CN201373920Y - Microwave electronic distance meter front end module with wide-temperature range and high sensitivity - Google Patents
Microwave electronic distance meter front end module with wide-temperature range and high sensitivity Download PDFInfo
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- CN201373920Y CN201373920Y CN200920101950U CN200920101950U CN201373920Y CN 201373920 Y CN201373920 Y CN 201373920Y CN 200920101950 U CN200920101950 U CN 200920101950U CN 200920101950 U CN200920101950 U CN 200920101950U CN 201373920 Y CN201373920 Y CN 201373920Y
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Abstract
A microwave electronic distance meter front end module with wide-temperature range and high sensitivity belongs to the technical field of measurement and is used for solving the problem of measuring distance when moving at high speed. The technical scheme thereof is as follows: the microwave electronic distance meter front end module comprises a Seiler three point type oscillator with a loop antenna, a detection circuit and an active biasing circuit, wherein a mixing signal output by the Seiler three point type oscillator is processed by the detection circuit to form a Doppler difference-frequency signal which is connected with a post-stage circuit; and the active biasing circuit consists of a constant-current triode of which the emitting electrode is connected with the anode of a power supply through an eighth resistor, and the collector electrode is connected with the base electrode of an oscillator triode of the Seiler three point type oscillator through a fourth resistor and a third inductor; and the upper biasing resistor and lower biasing resistor of the base electrode are respectively a second resistor and a third resistor. The microwave electronic distance meter front end module has simple structure, stable performance and the measuring accuracy less influenced by temperature, and can keep higher detection sensitivity in total temperature range.
Description
Technical field
The utility model relates to the microwave signal processing module of using in a kind of microwave electron stadimeter, belongs to field of measuring technique.
Background technology
At present, be used to measure the electronic installation of distance between the object of relative motion, particularly electronics is closely felt fuse (refer to adopt the method for radar range finding, the fuze system automatic range also starts fuse when distance object distance to a declared goal) many employing Doppler's principles or frequency modulation methods range finding.This device generally by front-end module and in, the low frequency signal processing module forms, wherein, the performance of front-end module plays crucial effects to the measuring accuracy of whole device.So-called front-end module is meant the microwave signal channel that comprises antenna, vibration, emission, amplification, mixing and detecting circuit.For stadimeter, except that detection range should meet the requirements, generally also require the instrument can both operate as normal in-50 ℃～+ 50 ℃ scopes in outdoor application.Because the detecting circuit that front-end module is exported is very big with respect to the variation of temperature rate, for eliminating the effects of the act, existing electronics is closely felt range finding front-end module that fuse uses and is often adopted and strengthen degenerative method and suppress significantly to be changed and the change of sensitivity that causes by temperature, and instrument can be used in wide temperature range.But the sensitivity of instrument is declined to a great extent, reduced the detection range of instrument, such as measure between the above object of relative velocity 200 meter per seconds apart from the time, survey range finding and only be 1～5 meter.The instrument that also has adopts the method that reverse compensating circuit is set to offset the variation of the oscillatory circuit sensitivity that the PN junction temperature influence owing to generator triode causes, but effect is unsatisfactory, because the sensitivity of oscillatory circuit is by all units, the common decision of device in the tank circuit, compensating circuit can influence the frequency and the power of oscillatory circuit simultaneously, and then sensitivity is exerted an influence.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of wide warm area high sensitivity microwave electronic distance measuring instrument front-end module that has of simple in structure, stable performance is provided.
Problem described in the utility model realizes with following technical proposals:
A kind of have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module, bikini oscillator is reined in the west that comprises band shape antenna in the formation, detecting circuit and active biased circuit, described west is reined in the mixed frequency signal of bikini oscillator output and is handled the Doppler beat freque signal of formation after detection through detecting circuit, connect back level signal processing circuit, described active biased circuit is made of constant current triode, the emitter of described constant current triode connects positive source through the 8th resistance, collector connects the base stage that the generator triode of bikini oscillator is reined in the west through the 4th resistance and the 3rd inductance successively, on the constant current triode base stage, below-center offset resistance is respectively second resistance and the 3rd resistance.
Above-mentioned have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module, bikini oscillator is reined in by generator triode in described west, tours antenna, inductance, electric capacity and resistance are formed, the collector of described generator triode is through first inductance, one end of the second electric capacity T-Ring shape antenna, base stage is through second inductance of serial connection, the other end of the first electric capacity T-Ring shape antenna, form main positive feedback network, emitter is formed the direct current negative feedback network through the 4th inductance and the 6th resistance (comprising the 5th adjustable resistance, i.e. the regulating loop resistance size by removing the short circuit line) successively; Described the 4th inductance and the 4th, the 5th electric capacity constitute π type filtering circuit, and the 5th electric capacity constitutes the base stage of generator triode and the AC feedback circuit between the emitter simultaneously.
Above-mentioned have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module, described detecting circuit is made of the detection triode, the emitter of described detection triode connects positive source, base stage connects the output terminal of generator triode, and emitter is with being connected to accept the difference frequency Doppler signal of mixer tube AC signal (oscillating tube is held concurrently) by a bit of impedance line between the ground level; Collector is successively through the 6th inductance and the 7th resistance eutral grounding, and as output terminal, the 7th electric capacity is filter capacitor, is parallel on the 7th resistance and forms frequency selection circuit behind the 9th resistance for the 6th inductance and the 7th resistance string contact.
Above-mentioned have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module, and serial connection the 5th inductance is connected positive supply in the emitter circuit of described detection triode, gives the power supply of vibration (mixing) pipe by impedance line simultaneously.
Distance between the object of the utility model employing Doppler self-heterodyne detection mode measurement relative motion, it reins in vibration, emission, reception, the mixting circuit of bikini oscillator as microwave with the west of band shape antenna, will be by delivering to detecting circuit after the measured object microwave that reflects and the mixing that transmits, the Doppler beat freque signal that detecting circuit is handled back formation to the mixed frequency signal detection send late-class circuit.The active biased circuit of this circuit has constituted a constant current source, and the electric current that makes tank is the acute variation with variation of ambient temperature not basically.Because active biased circuit inserts tank by high frequency choke coil (inductance), so do not influence the factors relevant with sensitivity such as frequency, gain and power of circuit high-frequency ac component basically.Therefore this front-end module can keep higher detection sensitivity basically in full warm area.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is an electrical schematic diagram of the present utility model.
Each label is among the figure: T1, generator triode, T2, the detection triode, T3, constant current triode, AN, tours antenna, trimming capacitor C 0, the first capacitor C 1, second capacitor C, 2, the three capacitor C, 3, the four capacitor C 4, the 5th capacitor C 5, the six capacitor C 6, the seven capacitor C 7, the 8th capacitor C 8, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the four resistance R 4, the five resistance R 5, the 6th resistance R 6, the seven resistance R 7, the eight resistance R 8, the 9th resistance R 9, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, the four inductance L 4, the five inductance L 5, the 6th inductance L 6, impedance line L0 (in fact it utilizes the impedance that one section line itself forms).
Embodiment
Referring to Fig. 1, the tank circuit of the utility model oscillatory circuit is formed the positive-feedback circuit that comprises that BE knot, inductance L 1, L2, capacitor C 1, C2 and tours antenna AN (equivalence is an inductance) by generator triode T1 form, and their determine oscillation frequency, frequency band and the power of main vibration circuit.Trimming capacitor C 0 is frequency trim electric capacity, the EB knot of generator triode T1 and the 5th resistance R 5, the 6th resistance R 6, the 4th capacitor C 4 are formed the direct current negative-feedback circuit, it is for the ease of adjusting negative feedback depth, with the increase and decrease of fine tune sensitivity that the 5th resistance R 5 and line in parallel thereof are set.The 5th capacitor C 5 constitutes the interchange negative feedback, forms π type filtering circuits with the filtering clutter with the 4th capacitor C 4 and the 4th inductance L 4 simultaneously.The 6th capacitor C 6 is used for the interference of filtering higher hamonic wave, and the 3rd inductance L 3, the 4th inductance L 4, the 5th inductance L 5, the 6th inductance L 6 are that high frequency choke coil is revealed to stop high-frequency signal.The Doppler beat freque signal is after detection triode T2 collector output, through the 6th inductance L 6, and the resonator filter circuit (frequency-selecting) formed of the 7th resistance R 7, the 7th capacitor C 7, at last by 9 outputs of the 9th resistance R.Power supply inserts after the 8th capacitor C 8 moves back after the lotus root filtering one the tunnel and is tank and detection triode T2 power supply through first resistance R 1 and the 5th inductance L 5, and another road provides the direct current biasing of voltage stabilizing function for constant current triode T3 via second resistance R 2 (upper offset) and the 3rd resistance R 3 (below-center offset).The BC knot of constant current triode T3 approaches constant dc bias current by the 4th resistance R 4 and the 3rd inductance L 3 for tank provides.Change less alternating current variation and vary with temperature relative direct current, then by exchanging the negative feedback compensation at full warm area.Because required compensation is less, so negative feedback depth is less, it is less to make that hunting power reduces, and has finally kept higher detection sensitivity, and the sensitivity that has guaranteed full warm area does not simultaneously vary with temperature rate and declines to a great extent.
Claims (4)
1, a kind of have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module, it is characterized in that, bikini oscillator is reined in the west that comprises band shape antenna in the formation, detecting circuit and active biased circuit, described west is reined in the mixed frequency signal of bikini oscillator output and is handled the Doppler beat freque signal of formation after detection through detecting circuit, as the output that connects back level signal processing circuit, described active biased circuit is made of constant current triode (T3), the emitter of described constant current triode (T3) connects positive source through the 8th resistance (R8), collector connects the base stage that the generator triode of bikini oscillator (T1) reined in the west through the 4th resistance (R4) and the 3rd inductance (L3) successively, on constant current triode (T3) base stage, below-center offset resistance is respectively second resistance (R2) and the 3rd resistance (R3).
2, has a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module according to claim 1 is described, it is characterized in that, described west is reined in bikini oscillator and is made up of generator triode (T1), tours antenna (AN), inductance, electric capacity and resistance, the collector of described generator triode (T1) is through an end of first inductance (L1), second electric capacity (C2) T-Ring shape antenna (AN), base stage is formed the positive feedback network through second inductance (L2) of serial connection, the other end of first electric capacity (C1) T-Ring shape antenna (AN); Emitter is formed the direct current negative feedback network through the 4th inductance (L4) and the 6th resistance (R6) successively; Described the 4th inductance (L4) constitutes filtering circuit with the 4th electric capacity (C4), and the 5th electric capacity (C5) constitutes the base stage of generator triode (T1) and the AC feedback circuit between the emitter simultaneously.
3, describedly has a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module according to claim 1 or 2, it is characterized in that, described detecting circuit is made of detection triode (T2), the emitter of described detection triode (T2) connects positive source, base stage connects the output terminal of generator triode (T1), emitter is with connecting impedance line (L0) between the ground level, collector connects power cathode through the 6th inductance (L6) and the 7th resistance (R7) successively, the 6th inductance (L6) is connected in series with the 7th resistance (R7) o'clock behind the 9th resistance (R9) as output terminal, the 7th electric capacity (C7) is filter capacitor, is parallel to the 7th resistance (R7) and goes up the formation selecting frequency filtering network.
4, have a wide warm area high sensitivity microwave electronic distance measuring instrument front-end module according to claim 3 is described, it is characterized in that, serial connection the 5th inductance (L5) in the emitter circuit of described detection triode (T2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920101950U CN201373920Y (en) | 2009-03-20 | 2009-03-20 | Microwave electronic distance meter front end module with wide-temperature range and high sensitivity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920101950U CN201373920Y (en) | 2009-03-20 | 2009-03-20 | Microwave electronic distance meter front end module with wide-temperature range and high sensitivity |
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| Publication Number | Publication Date |
|---|---|
| CN201373920Y true CN201373920Y (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920101950U Expired - Fee Related CN201373920Y (en) | 2009-03-20 | 2009-03-20 | Microwave electronic distance meter front end module with wide-temperature range and high sensitivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152032A (en) * | 2013-02-28 | 2013-06-12 | 北京空间飞行器总体设计部 | Crystal oscillating circuit |
| CN105988035A (en) * | 2015-02-27 | 2016-10-05 | 上海宣研电子科技有限公司 | Waveform detection circuit, switch power supply and communication detector |
-
2009
- 2009-03-20 CN CN200920101950U patent/CN201373920Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152032A (en) * | 2013-02-28 | 2013-06-12 | 北京空间飞行器总体设计部 | Crystal oscillating circuit |
| CN103152032B (en) * | 2013-02-28 | 2015-09-23 | 北京空间飞行器总体设计部 | A kind of crystal oscillating circuit |
| CN105988035A (en) * | 2015-02-27 | 2016-10-05 | 上海宣研电子科技有限公司 | Waveform detection circuit, switch power supply and communication detector |
| CN105988035B (en) * | 2015-02-27 | 2019-01-18 | 苏州力生美半导体有限公司 | Waveform detection circuit, Switching Power Supply and communication wave detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20150320 |
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| EXPY | Termination of patent right or utility model |