CN103457042B - active rod antenna - Google Patents
active rod antenna Download PDFInfo
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- CN103457042B CN103457042B CN201310413739.0A CN201310413739A CN103457042B CN 103457042 B CN103457042 B CN 103457042B CN 201310413739 A CN201310413739 A CN 201310413739A CN 103457042 B CN103457042 B CN 103457042B
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Abstract
The invention provides a kind of electrical field test instrument, this active rod antenna is made up of telescopic antenna, ground connection flat board, antenna base three part.The electric field signal of telescopic antenna inductive spacing, output voltage signal, this voltage signal is coupled to antenna base inside, after carrying out signal condition and impedance transformation by antenna base internal circuit, export the signal of telecommunication of reflection Field signature, this signal of telecommunication directly can export the rf inputs of spectrum analyzer to by radio frequency cable.The present invention is highly sensitive, and back noise is low, antenna factor is smooth, dynamic range is large, meets the RE102 testing requirement of national standard GJB152A-97.
Description
Technical field
The invention belongs to electromagnetic measurement device field, is a kind of highly sensitive, the weak electric field tester that back noise is low, antenna factor is smooth, dynamic range is large.
Background technology
Along with electronic technology fast development, electromagnetic compatibility specification is also progressively set up and perfect, and electromagnetic compatibility standard specifies examine and the electric field radiation limiting conventional electronic device is launched, therefore just very necessary to the detection of spatial weak electric jamming signal.Passive whip antenna because of antenna factor excessive, sensitivity is low, and the field intensity of space 50dB below μ V/m detects and is difficult to realize, and therefore can not meet weak electric field testing requirement; Common active rod antenna because of back noise excessive, small-signal is aliasing in back noise, is therefore also difficult to reach weak electric field testing requirement.
Summary of the invention
The technical problem of weak electric field testing requirement can not be met for solving existing antenna, the invention provides the active rod antenna that a kind of back noise is low, be exclusively used in the RE102 test of national standard GJB152A-97.
Technical solution of the present invention is as follows:
A kind of active rod antenna, comprise pull bar electric wire 1, ground connection flat board 2, antenna base 3, the shell of described antenna base 3 is made up of upper cover and casing, described upper cover and casing be physics conducting on circuit, described ground connection flat board 2 is positioned at above antenna base 3, and with the shell conducting of antenna base 3
Its special character is: be provided with array signal processing unit in described antenna base 3, and described array signal processing unit comprises signal condition unit 4, power supply unit 5 and charhing unit 6; The afterbody of described telescopic antenna 1 is fixedly connected with signal condition unit 4 through ground connection dull and stereotyped 2;
Described signal condition unit 4 comprises the one-level impedance inverter circuit, secondary impedance inverter circuit and the gain circuitry that connect successively,
Described one-level impedance inverter circuit, secondary impedance inverter circuit and gain circuitry are printed on same impedance inverter circuit plate 41,
Described power supply unit 5 is with battery pack 51 for core, and described charhing unit 6 comprises power module 61, and described battery pack 51 is powered for impedance inverter circuit plate 41, and described power module 61 charges for battery pack 51;
Being not in contact with each other between described impedance inverter circuit plate 41, battery pack 51, power module 61, it is inner to be individually fixed in antenna base 3, described antenna base 3 is metallic conductor, wherein impedance inverter circuit plate 41 is positioned in the middle part of antenna base 3 inner upper, and the two ends of impedance inverter circuit plate 41 are connected by the upper cover of conductive component with antenna base 3;
Described power supply unit 5 and charhing unit 6 are connected with the bottom half of antenna base 3.
The signal output interface of above-mentioned antenna base 3 is connected with the signal output part of secondary impedance inverter circuit and the signal output part of gain circuitry respectively by single-pole double-throw switch (SPDT) S1.
