on printed circuit board (PCB) (3).Wherein only local oscillator is added with radome (4).
Microstrip line in the foregoing circuit (9) all is to form with the chemical method corrosion on printed circuit board (PCB).
Cable end (10) is the utility model medium frequency output end, and signal is presented to indoor receiving system.
Among Fig. 2, Waveguide-microbelt transducer (1) is made of waveguide cavity (11), debugging screw (12), inner wire (13), insulator (15), packing ring (14), sleeve (16).
Inner wire (13) is a straight round metal bars, 40～45 millimeters of total lengths, be divided into plurality of sections, the length of each section, diameter all do not wait, except that middle one section, the diameter of all the other each sections is descending gradual changes, and diameter big and debugging screw (12) match, can draw maximum electric wave energy from antenna, on diameter the is little input microstrip line interface that then directly is welded on low noise amplifier.
Inner wire (13) surface gold-plating.
Among Fig. 3, low noise amplifier is made up of Low-noise GaAs field effect transistor three-stage amplifier, adopt micro strip matching network between first order field effect transistor amplifier in and the Waveguide-microbelt converter output end, the inter-stage of the front and back level of three grades of field effect transistor all adopts microstrip line conjugate impedance match network, BG
1Be NE67383, BG
2Be CX509D, BG
3Be CX509C, R
1, R
2, R
4Be source resistance, R
3, R
5Be drain resistance, C
1, C
2, C
4Be source electrode shunt capacitance, C
3, C
5Be blocking condenser.
F
1Be the mirror image band stop filter, constitute, be used for suppressing 6.14～6:64GHz mirror image interfering frequency, DC by the little band in (λ)/4 open circuit in parallel cutting back band line
13dB impedance conversion branch line directional coupler for little band constitutes plays immixture.BG
5, BG
6Diode for the GaAs balanced mixing.F
2Be low pass filter, two the high frequency short circuit pieces and the high impedance intermediate frequency output line that are made of microstrip line are formed.
Oscillating tube BG
4Be GaAs field effect transistor WC582C, DR
1Be the high Q value cylindrical cavity of being made by high dielectric constant insulating material, its model is A
6, it is positioned at BG
4Carry out magnetic coupling between the drain and gate, keep the vibration of high stable.R
6Be source resistance, R
7Be resistance, C
6Be coupling capacitance.
Intermediate frequency amplifier is formed BG by three grades of intermediate frequency amplifier circuit
7, BG
8, BG
9Be 2G914C, R
8, R
9Be BG
7Base biasing resistor, R
11, R
12, R
13, be BG
8Biasing resistor, R
15, R
16, R
17, be the BG9 base biasing resistor, R
10, R
14, R
18, be respectively BG
7, BG
8, BG
9Emitter resistance, C
8, C
9, C
11, C
12, C
14, C
16, C
20, C
21, be high-frequency bypass capacitor, C
10, C
15, C
17, C
23, be decoupling capacitance, L
2Be power supply decoupling inductance, L
3Be the high frequency choke inductance.+ 15～+ external power supply of 20V is through L
3, L
24Decoupling is sent into power IC and is carried out voltage stabilizing, L
1, C
19, R
18Be phase-shift network, be used for suppressing self-excitation.
JC
1, JC
2, JC
3Be SW7806 power IC, JC
4Be the SW7812 power IC, external power supply is through JC
4Voltage stabilizing is to+12V, again through JC
1, JC
2, JC
3All voltage stabilizing is to+6V, respectively as the power supply of low noise amplifier, oscillator, intermediate frequency amplifier, and BG
10, BG
11Be 2CZ82A, connect at external electric power polarity and play the protective circuit effect inverse time.L
4, L
5, L
6, L
7Be decoupling inductance, C
25, C
26, C
27, C
28, C
29, C
30, be decoupling capacitance.
The numerical value of each components and parts is consulted Fig. 3.
Claims (4)
1, a kind of satellite microwave receiver that satellite C-band frequency inverted is become intermediate frequency, it is made of element circuits such as the coalignment that is connected with antenna feed, power circuit and low noise amplifier, frequency mixer, local oscillator, intermediate frequency amplifiers, it is characterized in that the coalignment that is connected with antenna feed adopts Waveguide-microbelt impedance transition mechanism formula transducer [1].
2, satellite microwave receiver according to claim 1, it is characterized in that described Waveguide-microbelt transducer is to be made of inner wire (13), insulator (15), waveguide cavity (11), debugging screw (12) and sleeve (16), inner wire (13) is several sections diameters, a length round metal bars all inequality, and its surface is coated with gold or silver.
3, satellite microwave receiver according to claim 1, it is characterized in that element circuits such as described low noise amplifier, frequency mixer, local oscillator, intermediate frequency amplifier are installed on the multiple copper printed circuit board (PCB) (3) of a polytetrafluoroethylene, each element circuit directly is coupled by microstrip line, local oscillator is added with the individual screen cover, and this circuit board is contained in the cavity.
4, according to claim 1 with require 3 described satellite microwave receivers, it is characterized in that described low noise amplifier is made up of Low-noise GaAs field effect transistor three-stage amplifier, frequency mixer comprises the mirror image band stop filter that the little band in (λ)/4 open circuit in parallel cutting back band line constitutes, the balanced mixer that low pass filter that two high frequency short circuit pieces that microstrip line constitutes and high impedance intermediate frequency output line are formed and GaAs balanced mixing diode constitute, oscillator is the dielectric resonant chamber resonator oscillator, intermediate frequency amplifier is made up of three grades of intermediate frequency amplifier circuit of GaAs field effect transistor, and power circuit is an integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204034 CN86204034U (en) | 1986-08-28 | 1986-08-28 | C-band satellite microwave receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204034 CN86204034U (en) | 1986-08-28 | 1986-08-28 | C-band satellite microwave receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86204034U true CN86204034U (en) | 1987-07-01 |
Family
ID=4807196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86204034 Withdrawn CN86204034U (en) | 1986-08-28 | 1986-08-28 | C-band satellite microwave receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86204034U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035077A (en) * | 2014-06-16 | 2014-09-10 | 西安天和防务技术股份有限公司 | Large dynamic continuous wave radar receiver |
| CN106353586A (en) * | 2016-10-21 | 2017-01-25 | 成都前锋电子仪器有限责任公司 | Coupling and detection circuit |
| US9960836B2 (en) | 2014-05-19 | 2018-05-01 | L-3 Technologies, Inc. | Method and system for satellite using multifunctional motherboard |
-
1986
- 1986-08-28 CN CN 86204034 patent/CN86204034U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9960836B2 (en) | 2014-05-19 | 2018-05-01 | L-3 Technologies, Inc. | Method and system for satellite using multifunctional motherboard |
| CN104035077A (en) * | 2014-06-16 | 2014-09-10 | 西安天和防务技术股份有限公司 | Large dynamic continuous wave radar receiver |
| CN106353586A (en) * | 2016-10-21 | 2017-01-25 | 成都前锋电子仪器有限责任公司 | Coupling and detection circuit |
| CN106353586B (en) * | 2016-10-21 | 2023-07-04 | 成都前锋电子仪器有限责任公司 | Coupling detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |