CN2371677Y - Active flexible television antenna - Google Patents

Abstract

The utility model relates to an active flexible television antenna, which comprises at least two V frequency band signal receiving oscillators which are mutually connected in parallel and at least two U frequency band signal receiving oscillators which are mutually connected in parallel. The oscillators are respectively filtered by corresponding filter circuits, and then are mixed; the oscillators are amplified by a total amplifying circuit again, and then amplifying signals are output by the total amplifying circuit. Thus, the active flexible television antenna has the advantages of portability, wind resistance, rust prevention and rain prevention, and can effectively amplify received signals. Thus, remote areas with weak TV electrical waves can also receive high quality pictures with clear and stable filtration.

Description

A kind of active software television antenna

The utility model relates to a kind of television antenna.

Existing software antenna is made by coaxial cable, be followed in series to form by two or more annular U frequency band signals pick-up dipoles and two or more annular V frequency band signals pick-up dipole on the structure, this antenna has characteristics in light weight, that wind resistance is moistureproof, but because it does not have signal to amplify, view reception effect is under some influence in remote districts.

At above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of active software television antenna, so that television image clearly also can rating be arrived in the more weak area of television radio wave signal.

In order to achieve the above object, the technical solution of the utility model is to have adopted a kind of active software television antenna, this antenna comprises at least two V-band signal pick-up dipoles parallel with one another, at least two U frequency band signals pick-up dipole and DC power supply circuit parallel with one another, the input of the two ends of U frequency band signals pick-up dipole and corresponding U frequency range filter circuit with link to each other publicly, the input of the two ends of V-band signal pick-up dipole and corresponding V-band filter circuit with link to each other publicly, be connected into the input of overall signal amplification output circuit behind the output of U frequency range filter circuit and the output short circuit of V-band filter circuit, feed out amplifying signal to TV by the output of overall signal amplification output circuit.

Described antenna comprises by the coaxial cable of software and two U frequency band signals pick-up dipole u being formed by connecting with the heart yearn or the netting twine of coaxial cable ₁, u ₂With two V-band signal pick-up dipole v ₁, v ₂, described two U frequency band signals pick-up dipoles intersect deflection mutually 90 ° angle, and described two V-band signal pick-up dipoles intersect deflection mutually 90 ° angle.

Described U frequency band signals pick-up dipole is the annular oscillator, and the girth of annular oscillator is between 50cm-70cm.Described V-band signal pick-up dipole is flat ring type vibrator, and the length of run of flat ring type vibrator is between 160cm-190cm.

Described V-band resonant circuit is by inductance L ₁, inductance L ₂, capacitor C ₁The low pass T-shape filter circuit that connects into and by capacitor C ₂, capacitor C ₃, inductance L ₃The high pass T-shape filter circuit that connects into is composed in series mutually.

Described U frequency range filter circuit is by capacitor C ₄, capacitor C ₅, inductance L ₅The T-shape filter circuit that connects into is formed.The output of U frequency range filter circuit can also connect filtering NPN type triode T ₁Be the main common cathode signal amplification circuit that constitutes, triode T ₁Emitter connect public ground, triode T ₁Base stage and collector electrode respectively with resistance R ₁, resistance R ₂An end link to each other resistance R ₁, resistance R ₂Other end short circuit after pass through resistance R ₃Connect the positive pole of DC power supply circuit, triode T ₁Base stage connect the output of U frequency band signals filter circuit, triode T ₁Collector electrode by by capacitor C ₆, C ₇And inductance L ₆The T-shape filter circuit that constitutes links to each other with the input of overall signal amplifying circuit.

Described overall signal amplification output circuit is with NPN triode T ₂Be the main common cathode amplifying circuit that constitutes, triode T ₂Emitter connect public ground, triode T ₂Collector electrode and base stage respectively with resistance R ₅And resistance R ₄An end link to each other resistance R ₄, resistance R ₅Other end short circuit after pass through resistance R ₆Link to each other triode T with the positive pole of DC power supply circuit ₂Base stage be connected triode T as the input of overall signal amplification output circuit with the output signal short circuit mixing point of U frequency range filter circuit and V-band filter circuit ₂Collector electrode by by capacitor C ₈, capacitor C ₉And inductance L ₇The T-shape filter circuit output amplifying signal that connects into.

Because the termination of each oscillator directly links to each other with U frequency range or V-band filter circuit, the oscillator output signal does not have attenuation, has guaranteed effective input of overall amplifying circuit, makes circuit polar curve road simple more, reasonable, helps the operate as normal of overall amplifying circuit; In addition, the U frequency band signals mixes with the V-band signal to amplify after amplifying again to be exported, and helps the balance of U, V signal like this, has prevented mutual interference and self-excitation phenomena, has guaranteed the steady and audible of TV picture.