Above-mentioned one-level impedance inverter circuit comprises signal and introduces unit, voltage signal converting unit, and described secondary impedance inverter circuit comprises current signal amplifying unit,
Described voltage signal converting unit comprises field effect transistor Q1, for arranging resistance unit, drain resistance unit, the source resistance unit of field effect transistor Q1 quiescent point; Described resistance unit is connected with power output end respectively with the other end of drain resistance unit, the other end ground connection of described source resistance unit;
One end that described signal introduces unit is connected with telescopic antenna 1, and described signal is introduced the other end of unit and is connected with the grid of field effect transistor Q1;
Described current signal amplifying unit comprises transistor Q2, for arranging base resistance unit, collector resistance unit, the emitter resistance unit of the quiescent point of transistor Q2; Described base resistance unit is connected with power supply side with the other end of collector resistance unit, the other end ground connection of described emitter resistance unit;
Also comprise the first power filtering capacitor group and second source filter capacitor group, described first power filtering capacitor group is connected between power supply VCC and resistance unit, and described second source filter capacitor group is connected between power supply VCC and drain resistance unit;
Also comprise the first coupling unit be arranged between field effect transistor Q1 source electrode and transistor Q2 base stage,
Also comprise the second coupling unit be arranged between transistor Q2 emitter and gain circuitry input,
Also comprise the first feedback unit be arranged between field effect transistor Q1 source electrode and resistance unit,
Also comprise be arranged on transistor Q2 emitter and field effect transistor Q1 drain between the second feedback unit.
Above-mentioned resistance unit comprises R1, R2, R3, described R1 and R3 series connection, and an end of described R2 is connected between R1 and R3, the other end ground connection of described R2,
Described drain resistance unit comprises resistance R6,
Described source resistance unit comprises resistance R5,
Described signal is introduced unit and is comprised resistance R4,
Described base resistance unit comprises resistance R9 and resistance R10, and one end of described resistance R10 is connected with the base stage of transistor Q2, the other end ground connection of described resistance R10,
Described collector resistance unit comprises resistance R11,
Described emitter resistance unit comprises resistance R8,
Described first power filtering capacitor group comprises two electric capacity C1 and C2 in parallel,
Described second source filter capacitor group comprises two electric capacity C4 and C5 in parallel,
Described first signal coupling unit comprises electric capacity C6,
Described secondary signal coupling unit comprises two electric capacity C10 and C11 in parallel,
Described second feedback unit comprises resistant series resistance R7 together and electric capacity C7;
Described first feedback unit comprises electric capacity C3, and the contact of described electric capacity C3 and resistance unit is the common port of resistance R1, resistance R2, resistance R3.
Above-mentioned gain circuitry with amplification chip U1 for core, the input of described amplification chip U1 is coupled by the output signal of attenuation units with secondary impedance inverter circuit, resistance R13 is also connected with, the other end ground connection of described resistance R13 between the input of described attenuation units and amplification chip U1;
The input port of described amplification chip U1 is provided with ac circuit unit, the other end ground connection of described ac circuit unit;
The feeder ear of described amplification chip U1 is connected with power supply by power supply voltage stabilizing chip U3, slide rheostat RP1 is also provided with between described power supply voltage stabilizing chip U3 and the feeder ear of amplification chip U1, the feeder ear of described amplification chip U1 is also provided with the 3rd power filtering capacitor group, the other end ground connection of described 3rd power filtering capacitor group;
The output of described amplification chip U1 is by the 3rd signal coupling element output signal.
Above-mentioned ac circuit comprises two electric capacity C12 and C13 be connected in parallel,
Upper described 3rd power filtering capacitor group comprises two electric capacity C18 and C19 be connected in parallel,
Upper described 3rd signal coupling unit comprises two electric capacity C14 and C15 be connected in parallel,
Upper described attenuation units comprises resistance R12 and the R19 be cascaded.
Above-mentioned field effect transistor Q1 is low noise field effect transistor, and described transistor Q2 is high frequency transistor, and described amplification chip U1 is low noise amplification chip.
Above-mentioned power supply unit 5 also comprises single-pole double-throw switch (SPDT) S2, indicator light L1, and described battery pack 51 is connected with the positive source input of impedance inverter circuit plate 41 and the positive source output of charhing unit 6 respectively by single-pole double-throw switch (SPDT) S2,
Above-mentioned single-pole double-throw switch (SPDT) S2 and indicator light L1 is installed on conduction casing front panel, and one end of described indicator light L1 is connected with the positive source input of impedance inverter circuit plate, other end ground connection;
Described charhing unit 6 also comprises the charging indicator light L2 being arranged on conduction casing front panel, and one end of described charging indicator light L2 is connected with the positive source output of power module 61 with by resistance R and diode D+, the other end ground connection of L2; The 220VAC power input interface 11 of described power module is positioned on conduction cabinet rear panel.