The utility model is further explained and explanation below in conjunction with accompanying drawing:

Fig. 1 is the circuit theory diagrams of embodiment 1 of the present utility model;

Fig. 2 is the circuit theory diagrams of embodiment 2 of the present utility model;

Fig. 3 is that oscillator of the present utility model is arranged schematic appearance.

Fig. 1 constitutes the circuit theory diagrams of embodiment 1 of the present utility model.Annular U frequency band signals pick-up dipole u ₁, u ₂Two ends I ₃, I ₄Parallel with one another, both girths are 65cm, its I ₃End links to each other its I with the input of corresponding U frequency range filter circuit ₄The public ground of termination.Flat annular V frequency range pick-up dipole v ₁, v ₂Two ends I ₁, I ₂Parallel with one another, both lengths of run are 180cm, its I ₁End links to each other its I with the input of corresponding V-band filter circuit ₂The public ground of termination.The output of U frequency range filter circuit and the output short circuit of V-band filter circuit are together, carry out the mixing of signal, be connected into the input of overall signal amplification output circuit then, output by the overall signal amplification output circuit feeds out amplifying signal to TV, and the overall signal amplification output circuit is by the direct current circuit supply.

Above-mentioned V-band filter circuit is by inductance L ₁, inductance L ₂, capacitor C ₁The T-shape low-pass filter circuit that connects into and by capacitor C ₂, capacitor C ₃, inductance L ₃The T-shape traffic filter circuit series connection that connects into forms.Wherein, inductance L ₁, inductance L ₂, capacitor C ₂, capacitor C ₃Series connection mutually successively, inductance L ₁And inductance L ₂Tie point pass through capacitor C ₁Connect public ground, capacitor C ₂And capacitor C ₃Tie point pass through inductance L ₃Connect public ground.Inductance L ₁Head end as the input of V-band filter circuit and an end I of V-band signal pick-up dipole ₁Link to each other capacitor C ₃The tail end filter inductance L that can connect ₄

Above-mentioned U frequency range filter circuit is by capacitor C ₄, capacitor C ₅, inductance L ₅The T-shape filter circuit that connects into forms, capacitor C ₄, capacitor C ₅Series connection mutually, its series connection point is by electroreception L ₅Connect public ground.Capacitor C ₄Head end as the input of U frequency range filter circuit and an end I of U frequency band signals pick-up dipole ₃Link to each other.

Above-mentioned overall signal amplification output circuit is with NPN type triode T ₂Be the main common cathode amplifying circuit that constitutes, triode T ₂Emitter connect public ground, its collector electrode and base stage respectively with resistance R ₅And resistance R ₄An end link to each other resistance R ₄, resistance R ₅Other end short circuit after pass through resistance R ₆Link to each other with the positive pole of DC power supply circuit.Triode T ₂Base stage link to each other with the output of U frequency range filter circuit and the short circuit point A of the output of V-band filter circuit as the input of overall signal amplification output circuit.Triode T ₂A base stage and a diode D ₁Negative pole link to each other.Diode D ₁Positive pole connect public ground.Triode T ₂Collector electrode by by capacitor C ₈, capacitor C ₉And inductance L ₇The T-shape filter circuit output amplifying signal that connects into.Wherein, capacitor C ₈, capacitor C ₉Series connection, its series connection point is by electroreception L ₇Connect public ground.Capacitor C ₈Head end and triode T ₂Collector electrode link to each other capacitor C ₉Tail end be the output of overall signal amplification output circuit, the heart yearn O of this output and TV feeder line ₁Link to each other, the netting twine of TV feeder line meets public ground O ₂

Fig. 2 constitutes the circuit theory diagrams of embodiment 2 of the present utility model.Among Fig. 2, U frequency band signals pick-up dipole, V-band signal pick-up dipole, V-band filter circuit, U frequency range filter circuit, overall signal amplification output circuit are identical with Fig. 1, different parts be between the input of the output of U frequency range filter circuit and overall signal amplification output circuit, to have connected one among Fig. 2 with triode T ₁It is the main common cathode amplifying circuit that constitutes and by capacitor C ₆, capacitor C ₇, inductance L ₆The filter circuit that is linked to be, wherein, triode T ₁Emitter connect public ground, its base stage links to each other with the output of U frequency range filter circuit, its base stage and collector electrode respectively with resistance R ₁And resistance R ₂An end link to each other resistance R ₁And resistance R ₂Other end short circuit after pass through resistance R ₃Link to each other with the positive pole of DC power supply circuit.Triode T ₁Collector electrode by the mutual capacitor C of series connection ₆, capacitor C ₇With triode T ₂Base stage link to each other capacitor C ₆And capacitor C ₇Serial connection point by electroreception L ₆Connect public ground.This partial circuit that increases among Fig. 2 can suitably amplify U frequency range received signal, to reach the balance with the V-band received signal.

Among Fig. 3, two U frequency band signals pick-up dipole u ₁, u ₂With two V-band signal pick-up dipole v ₁, v ₂Be formed by connecting by the coaxial cable of software and with the heart yearn of coaxial cable or netting twine, be provided with 90 ° intersection deflection angle between separately.Wherein, U frequency band signals pick-up dipole is the annular oscillator, and girth is between 50cm-70cm, generally select 65cm, V-band signal pick-up dipole is flat ring type vibrator, and length of run is between 160cm-190cm, generally choose 180cm, the height h of flat ring oscillator generally chooses 15cm.

Claims (7)

1, a kind of active software television antenna, it is characterized in that this antenna comprises at least two V-band signal pick-up dipoles parallel with one another, at least two U frequency band signals pick-up dipole and DC power supply circuit parallel with one another, the input of the two ends of U frequency band signals pick-up dipole and corresponding U frequency range filter circuit with link to each other publicly, the input of the two ends of V-band signal pick-up dipole and corresponding V-band filter circuit with link to each other publicly, be connected into the input of overall signal amplification output circuit behind the output of U frequency range filter circuit and the output short circuit of V-band filter circuit, feed out amplifying signal to TV by the output of overall signal amplification output circuit.

2, antenna according to claim 1 is characterized in that described antenna comprises by the coaxial cable of software and two U frequency band signals pick-up dipole (u being formed by connecting with the heart yearn or the netting twine of coaxial cable ₁, u ₂) and two V-band signal pick-up dipole (v ₁, v ₂), described two U frequency band signals pick-up dipoles intersect deflection mutually 90 ° angle, and described two V-band signal pick-up dipoles intersect deflection mutually 90 ° angle.

3, antenna according to claim 2, it is characterized in that described U frequency band signals pick-up dipole is the annular oscillator, the girth of annular oscillator is between 50cm-70cm, described V-band signal pick-up dipole is flat ring type vibrator, the length of run of flat ring type vibrator is between 160cm-190cm, and flat ring highly is 15cm.

4, antenna according to claim 3 is characterized in that described V-band filter circuit is by inductance L ₁, inductance L ₂, capacitor C ₁The low pass T-shape filter circuit that connects into and by capacitor C ₂, capacitor C ₃, inductance L ₃The high pass T-shape filter circuit that connects into is composed in series mutually.

5, antenna according to claim 3 is characterized in that described U frequency range filter circuit is by capacitor C ₄, capacitor C ₅, inductance L ₅The T-shape filter circuit that connects into is formed.

6, antenna according to claim 5 is characterized in that the output of described U frequency range filter circuit can also connect one with NPN type triode T ₁Be the main common cathode signal amplification circuit that constitutes, triode T ₁Emitter connect public ground, triode T ₁Base stage and collector electrode respectively with resistance R ₁, resistance R ₂An end link to each other resistance R ₁, resistance R ₂Other end filtering after pass through resistance R ₃Connect the positive pole of DC power supply circuit, triode T ₁Base stage connect the output of U frequency band signals filter circuit, triode T ₁Collector electrode by by capacitor C ₆, C ₇And inductance L ₆The T-shape filter circuit that constitutes links to each other with the input of overall signal amplification output circuit.

7, antenna according to claim 3 is characterized in that described overall signal amplification output circuit is with NPN type triode T ₂Be the main common cathode amplifying circuit that constitutes, triode T ₂Emitter connect public ground, triode T ₂Collector electrode and base stage respectively with resistance R ₅And resistance R ₄An end link to each other resistance R ₄, resistance R ₅Other end filtering after pass through resistance R ₆Link to each other triode T with the positive pole of DC power supply circuit ₂Base stage be connected triode T as the input of overall signal amplification output circuit with the output signal short circuit mixing point (A) of U frequency range filter circuit and V-band filter circuit ₂Collector electrode by by capacitor C ₈, capacitor C ₉And inductance L ₇The T-shape filter circuit output amplifying signal that connects into.

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