The material of above-mentioned ground connection flat board 2, antenna base, conductive component is aluminium, and described ground connection dull and stereotyped 2 is two blocks of aluminium sheets by gemel connection.
Above-mentioned single-pole double-throw switch (SPDT) S1 is installed on pedestal front panel, and the common port of described single-pole double-throw switch (SPDT) S1 is connected with the inner wire of coaxial connector J2, and the outer conductor of described coaxial connector J2 connects pedestal casing.
Beneficial effect of the present invention:
1. working frequency range is wide.This active rod antenna is generally used for 10kHz ~ 30MHz frequency range.If any specific demand, active rod antenna working frequency range can be expanded to 1kHz ~ 50MHz(by antenna factor calibration realization).
2. back noise is low.Active rod antenna self back noise is extremely low, is less than the 18dB μ V/m that national military standard specifies.
3. antenna factor is low.Be 2.5dB [1/m] ~ 3.1dB [1/m] at 10kHz ~ 10MHz frequency range internal antenna coefficient; Be 3.1dB [1/m] ~ 5.5dB [1/m] at 10MHz ~ 30MHz frequency range internal antenna coefficient.
4. antenna factor is smooth, and frequency characteristic is good.Being 1dB in 10kHz ~ 10MHz antenna factor flatness, is ± 1dB in 10kHz ~ 20MHz antenna factor flatness.
5. highly sensitive.Active rod antenna can sense the electric field signal of 1 μ V/m.
6. the upper limit for height of test.Active rod antenna can the electric field signal of Validity Test 120dB μ V/m.By configuration attenuated inside circuit, active rod antenna can test the upper limit can reach 145dB μ V/m.
Accompanying drawing explanation
Fig. 1 active rod antenna outside drawing;
Fig. 2 telescopic antenna outside drawing;
Fig. 3 ground connection lithograph;
Fig. 4 antenna base block diagram;
Fig. 5 impedance inverter circuit sheet frame figure;
Fig. 6-1 is impedance inverter circuit block diagram;
Fig. 6 impedance inverter circuit figure;
Fig. 7 gain circuitry figure;
Fig. 8 base interior mounting arrangement figure;
Fig. 9 active rod antenna front panel figure;
Figure 10 active rod antenna rear board figure;
Wherein Reference numeral is: the input of 1-telescopic antenna, 2-ground connection flat board, 3-antenna base, 4-signal condition unit, 5-power supply unit, 6-charhing unit, 41-impedance inverter circuit plate, 51-battery pack, 61-power module, 7-hinge, 8-adapted seat, 9-foot pad, 10-signal output part, 11-power module.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with Figure of description, but embodiments of the present invention are not limited thereto.
A kind of active rod antenna, comprise pull bar electric wire, ground connection flat board 2, antenna base 3, telescopic antenna 1 adjustable length, after telescopic antenna 1 is fully withdrawn, the effective length be exposed in electric field is 1040mm, the afterbody of telescopic antenna 1 is the screw thread of 10mm length, the upper cover conducting of ground connection dull and stereotyped 2 and antenna base 3, ground connection flat board 2 is made up of two blocks of identical aluminium sheets, and two blocks of aluminium sheets are got up by gemel connection, ground connection flat board 2 is of a size of 600mm × 600mm after launching completely, and dull and stereotyped 2 thicknesss of slab of ground connection are 1.5mm.Dull and stereotyped 2 centres of ground connection have one
circular hole.Being telescopic antenna 1 directly over ground connection flat board 2, is pedestal immediately below ground connection flat board 2.Telescopic antenna 1 is through dull and stereotyped 2 centres of ground connection
circular hole after be connected with the internal signal conditioning unit 4 of pedestal by screw thread.?
circular hole surrounding have four
aperture, screw is through these four
aperture ground connection flat board 2 is fixed on pedestal.The shell of antenna base 3 is made up of upper cover and casing.Described upper cover and casing be physics conducting on circuit.
The present invention, by optimizing the line design of array signal processing unit and rationally carrying out the layout of array signal processing unit in base interior, makes the back noise that active rod antenna is very low.
Array signal processing unit comprises signal condition unit 4, power supply unit 5 and charhing unit 6, and there is rechargeable battery pack 51 power supply unit 5 inside, when active rod antenna carries out electrical field test, is powered for signal condition unit 4 by power supply unit 5; When power supply unit 5 electricity is not enough, active rod antenna stops carrying out electrical field test, is charged for power supply unit 5 by charhing unit 6.
Signal condition unit 4 comprises the one-level impedance inverter circuit, secondary impedance inverter circuit and the gain circuitry that connect successively, one-level impedance inverter circuit, secondary impedance inverter circuit and gain circuitry are printed on same impedance inverter circuit plate 41, the input impedance of one-level impedance inverter circuit is the megaohm order of magnitude, and output impedance is a kilo-ohm order of magnitude; The input impedance of secondary impedance inverter circuit is a kilo-ohm order of magnitude, and output impedance is ohmage magnitude; Gain circuitry is used for carrying out signal amplification.
Power supply unit 5 is with battery pack 51 for core, and charhing unit 6 comprises power module 61, and battery pack 51 is powered for impedance inverter circuit plate 41, and power module 61 charges for battery pack 51;
Being not in contact with each other between impedance inverter circuit plate 41, battery pack 51, power module 61, it is inner to be individually fixed in antenna base 3, antenna base 3 is metallic conductor, wherein impedance inverter circuit plate 41 is positioned in the middle part of antenna base 3 inner upper, and the two ends of impedance inverter circuit plate 41 are connected by the upper cover of conductive component with antenna base 3; Power supply unit 5 and charhing unit 6 are connected with bottom antenna base 3.
For convenience of the use of active rod antenna, can adapted seat 8 be set immediately below antenna base, active rod antenna can be arranged on antenna holder easily by this adapted seat 8, below pedestal, surrounding has four foots pad 9, after test completes, antenna base 3 can be placed in the plane of instrument stan stably by these foots pad 9.
For making active rod antenna, there is large dynamic band scope, both there is high sensitivity, weak electric field signal can be detected, there is again the high test upper limit, the detection demand of large-signal can be met, signal output interface 10, BNC coaxial port using BNC coaxial port as antenna base 3 is connected with the signal output part (large-signal end points) of secondary impedance inverter circuit and the signal output part (conventional end points) of gain circuitry respectively by single-pole double-throw switch (SPDT) S1.When carrying out conventional weak electric field and detecting, the public termination conventional end point of single-pole double-throw switch (SPDT) S1, now circuit amplification quantity is comparatively large, effectively can amplify the weak electric field signal detected; When comparatively highfield detects, single-pole double-throw switch (SPDT) S1 public termination large-signal end points, now circuit amplification quantity is less, and circuit exports can not be saturated, effectively can amplify the comparatively highfield signal detected.
For making antenna factor smooth, in one-level impedance inverter circuit of the present invention and secondary impedance inverter circuit, being all provided with feedback unit, in order to make hardware circuit self-noise little, selecting low noise electronic devices and components to carry out circuit realiration.Introduce the formation of one-level impedance circuit, secondary impedance circuit and gain circuitry below.
As shown in Figure 6, one-level impedance inverter circuit with field effect transistor Q1 for core is formed.Resistance R1, R2, R3, R5, R6 are for arranging the DC offset voltage of Q1.The space electric field signal that telescopic antenna 1 is responded to is coupled to the grid of field effect transistor Q1 by resistance R4, resistance R3 is for keeping the high input impedance of field effect transistor impedance inverter circuit.C1, C2, C4, C5 are filter capacitor, and C1, C2 are used for the filtering of fet gate direct current biasing, and C4, C5 are for the direct current biasing filtering that drains.Power supply VCC1 is that field effect transistor Q1 powers.Be divided into two-way after power supply VCC1 series resistance R1, lead up to R2 ground connection, R3 of leading up to is connected with the grid of field effect transistor Q1.Resistance R4 one end is connected with telescopic antenna 1 by structural mount, and the other end is connected with the grid of field effect transistor Q1.Resistance R1 connects power supply VCC1 end and is connected with filter capacitor C1, C2 nearby, the other end ground connection of filter capacitor C1, C2.Be connected with the drain electrode of field effect transistor Q1 after power supply VCC1 series resistance R6.Resistance R6 connects power supply VCC1 end and is connected with filter capacitor C4, C5 nearby, the other end ground connection of filter capacitor C4, C5.The source electrode of field effect transistor Q1 is divided into two-way and connects, and leads up to R5 ground connection, separately leads up to the common port of electric capacity C3 connecting resistance R1, R2, R3, forms feedback network, for improving gain flatness.The earthing of casing of field effect transistor Q1.
Secondary impedance inverter circuit with high frequency transistor Q2 for core is formed.Resistance R8, R9, R10, R11 are for arranging the DC bias voltage of Q2.One-level impedance inverter circuit output signal is coupled to the base stage of Q2 by capacitance C6.C8, C9 are filter capacitor, for the collector electrode direct current biasing filtering of high frequency transistor Q2.The output signal of high frequency transistor Q2 feeds back to one-level impedance inverter circuit by resistance R7, electric capacity C7, for improving gain flatness, the output signal of high frequency transistor Q2 is coupled to gain circuitry by capacitance C10, C11, Attenuation adjustable resistance R12, R19 simultaneously.Power supply VCC1 is that high frequency transistor Q2 powers.Be divided into two-way after power supply VCC1 series resistance R9, lead up to R10 ground connection, a road is connected with the base stage of high frequency transistor Q2.The common port of the source electrode of electric capacity C6 mono-termination field effect transistor Q1, electric capacity C3, resistance R5, the base stage of another termination high frequency transistor Q2, the common port of resistance R9, R10.The collector electrode of high frequency transistor Q2 is connect, the collector electrode of a termination Q2 after electric capacity C8, C9 parallel connection, other end ground connection after power supply VCC1 series resistance R11.The emitter of resistance R8 mono-termination Q2, other end ground connection.The emitter of a termination Q2 after electric capacity C7 and resistance R7 connects, the drain electrode of another termination field effect transistor Q1.The collector electrode of a termination Q2 after electric capacity C10, C11 parallel connection, connects 6 pin of low noise amplification chip U1 after other end series resistance R12, R19.
As shown in Figure 7, gain circuitry with low noise amplification chip U1 for core is formed.U1 is powered by power supply voltage stabilizing chip U3.Gain circuitry inputs the signal from secondary impedance inverter circuit by 6 pin of U1.The signal after amplifying is exported by 3 pin of U1.After resistance R12, R19 series connection, 6 pin of a termination U1, the common port of another termination capacitance C10, C11.After capacitance C14, C15 parallel connection, 3 pin of a termination U1, the other end is used as signal output interface.The 1 pin ground connection of U1,2 pin of U1,5 pin, 8 pin are unsettled.6 pin of resistance R13 mono-termination U1, other end ground connection, for adjusting signal termination condition.After electric capacity C12, C13 parallel connection, 7 pin of a termination U1, other end ground connection, electric capacity C12, C13 are for arranging the AC earth path of chip U1.The 1 pin input power VCC1 of voltage stabilizing chip U3, connects 4 pin of U1 after the 3 pin series resistance RP1 of U3.The 2 pin ground connection of U3.
The common port of electric capacity C10, C11 and resistance R12 to be held with " large-signal " of single-pole double-throw switch (SPDT) S1 by wire and is connected, after capacitance C14, C15 parallel connection, 3 pin of one termination U1, the other end to be held with " routine " of single-pole double-throw switch (SPDT) S1 by wire and is connected, the inner wire (1 pin) that common port and the signal on impedance inverter circuit plate 41 of single-pole double-throw switch (SPDT) S1 export coaxial connector J2 is connected, outer conductor (2 pin) ground connection of J2.
For reducing the interference that the direct power supply station of common power module brings, improve the overall performance of antenna, power pack of the present invention comprises power supply unit and charhing unit, and impedance inverter circuit plate adopts the supply power mode of battery pack, and the circuit of power supply unit and charhing unit is as described below:
Power supply unit 5 is except comprising battery pack 51, also comprise single-pole double-throw switch (SPDT) S2, indicator light L1, battery pack 51 is connected with the positive source input of impedance inverter circuit plate 41 and the positive source output of charhing unit 6 respectively by single-pole double-throw switch (SPDT) S2, and power supply unit 5 one aspect is that impedance inverter circuit plate 41 is powered; Can be self charging by charhing unit 6 on the other hand, carry out energy storage.Battery pack 51 is made up of rechargeable battery, battery pack 51 output voltage 18V, output current 1300mA.Battery pack 51 positive pole order double-pole double throw switch S2 common port, negative pole connects the casing of antenna base.When indicator light L1 is bright, represent that switch S 2 common port is held with ON and be connected, now battery pack 51 is powered for impedance inverter circuit plate 41.
Charhing unit, except comprising power module 61, also comprises resistance R, diode D+ and D-, indicator light L2.Power module 61 inputs 220V, 50Hz alternating current, exports 24V direct current, and after power module 61 positive pole exports V+ series resistance R, diode D+, be divided into two-way, a road is held with the OFF of S1 and is connected, and another road is connected with indicator light L2.Power module 61 negative pole exports and connects casing by diode D-.Indicator light L2 is bright, and represent that power module 61 inputs 220V, 50Hz alternating current, if now single-pole double-throw switch (SPDT) S1 common port is held with OFF and is connected, power module 61 charges for battery pack 51.
As shown in Figure 9, Figure 10, before testing, the telescopic antenna 1 of active rod antenna, ground connection flat board 2, antenna base 3 three part need to carry out physical connection, and during test, all settings and wiring are all at operation of front panel.During active rod antenna charging, powered by the 220VAC power input interface 11 of rear board.Single-pole double-throw switch (SPDT) S2 is positioned at the lower right of pedestal front panel, and when single-pole double-throw switch (SPDT) S2 is in ON position, relay indicating light L1 is bright, and now antenna is in electrical field test state.When single-pole double-throw switch (SPDT) S2 is in OFF position, relay indicating light L1 goes out, and represents that antenna is in off-mode.When antenna does not use, single-pole double-throw switch (SPDT) S2 should be made to be in OFF position, to guarantee that antenna is in off-mode.Single-pole double-throw switch (SPDT) S1 is positioned at the upper right side of pedestal front panel, is selected the mode of operation of antenna by single-pole double-throw switch (SPDT) S1.Common army's mark test selection conventionally test pattern.Under conventionally test pattern, antenna has high sensitivity and extremely low back noise.Large-signal pattern is selected when Devices to test EMI exceeds standard rectification.Under large-signal pattern, antenna can bear larger input electric field.When single-pole double-throw switch (SPDT) S2 is in ON position, when relay indicating light L1 is bright, represent that antenna is in electrical field test state.If when single-pole double-throw switch (SPDT) S2 is in ON position, relay indicating light L1 does not work, represent that battery electric quantity is not enough, need charging.When single-pole double-throw switch (SPDT) S2 is in OFF position, relay indicating light L1 does not work, and represents that antenna is in off-mode.Antenna receiving signal is exported to 50 Ω receivers, spectrum analyzer or radio frequency voltmeter by BNC output interface.By rear board battery charging inlet, can charge to the rechargeable battery set 51 of inner antenna easily.During charging, only need arrange single-pole double-throw switch (SPDT) S2 is in OFF position, 220V reference power supply line is inserted with power module 61 input on source antenna rear board, provides 220V/50Hz power supply to active antenna.Note front panel mains switch must being made to be in OFF position when charging, otherwise charging circuit does not work, even if provide 220V AC power to active antenna, also cannot charge to inner rechargeable battery set 51.
Claims (8)
1. an active rod antenna, comprise telescopic antenna (1), ground connection flat board (2), antenna base (3), the shell of described antenna base (3) is made up of upper cover and casing, described upper cover and casing be physics conducting on circuit, described ground connection flat board (2) is positioned at antenna base (3) top, and with the shell conducting of antenna base (3)
It is characterized in that: described antenna base is provided with array signal processing unit in (3), described array signal processing unit comprises signal condition unit (4), power supply unit (5) and charhing unit (6); The afterbody of described telescopic antenna (1) is fixedly connected with signal condition unit (4) through ground connection flat board (2);
Described signal condition unit (4) comprises the one-level impedance inverter circuit, secondary impedance inverter circuit and the gain circuitry that connect successively,
Described one-level impedance inverter circuit, secondary impedance inverter circuit and gain circuitry are printed on same impedance inverter circuit plate (41),
Described power supply unit (5) with battery pack (51) for core, described charhing unit (6) comprises power module (61), described battery pack (51) is impedance inverter circuit plate (41) power supply, and described power module (61) is battery pack (51) charging;
Being not in contact with each other between described impedance inverter circuit plate (41), battery pack (51), power module (61), it is inner to be individually fixed in antenna base (3), described antenna base (3) is metallic conductor, wherein impedance inverter circuit plate (41) is positioned in the middle part of antenna base (3) inner upper, and the two ends of impedance inverter circuit plate (41) are connected by the upper cover of conductive component with antenna base (3);
Described power supply unit (5) and charhing unit (6) are connected with the bottom half of antenna base (3); Described one-level impedance inverter circuit comprises signal and introduces unit, voltage signal converting unit, and described secondary impedance inverter circuit comprises current signal amplifying unit,
Described voltage signal converting unit comprises field effect transistor Q1, for arranging resistance unit, drain resistance unit, the source resistance unit of field effect transistor Q1 quiescent point; Described resistance unit is connected with power output end respectively with the other end of drain resistance unit, the other end ground connection of described source resistance unit;
One end that described signal introduces unit is connected with telescopic antenna (1), and described signal is introduced the other end of unit and is connected with the grid of field effect transistor Q1;
Described current signal amplifying unit comprises transistor Q2, for arranging base resistance unit, collector resistance unit, the emitter resistance unit of the quiescent point of transistor Q2; Described base resistance unit is connected with power supply side with the other end of collector resistance unit, the other end ground connection of described emitter resistance unit;
Also comprise the first power filtering capacitor group and second source filter capacitor group, described first power filtering capacitor group is connected between power supply VCC and resistance unit, and described second source filter capacitor group is connected between power supply VCC and drain resistance unit;
Also comprise the first coupling unit be arranged between field effect transistor Q1 source electrode and transistor Q2 base stage,
Also comprise the second coupling unit be arranged between transistor Q2 emitter and gain circuitry input,
Also comprise the first feedback unit be arranged between field effect transistor Q1 source electrode and resistance unit,
Also comprise be arranged on transistor Q2 emitter and field effect transistor Q1 drain between the second feedback unit;
Described gain circuitry with amplification chip U1 for core, the input of described amplification chip U1 is coupled by the output signal of attenuation units with secondary impedance inverter circuit, resistance R13 is also connected with, the other end ground connection of described resistance R13 between the input of described attenuation units and amplification chip U1;
The input port of described amplification chip U1 is provided with ac circuit unit, the other end ground connection of described ac circuit unit;
The feeder ear of described amplification chip U1 is connected with power supply by power supply voltage stabilizing chip U3, slide rheostat RP1 is also provided with between described power supply voltage stabilizing chip U3 and the feeder ear of amplification chip U1, the feeder ear of described amplification chip U1 is also provided with the 3rd power filtering capacitor group, the other end ground connection of described 3rd power filtering capacitor group;
The output of described amplification chip U1 is by the 3rd signal coupling element output signal.
2. active rod antenna according to claim 1, is characterized in that:
The signal output interface of described antenna base (3) is connected with the signal output part of secondary impedance inverter circuit and the signal output part of gain circuitry respectively by single-pole double-throw switch (SPDT) S1.
3. active rod antenna according to claim 2, is characterized in that: described resistance unit comprises R1, R2, R3, described R1 and R3 series connection, and an end of described R2 is connected between R1 and R3, the other end ground connection of described R2,
Described drain resistance unit comprises resistance R6,
Described source resistance unit comprises resistance R5,
Described signal is introduced unit and is comprised resistance R4,
Described base resistance unit comprises resistance R9 and resistance R10, and one end of described resistance R10 is connected with the base stage of transistor Q2, the other end ground connection of described resistance R10,
Described collector resistance unit comprises resistance R11,
Described emitter resistance unit comprises resistance R8,
Described first power filtering capacitor group comprises two electric capacity C1 and C2 in parallel,
Described second source filter capacitor group comprises two electric capacity C4 and C5 in parallel,
Described first coupling unit comprises electric capacity C6,
Described second coupling unit comprises two electric capacity C10 and C11 in parallel,
Described second feedback unit comprises resistant series resistance R7 together and electric capacity C7;
Described first feedback unit comprises electric capacity C3, and the contact of described electric capacity C3 and resistance unit is the common port of resistance R1, resistance R2, resistance R3.
4. active rod antenna according to claim 3, is characterized in that:
Described ac circuit comprises two electric capacity C12 and C13 be connected in parallel,
Described 3rd power filtering capacitor group comprises two electric capacity C18 and C19 be connected in parallel,
Described 3rd signal coupling unit comprises two electric capacity C14 and C15 be connected in parallel,
Described attenuation units comprises resistance R12 and the R19 be cascaded.
5. active rod antenna according to claim 4, is characterized in that: described field effect transistor Q1 is low noise field effect transistor, and described transistor Q2 is high frequency transistor, and described amplification chip U1 is low noise amplification chip.
6. active rod antenna according to claim 1, it is characterized in that: described power supply unit (5) also comprises single-pole double-throw switch (SPDT) S2, indicator light L1, described battery pack (51) is connected with the positive source input of impedance inverter circuit plate (41) and the positive source output of charhing unit (6) respectively by single-pole double-throw switch (SPDT) S2
Described single-pole double-throw switch (SPDT) S2 and indicator light L1 is installed on conduction casing front panel, and one end of described indicator light L1 is connected with the positive source input of impedance inverter circuit plate, other end ground connection;
Described charhing unit (6) also comprises the charging indicator light L2 being arranged on conduction casing front panel, one end of described charging indicator light L2 is connected with the positive source output of power module (61) with by resistance R and diode D+, the other end ground connection of L2; The 220VAC power input interface (11) of described power module is positioned on conduction cabinet rear panel.
7. active rod antenna according to claim 1, is characterized in that: the material of described ground connection flat board (2), antenna base, conductive component is aluminium, and described ground connection flat board (2) is two blocks of aluminium sheets by gemel connection.
8. active rod antenna according to claim 2, it is characterized in that: described single-pole double-throw switch (SPDT) S1 is installed on pedestal front panel, the common port of described single-pole double-throw switch (SPDT) S1 is connected with the inner wire of coaxial connector J2, and the outer conductor of described coaxial connector J2 connects pedestal casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310413739.0A CN103457042B (en) | 2013-06-28 | 2013-09-11 | active rod antenna |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269903 | 2013-06-28 | ||
| CN2013102699035 | 2013-06-28 | ||
| CN201310269903.5 | 2013-06-28 | ||
| CN201310413739.0A CN103457042B (en) | 2013-06-28 | 2013-09-11 | active rod antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103457042A CN103457042A (en) | 2013-12-18 |
| CN103457042B true CN103457042B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310413739.0A Active CN103457042B (en) | 2013-06-28 | 2013-09-11 | active rod antenna |
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| Country | Link |
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| CN (1) | CN103457042B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138685Y (en) * | 2007-12-28 | 2008-10-22 | 深圳华为通信技术有限公司 | Wireless terminal antenna |
| CN201629395U (en) * | 2010-04-07 | 2010-11-10 | 深圳创维－Rgb电子有限公司 | CMMB digital television signal receiving antenna and digital television receiving terminal |
| CN203547111U (en) * | 2013-10-28 | 2014-04-16 | 陕西泾渭建设集团有限公司 | Lightning protection connection device of construction steel tube scaffold and reinforced down lead |
-
2013
- 2013-09-11 CN CN201310413739.0A patent/CN103457042B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138685Y (en) * | 2007-12-28 | 2008-10-22 | 深圳华为通信技术有限公司 | Wireless terminal antenna |
| CN201629395U (en) * | 2010-04-07 | 2010-11-10 | 深圳创维－Rgb电子有限公司 | CMMB digital television signal receiving antenna and digital television receiving terminal |
| CN203547111U (en) * | 2013-10-28 | 2014-04-16 | 陕西泾渭建设集团有限公司 | Lightning protection connection device of construction steel tube scaffold and reinforced down lead |
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| Publication number | Publication date |
|---|---|
| CN103457042A (en) | 2013-12-18 |
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